chore: bump version to 0.3.2

- Extension ID: conduct
- Version: 1.0.0
- Author: twbrandon7
- Description: Executes a single spec-kit phase via sub-agent delegation to reduce context pollution.

.devcontainer/post-create.sh

@@ -51,6 +51,10 @@ echo -e "\n🤖 Installing OpenCode CLI..."
 run_command "npm install -g opencode-ai@latest"
 echo "✅ Done"
 
+echo -e "\n🤖 Installing Pi Coding Agent..."
+run_command "npm install -g @mariozechner/pi-coding-agent@latest"
+echo "✅ Done"
+
 echo -e "\n🤖 Installing Kiro CLI..."
 # https://kiro.dev/docs/cli/
 KIRO_INSTALLER_URL="https://kiro.dev/install.sh"

.github/workflows/scripts/create-github-release.sh

@@ -58,6 +58,12 @@ gh release create "$VERSION" \
   .genreleases/spec-kit-template-vibe-ps-"$VERSION".zip \
   .genreleases/spec-kit-template-kimi-sh-"$VERSION".zip \
   .genreleases/spec-kit-template-kimi-ps-"$VERSION".zip \
+  .genreleases/spec-kit-template-trae-sh-"$VERSION".zip \
+  .genreleases/spec-kit-template-trae-ps-"$VERSION".zip \
+  .genreleases/spec-kit-template-pi-sh-"$VERSION".zip \
+  .genreleases/spec-kit-template-pi-ps-"$VERSION".zip \
+  .genreleases/spec-kit-template-iflow-sh-"$VERSION".zip \
+  .genreleases/spec-kit-template-iflow-ps-"$VERSION".zip \
   .genreleases/spec-kit-template-generic-sh-"$VERSION".zip \
   .genreleases/spec-kit-template-generic-ps-"$VERSION".zip \
   --title "Spec Kit Templates - $VERSION_NO_V" \

.github/workflows/scripts/create-release-packages.ps1

@@ -14,7 +14,7 @@
 
 .PARAMETER Agents
     Comma or space separated subset of agents to build (default: all)
-    Valid agents: claude, gemini, copilot, cursor-agent, qwen, opencode, windsurf, codex, kilocode, auggie, roo, codebuddy, amp, kiro-cli, bob, qodercli, shai, tabnine, agy, vibe, kimi, generic
+    Valid agents: claude, gemini, copilot, cursor-agent, qwen, opencode, windsurf, codex, kilocode, auggie, roo, codebuddy, amp, kiro-cli, bob, qodercli, shai, tabnine, agy, vibe, kimi, trae, pi, iflow, generic
 
 .PARAMETER Scripts
     Comma or space separated subset of script types to build (default: both)
@@ -454,6 +454,19 @@ function Build-Variant {
             New-Item -ItemType Directory -Force -Path $skillsDir | Out-Null
             New-KimiSkills -SkillsDir $skillsDir -ScriptVariant $Script
         }
+        'trae' {
+            $rulesDir = Join-Path $baseDir ".trae/rules"
+            New-Item -ItemType Directory -Force -Path $rulesDir | Out-Null
+            Generate-Commands -Agent 'trae' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $rulesDir -ScriptVariant $Script
+        }
+        'pi' {
+            $cmdDir = Join-Path $baseDir ".pi/prompts"
+            Generate-Commands -Agent 'pi' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $cmdDir -ScriptVariant $Script
+        }
+        'iflow' {
+            $cmdDir = Join-Path $baseDir ".iflow/commands"
+            Generate-Commands -Agent 'iflow' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $cmdDir -ScriptVariant $Script
+        }
         'generic' {
             $cmdDir = Join-Path $baseDir ".speckit/commands"
             Generate-Commands -Agent 'generic' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $cmdDir -ScriptVariant $Script
@@ -470,7 +483,7 @@ function Build-Variant {
 }
 
 # Define all agents and scripts
-$AllAgents = @('claude', 'gemini', 'copilot', 'cursor-agent', 'qwen', 'opencode', 'windsurf', 'codex', 'kilocode', 'auggie', 'roo', 'codebuddy', 'amp', 'kiro-cli', 'bob', 'qodercli', 'shai', 'tabnine', 'agy', 'vibe', 'kimi', 'generic')
+$AllAgents = @('claude', 'gemini', 'copilot', 'cursor-agent', 'qwen', 'opencode', 'windsurf', 'codex', 'kilocode', 'auggie', 'roo', 'codebuddy', 'amp', 'kiro-cli', 'bob', 'qodercli', 'shai', 'tabnine', 'agy', 'vibe', 'kimi', 'trae', 'pi', 'iflow', 'generic')
 $AllScripts = @('sh', 'ps')
 
 function Normalize-List {

.github/workflows/scripts/create-release-packages.sh

@@ -6,7 +6,7 @@ set -euo pipefail
 # Usage: .github/workflows/scripts/create-release-packages.sh <version>
 #   Version argument should include leading 'v'.
 #   Optionally set AGENTS and/or SCRIPTS env vars to limit what gets built.
-#     AGENTS  : space or comma separated subset of: claude gemini copilot cursor-agent qwen opencode windsurf codex kilocode auggie roo codebuddy amp shai tabnine kiro-cli agy bob vibe qodercli kimi generic (default: all)
+#     AGENTS  : space or comma separated subset of: claude gemini copilot cursor-agent qwen opencode windsurf codex kilocode auggie roo codebuddy amp shai tabnine kiro-cli agy bob vibe qodercli kimi trae pi iflow generic (default: all)
 #     SCRIPTS : space or comma separated subset of: sh ps (default: both)
 #   Examples:
 #     AGENTS=claude SCRIPTS=sh $0 v0.2.0
@@ -291,6 +291,15 @@ build_variant() {
     kimi)
       mkdir -p "$base_dir/.kimi/skills"
       create_kimi_skills "$base_dir/.kimi/skills" "$script" ;;
+    trae)
+      mkdir -p "$base_dir/.trae/rules"
+      generate_commands trae md "\$ARGUMENTS" "$base_dir/.trae/rules" "$script" ;;
+    pi)
+      mkdir -p "$base_dir/.pi/prompts"
+      generate_commands pi md "\$ARGUMENTS" "$base_dir/.pi/prompts" "$script" ;;
+    iflow)
+      mkdir -p "$base_dir/.iflow/commands"
+      generate_commands iflow md "\$ARGUMENTS" "$base_dir/.iflow/commands" "$script" ;;
     generic)
       mkdir -p "$base_dir/.speckit/commands"
       generate_commands generic md "\$ARGUMENTS" "$base_dir/.speckit/commands" "$script" ;;
@@ -300,7 +309,7 @@ build_variant() {
 }
 
 # Determine agent list
-ALL_AGENTS=(claude gemini copilot cursor-agent qwen opencode windsurf codex kilocode auggie roo codebuddy amp shai tabnine kiro-cli agy bob vibe qodercli kimi generic)
+ALL_AGENTS=(claude gemini copilot cursor-agent qwen opencode windsurf codex kilocode auggie roo codebuddy amp shai tabnine kiro-cli agy bob vibe qodercli kimi trae pi iflow generic)
 ALL_SCRIPTS=(sh ps)
 
 norm_list() {

AGENTS.md

@@ -33,11 +33,11 @@ Specify supports multiple AI agents by generating agent-specific command files a
 | **Cursor**                 | `.cursor/commands/`    | Markdown | `cursor-agent`  | Cursor CLI                  |
 | **Qwen Code**              | `.qwen/commands/`      | Markdown | `qwen`          | Alibaba's Qwen Code CLI     |
 | **opencode**               | `.opencode/command/`   | Markdown | `opencode`      | opencode CLI                |
-| **Codex CLI**              | `.codex/commands/`     | Markdown | `codex`         | Codex CLI                   |
+| **Codex CLI**              | `.codex/prompts/`      | Markdown | `codex`         | Codex CLI                   |
 | **Windsurf**               | `.windsurf/workflows/` | Markdown | N/A (IDE-based) | Windsurf IDE workflows      |
-| **Kilo Code**              | `.kilocode/rules/`     | Markdown | N/A (IDE-based) | Kilo Code IDE               |
-| **Auggie CLI**             | `.augment/rules/`      | Markdown | `auggie`        | Auggie CLI                  |
-| **Roo Code**               | `.roo/rules/`          | Markdown | N/A (IDE-based) | Roo Code IDE                |
+| **Kilo Code**              | `.kilocode/workflows/` | Markdown | N/A (IDE-based) | Kilo Code IDE               |
+| **Auggie CLI**             | `.augment/commands/`   | Markdown | `auggie`        | Auggie CLI                  |
+| **Roo Code**               | `.roo/commands/`       | Markdown | N/A (IDE-based) | Roo Code IDE                |
 | **CodeBuddy CLI**          | `.codebuddy/commands/` | Markdown | `codebuddy`     | CodeBuddy CLI               |
 | **Qoder CLI**              | `.qoder/commands/`     | Markdown | `qodercli`      | Qoder CLI                   |
 | **Kiro CLI**               | `.kiro/prompts/`       | Markdown | `kiro-cli`      | Kiro CLI                    |
@@ -45,7 +45,10 @@ Specify supports multiple AI agents by generating agent-specific command files a
 | **SHAI**                   | `.shai/commands/`      | Markdown | `shai`          | SHAI CLI                    |
 | **Tabnine CLI**            | `.tabnine/agent/commands/` | TOML | `tabnine`       | Tabnine CLI                 |
 | **Kimi Code**              | `.kimi/skills/`        | Markdown | `kimi`          | Kimi Code CLI (Moonshot AI) |
+| **Pi Coding Agent**        | `.pi/prompts/`         | Markdown | `pi`            | Pi terminal coding agent    |
+| **iFlow CLI**              | `.iflow/commands/`     | Markdown | `iflow`         | iFlow CLI (iflow-ai)        |
 | **IBM Bob**                | `.bob/commands/`       | Markdown | N/A (IDE-based) | IBM Bob IDE                 |
+| **Trae**                   | `.trae/rules/`         | Markdown | N/A (IDE-based) | Trae IDE                    |
 | **Generic**                | User-specified via `--ai-commands-dir` | Markdown | N/A | Bring your own agent        |
 
 ### Step-by-Step Integration Guide
@@ -84,7 +87,7 @@ This eliminates the need for special-case mappings throughout the codebase.
 - `folder`: Directory where agent-specific files are stored (relative to project root)
 - `commands_subdir`: Subdirectory name within the agent folder where command/prompt files are stored (default: `"commands"`)
   - Most agents use `"commands"` (e.g., `.claude/commands/`)
-  - Some agents use alternative names: `"agents"` (copilot), `"workflows"` (windsurf, kilocode), `"prompts"` (codex, kiro-cli), `"command"` (opencode - singular)
+  - Some agents use alternative names: `"agents"` (copilot), `"workflows"` (windsurf, kilocode), `"prompts"` (codex, kiro-cli, pi), `"command"` (opencode - singular)
   - This field enables `--ai-skills` to locate command templates correctly for skill generation
 - `install_url`: Installation documentation URL (set to `None` for IDE-based agents)
 - `requires_cli`: Whether the agent requires a CLI tool check during initialization
@@ -322,6 +325,7 @@ Require a command-line tool to be installed:
 - **SHAI**: `shai` CLI
 - **Tabnine CLI**: `tabnine` CLI
 - **Kimi Code**: `kimi` CLI
+- **Pi Coding Agent**: `pi` CLI
 
 ### IDE-Based Agents
 
@@ -335,7 +339,7 @@ Work within integrated development environments:
 
 ### Markdown Format
 
-Used by: Claude, Cursor, opencode, Windsurf, Kiro CLI, Amp, SHAI, IBM Bob, Kimi Code, Qwen
+Used by: Claude, Cursor, opencode, Windsurf, Kiro CLI, Amp, SHAI, IBM Bob, Kimi Code, Qwen, Pi
 
 **Standard format:**
 
@@ -373,6 +377,10 @@ Command content with {SCRIPT} and {{args}} placeholders.
 ## Directory Conventions
 
 - **CLI agents**: Usually `.<agent-name>/commands/`
+- **Common prompt-based exceptions**:
+  - Codex: `.codex/prompts/`
+  - Kiro CLI: `.kiro/prompts/`
+  - Pi: `.pi/prompts/`
 - **IDE agents**: Follow IDE-specific patterns:
   - Copilot: `.github/agents/`
   - Cursor: `.cursor/commands/`

CHANGELOG.md

@@ -7,10 +7,142 @@ Recent changes to the Specify CLI and templates are documented here.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.2] - 2026-03-19
+
+### Changed
+
+- Add conduct extension to community catalog (#1908)
+- feat(extensions): add verify-tasks extension to community catalog (#1871)
+- feat(presets): add enable/disable toggle and update semantics (#1891)
+- feat: add iFlow CLI support (#1875)
+- feat(commands): wire before/after hook events into specify and plan templates (#1886)
+- docs(catalog): add speckit-utils to community catalog (#1896)
+- docs: Add Extensions & Presets section to README (#1898)
+- chore: update DocGuard extension to v0.9.11 (#1899)
+- Update cognitive-squad catalog entry — Triadic Model, full lifecycle (#1884)
+- feat: register spec-kit-iterate extension (#1887)
+- fix(scripts): add explicit positional binding to PowerShell create-new-feature params (#1885)
+- fix(scripts): encode residual JSON control chars as \uXXXX instead of stripping (#1872)
+- chore: update DocGuard extension to v0.9.10 (#1890)
+- Feature/spec kit add pi coding agent pullrequest (#1853)
+- feat: register spec-kit-learn extension (#1883)
+- chore: bump version to 0.3.1 (#1880)
+- docs: add greenfield Spring Boot pirate-speak preset demo to README (#1878)
+- fix(ai-skills): exclude non-speckit copilot agent markdown from skill… (#1867)
+- feat: add Trae IDE support as a new agent (#1817)
+- feat(cli): polite deep merge for settings.json and support JSONC (#1874)
+- feat(extensions,presets): add priority-based resolution ordering (#1855)
+- fix(scripts): suppress stdout from git fetch in create-new-feature.sh (#1876)
+- fix(scripts): harden bash scripts — escape, compat, and error handling (#1869)
+- Add cognitive-squad to community extension catalog (#1870)
+- docs: add Go / React brownfield walkthrough to community walkthroughs (#1868)
+- chore: update DocGuard extension to v0.9.8 (#1859)
+- Feature: add specify status command (#1837)
+- fix(extensions): show extension ID in list output (#1843)
+- feat(extensions): add Archive and Reconcile extensions to community catalog (#1844)
+- feat: Add DocGuard CDD enforcement extension to community catalog (#1838)
+- chore: bump version to 0.3.0 (#1839)
+- feat(presets): Pluggable preset system with catalog, resolver, and skills propagation (#1787)
+- fix: match 'Last updated' timestamp with or without bold markers (#1836)
+- Add specify doctor command for project health diagnostics (#1828)
+- fix: harden bash scripts against shell injection and improve robustness (#1809)
+- fix: clean up command templates (specify, analyze) (#1810)
+- fix: migrate Qwen Code CLI from TOML to Markdown format (#1589) (#1730)
+- fix(cli): deprecate explicit command support for agy (#1798) (#1808)
+- Add /selftest.extension core extension to test other extensions (#1758)
+- feat(extensions): Quality of life improvements for RFC-aligned catalog integration (#1776)
+- Add Java brownfield walkthrough to community walkthroughs (#1820)
+- chore: bump version to 0.2.1 (#1813)
+- Added February 2026 newsletter (#1812)
+- feat: add Kimi Code CLI agent support (#1790)
+- docs: fix broken links in quickstart guide (#1759) (#1797)
+- docs: add catalog cli help documentation (#1793) (#1794)
+- fix: use quiet checkout to avoid exception on git checkout (#1792)
+- feat(extensions): support .extensionignore to exclude files during install (#1781)
+- feat: add Codex support for extension command registration (#1767)
+- chore: bump version to 0.2.0 (#1786)
+- fix: sync agent list comments with actual supported agents (#1785)
+- feat(extensions): support multiple active catalogs simultaneously (#1720)
+- Pavel/add tabnine cli support (#1503)
+- Add Understanding extension to community catalog (#1778)
+- Add ralph extension to community catalog (#1780)
+- Update README with project initialization instructions (#1772)
+- feat: add review extension to community catalog (#1775)
+- Add fleet extension to community catalog (#1771)
+- Integration of Mistral vibe support into speckit (#1725)
+- fix: Remove duplicate options in specify.md (#1765)
+- fix: use global branch numbering instead of per-short-name detection (#1757)
+- Add Community Walkthroughs section to README (#1766)
+- feat(extensions): add Jira Integration to community catalog (#1764)
+- Add Azure DevOps Integration extension to community catalog (#1734)
+- Fix docs: update Antigravity link and add initialization example (#1748)
+- fix: wire after_tasks and after_implement hook events into command templates (#1702)
+- make c ignores consistent with c++ (#1747)
+- chore: bump version to 0.1.13 (#1746)
+- feat: add kiro-cli and AGENT_CONFIG consistency coverage (#1690)
+- feat: add verify extension to community catalog (#1726)
+- Add Retrospective Extension to community catalog README table (#1741)
+- fix(scripts): add empty description validation and branch checkout error handling (#1559)
+- fix: correct Copilot extension command registration (#1724)
+- fix(implement): remove Makefile from C ignore patterns (#1558)
+- Add sync extension to community catalog (#1728)
+- fix(checklist): clarify file handling behavior for append vs create (#1556)
+- fix(clarify): correct conflicting question limit from 10 to 5 (#1557)
+- chore: bump version to 0.1.12 (#1737)
+- fix: use RELEASE_PAT so tag push triggers release workflow (#1736)
+- fix: release-trigger uses release branch + PR instead of direct push to main (#1733)
+- fix: Split release process to sync pyproject.toml version with git tags (#1732)
+
+
+## [0.3.1] - 2026-03-17
+
+### Changed
+
+- docs: add greenfield Spring Boot pirate-speak preset demo to README (#1878)
+- fix(ai-skills): exclude non-speckit copilot agent markdown from skills (#1867)
+- feat: add Trae IDE support as a new agent (#1817)
+- feat(cli): polite deep merge for settings.json and support JSONC (#1874)
+- feat(extensions,presets): add priority-based resolution ordering (#1855)
+- fix(scripts): suppress stdout from git fetch in create-new-feature.sh (#1876)
+- fix(scripts): harden bash scripts — escape, compat, and error handling (#1869)
+- Add cognitive-squad to community extension catalog (#1870)
+- docs: add Go / React brownfield walkthrough to community walkthroughs (#1868)
+- chore: update DocGuard extension to v0.9.8 (#1859)
+- Feature: add specify status command (#1837)
+- fix(extensions): show extension ID in list output (#1843)
+- feat(extensions): add Archive and Reconcile extensions to community catalog (#1844)
+- feat: Add DocGuard CDD enforcement extension to community catalog (#1838)
+
+
+## [0.3.0] - 2026-03-13
+
+### Changed
+
+- No changes have been documented for this release yet.
+
+<!-- Entries for 0.2.x and earlier releases are documented in their respective sections below. -->
+- make c ignores consistent with c++ (#1747)
+- chore: bump version to 0.1.13 (#1746)
+- feat: add kiro-cli and AGENT_CONFIG consistency coverage (#1690)
+- feat: add verify extension to community catalog (#1726)
+- Add Retrospective Extension to community catalog README table (#1741)
+- fix(scripts): add empty description validation and branch checkout error handling (#1559)
+- fix: correct Copilot extension command registration (#1724)
+- fix(implement): remove Makefile from C ignore patterns (#1558)
+- Add sync extension to community catalog (#1728)
+- fix(checklist): clarify file handling behavior for append vs create (#1556)
+- fix(clarify): correct conflicting question limit from 10 to 5 (#1557)
+- chore: bump version to 0.1.12 (#1737)
+- fix: use RELEASE_PAT so tag push triggers release workflow (#1736)
+- fix: release-trigger uses release branch + PR instead of direct push to main (#1733)
+- fix: Split release process to sync pyproject.toml version with git tags (#1732)
+
+
 ## [Unreleased]
 
 ### Added
 
+- feat(cli): polite deep merge for VSCode settings.json with JSONC support via `json5` and zero-data-loss fallbacks
 - feat(presets): Pluggable preset system with preset catalog and template resolver
 - Preset manifest (`preset.yml`) with validation for artifact, command, and script types
 - `PresetManifest`, `PresetRegistry`, `PresetManager`, `PresetCatalog`, `PresetResolver` classes in `src/specify_cli/presets.py`

README.md

@@ -25,6 +25,7 @@
 - [🚶 Community Walkthroughs](#-community-walkthroughs)
 - [🤖 Supported AI Agents](#-supported-ai-agents)
 - [🔧 Specify CLI Reference](#-specify-cli-reference)
+- [🧩 Making Spec Kit Your Own: Extensions & Presets](#-making-spec-kit-your-own-extensions--presets)
 - [📚 Core Philosophy](#-core-philosophy)
 - [🌟 Development Phases](#-development-phases)
 - [🎯 Experimental Goals](#-experimental-goals)
@@ -158,6 +159,10 @@ See Spec-Driven Development in action across different scenarios with these comm
 
 - **[Brownfield Java runtime extension](https://github.com/mnriem/spec-kit-java-brownfield-demo)** — Extends an existing open-source Jakarta EE runtime (Piranha, ~420,000 lines of Java, XML, JSP, HTML, and config files across 180 Maven modules) with a password-protected Server Admin Console, demonstrating spec-kit on a large multi-module Java project with no prior specs or constitution.
 
+- **[Brownfield Go / React dashboard demo](https://github.com/mnriem/spec-kit-go-brownfield-demo)** — Demonstrates spec-kit driven entirely from the **terminal using GitHub Copilot CLI**. Extends NASA's open-source Hermes ground support system (Go) with a lightweight React-based web telemetry dashboard, showing that the full constitution → specify → plan → tasks → implement workflow works from the terminal.
+
+- **[Greenfield Spring Boot MVC with a custom preset](https://github.com/mnriem/spec-kit-pirate-speak-preset-demo)** — Builds a Spring Boot MVC application from scratch using a custom pirate-speak preset, demonstrating how presets can reshape the entire spec-kit experience: specifications become "Voyage Manifests," plans become "Battle Plans," and tasks become "Crew Assignments" — all generated in full pirate vernacular without changing any tooling.
+
 ## 🤖 Supported AI Agents
 
 | Agent                                                                                | Support | Notes                                                                                                                                     |
@@ -176,14 +181,17 @@ See Spec-Driven Development in action across different scenarios with these comm
 | [Jules](https://jules.google.com/)                                                   | ✅      |                                                                                                                                           |
 | [Kilo Code](https://github.com/Kilo-Org/kilocode)                                    | ✅      |                                                                                                                                           |
 | [opencode](https://opencode.ai/)                                                     | ✅      |                                                                                                                                           |
+| [Pi Coding Agent](https://pi.dev)                                                    | ✅      | Pi doesn't have MCP support out of the box, so `taskstoissues` won't work as intended. MCP support can be added via [extensions](https://github.com/badlogic/pi-mono/tree/main/packages/coding-agent#extensions) |
 | [Qwen Code](https://github.com/QwenLM/qwen-code)                                     | ✅      |                                                                                                                                           |
 | [Roo Code](https://roocode.com/)                                                     | ✅      |                                                                                                                                           |
 | [SHAI (OVHcloud)](https://github.com/ovh/shai)                                       | ✅      |                                                                                                                                           |
 | [Tabnine CLI](https://docs.tabnine.com/main/getting-started/tabnine-cli)             | ✅      |                                                                                                                                           |
 | [Mistral Vibe](https://github.com/mistralai/mistral-vibe)                            | ✅      |                                                                                                                                           |
 | [Kimi Code](https://code.kimi.com/)                                                  | ✅      |                                                                                                                                           |
+| [iFlow CLI](https://docs.iflow.cn/en/cli/quickstart)                                 | ✅      |                                                                                                                                           |
 | [Windsurf](https://windsurf.com/)                                                    | ✅      |                                                                                                                                           |
 | [Antigravity (agy)](https://antigravity.google/)                                     | ✅      | Requires `--ai-skills` |
+| [Trae](https://www.trae.ai/)                                                         | ✅      |                                                                                                                                           |
 | Generic                                                                              | ✅      | Bring your own agent — use `--ai generic --ai-commands-dir <path>` for unsupported agents                                                 |
 
 ## 🔧 Specify CLI Reference
@@ -192,17 +200,17 @@ The `specify` command supports the following options:
 
 ### Commands
 
-| Command | Description                                                                                                                                             |
-| ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `init`  | Initialize a new Specify project from the latest template                                                                                               |
-| `check` | Check for installed tools (`git`, `claude`, `gemini`, `code`/`code-insiders`, `cursor-agent`, `windsurf`, `qwen`, `opencode`, `codex`, `kiro-cli`, `shai`, `qodercli`, `vibe`, `kimi`) |
+| Command | Description                                                                                                                                                                                                                  |
+| ------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `init`  | Initialize a new Specify project from the latest template                                                                                                                                                                    |
+| `check` | Check for installed tools: `git` plus all CLI-based agents configured in `AGENT_CONFIG` (for example: `claude`, `gemini`, `code`/`code-insiders`, `cursor-agent`, `windsurf`, `qwen`, `opencode`, `codex`, `kiro-cli`, `shai`, `qodercli`, `vibe`, `kimi`, `iflow`, `pi`, etc.) |
 
 ### `specify init` Arguments & Options
 
-| Argument/Option        | Type     | Description                                                                                                                                                                                  |
-| ---------------------- | -------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
-| `<project-name>`       | Argument | Name for your new project directory (optional if using `--here`, or use `.` for current directory)                                                                                           |
-| `--ai`                 | Option   | AI assistant to use: `claude`, `gemini`, `copilot`, `cursor-agent`, `qwen`, `opencode`, `codex`, `windsurf`, `kilocode`, `auggie`, `roo`, `codebuddy`, `amp`, `shai`, `kiro-cli` (`kiro` alias), `agy`, `bob`, `qodercli`, `vibe`, `kimi`, or `generic` (requires `--ai-commands-dir`) |
+| Argument/Option        | Type     | Description                                                                                                                                                                                                                                                                         |
+| ---------------------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| `<project-name>`       | Argument | Name for your new project directory (optional if using `--here`, or use `.` for current directory)                                                                                                                                                                                  |
+| `--ai`                 | Option   | AI assistant to use (see `AGENT_CONFIG` for the full, up-to-date list). Common options include: `claude`, `gemini`, `copilot`, `cursor-agent`, `qwen`, `opencode`, `codex`, `windsurf`, `kilocode`, `auggie`, `roo`, `codebuddy`, `amp`, `shai`, `kiro-cli` (`kiro` alias), `agy`, `bob`, `qodercli`, `vibe`, `kimi`, `iflow`, `pi`, or `generic` (requires `--ai-commands-dir`) |
 | `--ai-commands-dir`    | Option   | Directory for agent command files (required with `--ai generic`, e.g. `.myagent/commands/`)                                                                                                  |
 | `--script`             | Option   | Script variant to use: `sh` (bash/zsh) or `ps` (PowerShell)                                                                                                                                  |
 | `--ignore-agent-tools` | Flag     | Skip checks for AI agent tools like Claude Code                                                                                                                                              |
@@ -247,6 +255,9 @@ specify init my-project --ai vibe
 # Initialize with IBM Bob support
 specify init my-project --ai bob
 
+# Initialize with Pi Coding Agent support
+specify init my-project --ai pi
+
 # Initialize with Antigravity support
 specify init my-project --ai agy --ai-skills
 
@@ -317,6 +328,68 @@ Additional commands for enhanced quality and validation:
 | ----------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
 | `SPECIFY_FEATURE` | Override feature detection for non-Git repositories. Set to the feature directory name (e.g., `001-photo-albums`) to work on a specific feature when not using Git branches.<br/>\*\*Must be set in the context of the agent you're working with prior to using `/speckit.plan` or follow-up commands. |
 
+## 🧩 Making Spec Kit Your Own: Extensions & Presets
+
+Spec Kit can be tailored to your needs through two complementary systems — **extensions** and **presets** — plus project-local overrides for one-off adjustments:
+
+```mermaid
+block-beta
+    columns 1
+    overrides["⬆ Highest priority\nProject-Local Overrides\n.specify/templates/overrides/"]
+    presets["Presets — Customize core & extensions\n.specify/presets/<preset-id>/templates/"]
+    extensions["Extensions — Add new capabilities\n.specify/extensions/<ext-id>/templates/"]
+    core["Spec Kit Core — Built-in SDD commands & templates\n.specify/templates/\n⬇ Lowest priority"]
+
+    style overrides fill:transparent,stroke:#999
+    style presets fill:transparent,stroke:#4a9eda
+    style extensions fill:transparent,stroke:#4a9e4a
+    style core fill:transparent,stroke:#e6a817
+```
+
+**Templates** are resolved at **runtime** — Spec Kit walks the stack top-down and uses the first match. Project-local overrides (`.specify/templates/overrides/`) let you make one-off adjustments for a single project without creating a full preset. **Commands** are applied at **install time** — when you run `specify extension add` or `specify preset add`, command files are written into agent directories (e.g., `.claude/commands/`). If multiple presets or extensions provide the same command, the highest-priority version wins. On removal, the next-highest-priority version is restored automatically. If no overrides or customizations exist, Spec Kit uses its core defaults.
+
+### Extensions — Add New Capabilities
+
+Use **extensions** when you need functionality that goes beyond Spec Kit's core. Extensions introduce new commands and templates — for example, adding domain-specific workflows that are not covered by the built-in SDD commands, integrating with external tools, or adding entirely new development phases. They expand *what Spec Kit can do*.
+
+```bash
+# Search available extensions
+specify extension search
+
+# Install an extension
+specify extension add <extension-name>
+```
+
+For example, extensions could add Jira integration, post-implementation code review, V-Model test traceability, or project health diagnostics.
+
+See the [Extensions README](./extensions/README.md) for the full guide, the complete community catalog, and how to build and publish your own.
+
+### Presets — Customize Existing Workflows
+
+Use **presets** when you want to change *how* Spec Kit works without adding new capabilities. Presets override the templates and commands that ship with the core *and* with installed extensions — for example, enforcing a compliance-oriented spec format, using domain-specific terminology, or applying organizational standards to plans and tasks. They customize the artifacts and instructions that Spec Kit and its extensions produce.
+
+```bash
+# Search available presets
+specify preset search
+
+# Install a preset
+specify preset add <preset-name>
+```
+
+For example, presets could restructure spec templates to require regulatory traceability, adapt the workflow to fit the methodology you use (e.g., Agile, Kanban, Waterfall, jobs-to-be-done, or domain-driven design), add mandatory security review gates to plans, enforce test-first task ordering, or localize the entire workflow to a different language. The [pirate-speak demo](https://github.com/mnriem/spec-kit-pirate-speak-preset-demo) shows just how deep the customization can go. Multiple presets can be stacked with priority ordering.
+
+See the [Presets README](./presets/README.md) for the full guide, including resolution order, priority, and how to create your own.
+
+### When to Use Which
+
+| Goal | Use |
+| --- | --- |
+| Add a brand-new command or workflow | Extension |
+| Customize the format of specs, plans, or tasks | Preset |
+| Integrate an external tool or service | Extension |
+| Enforce organizational or regulatory standards | Preset |
+| Ship reusable domain-specific templates | Either — presets for template overrides, extensions for templates bundled with new commands |
+
 ## 📚 Core Philosophy
 
 Spec-Driven Development is a structured process that emphasizes:
@@ -424,7 +497,7 @@ specify init . --force --ai claude
 specify init --here --force --ai claude
 ```
 
-The CLI will check if you have Claude Code, Gemini CLI, Cursor CLI, Qwen CLI, opencode, Codex CLI, Qoder CLI, Tabnine CLI, Kiro CLI, or Mistral Vibe installed. If you do not, or you prefer to get the templates without checking for the right tools, use `--ignore-agent-tools` with your command:
+The CLI will check if you have Claude Code, Gemini CLI, Cursor CLI, Qwen CLI, opencode, Codex CLI, Qoder CLI, Tabnine CLI, Kiro CLI, Pi, or Mistral Vibe installed. If you do not, or you prefer to get the templates without checking for the right tools, use `--ignore-agent-tools` with your command:
 
 ```bash
 specify init <project_name> --ai claude --ignore-agent-tools

docs/installation.md

@@ -3,7 +3,7 @@
 ## Prerequisites
 
 - **Linux/macOS** (or Windows; PowerShell scripts now supported without WSL)
-- AI coding agent: [Claude Code](https://www.anthropic.com/claude-code), [GitHub Copilot](https://code.visualstudio.com/), [Codebuddy CLI](https://www.codebuddy.ai/cli) or [Gemini CLI](https://github.com/google-gemini/gemini-cli)
+- AI coding agent: [Claude Code](https://www.anthropic.com/claude-code), [GitHub Copilot](https://code.visualstudio.com/), [Codebuddy CLI](https://www.codebuddy.ai/cli), [Gemini CLI](https://github.com/google-gemini/gemini-cli), or [Pi Coding Agent](https://pi.dev)
 - [uv](https://docs.astral.sh/uv/) for package management
 - [Python 3.11+](https://www.python.org/downloads/)
 - [Git](https://git-scm.com/downloads)
@@ -35,6 +35,7 @@ uvx --from git+https://github.com/github/spec-kit.git specify init <project_name
 uvx --from git+https://github.com/github/spec-kit.git specify init <project_name> --ai gemini
 uvx --from git+https://github.com/github/spec-kit.git specify init <project_name> --ai copilot
 uvx --from git+https://github.com/github/spec-kit.git specify init <project_name> --ai codebuddy
+uvx --from git+https://github.com/github/spec-kit.git specify init <project_name> --ai pi
 ```
 
 ### Specify Script Type (Shell vs PowerShell)

docs/upgrade.md

@@ -289,8 +289,9 @@ This tells Spec Kit which feature directory to use when creating specs, plans, a
 
    ```bash
    ls -la .claude/commands/      # Claude Code
-   ls -la .gemini/commands/       # Gemini
-   ls -la .cursor/commands/       # Cursor
+   ls -la .gemini/commands/      # Gemini
+   ls -la .cursor/commands/      # Cursor
+   ls -la .pi/prompts/           # Pi Coding Agent
    ```
 
 3. **Check agent-specific setup:**
@@ -398,7 +399,7 @@ The `specify` CLI tool is used for:
 - **Upgrades:** `specify init --here --force` to update templates and commands
 - **Diagnostics:** `specify check` to verify tool installation
 
-Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/speckit.plan`, etc.) are **permanently installed** in your project's agent folder (`.claude/`, `.github/prompts/`, etc.). Your AI assistant reads these command files directly—no need to run `specify` again.
+Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/speckit.plan`, etc.) are **permanently installed** in your project's agent folder (`.claude/`, `.github/prompts/`, `.pi/prompts/`, etc.). Your AI assistant reads these command files directly—no need to run `specify` again.
 
 **If your agent isn't recognizing slash commands:**
 
@@ -410,6 +411,9 @@ Once you've run `specify init`, the slash commands (like `/speckit.specify`, `/s
 
    # For Claude
    ls -la .claude/commands/
+
+   # For Pi
+   ls -la .pi/prompts/
    ```
 
 2. **Restart your IDE/editor completely** (not just reload window)

extensions/EXTENSION-API-REFERENCE.md

@@ -53,7 +53,7 @@ provides:
       required: boolean  # Default: false
 
 hooks:                   # Optional, event hooks
-  event_name:            # e.g., "after_tasks", "after_implement"
+  event_name:            # e.g., "after_specify", "after_plan", "after_tasks", "after_implement"
     command: string      # Command to execute
     optional: boolean    # Default: true
     prompt: string       # Prompt text for optional hooks
@@ -108,7 +108,7 @@ defaults:                # Optional, default configuration values
 #### `hooks`
 
 - **Type**: object
-- **Keys**: Event names (e.g., `after_tasks`, `after_implement`, `before_commit`)
+- **Keys**: Event names (e.g., `after_specify`, `after_plan`, `after_tasks`, `after_implement`, `before_commit`)
 - **Description**: Hooks that execute at lifecycle events
 - **Events**: Defined by core spec-kit commands
 
@@ -551,10 +551,16 @@ hooks:
 
 Standard events (defined by core):
 
+- `before_specify` - Before specification generation
+- `after_specify` - After specification generation
+- `before_plan` - Before implementation planning
+- `after_plan` - After implementation planning
+- `before_tasks` - Before task generation
 - `after_tasks` - After task generation
+- `before_implement` - Before implementation
 - `after_implement` - After implementation
-- `before_commit` - Before git commit
-- `after_commit` - After git commit
+- `before_commit` - Before git commit *(planned - not yet wired into core templates)*
+- `after_commit` - After git commit *(planned - not yet wired into core templates)*
 
 ### Hook Configuration
 

extensions/EXTENSION-USER-GUIDE.md

@@ -387,6 +387,9 @@ settings:
   auto_execute_hooks: true
 
 # Hook configuration
+# Available events: before_specify, after_specify, before_plan, after_plan,
+#                   before_tasks, after_tasks, before_implement, after_implement
+# Planned (not yet wired into core templates): before_commit, after_commit
 hooks:
   after_tasks:
     - extension: jira

extensions/README.md

@@ -72,17 +72,28 @@ The following community-contributed extensions are available in [`catalog.commun
 
 | Extension | Purpose | URL |
 |-----------|---------|-----|
+| Archive Extension | Archive merged features into main project memory. | [spec-kit-archive](https://github.com/stn1slv/spec-kit-archive) |
 | Azure DevOps Integration | Sync user stories and tasks to Azure DevOps work items using OAuth authentication | [spec-kit-azure-devops](https://github.com/pragya247/spec-kit-azure-devops) |
 | Cleanup Extension | Post-implementation quality gate that reviews changes, fixes small issues (scout rule), creates tasks for medium issues, and generates analysis for large issues | [spec-kit-cleanup](https://github.com/dsrednicki/spec-kit-cleanup) |
+| Cognitive Squad | Multi-agent cognitive system with Triadic Model: understanding, internalization, application — with quality gates, backpropagation verification, and self-healing | [cognitive-squad](https://github.com/Testimonial/cognitive-squad) |
+| Conduct Extension | Orchestrates spec-kit phases via sub-agent delegation to reduce context pollution. | [spec-kit-conduct-ext](https://github.com/twbrandon7/spec-kit-conduct-ext) |
+| DocGuard — CDD Enforcement | Canonical-Driven Development enforcement. Validates, scores, and traces project documentation with automated checks, AI-driven workflows, and spec-kit hooks. Zero NPM runtime dependencies. | [spec-kit-docguard](https://github.com/raccioly/docguard) |
 | Fleet Orchestrator | Orchestrate a full feature lifecycle with human-in-the-loop gates across all SpecKit phases | [spec-kit-fleet](https://github.com/sharathsatish/spec-kit-fleet) |
+| Iterate | Iterate on spec documents with a two-phase define-and-apply workflow — refine specs mid-implementation and go straight back to building | [spec-kit-iterate](https://github.com/imviancagrace/spec-kit-iterate) |
 | Jira Integration | Create Jira Epics, Stories, and Issues from spec-kit specifications and task breakdowns with configurable hierarchy and custom field support | [spec-kit-jira](https://github.com/mbachorik/spec-kit-jira) |
+| Learning Extension | Generate educational guides from implementations and enhance clarifications with mentoring context | [spec-kit-learn](https://github.com/imviancagrace/spec-kit-learn) |
+| Project Health Check | Diagnose a Spec Kit project and report health issues across structure, agents, features, scripts, extensions, and git | [spec-kit-doctor](https://github.com/KhawarHabibKhan/spec-kit-doctor) |
+| Project Status | Show current SDD workflow progress — active feature, artifact status, task completion, workflow phase, and extensions summary | [spec-kit-status](https://github.com/KhawarHabibKhan/spec-kit-status) |
 | Ralph Loop | Autonomous implementation loop using AI agent CLI | [spec-kit-ralph](https://github.com/Rubiss/spec-kit-ralph) |
+| Reconcile Extension | Reconcile implementation drift by surgically updating feature artifacts. | [spec-kit-reconcile](https://github.com/stn1slv/spec-kit-reconcile) |
 | Retrospective Extension | Post-implementation retrospective with spec adherence scoring, drift analysis, and human-gated spec updates | [spec-kit-retrospective](https://github.com/emi-dm/spec-kit-retrospective) |
 | Review Extension | Post-implementation comprehensive code review with specialized agents for code quality, comments, tests, error handling, type design, and simplification | [spec-kit-review](https://github.com/ismaelJimenez/spec-kit-review) |
+| SDD Utilities | Resume interrupted workflows, validate project health, and verify spec-to-task traceability | [speckit-utils](https://github.com/mvanhorn/speckit-utils) |
 | Spec Sync | Detect and resolve drift between specs and implementation. AI-assisted resolution with human approval | [spec-kit-sync](https://github.com/bgervin/spec-kit-sync) |
 | Understanding | Automated requirements quality analysis — 31 deterministic metrics against IEEE/ISO standards with experimental energy-based ambiguity detection | [understanding](https://github.com/Testimonial/understanding) |
 | V-Model Extension Pack | Enforces V-Model paired generation of development specs and test specs with full traceability | [spec-kit-v-model](https://github.com/leocamello/spec-kit-v-model) |
 | Verify Extension | Post-implementation quality gate that validates implemented code against specification artifacts | [spec-kit-verify](https://github.com/ismaelJimenez/spec-kit-verify) |
+| Verify Tasks Extension | Detect phantom completions: tasks marked [X] in tasks.md with no real implementation | [spec-kit-verify-tasks](https://github.com/datastone-inc/spec-kit-verify-tasks) |
 
 
 ## Adding Your Extension

extensions/RFC-EXTENSION-SYSTEM.md

@@ -359,12 +359,15 @@ specify extension add jira
       "installed_at": "2026-01-28T14:30:00Z",
       "source": "catalog",
       "manifest_hash": "sha256:abc123...",
-      "enabled": true
+      "enabled": true,
+      "priority": 10
     }
   }
 }
 ```
 
+**Priority Field**: Extensions are ordered by `priority` (lower = higher precedence). Default is 10. Used for template resolution when multiple extensions provide the same template.
+
 ### 3. Configuration
 
 ```bash
@@ -1084,11 +1087,15 @@ List installed extensions in current project.
 $ specify extension list
 
 Installed Extensions:
-  ✓ jira (v1.0.0) - Jira Integration
-    Commands: 3 | Hooks: 2 | Status: Enabled
+  ✓ Jira Integration (v1.0.0)
+     jira
+     Create Jira issues from spec-kit artifacts
+     Commands: 3 | Hooks: 2 | Priority: 10 | Status: Enabled
 
-  ✓ linear (v0.9.0) - Linear Integration
-    Commands: 1 | Hooks: 1 | Status: Enabled
+  ✓ Linear Integration (v0.9.0)
+     linear
+     Create Linear issues from spec-kit artifacts
+     Commands: 1 | Hooks: 1 | Priority: 10 | Status: Enabled
 ```
 
 **Options:**
@@ -1196,10 +1203,9 @@ Next steps:
 
 **Options:**
 
-- `--from URL`: Install from custom URL or Git repo
-- `--version VERSION`: Install specific version
-- `--dev PATH`: Install from local path (development mode)
-- `--no-register`: Skip command registration (manual setup)
+- `--from URL`: Install from a remote URL (archive). Does not accept Git repositories directly.
+- `--dev`: Install from a local path in development mode (the PATH is the positional `extension` argument).
+- `--priority NUMBER`: Set resolution priority (lower = higher precedence, default 10)
 
 #### `specify extension remove NAME`
 
@@ -1280,6 +1286,29 @@ $ specify extension disable jira
 To re-enable: specify extension enable jira
 ```
 
+#### `specify extension set-priority NAME PRIORITY`
+
+Change the resolution priority of an installed extension.
+
+```bash
+$ specify extension set-priority jira 5
+
+✓ Extension 'Jira Integration' priority changed: 10 → 5
+
+Lower priority = higher precedence in template resolution
+```
+
+**Priority Values:**
+
+- Lower numbers = higher precedence (checked first in resolution)
+- Default priority is 10
+- Must be a positive integer (1 or higher)
+
+**Use Cases:**
+
+- Ensure a critical extension's templates take precedence
+- Override default resolution order when multiple extensions provide similar templates
+
 ---
 
 ## Compatibility & Versioning

extensions/catalog.community.json

@@ -1,8 +1,39 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-03-09T00:00:00Z",
+  "updated_at": "2026-03-19T12:08:20Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
+    "archive": {
+      "name": "Archive Extension",
+      "id": "archive",
+      "description": "Archive merged features into main project memory, resolving gaps and conflicts.",
+      "author": "Stanislav Deviatov",
+      "version": "1.0.0",
+      "download_url": "https://github.com/stn1slv/spec-kit-archive/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/stn1slv/spec-kit-archive",
+      "homepage": "https://github.com/stn1slv/spec-kit-archive",
+      "documentation": "https://github.com/stn1slv/spec-kit-archive/blob/main/README.md",
+      "changelog": "https://github.com/stn1slv/spec-kit-archive/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 0
+      },
+      "tags": [
+        "archive",
+        "memory",
+        "merge",
+        "changelog"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-14T00:00:00Z",
+      "updated_at": "2026-03-14T00:00:00Z"
+    },
     "azure-devops": {
       "name": "Azure DevOps Integration",
       "id": "azure-devops",
@@ -74,6 +105,153 @@
       "created_at": "2026-02-22T00:00:00Z",
       "updated_at": "2026-02-22T00:00:00Z"
     },
+    "cognitive-squad": {
+      "name": "Cognitive Squad",
+      "id": "cognitive-squad",
+      "description": "Multi-agent cognitive system with Triadic Model: understanding, internalization, application — with quality gates, backpropagation verification, and self-healing",
+      "author": "Testimonial",
+      "version": "0.1.0",
+      "download_url": "https://github.com/Testimonial/cognitive-squad/archive/refs/tags/v0.1.0.zip",
+      "repository": "https://github.com/Testimonial/cognitive-squad",
+      "homepage": "https://github.com/Testimonial/cognitive-squad",
+      "documentation": "https://github.com/Testimonial/cognitive-squad/blob/main/README.md",
+      "changelog": "https://github.com/Testimonial/cognitive-squad/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.3.0",
+        "tools": [
+          {
+            "name": "understanding",
+            "version": ">=3.4.0",
+            "required": false
+          },
+          {
+            "name": "spec-kit-reverse-eng",
+            "version": ">=1.0.0",
+            "required": false
+          }
+        ]
+      },
+      "provides": {
+        "commands": 10,
+        "hooks": 1
+      },
+      "tags": [
+        "ai-agents",
+        "cognitive",
+        "full-lifecycle",
+        "verification",
+        "multi-agent"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-16T00:00:00Z",
+      "updated_at": "2026-03-18T00:00:00Z"
+    },
+    "conduct": {
+      "name": "Conduct Extension",
+      "id": "conduct",
+      "description": "Executes a single spec-kit phase via sub-agent delegation to reduce context pollution.",
+      "author": "twbrandon7",
+      "version": "1.0.0",
+      "download_url": "https://github.com/twbrandon7/spec-kit-conduct-ext/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/twbrandon7/spec-kit-conduct-ext",
+      "homepage": "https://github.com/twbrandon7/spec-kit-conduct-ext",
+      "documentation": "https://github.com/twbrandon7/spec-kit-conduct-ext/blob/main/README.md",
+      "changelog": "https://github.com/twbrandon7/spec-kit-conduct-ext/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.3.1"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 0
+      },
+      "tags": [
+        "conduct",
+        "workflow",
+        "automation"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-19T12:08:20Z",
+      "updated_at": "2026-03-19T12:08:20Z"
+    },
+    "docguard": {
+      "name": "DocGuard \u2014 CDD Enforcement",
+      "id": "docguard",
+      "description": "Canonical-Driven Development enforcement. Validates, scores, and traces project documentation with automated checks, AI-driven workflows, and spec-kit hooks. Zero NPM runtime dependencies.",
+      "author": "raccioly",
+      "version": "0.9.11",
+      "download_url": "https://github.com/raccioly/docguard/releases/download/v0.9.11/spec-kit-docguard-v0.9.11.zip",
+      "repository": "https://github.com/raccioly/docguard",
+      "homepage": "https://www.npmjs.com/package/docguard-cli",
+      "documentation": "https://github.com/raccioly/docguard/blob/main/extensions/spec-kit-docguard/README.md",
+      "changelog": "https://github.com/raccioly/docguard/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0",
+        "tools": [
+          {
+            "name": "node",
+            "version": ">=18.0.0",
+            "required": true
+          }
+        ]
+      },
+      "provides": {
+        "commands": 6,
+        "hooks": 3
+      },
+      "tags": [
+        "documentation",
+        "validation",
+        "quality",
+        "cdd",
+        "traceability",
+        "ai-agents",
+        "enforcement",
+        "spec-kit"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-13T00:00:00Z",
+      "updated_at": "2026-03-18T18:53:31Z"
+    },
+    "doctor": {
+      "name": "Project Health Check",
+      "id": "doctor",
+      "description": "Diagnose a Spec Kit project and report health issues across structure, agents, features, scripts, extensions, and git.",
+      "author": "KhawarHabibKhan",
+      "version": "1.0.0",
+      "download_url": "https://github.com/KhawarHabibKhan/spec-kit-doctor/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/KhawarHabibKhan/spec-kit-doctor",
+      "homepage": "https://github.com/KhawarHabibKhan/spec-kit-doctor",
+      "documentation": "https://github.com/KhawarHabibKhan/spec-kit-doctor/blob/main/README.md",
+      "changelog": "https://github.com/KhawarHabibKhan/spec-kit-doctor/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 0
+      },
+      "tags": [
+        "diagnostics",
+        "health-check",
+        "validation",
+        "project-structure"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-13T00:00:00Z",
+      "updated_at": "2026-03-13T00:00:00Z"
+    },
     "fleet": {
       "name": "Fleet Orchestrator",
       "id": "fleet",
@@ -93,13 +271,48 @@
         "commands": 2,
         "hooks": 1
       },
-      "tags": ["orchestration", "workflow", "human-in-the-loop", "parallel"],
+      "tags": [
+        "orchestration",
+        "workflow",
+        "human-in-the-loop",
+        "parallel"
+      ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-03-06T00:00:00Z",
       "updated_at": "2026-03-06T00:00:00Z"
     },
+    "iterate": {
+      "name": "Iterate",
+      "id": "iterate",
+      "description": "Iterate on spec documents with a two-phase define-and-apply workflow — refine specs mid-implementation and go straight back to building",
+      "author": "Vianca Martinez",
+      "version": "2.0.0",
+      "download_url": "https://github.com/imviancagrace/spec-kit-iterate/archive/refs/tags/v2.0.0.zip",
+      "repository": "https://github.com/imviancagrace/spec-kit-iterate",
+      "homepage": "https://github.com/imviancagrace/spec-kit-iterate",
+      "documentation": "https://github.com/imviancagrace/spec-kit-iterate/blob/main/README.md",
+      "changelog": "https://github.com/imviancagrace/spec-kit-iterate/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 2,
+        "hooks": 0
+      },
+      "tags": [
+        "iteration",
+        "change-management",
+        "spec-maintenance"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-17T00:00:00Z",
+      "updated_at": "2026-03-17T00:00:00Z"
+    },
     "jira": {
       "name": "Jira Integration",
       "id": "jira",
@@ -160,13 +373,49 @@
         "commands": 2,
         "hooks": 1
       },
-      "tags": ["implementation", "automation", "loop", "copilot"],
+      "tags": [
+        "implementation",
+        "automation",
+        "loop",
+        "copilot"
+      ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-03-09T00:00:00Z",
       "updated_at": "2026-03-09T00:00:00Z"
     },
+    "reconcile": {
+      "name": "Reconcile Extension",
+      "id": "reconcile",
+      "description": "Reconcile implementation drift by surgically updating the feature's own spec, plan, and tasks.",
+      "author": "Stanislav Deviatov",
+      "version": "1.0.0",
+      "download_url": "https://github.com/stn1slv/spec-kit-reconcile/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/stn1slv/spec-kit-reconcile",
+      "homepage": "https://github.com/stn1slv/spec-kit-reconcile",
+      "documentation": "https://github.com/stn1slv/spec-kit-reconcile/blob/main/README.md",
+      "changelog": "https://github.com/stn1slv/spec-kit-reconcile/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 0
+      },
+      "tags": [
+        "reconcile",
+        "drift",
+        "tasks",
+        "remediation"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-14T00:00:00Z",
+      "updated_at": "2026-03-14T00:00:00Z"
+    },
     "retrospective": {
       "name": "Retrospective Extension",
       "id": "retrospective",
@@ -218,13 +467,53 @@
         "commands": 7,
         "hooks": 1
       },
-      "tags": ["code-review", "quality", "review", "testing", "error-handling", "type-design", "simplification"],
+      "tags": [
+        "code-review",
+        "quality",
+        "review",
+        "testing",
+        "error-handling",
+        "type-design",
+        "simplification"
+      ],
       "verified": false,
       "downloads": 0,
       "stars": 0,
       "created_at": "2026-03-06T00:00:00Z",
       "updated_at": "2026-03-06T00:00:00Z"
     },
+    "speckit-utils": {
+      "name": "SDD Utilities",
+      "id": "speckit-utils",
+      "description": "Resume interrupted workflows, validate project health, and verify spec-to-task traceability.",
+      "author": "mvanhorn",
+      "version": "1.0.0",
+      "download_url": "https://github.com/mvanhorn/speckit-utils/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/mvanhorn/speckit-utils",
+      "homepage": "https://github.com/mvanhorn/speckit-utils",
+      "documentation": "https://github.com/mvanhorn/speckit-utils/blob/main/README.md",
+      "changelog": "https://github.com/mvanhorn/speckit-utils/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 3,
+        "hooks": 2
+      },
+      "tags": [
+        "resume",
+        "doctor",
+        "validate",
+        "workflow",
+        "health-check"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-18T00:00:00Z",
+      "updated_at": "2026-03-18T00:00:00Z"
+    },
     "sync": {
       "name": "Spec Sync",
       "id": "sync",
@@ -260,7 +549,7 @@
     "understanding": {
       "name": "Understanding",
       "id": "understanding",
-      "description": "Automated requirements quality analysis — validates specs against IEEE/ISO standards using 31 deterministic metrics. Catches ambiguity, missing testability, and structural issues before they reach implementation. Includes experimental energy-based ambiguity detection using local LM token perplexity.",
+      "description": "Automated requirements quality analysis \u2014 validates specs against IEEE/ISO standards using 31 deterministic metrics. Catches ambiguity, missing testability, and structural issues before they reach implementation. Includes experimental energy-based ambiguity detection using local LM token perplexity.",
       "author": "Ladislav Bihari",
       "version": "3.4.0",
       "download_url": "https://github.com/Testimonial/understanding/archive/refs/tags/v3.4.0.zip",
@@ -298,6 +587,38 @@
       "created_at": "2026-03-07T00:00:00Z",
       "updated_at": "2026-03-07T00:00:00Z"
     },
+    "status": {
+      "name": "Project Status",
+      "id": "status",
+      "description": "Show current SDD workflow progress — active feature, artifact status, task completion, workflow phase, and extensions summary.",
+      "author": "KhawarHabibKhan",
+      "version": "1.0.0",
+      "download_url": "https://github.com/KhawarHabibKhan/spec-kit-status/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/KhawarHabibKhan/spec-kit-status",
+      "homepage": "https://github.com/KhawarHabibKhan/spec-kit-status",
+      "documentation": "https://github.com/KhawarHabibKhan/spec-kit-status/blob/main/README.md",
+      "changelog": "https://github.com/KhawarHabibKhan/spec-kit-status/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 0
+      },
+      "tags": [
+        "status",
+        "workflow",
+        "progress",
+        "feature-tracking",
+        "task-progress"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-16T00:00:00Z",
+      "updated_at": "2026-03-16T00:00:00Z"
+    },
     "v-model": {
       "name": "V-Model Extension Pack",
       "id": "v-model",
@@ -330,6 +651,37 @@
       "created_at": "2026-02-20T00:00:00Z",
       "updated_at": "2026-02-22T00:00:00Z"
     },
+    "learn": {
+      "name": "Learning Extension",
+      "id": "learn",
+      "description": "Generate educational guides from implementations and enhance clarifications with mentoring context.",
+      "author": "Vianca Martinez",
+      "version": "1.0.0",
+      "download_url": "https://github.com/imviancagrace/spec-kit-learn/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/imviancagrace/spec-kit-learn",
+      "homepage": "https://github.com/imviancagrace/spec-kit-learn",
+      "documentation": "https://github.com/imviancagrace/spec-kit-learn/blob/main/README.md",
+      "changelog": "https://github.com/imviancagrace/spec-kit-learn/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 2,
+        "hooks": 1
+      },
+      "tags": [
+        "learning",
+        "education",
+        "mentoring",
+        "knowledge-transfer"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-17T00:00:00Z",
+      "updated_at": "2026-03-17T00:00:00Z"
+    },
     "verify": {
       "name": "Verify Extension",
       "id": "verify",
@@ -361,6 +713,37 @@
       "stars": 0,
       "created_at": "2026-03-03T00:00:00Z",
       "updated_at": "2026-03-03T00:00:00Z"
+    },
+    "verify-tasks": {
+      "name": "Verify Tasks Extension",
+      "id": "verify-tasks",
+      "description": "Detect phantom completions: tasks marked [X] in tasks.md with no real implementation.",
+      "author": "Dave Sharpe",
+      "version": "1.0.0",
+      "download_url": "https://github.com/datastone-inc/spec-kit-verify-tasks/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/datastone-inc/spec-kit-verify-tasks",
+      "homepage": "https://github.com/datastone-inc/spec-kit-verify-tasks",
+      "documentation": "https://github.com/datastone-inc/spec-kit-verify-tasks/blob/main/README.md",
+      "changelog": "https://github.com/datastone-inc/spec-kit-verify-tasks/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 1,
+        "hooks": 1
+      },
+      "tags": [
+        "verification",
+        "quality",
+        "phantom-completion",
+        "tasks"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-03-16T00:00:00Z",
+      "updated_at": "2026-03-16T00:00:00Z"
     }
   }
 }

presets/README.md

@@ -13,13 +13,15 @@ When Spec Kit needs a template (e.g. `spec-template`), it walks a resolution sta
 
 If no preset is installed, core templates are used — exactly the same behavior as before presets existed.
 
+Template resolution happens **at runtime** — although preset files are copied into `.specify/presets/<id>/` during installation, Spec Kit walks the resolution stack on every template lookup rather than merging templates into a single location.
+
 For detailed resolution and command registration flows, see [ARCHITECTURE.md](ARCHITECTURE.md).
 
 ## Command Overrides
 
 Presets can also override the commands that guide the SDD workflow. Templates define *what* gets produced (specs, plans, constitutions); commands define *how* the LLM produces them (the step-by-step instructions).
 
-When a preset includes `type: "command"` entries, the commands are automatically registered into all detected agent directories (`.claude/commands/`, `.gemini/commands/`, etc.) in the correct format (Markdown or TOML with appropriate argument placeholders). When the preset is removed, the registered commands are cleaned up.
+Unlike templates, command overrides are applied **at install time**. When a preset includes `type: "command"` entries, the commands are registered into all detected agent directories (`.claude/commands/`, `.gemini/commands/`, etc.) in the correct format (Markdown or TOML with appropriate argument placeholders). When the preset is removed, the registered commands are cleaned up.
 
 ## Quick Start
 

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.2.1"
+version = "0.3.2"
 description = "Specify CLI, part of GitHub Spec Kit. A tool to bootstrap your projects for Spec-Driven Development (SDD)."
 requires-python = ">=3.11"
 dependencies = [
@@ -14,6 +14,7 @@ dependencies = [
     "pyyaml>=6.0",
     "packaging>=23.0",
     "pathspec>=0.12.0",
+    "json5>=0.13.0",
 ]
 
 [project.scripts]

scripts/bash/check-prerequisites.sh

@@ -79,15 +79,28 @@ SCRIPT_DIR="$(CDPATH="" cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/common.sh"
 
 # Get feature paths and validate branch
-eval $(get_feature_paths)
+_paths_output=$(get_feature_paths) || { echo "ERROR: Failed to resolve feature paths" >&2; exit 1; }
+eval "$_paths_output"
+unset _paths_output
 check_feature_branch "$CURRENT_BRANCH" "$HAS_GIT" || exit 1
 
 # If paths-only mode, output paths and exit (support JSON + paths-only combined)
 if $PATHS_ONLY; then
     if $JSON_MODE; then
         # Minimal JSON paths payload (no validation performed)
-        printf '{"REPO_ROOT":"%s","BRANCH":"%s","FEATURE_DIR":"%s","FEATURE_SPEC":"%s","IMPL_PLAN":"%s","TASKS":"%s"}\n' \
-            "$REPO_ROOT" "$CURRENT_BRANCH" "$FEATURE_DIR" "$FEATURE_SPEC" "$IMPL_PLAN" "$TASKS"
+        if has_jq; then
+            jq -cn \
+                --arg repo_root "$REPO_ROOT" \
+                --arg branch "$CURRENT_BRANCH" \
+                --arg feature_dir "$FEATURE_DIR" \
+                --arg feature_spec "$FEATURE_SPEC" \
+                --arg impl_plan "$IMPL_PLAN" \
+                --arg tasks "$TASKS" \
+                '{REPO_ROOT:$repo_root,BRANCH:$branch,FEATURE_DIR:$feature_dir,FEATURE_SPEC:$feature_spec,IMPL_PLAN:$impl_plan,TASKS:$tasks}'
+        else
+            printf '{"REPO_ROOT":"%s","BRANCH":"%s","FEATURE_DIR":"%s","FEATURE_SPEC":"%s","IMPL_PLAN":"%s","TASKS":"%s"}\n' \
+                "$(json_escape "$REPO_ROOT")" "$(json_escape "$CURRENT_BRANCH")" "$(json_escape "$FEATURE_DIR")" "$(json_escape "$FEATURE_SPEC")" "$(json_escape "$IMPL_PLAN")" "$(json_escape "$TASKS")"
+        fi
     else
         echo "REPO_ROOT: $REPO_ROOT"
         echo "BRANCH: $CURRENT_BRANCH"
@@ -141,14 +154,25 @@ fi
 # Output results
 if $JSON_MODE; then
     # Build JSON array of documents
-    if [[ ${#docs[@]} -eq 0 ]]; then
-        json_docs="[]"
+    if has_jq; then
+        if [[ ${#docs[@]} -eq 0 ]]; then
+            json_docs="[]"
+        else
+            json_docs=$(printf '%s\n' "${docs[@]}" | jq -R . | jq -s .)
+        fi
+        jq -cn \
+            --arg feature_dir "$FEATURE_DIR" \
+            --argjson docs "$json_docs" \
+            '{FEATURE_DIR:$feature_dir,AVAILABLE_DOCS:$docs}'
     else
-        json_docs=$(printf '"%s",' "${docs[@]}")
-        json_docs="[${json_docs%,}]"
+        if [[ ${#docs[@]} -eq 0 ]]; then
+            json_docs="[]"
+        else
+            json_docs=$(for d in "${docs[@]}"; do printf '"%s",' "$(json_escape "$d")"; done)
+            json_docs="[${json_docs%,}]"
+        fi
+        printf '{"FEATURE_DIR":"%s","AVAILABLE_DOCS":%s}\n' "$(json_escape "$FEATURE_DIR")" "$json_docs"
     fi
-    
-    printf '{"FEATURE_DIR":"%s","AVAILABLE_DOCS":%s}\n' "$FEATURE_DIR" "$json_docs"
 else
     # Text output
     echo "FEATURE_DIR:$FEATURE_DIR"

scripts/bash/common.sh

@@ -120,7 +120,7 @@ find_feature_dir_by_prefix() {
         # Multiple matches - this shouldn't happen with proper naming convention
         echo "ERROR: Multiple spec directories found with prefix '$prefix': ${matches[*]}" >&2
         echo "Please ensure only one spec directory exists per numeric prefix." >&2
-        echo "$specs_dir/$branch_name"  # Return something to avoid breaking the script
+        return 1
     fi
 }
 
@@ -134,21 +134,58 @@ get_feature_paths() {
     fi
 
     # Use prefix-based lookup to support multiple branches per spec
-    local feature_dir=$(find_feature_dir_by_prefix "$repo_root" "$current_branch")
+    local feature_dir
+    if ! feature_dir=$(find_feature_dir_by_prefix "$repo_root" "$current_branch"); then
+        echo "ERROR: Failed to resolve feature directory" >&2
+        return 1
+    fi
 
-    cat <<EOF
-REPO_ROOT='$repo_root'
-CURRENT_BRANCH='$current_branch'
-HAS_GIT='$has_git_repo'
-FEATURE_DIR='$feature_dir'
-FEATURE_SPEC='$feature_dir/spec.md'
-IMPL_PLAN='$feature_dir/plan.md'
-TASKS='$feature_dir/tasks.md'
-RESEARCH='$feature_dir/research.md'
-DATA_MODEL='$feature_dir/data-model.md'
-QUICKSTART='$feature_dir/quickstart.md'
-CONTRACTS_DIR='$feature_dir/contracts'
-EOF
+    # Use printf '%q' to safely quote values, preventing shell injection
+    # via crafted branch names or paths containing special characters
+    printf 'REPO_ROOT=%q\n' "$repo_root"
+    printf 'CURRENT_BRANCH=%q\n' "$current_branch"
+    printf 'HAS_GIT=%q\n' "$has_git_repo"
+    printf 'FEATURE_DIR=%q\n' "$feature_dir"
+    printf 'FEATURE_SPEC=%q\n' "$feature_dir/spec.md"
+    printf 'IMPL_PLAN=%q\n' "$feature_dir/plan.md"
+    printf 'TASKS=%q\n' "$feature_dir/tasks.md"
+    printf 'RESEARCH=%q\n' "$feature_dir/research.md"
+    printf 'DATA_MODEL=%q\n' "$feature_dir/data-model.md"
+    printf 'QUICKSTART=%q\n' "$feature_dir/quickstart.md"
+    printf 'CONTRACTS_DIR=%q\n' "$feature_dir/contracts"
+}
+
+# Check if jq is available for safe JSON construction
+has_jq() {
+    command -v jq >/dev/null 2>&1
+}
+
+# Escape a string for safe embedding in a JSON value (fallback when jq is unavailable).
+# Handles backslash, double-quote, and JSON-required control character escapes (RFC 8259).
+json_escape() {
+    local s="$1"
+    s="${s//\\/\\\\}"
+    s="${s//\"/\\\"}"
+    s="${s//$'\n'/\\n}"
+    s="${s//$'\t'/\\t}"
+    s="${s//$'\r'/\\r}"
+    s="${s//$'\b'/\\b}"
+    s="${s//$'\f'/\\f}"
+    # Escape any remaining U+0001-U+001F control characters as \uXXXX.
+    # (U+0000/NUL cannot appear in bash strings and is excluded.)
+    # LC_ALL=C ensures ${#s} counts bytes and ${s:$i:1} yields single bytes,
+    # so multi-byte UTF-8 sequences (first byte >= 0xC0) pass through intact.
+    local LC_ALL=C
+    local i char code
+    for (( i=0; i<${#s}; i++ )); do
+        char="${s:$i:1}"
+        printf -v code '%d' "'$char" 2>/dev/null || code=256
+        if (( code >= 1 && code <= 31 )); then
+            printf '\\u%04x' "$code"
+        else
+            printf '%s' "$char"
+        fi
+    done
 }
 
 check_file() { [[ -f "$1" ]] && echo "  ✓ $2" || echo "  ✗ $2"; }
@@ -173,9 +210,11 @@ resolve_template() {
     if [ -d "$presets_dir" ]; then
         local registry_file="$presets_dir/.registry"
         if [ -f "$registry_file" ] && command -v python3 >/dev/null 2>&1; then
-            # Read preset IDs sorted by priority (lower number = higher precedence)
-            local sorted_presets
-            sorted_presets=$(SPECKIT_REGISTRY="$registry_file" python3 -c "
+            # Read preset IDs sorted by priority (lower number = higher precedence).
+            # The python3 call is wrapped in an if-condition so that set -e does not
+            # abort the function when python3 exits non-zero (e.g. invalid JSON).
+            local sorted_presets=""
+            if sorted_presets=$(SPECKIT_REGISTRY="$registry_file" python3 -c "
 import json, sys, os
 try:
     with open(os.environ['SPECKIT_REGISTRY']) as f:
@@ -185,14 +224,17 @@ try:
         print(pid)
 except Exception:
     sys.exit(1)
-" 2>/dev/null)
-            if [ $? -eq 0 ] && [ -n "$sorted_presets" ]; then
-                while IFS= read -r preset_id; do
-                    local candidate="$presets_dir/$preset_id/templates/${template_name}.md"
-                    [ -f "$candidate" ] && echo "$candidate" && return 0
-                done <<< "$sorted_presets"
+" 2>/dev/null); then
+                if [ -n "$sorted_presets" ]; then
+                    # python3 succeeded and returned preset IDs — search in priority order
+                    while IFS= read -r preset_id; do
+                        local candidate="$presets_dir/$preset_id/templates/${template_name}.md"
+                        [ -f "$candidate" ] && echo "$candidate" && return 0
+                    done <<< "$sorted_presets"
+                fi
+                # python3 succeeded but registry has no presets — nothing to search
             else
-                # python3 returned empty list — fall through to directory scan
+                # python3 failed (missing, or registry parse error) — fall back to unordered directory scan
                 for preset in "$presets_dir"/*/; do
                     [ -d "$preset" ] || continue
                     local candidate="$preset/templates/${template_name}.md"
@@ -225,8 +267,9 @@ except Exception:
     local core="$base/${template_name}.md"
     [ -f "$core" ] && echo "$core" && return 0
 
-    # Return success with empty output so callers using set -e don't abort;
-    # callers check [ -n "$TEMPLATE" ] to detect "not found".
-    return 0
+    # Template not found in any location.
+    # Return 1 so callers can distinguish "not found" from "found".
+    # Callers running under set -e should use: TEMPLATE=$(resolve_template ...) || true
+    return 1
 }
 

scripts/bash/create-new-feature.sh

@@ -138,7 +138,7 @@ check_existing_branches() {
     local specs_dir="$1"
 
     # Fetch all remotes to get latest branch info (suppress errors if no remotes)
-    git fetch --all --prune 2>/dev/null || true
+    git fetch --all --prune >/dev/null 2>&1 || true
 
     # Get highest number from ALL branches (not just matching short name)
     local highest_branch=$(get_highest_from_branches)
@@ -297,18 +297,31 @@ fi
 FEATURE_DIR="$SPECS_DIR/$BRANCH_NAME"
 mkdir -p "$FEATURE_DIR"
 
-TEMPLATE=$(resolve_template "spec-template" "$REPO_ROOT")
+TEMPLATE=$(resolve_template "spec-template" "$REPO_ROOT") || true
 SPEC_FILE="$FEATURE_DIR/spec.md"
-if [ -n "$TEMPLATE" ] && [ -f "$TEMPLATE" ]; then cp "$TEMPLATE" "$SPEC_FILE"; else touch "$SPEC_FILE"; fi
+if [ -n "$TEMPLATE" ] && [ -f "$TEMPLATE" ]; then
+    cp "$TEMPLATE" "$SPEC_FILE"
+else
+    echo "Warning: Spec template not found; created empty spec file" >&2
+    touch "$SPEC_FILE"
+fi
 
-# Set the SPECIFY_FEATURE environment variable for the current session
-export SPECIFY_FEATURE="$BRANCH_NAME"
+# Inform the user how to persist the feature variable in their own shell
+printf '# To persist: export SPECIFY_FEATURE=%q\n' "$BRANCH_NAME" >&2
 
 if $JSON_MODE; then
-    printf '{"BRANCH_NAME":"%s","SPEC_FILE":"%s","FEATURE_NUM":"%s"}\n' "$BRANCH_NAME" "$SPEC_FILE" "$FEATURE_NUM"
+    if command -v jq >/dev/null 2>&1; then
+        jq -cn \
+            --arg branch_name "$BRANCH_NAME" \
+            --arg spec_file "$SPEC_FILE" \
+            --arg feature_num "$FEATURE_NUM" \
+            '{BRANCH_NAME:$branch_name,SPEC_FILE:$spec_file,FEATURE_NUM:$feature_num}'
+    else
+        printf '{"BRANCH_NAME":"%s","SPEC_FILE":"%s","FEATURE_NUM":"%s"}\n' "$(json_escape "$BRANCH_NAME")" "$(json_escape "$SPEC_FILE")" "$(json_escape "$FEATURE_NUM")"
+    fi
 else
     echo "BRANCH_NAME: $BRANCH_NAME"
     echo "SPEC_FILE: $SPEC_FILE"
     echo "FEATURE_NUM: $FEATURE_NUM"
-    echo "SPECIFY_FEATURE environment variable set to: $BRANCH_NAME"
+    printf '# To persist in your shell: export SPECIFY_FEATURE=%q\n' "$BRANCH_NAME"
 fi

scripts/bash/setup-plan.sh

@@ -28,7 +28,9 @@ SCRIPT_DIR="$(CDPATH="" cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/common.sh"
 
 # Get all paths and variables from common functions
-eval $(get_feature_paths)
+_paths_output=$(get_feature_paths) || { echo "ERROR: Failed to resolve feature paths" >&2; exit 1; }
+eval "$_paths_output"
+unset _paths_output
 
 # Check if we're on a proper feature branch (only for git repos)
 check_feature_branch "$CURRENT_BRANCH" "$HAS_GIT" || exit 1
@@ -37,7 +39,7 @@ check_feature_branch "$CURRENT_BRANCH" "$HAS_GIT" || exit 1
 mkdir -p "$FEATURE_DIR"
 
 # Copy plan template if it exists
-TEMPLATE=$(resolve_template "plan-template" "$REPO_ROOT")
+TEMPLATE=$(resolve_template "plan-template" "$REPO_ROOT") || true
 if [[ -n "$TEMPLATE" ]] && [[ -f "$TEMPLATE" ]]; then
     cp "$TEMPLATE" "$IMPL_PLAN"
     echo "Copied plan template to $IMPL_PLAN"
@@ -49,8 +51,18 @@ fi
 
 # Output results
 if $JSON_MODE; then
-    printf '{"FEATURE_SPEC":"%s","IMPL_PLAN":"%s","SPECS_DIR":"%s","BRANCH":"%s","HAS_GIT":"%s"}\n' \
-        "$FEATURE_SPEC" "$IMPL_PLAN" "$FEATURE_DIR" "$CURRENT_BRANCH" "$HAS_GIT"
+    if has_jq; then
+        jq -cn \
+            --arg feature_spec "$FEATURE_SPEC" \
+            --arg impl_plan "$IMPL_PLAN" \
+            --arg specs_dir "$FEATURE_DIR" \
+            --arg branch "$CURRENT_BRANCH" \
+            --arg has_git "$HAS_GIT" \
+            '{FEATURE_SPEC:$feature_spec,IMPL_PLAN:$impl_plan,SPECS_DIR:$specs_dir,BRANCH:$branch,HAS_GIT:$has_git}'
+    else
+        printf '{"FEATURE_SPEC":"%s","IMPL_PLAN":"%s","SPECS_DIR":"%s","BRANCH":"%s","HAS_GIT":"%s"}\n' \
+            "$(json_escape "$FEATURE_SPEC")" "$(json_escape "$IMPL_PLAN")" "$(json_escape "$FEATURE_DIR")" "$(json_escape "$CURRENT_BRANCH")" "$(json_escape "$HAS_GIT")"
+    fi
 else
     echo "FEATURE_SPEC: $FEATURE_SPEC"
     echo "IMPL_PLAN: $IMPL_PLAN" 

scripts/bash/update-agent-context.sh

@@ -30,12 +30,12 @@
 #
 # 5. Multi-Agent Support
 #    - Handles agent-specific file paths and naming conventions
-#    - Supports: Claude, Gemini, Copilot, Cursor, Qwen, opencode, Codex, Windsurf, Kilo Code, Auggie CLI, Roo Code, CodeBuddy CLI, Qoder CLI, Amp, SHAI, Tabnine CLI, Kiro CLI, Mistral Vibe, Kimi Code, Antigravity or Generic
+#    - Supports: Claude, Gemini, Copilot, Cursor, Qwen, opencode, Codex, Windsurf, Kilo Code, Auggie CLI, Roo Code, CodeBuddy CLI, Qoder CLI, Amp, SHAI, Tabnine CLI, Kiro CLI, Mistral Vibe, Kimi Code, Pi Coding Agent, iFlow CLI, Antigravity or Generic
 #    - Can update single agents or all existing agent files
 #    - Creates default Claude file if no agent files exist
 #
 # Usage: ./update-agent-context.sh [agent_type]
-# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|generic
+# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic
 # Leave empty to update all existing agent files
 
 set -e
@@ -53,7 +53,9 @@ SCRIPT_DIR="$(CDPATH="" cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 source "$SCRIPT_DIR/common.sh"
 
 # Get all paths and variables from common functions
-eval $(get_feature_paths)
+_paths_output=$(get_feature_paths) || { echo "ERROR: Failed to resolve feature paths" >&2; exit 1; }
+eval "$_paths_output"
+unset _paths_output
 
 NEW_PLAN="$IMPL_PLAN"  # Alias for compatibility with existing code
 AGENT_TYPE="${1:-}"
@@ -71,14 +73,18 @@ AUGGIE_FILE="$REPO_ROOT/.augment/rules/specify-rules.md"
 ROO_FILE="$REPO_ROOT/.roo/rules/specify-rules.md"
 CODEBUDDY_FILE="$REPO_ROOT/CODEBUDDY.md"
 QODER_FILE="$REPO_ROOT/QODER.md"
-AMP_FILE="$REPO_ROOT/AGENTS.md"
+# Amp, Kiro CLI, IBM Bob, and Pi all share AGENTS.md — use AGENTS_FILE to avoid
+# updating the same file multiple times.
+AMP_FILE="$AGENTS_FILE"
 SHAI_FILE="$REPO_ROOT/SHAI.md"
 TABNINE_FILE="$REPO_ROOT/TABNINE.md"
-KIRO_FILE="$REPO_ROOT/AGENTS.md"
+KIRO_FILE="$AGENTS_FILE"
 AGY_FILE="$REPO_ROOT/.agent/rules/specify-rules.md"
-BOB_FILE="$REPO_ROOT/AGENTS.md"
+BOB_FILE="$AGENTS_FILE"
 VIBE_FILE="$REPO_ROOT/.vibe/agents/specify-agents.md"
 KIMI_FILE="$REPO_ROOT/KIMI.md"
+TRAE_FILE="$REPO_ROOT/.trae/rules/AGENTS.md"
+IFLOW_FILE="$REPO_ROOT/IFLOW.md"
 
 # Template file
 TEMPLATE_FILE="$REPO_ROOT/.specify/templates/agent-file-template.md"
@@ -112,6 +118,8 @@ log_warning() {
 # Cleanup function for temporary files
 cleanup() {
     local exit_code=$?
+    # Disarm traps to prevent re-entrant loop
+    trap - EXIT INT TERM
     rm -f /tmp/agent_update_*_$$
     rm -f /tmp/manual_additions_$$
     exit $exit_code
@@ -476,7 +484,7 @@ update_existing_agent_file() {
         fi
         
         # Update timestamp
-        if [[ "$line" =~ \*\*Last\ updated\*\*:.*[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] ]]; then
+        if [[ "$line" =~ (\*\*)?Last\ updated(\*\*)?:.*[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9] ]]; then
             echo "$line" | sed "s/[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]/$current_date/" >> "$temp_file"
         else
             echo "$line" >> "$temp_file"
@@ -607,182 +615,151 @@ update_specific_agent() {
     
     case "$agent_type" in
         claude)
-            update_agent_file "$CLAUDE_FILE" "Claude Code"
+            update_agent_file "$CLAUDE_FILE" "Claude Code" || return 1
             ;;
         gemini)
-            update_agent_file "$GEMINI_FILE" "Gemini CLI"
+            update_agent_file "$GEMINI_FILE" "Gemini CLI" || return 1
             ;;
         copilot)
-            update_agent_file "$COPILOT_FILE" "GitHub Copilot"
+            update_agent_file "$COPILOT_FILE" "GitHub Copilot" || return 1
             ;;
         cursor-agent)
-            update_agent_file "$CURSOR_FILE" "Cursor IDE"
+            update_agent_file "$CURSOR_FILE" "Cursor IDE" || return 1
             ;;
         qwen)
-            update_agent_file "$QWEN_FILE" "Qwen Code"
+            update_agent_file "$QWEN_FILE" "Qwen Code" || return 1
             ;;
         opencode)
-            update_agent_file "$AGENTS_FILE" "opencode"
+            update_agent_file "$AGENTS_FILE" "opencode" || return 1
             ;;
         codex)
-            update_agent_file "$AGENTS_FILE" "Codex CLI"
+            update_agent_file "$AGENTS_FILE" "Codex CLI" || return 1
             ;;
         windsurf)
-            update_agent_file "$WINDSURF_FILE" "Windsurf"
+            update_agent_file "$WINDSURF_FILE" "Windsurf" || return 1
             ;;
         kilocode)
-            update_agent_file "$KILOCODE_FILE" "Kilo Code"
+            update_agent_file "$KILOCODE_FILE" "Kilo Code" || return 1
             ;;
         auggie)
-            update_agent_file "$AUGGIE_FILE" "Auggie CLI"
+            update_agent_file "$AUGGIE_FILE" "Auggie CLI" || return 1
             ;;
         roo)
-            update_agent_file "$ROO_FILE" "Roo Code"
+            update_agent_file "$ROO_FILE" "Roo Code" || return 1
             ;;
         codebuddy)
-            update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI"
+            update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI" || return 1
             ;;
         qodercli)
-            update_agent_file "$QODER_FILE" "Qoder CLI"
+            update_agent_file "$QODER_FILE" "Qoder CLI" || return 1
             ;;
         amp)
-            update_agent_file "$AMP_FILE" "Amp"
+            update_agent_file "$AMP_FILE" "Amp" || return 1
             ;;
         shai)
-            update_agent_file "$SHAI_FILE" "SHAI"
+            update_agent_file "$SHAI_FILE" "SHAI" || return 1
             ;;
         tabnine)
-            update_agent_file "$TABNINE_FILE" "Tabnine CLI"
+            update_agent_file "$TABNINE_FILE" "Tabnine CLI" || return 1
             ;;
         kiro-cli)
-            update_agent_file "$KIRO_FILE" "Kiro CLI"
+            update_agent_file "$KIRO_FILE" "Kiro CLI" || return 1
             ;;
         agy)
-            update_agent_file "$AGY_FILE" "Antigravity"
+            update_agent_file "$AGY_FILE" "Antigravity" || return 1
             ;;
         bob)
-            update_agent_file "$BOB_FILE" "IBM Bob"
+            update_agent_file "$BOB_FILE" "IBM Bob" || return 1
             ;;
         vibe)
-            update_agent_file "$VIBE_FILE" "Mistral Vibe"
+            update_agent_file "$VIBE_FILE" "Mistral Vibe" || return 1
             ;;
         kimi)
-            update_agent_file "$KIMI_FILE" "Kimi Code"
+            update_agent_file "$KIMI_FILE" "Kimi Code" || return 1
+            ;;
+        trae)
+            update_agent_file "$TRAE_FILE" "Trae" || return 1
+            ;;
+        pi)
+            update_agent_file "$AGENTS_FILE" "Pi Coding Agent" || return 1
+            ;;
+        iflow)
+            update_agent_file "$IFLOW_FILE" "iFlow CLI" || return 1
             ;;
         generic)
             log_info "Generic agent: no predefined context file. Use the agent-specific update script for your agent."
             ;;
         *)
             log_error "Unknown agent type '$agent_type'"
-            log_error "Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|generic"
+            log_error "Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic"
             exit 1
             ;;
     esac
 }
 
+# Helper: skip non-existent files and files already updated (dedup by
+# realpath so that variables pointing to the same file — e.g. AMP_FILE,
+# KIRO_FILE, BOB_FILE all resolving to AGENTS_FILE — are only written once).
+# Uses a linear array instead of associative array for bash 3.2 compatibility.
+# Note: defined at top level because bash 3.2 does not support true
+# nested/local functions. _updated_paths, _found_agent, and _all_ok are
+# initialised exclusively inside update_all_existing_agents so that
+# sourcing this script has no side effects on the caller's environment.
+
+_update_if_new() {
+    local file="$1" name="$2"
+    [[ -f "$file" ]] || return 0
+    local real_path
+    real_path=$(realpath "$file" 2>/dev/null || echo "$file")
+    local p
+    if [[ ${#_updated_paths[@]} -gt 0 ]]; then
+        for p in "${_updated_paths[@]}"; do
+            [[ "$p" == "$real_path" ]] && return 0
+        done
+    fi
+    # Record the file as seen before attempting the update so that:
+    # (a) aliases pointing to the same path are not retried on failure
+    # (b) _found_agent reflects file existence, not update success
+    _updated_paths+=("$real_path")
+    _found_agent=true
+    update_agent_file "$file" "$name"
+}
+
 update_all_existing_agents() {
-    local found_agent=false
-    
-    # Check each possible agent file and update if it exists
-    if [[ -f "$CLAUDE_FILE" ]]; then
-        update_agent_file "$CLAUDE_FILE" "Claude Code"
-        found_agent=true
-    fi
-    
-    if [[ -f "$GEMINI_FILE" ]]; then
-        update_agent_file "$GEMINI_FILE" "Gemini CLI"
-        found_agent=true
-    fi
-    
-    if [[ -f "$COPILOT_FILE" ]]; then
-        update_agent_file "$COPILOT_FILE" "GitHub Copilot"
-        found_agent=true
-    fi
-    
-    if [[ -f "$CURSOR_FILE" ]]; then
-        update_agent_file "$CURSOR_FILE" "Cursor IDE"
-        found_agent=true
-    fi
-    
-    if [[ -f "$QWEN_FILE" ]]; then
-        update_agent_file "$QWEN_FILE" "Qwen Code"
-        found_agent=true
-    fi
-    
-    if [[ -f "$AGENTS_FILE" ]]; then
-        update_agent_file "$AGENTS_FILE" "Codex/opencode"
-        found_agent=true
-    fi
-    
-    if [[ -f "$WINDSURF_FILE" ]]; then
-        update_agent_file "$WINDSURF_FILE" "Windsurf"
-        found_agent=true
-    fi
-    
-    if [[ -f "$KILOCODE_FILE" ]]; then
-        update_agent_file "$KILOCODE_FILE" "Kilo Code"
-        found_agent=true
-    fi
+    _found_agent=false
+    _updated_paths=()
+    local _all_ok=true
 
-    if [[ -f "$AUGGIE_FILE" ]]; then
-        update_agent_file "$AUGGIE_FILE" "Auggie CLI"
-        found_agent=true
-    fi
-    
-    if [[ -f "$ROO_FILE" ]]; then
-        update_agent_file "$ROO_FILE" "Roo Code"
-        found_agent=true
-    fi
+    _update_if_new "$CLAUDE_FILE" "Claude Code"           || _all_ok=false
+    _update_if_new "$GEMINI_FILE" "Gemini CLI"             || _all_ok=false
+    _update_if_new "$COPILOT_FILE" "GitHub Copilot"        || _all_ok=false
+    _update_if_new "$CURSOR_FILE" "Cursor IDE"             || _all_ok=false
+    _update_if_new "$QWEN_FILE" "Qwen Code"                || _all_ok=false
+    _update_if_new "$AGENTS_FILE" "Codex/opencode"         || _all_ok=false
+    _update_if_new "$AMP_FILE" "Amp"                       || _all_ok=false
+    _update_if_new "$KIRO_FILE" "Kiro CLI"                 || _all_ok=false
+    _update_if_new "$BOB_FILE" "IBM Bob"                   || _all_ok=false
+    _update_if_new "$WINDSURF_FILE" "Windsurf"             || _all_ok=false
+    _update_if_new "$KILOCODE_FILE" "Kilo Code"            || _all_ok=false
+    _update_if_new "$AUGGIE_FILE" "Auggie CLI"             || _all_ok=false
+    _update_if_new "$ROO_FILE" "Roo Code"                  || _all_ok=false
+    _update_if_new "$CODEBUDDY_FILE" "CodeBuddy CLI"       || _all_ok=false
+    _update_if_new "$SHAI_FILE" "SHAI"                     || _all_ok=false
+    _update_if_new "$TABNINE_FILE" "Tabnine CLI"           || _all_ok=false
+    _update_if_new "$QODER_FILE" "Qoder CLI"               || _all_ok=false
+    _update_if_new "$AGY_FILE" "Antigravity"               || _all_ok=false
+    _update_if_new "$VIBE_FILE" "Mistral Vibe"             || _all_ok=false
+    _update_if_new "$KIMI_FILE" "Kimi Code"                || _all_ok=false
+    _update_if_new "$TRAE_FILE" "Trae"                     || _all_ok=false
+    _update_if_new "$IFLOW_FILE" "iFlow CLI"               || _all_ok=false
 
-    if [[ -f "$CODEBUDDY_FILE" ]]; then
-        update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI"
-        found_agent=true
-    fi
-
-    if [[ -f "$SHAI_FILE" ]]; then
-        update_agent_file "$SHAI_FILE" "SHAI"
-        found_agent=true
-    fi
-
-    if [[ -f "$TABNINE_FILE" ]]; then
-        update_agent_file "$TABNINE_FILE" "Tabnine CLI"
-        found_agent=true
-    fi
-
-    if [[ -f "$QODER_FILE" ]]; then
-        update_agent_file "$QODER_FILE" "Qoder CLI"
-        found_agent=true
-    fi
-
-    if [[ -f "$KIRO_FILE" ]]; then
-        update_agent_file "$KIRO_FILE" "Kiro CLI"
-        found_agent=true
-    fi
-
-    if [[ -f "$AGY_FILE" ]]; then
-        update_agent_file "$AGY_FILE" "Antigravity"
-        found_agent=true
-    fi
-    if [[ -f "$BOB_FILE" ]]; then
-        update_agent_file "$BOB_FILE" "IBM Bob"
-        found_agent=true
-    fi
-
-    if [[ -f "$VIBE_FILE" ]]; then
-        update_agent_file "$VIBE_FILE" "Mistral Vibe"
-        found_agent=true
-    fi
-    
-    if [[ -f "$KIMI_FILE" ]]; then
-        update_agent_file "$KIMI_FILE" "Kimi Code"
-        found_agent=true
-    fi
-    
     # If no agent files exist, create a default Claude file
-    if [[ "$found_agent" == false ]]; then
+    if [[ "$_found_agent" == false ]]; then
         log_info "No existing agent files found, creating default Claude file..."
-        update_agent_file "$CLAUDE_FILE" "Claude Code"
+        update_agent_file "$CLAUDE_FILE" "Claude Code" || return 1
     fi
+
+    [[ "$_all_ok" == true ]]
 }
 print_summary() {
     echo
@@ -801,7 +778,7 @@ print_summary() {
     fi
     
     echo
-    log_info "Usage: $0 [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|generic]"
+    log_info "Usage: $0 [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic]"
 }
 
 #==============================================================================

scripts/powershell/create-new-feature.ps1

@@ -4,9 +4,10 @@
 param(
     [switch]$Json,
     [string]$ShortName,
+    [Parameter()]
     [int]$Number = 0,
     [switch]$Help,
-    [Parameter(ValueFromRemainingArguments = $true)]
+    [Parameter(Position = 0, ValueFromRemainingArguments = $true)]
     [string[]]$FeatureDescription
 )
 $ErrorActionPreference = 'Stop'

scripts/powershell/update-agent-context.ps1

@@ -9,7 +9,7 @@ Mirrors the behavior of scripts/bash/update-agent-context.sh:
  2. Plan Data Extraction
  3. Agent File Management (create from template or update existing)
  4. Content Generation (technology stack, recent changes, timestamp)
- 5. Multi-Agent Support (claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, roo, codebuddy, amp, shai, tabnine, kiro-cli, agy, bob, vibe, qodercli, kimi, generic)
+ 5. Multi-Agent Support (claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, roo, codebuddy, amp, shai, tabnine, kiro-cli, agy, bob, vibe, qodercli, kimi, trae, pi, iflow, generic)
 
 .PARAMETER AgentType
 Optional agent key to update a single agent. If omitted, updates all existing agent files (creating a default Claude file if none exist).
@@ -25,7 +25,7 @@ Relies on common helper functions in common.ps1
 #>
 param(
     [Parameter(Position=0)]
-    [ValidateSet('claude','gemini','copilot','cursor-agent','qwen','opencode','codex','windsurf','kilocode','auggie','roo','codebuddy','amp','shai','tabnine','kiro-cli','agy','bob','qodercli','vibe','kimi','generic')]
+    [ValidateSet('claude','gemini','copilot','cursor-agent','qwen','opencode','codex','windsurf','kilocode','auggie','roo','codebuddy','amp','shai','tabnine','kiro-cli','agy','bob','qodercli','vibe','kimi','trae','pi','iflow','generic')]
     [string]$AgentType
 )
 
@@ -64,6 +64,8 @@ $AGY_FILE      = Join-Path $REPO_ROOT '.agent/rules/specify-rules.md'
 $BOB_FILE      = Join-Path $REPO_ROOT 'AGENTS.md'
 $VIBE_FILE     = Join-Path $REPO_ROOT '.vibe/agents/specify-agents.md'
 $KIMI_FILE     = Join-Path $REPO_ROOT 'KIMI.md'
+$TRAE_FILE     = Join-Path $REPO_ROOT '.trae/rules/AGENTS.md'
+$IFLOW_FILE    = Join-Path $REPO_ROOT 'IFLOW.md'
 
 $TEMPLATE_FILE = Join-Path $REPO_ROOT '.specify/templates/agent-file-template.md'
 
@@ -331,7 +333,7 @@ function Update-ExistingAgentFile {
             if ($existingChanges -lt 2) { $output.Add($line); $existingChanges++ }
             continue
         }
-        if ($line -match '\*\*Last updated\*\*: .*\d{4}-\d{2}-\d{2}') {
+        if ($line -match '(\*\*)?Last updated(\*\*)?: .*\d{4}-\d{2}-\d{2}') {
             $output.Add(($line -replace '\d{4}-\d{2}-\d{2}',$Date.ToString('yyyy-MM-dd')))
             continue
         }
@@ -408,8 +410,11 @@ function Update-SpecificAgent {
         'bob'      { Update-AgentFile -TargetFile $BOB_FILE      -AgentName 'IBM Bob' }
         'vibe'     { Update-AgentFile -TargetFile $VIBE_FILE     -AgentName 'Mistral Vibe' }
         'kimi'     { Update-AgentFile -TargetFile $KIMI_FILE     -AgentName 'Kimi Code' }
+        'trae'     { Update-AgentFile -TargetFile $TRAE_FILE     -AgentName 'Trae' }
+        'pi'       { Update-AgentFile -TargetFile $AGENTS_FILE   -AgentName 'Pi Coding Agent' }
+        'iflow'    { Update-AgentFile -TargetFile $IFLOW_FILE    -AgentName 'iFlow CLI' }
         'generic'  { Write-Info 'Generic agent: no predefined context file. Use the agent-specific update script for your agent.' }
-        default { Write-Err "Unknown agent type '$Type'"; Write-Err 'Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|generic'; return $false }
+        default { Write-Err "Unknown agent type '$Type'"; Write-Err 'Expected: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic'; return $false }
     }
 }
 
@@ -435,6 +440,8 @@ function Update-AllExistingAgents {
     if (Test-Path $BOB_FILE)      { if (-not (Update-AgentFile -TargetFile $BOB_FILE      -AgentName 'IBM Bob')) { $ok = $false }; $found = $true }
     if (Test-Path $VIBE_FILE)     { if (-not (Update-AgentFile -TargetFile $VIBE_FILE     -AgentName 'Mistral Vibe')) { $ok = $false }; $found = $true }
     if (Test-Path $KIMI_FILE)     { if (-not (Update-AgentFile -TargetFile $KIMI_FILE     -AgentName 'Kimi Code')) { $ok = $false }; $found = $true }
+    if (Test-Path $TRAE_FILE)     { if (-not (Update-AgentFile -TargetFile $TRAE_FILE     -AgentName 'Trae')) { $ok = $false }; $found = $true }
+    if (Test-Path $IFLOW_FILE)    { if (-not (Update-AgentFile -TargetFile $IFLOW_FILE    -AgentName 'iFlow CLI')) { $ok = $false }; $found = $true }
     if (-not $found) {
         Write-Info 'No existing agent files found, creating default Claude file...'
         if (-not (Update-AgentFile -TargetFile $CLAUDE_FILE -AgentName 'Claude Code')) { $ok = $false }
@@ -449,7 +456,7 @@ function Print-Summary {
     if ($NEW_FRAMEWORK) { Write-Host "  - Added framework: $NEW_FRAMEWORK" }
     if ($NEW_DB -and $NEW_DB -ne 'N/A') { Write-Host "  - Added database: $NEW_DB" }
     Write-Host ''
-    Write-Info 'Usage: ./update-agent-context.ps1 [-AgentType claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|generic]'
+    Write-Info 'Usage: ./update-agent-context.ps1 [-AgentType claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|roo|codebuddy|amp|shai|tabnine|kiro-cli|agy|bob|vibe|qodercli|kimi|trae|pi|iflow|generic]'
 }
 
 function Main {

src/specify_cli/__init__.py

@@ -7,6 +7,7 @@
 #     "platformdirs",
 #     "readchar",
 #     "httpx",
+#     "json5",
 # ]
 # ///
 """
@@ -32,6 +33,8 @@ import tempfile
 import shutil
 import shlex
 import json
+import json5
+import stat
 import yaml
 from pathlib import Path
 from typing import Any, Optional, Tuple
@@ -272,6 +275,27 @@ AGENT_CONFIG = {
         "install_url": "https://code.kimi.com/",
         "requires_cli": True,
     },
+    "trae": {
+        "name": "Trae",
+        "folder": ".trae/",
+        "commands_subdir": "rules",  # Trae uses .trae/rules/ for project rules
+        "install_url": None,  # IDE-based
+        "requires_cli": False,
+    },
+    "pi": {
+        "name": "Pi Coding Agent",
+        "folder": ".pi/",
+        "commands_subdir": "prompts",
+        "install_url": "https://www.npmjs.com/package/@mariozechner/pi-coding-agent",
+        "requires_cli": True,
+    },
+    "iflow": {
+        "name": "iFlow CLI",
+        "folder": ".iflow/",
+        "commands_subdir": "commands",
+        "install_url": "https://docs.iflow.cn/en/cli/quickstart",
+        "requires_cli": True,
+    },
     "generic": {
         "name": "Generic (bring your own agent)",
         "folder": None,  # Set dynamically via --ai-commands-dir
@@ -654,37 +678,82 @@ def init_git_repo(project_path: Path, quiet: bool = False) -> Tuple[bool, Option
         os.chdir(original_cwd)
 
 def handle_vscode_settings(sub_item, dest_file, rel_path, verbose=False, tracker=None) -> None:
-    """Handle merging or copying of .vscode/settings.json files."""
+    """Handle merging or copying of .vscode/settings.json files.
+
+    Note: when merge produces changes, rewritten output is normalized JSON and
+    existing JSONC comments/trailing commas are not preserved.
+    """
     def log(message, color="green"):
         if verbose and not tracker:
             console.print(f"[{color}]{message}[/] {rel_path}")
 
+    def atomic_write_json(target_file: Path, payload: dict[str, Any]) -> None:
+        """Atomically write JSON while preserving existing mode bits when possible."""
+        temp_path: Optional[Path] = None
+        try:
+            with tempfile.NamedTemporaryFile(
+                mode='w',
+                encoding='utf-8',
+                dir=target_file.parent,
+                prefix=f"{target_file.name}.",
+                suffix=".tmp",
+                delete=False,
+            ) as f:
+                temp_path = Path(f.name)
+                json.dump(payload, f, indent=4)
+                f.write('\n')
+
+            if target_file.exists():
+                try:
+                    existing_stat = target_file.stat()
+                    os.chmod(temp_path, stat.S_IMODE(existing_stat.st_mode))
+                    if hasattr(os, "chown"):
+                        try:
+                            os.chown(temp_path, existing_stat.st_uid, existing_stat.st_gid)
+                        except PermissionError:
+                            # Best-effort owner/group preservation without requiring elevated privileges.
+                            pass
+                except OSError:
+                    # Best-effort metadata preservation; data safety is prioritized.
+                    pass
+
+            os.replace(temp_path, target_file)
+        except Exception:
+            if temp_path and temp_path.exists():
+                temp_path.unlink()
+            raise
+
     try:
         with open(sub_item, 'r', encoding='utf-8') as f:
-            new_settings = json.load(f)
+            # json5 natively supports comments and trailing commas (JSONC)
+            new_settings = json5.load(f)
 
         if dest_file.exists():
             merged = merge_json_files(dest_file, new_settings, verbose=verbose and not tracker)
-            with open(dest_file, 'w', encoding='utf-8') as f:
-                json.dump(merged, f, indent=4)
-                f.write('\n')
-            log("Merged:", "green")
+            if merged is not None:
+                atomic_write_json(dest_file, merged)
+                log("Merged:", "green")
+                log("Note: comments/trailing commas are normalized when rewritten", "yellow")
+            else:
+                log("Skipped merge (preserved existing settings)", "yellow")
         else:
             shutil.copy2(sub_item, dest_file)
             log("Copied (no existing settings.json):", "blue")
 
     except Exception as e:
-        log(f"Warning: Could not merge, copying instead: {e}", "yellow")
-        shutil.copy2(sub_item, dest_file)
+        log(f"Warning: Could not merge settings: {e}", "yellow")
+        if not dest_file.exists():
+            shutil.copy2(sub_item, dest_file)
 
-def merge_json_files(existing_path: Path, new_content: dict, verbose: bool = False) -> dict:
+
+def merge_json_files(existing_path: Path, new_content: Any, verbose: bool = False) -> Optional[dict[str, Any]]:
     """Merge new JSON content into existing JSON file.
 
-    Performs a deep merge where:
+    Performs a polite deep merge where:
     - New keys are added
-    - Existing keys are preserved unless overwritten by new content
-    - Nested dictionaries are merged recursively
-    - Lists and other values are replaced (not merged)
+    - Existing keys are preserved (not overwritten) unless both values are dictionaries
+    - Nested dictionaries are merged recursively only when both sides are dictionaries
+    - Lists and other values are preserved from base if they exist
 
     Args:
         existing_path: Path to existing JSON file
@@ -692,28 +761,64 @@ def merge_json_files(existing_path: Path, new_content: dict, verbose: bool = Fal
         verbose: Whether to print merge details
 
     Returns:
-        Merged JSON content as dict
+        Merged JSON content as dict, or None if the existing file should be left untouched.
     """
-    try:
-        with open(existing_path, 'r', encoding='utf-8') as f:
-            existing_content = json.load(f)
-    except (FileNotFoundError, json.JSONDecodeError):
-        # If file doesn't exist or is invalid, just use new content
+    # Load existing content first to have a safe fallback
+    existing_content = None
+    exists = existing_path.exists()
+
+    if exists:
+        try:
+            with open(existing_path, 'r', encoding='utf-8') as f:
+                # Handle comments (JSONC) natively with json5
+                # Note: json5 handles BOM automatically
+                existing_content = json5.load(f)
+        except FileNotFoundError:
+            # Handle race condition where file is deleted after exists() check
+            exists = False
+        except Exception as e:
+            if verbose:
+                console.print(f"[yellow]Warning: Could not read or parse existing JSON in {existing_path.name} ({e}).[/yellow]")
+            # Skip merge to preserve existing file if unparseable or inaccessible (e.g. PermissionError)
+            return None
+
+    # Validate template content
+    if not isinstance(new_content, dict):
+        if verbose:
+            console.print(f"[yellow]Warning: Template content for {existing_path.name} is not a dictionary. Preserving existing settings.[/yellow]")
+        return None
+
+    if not exists:
         return new_content
 
-    def deep_merge(base: dict, update: dict) -> dict:
-        """Recursively merge update dict into base dict."""
+    # If existing content parsed but is not a dict, skip merge to avoid data loss
+    if not isinstance(existing_content, dict):
+        if verbose:
+            console.print(f"[yellow]Warning: Existing JSON in {existing_path.name} is not an object. Skipping merge to avoid data loss.[/yellow]")
+        return None
+
+    def deep_merge_polite(base: dict[str, Any], update: dict[str, Any]) -> dict[str, Any]:
+        """Recursively merge update dict into base dict, preserving base values."""
         result = base.copy()
         for key, value in update.items():
-            if key in result and isinstance(result[key], dict) and isinstance(value, dict):
-                # Recursively merge nested dictionaries
-                result[key] = deep_merge(result[key], value)
-            else:
-                # Add new key or replace existing value
+            if key not in result:
+                # Add new key
                 result[key] = value
+            elif isinstance(result[key], dict) and isinstance(value, dict):
+                # Recursively merge nested dictionaries
+                result[key] = deep_merge_polite(result[key], value)
+            else:
+                # Key already exists and values are not both dicts; preserve existing value.
+                # This ensures user settings aren't overwritten by template defaults.
+                pass
         return result
 
-    merged = deep_merge(existing_content, new_content)
+    merged = deep_merge_polite(existing_content, new_content)
+
+    # Detect if anything actually changed. If not, return None so the caller
+    # can skip rewriting the file (preserving user's comments/formatting).
+    if merged == existing_content:
+        return None
 
     if verbose:
         console.print(f"[cyan]Merged JSON file:[/cyan] {existing_path.name}")
@@ -1165,7 +1270,12 @@ def install_ai_skills(project_path: Path, selected_ai: str, tracker: StepTracker
     else:
         templates_dir = project_path / commands_subdir
 
-    if not templates_dir.exists() or not any(templates_dir.glob("*.md")):
+    # Only consider speckit.*.md templates so that user-authored command
+    # files (e.g. custom slash commands, agent files) coexisting in the
+    # same commands directory are not incorrectly converted into skills.
+    template_glob = "speckit.*.md"
+
+    if not templates_dir.exists() or not any(templates_dir.glob(template_glob)):
         # Fallback: try the repo-relative path (for running from source checkout)
         # This also covers agents whose extracted commands are in a different
         # format (e.g. gemini/tabnine use .toml, not .md).
@@ -1173,15 +1283,16 @@ def install_ai_skills(project_path: Path, selected_ai: str, tracker: StepTracker
         fallback_dir = script_dir / "templates" / "commands"
         if fallback_dir.exists() and any(fallback_dir.glob("*.md")):
             templates_dir = fallback_dir
+            template_glob = "*.md"
 
-    if not templates_dir.exists() or not any(templates_dir.glob("*.md")):
+    if not templates_dir.exists() or not any(templates_dir.glob(template_glob)):
         if tracker:
             tracker.error("ai-skills", "command templates not found")
         else:
             console.print("[yellow]Warning: command templates not found, skipping skills installation[/yellow]")
         return False
 
-    command_files = sorted(templates_dir.glob("*.md"))
+    command_files = sorted(templates_dir.glob(template_glob))
     if not command_files:
         if tracker:
             tracker.skip("ai-skills", "no command templates found")
@@ -1220,11 +1331,14 @@ def install_ai_skills(project_path: Path, selected_ai: str, tracker: StepTracker
                 body = content
 
             command_name = command_file.stem
-            # Normalize: extracted commands may be named "speckit.<cmd>.md";
-            # strip the "speckit." prefix so skill names stay clean and
+            # Normalize: extracted commands may be named "speckit.<cmd>.md"
+            # or "speckit.<cmd>.agent.md"; strip the "speckit." prefix and
+            # any trailing ".agent" suffix so skill names stay clean and
             # SKILL_DESCRIPTIONS lookups work.
             if command_name.startswith("speckit."):
                 command_name = command_name[len("speckit."):]
+            if command_name.endswith(".agent"):
+                command_name = command_name[:-len(".agent")]
             # Kimi CLI discovers skills by directory name and invokes them as
             # /skill:<name> — use dot separator to match packaging convention.
             if selected_ai == "kimi":
@@ -1249,6 +1363,8 @@ def install_ai_skills(project_path: Path, selected_ai: str, tracker: StepTracker
             source_name = command_file.name
             if source_name.startswith("speckit."):
                 source_name = source_name[len("speckit."):]
+            if source_name.endswith(".agent.md"):
+                source_name = source_name[:-len(".agent.md")] + ".md"
 
             frontmatter_data = {
                 "name": skill_name,
@@ -2000,6 +2116,11 @@ def preset_add(
         console.print("Run this command from a spec-kit project root")
         raise typer.Exit(1)
 
+    # Validate priority
+    if priority < 1:
+        console.print("[red]Error:[/red] Priority must be a positive integer (1 or higher)")
+        raise typer.Exit(1)
+
     manager = PresetManager(project_root)
     speckit_version = get_speckit_version()
 
@@ -2177,6 +2298,7 @@ def preset_info(
     pack_id: str = typer.Argument(..., help="Preset ID to get info about"),
 ):
     """Show detailed information about a preset."""
+    from .extensions import normalize_priority
     from .presets import PresetCatalog, PresetManager, PresetError
 
     project_root = Path.cwd()
@@ -2210,6 +2332,10 @@ def preset_info(
         if license_val:
             console.print(f"  License:     {license_val}")
         console.print("\n  [green]Status: installed[/green]")
+        # Get priority from registry
+        pack_metadata = manager.registry.get(pack_id)
+        priority = normalize_priority(pack_metadata.get("priority") if isinstance(pack_metadata, dict) else None)
+        console.print(f"  [dim]Priority:[/dim] {priority}")
         console.print()
         return
 
@@ -2241,6 +2367,141 @@ def preset_info(
     console.print()
 
 
+@preset_app.command("set-priority")
+def preset_set_priority(
+    pack_id: str = typer.Argument(help="Preset ID"),
+    priority: int = typer.Argument(help="New priority (lower = higher precedence)"),
+):
+    """Set the resolution priority of an installed preset."""
+    from .presets import PresetManager
+
+    project_root = Path.cwd()
+
+    # Check if we're in a spec-kit project
+    specify_dir = project_root / ".specify"
+    if not specify_dir.exists():
+        console.print("[red]Error:[/red] Not a spec-kit project (no .specify/ directory)")
+        console.print("Run this command from a spec-kit project root")
+        raise typer.Exit(1)
+
+    # Validate priority
+    if priority < 1:
+        console.print("[red]Error:[/red] Priority must be a positive integer (1 or higher)")
+        raise typer.Exit(1)
+
+    manager = PresetManager(project_root)
+
+    # Check if preset is installed
+    if not manager.registry.is_installed(pack_id):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' is not installed")
+        raise typer.Exit(1)
+
+    # Get current metadata
+    metadata = manager.registry.get(pack_id)
+    if metadata is None or not isinstance(metadata, dict):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' not found in registry (corrupted state)")
+        raise typer.Exit(1)
+
+    from .extensions import normalize_priority
+    raw_priority = metadata.get("priority")
+    # Only skip if the stored value is already a valid int equal to requested priority
+    # This ensures corrupted values (e.g., "high") get repaired even when setting to default (10)
+    if isinstance(raw_priority, int) and raw_priority == priority:
+        console.print(f"[yellow]Preset '{pack_id}' already has priority {priority}[/yellow]")
+        raise typer.Exit(0)
+
+    old_priority = normalize_priority(raw_priority)
+
+    # Update priority
+    manager.registry.update(pack_id, {"priority": priority})
+
+    console.print(f"[green]✓[/green] Preset '{pack_id}' priority changed: {old_priority} → {priority}")
+    console.print("\n[dim]Lower priority = higher precedence in template resolution[/dim]")
+
+
+@preset_app.command("enable")
+def preset_enable(
+    pack_id: str = typer.Argument(help="Preset ID to enable"),
+):
+    """Enable a disabled preset."""
+    from .presets import PresetManager
+
+    project_root = Path.cwd()
+
+    # Check if we're in a spec-kit project
+    specify_dir = project_root / ".specify"
+    if not specify_dir.exists():
+        console.print("[red]Error:[/red] Not a spec-kit project (no .specify/ directory)")
+        console.print("Run this command from a spec-kit project root")
+        raise typer.Exit(1)
+
+    manager = PresetManager(project_root)
+
+    # Check if preset is installed
+    if not manager.registry.is_installed(pack_id):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' is not installed")
+        raise typer.Exit(1)
+
+    # Get current metadata
+    metadata = manager.registry.get(pack_id)
+    if metadata is None or not isinstance(metadata, dict):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' not found in registry (corrupted state)")
+        raise typer.Exit(1)
+
+    if metadata.get("enabled", True):
+        console.print(f"[yellow]Preset '{pack_id}' is already enabled[/yellow]")
+        raise typer.Exit(0)
+
+    # Enable the preset
+    manager.registry.update(pack_id, {"enabled": True})
+
+    console.print(f"[green]✓[/green] Preset '{pack_id}' enabled")
+    console.print("\nTemplates from this preset will now be included in resolution.")
+    console.print("[dim]Note: Previously registered commands/skills remain active.[/dim]")
+
+
+@preset_app.command("disable")
+def preset_disable(
+    pack_id: str = typer.Argument(help="Preset ID to disable"),
+):
+    """Disable a preset without removing it."""
+    from .presets import PresetManager
+
+    project_root = Path.cwd()
+
+    # Check if we're in a spec-kit project
+    specify_dir = project_root / ".specify"
+    if not specify_dir.exists():
+        console.print("[red]Error:[/red] Not a spec-kit project (no .specify/ directory)")
+        console.print("Run this command from a spec-kit project root")
+        raise typer.Exit(1)
+
+    manager = PresetManager(project_root)
+
+    # Check if preset is installed
+    if not manager.registry.is_installed(pack_id):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' is not installed")
+        raise typer.Exit(1)
+
+    # Get current metadata
+    metadata = manager.registry.get(pack_id)
+    if metadata is None or not isinstance(metadata, dict):
+        console.print(f"[red]Error:[/red] Preset '{pack_id}' not found in registry (corrupted state)")
+        raise typer.Exit(1)
+
+    if not metadata.get("enabled", True):
+        console.print(f"[yellow]Preset '{pack_id}' is already disabled[/yellow]")
+        raise typer.Exit(0)
+
+    # Disable the preset
+    manager.registry.update(pack_id, {"enabled": False})
+
+    console.print(f"[green]✓[/green] Preset '{pack_id}' disabled")
+    console.print("\nTemplates from this preset will be skipped during resolution.")
+    console.print("[dim]Note: Previously registered commands/skills remain active until preset removal.[/dim]")
+    console.print(f"To re-enable: specify preset enable {pack_id}")
+
+
 # ===== Preset Catalog Commands =====
 
 
@@ -2576,8 +2837,9 @@ def extension_list(
             status_color = "green" if ext["enabled"] else "red"
 
             console.print(f"  [{status_color}]{status_icon}[/{status_color}] [bold]{ext['name']}[/bold] (v{ext['version']})")
+            console.print(f"     [dim]{ext['id']}[/dim]")
             console.print(f"     {ext['description']}")
-            console.print(f"     Commands: {ext['command_count']} | Hooks: {ext['hook_count']} | Status: {'Enabled' if ext['enabled'] else 'Disabled'}")
+            console.print(f"     Commands: {ext['command_count']} | Hooks: {ext['hook_count']} | Priority: {ext['priority']} | Status: {'Enabled' if ext['enabled'] else 'Disabled'}")
             console.print()
 
     if available or all_extensions:
@@ -2765,6 +3027,7 @@ def extension_add(
     extension: str = typer.Argument(help="Extension name or path"),
     dev: bool = typer.Option(False, "--dev", help="Install from local directory"),
     from_url: Optional[str] = typer.Option(None, "--from", help="Install from custom URL"),
+    priority: int = typer.Option(10, "--priority", help="Resolution priority (lower = higher precedence, default 10)"),
 ):
     """Install an extension."""
     from .extensions import ExtensionManager, ExtensionCatalog, ExtensionError, ValidationError, CompatibilityError
@@ -2778,6 +3041,11 @@ def extension_add(
         console.print("Run this command from a spec-kit project root")
         raise typer.Exit(1)
 
+    # Validate priority
+    if priority < 1:
+        console.print("[red]Error:[/red] Priority must be a positive integer (1 or higher)")
+        raise typer.Exit(1)
+
     manager = ExtensionManager(project_root)
     speckit_version = get_speckit_version()
 
@@ -2794,7 +3062,7 @@ def extension_add(
                     console.print(f"[red]Error:[/red] No extension.yml found in {source_path}")
                     raise typer.Exit(1)
 
-                manifest = manager.install_from_directory(source_path, speckit_version)
+                manifest = manager.install_from_directory(source_path, speckit_version, priority=priority)
 
             elif from_url:
                 # Install from URL (ZIP file)
@@ -2827,7 +3095,7 @@ def extension_add(
                     zip_path.write_bytes(zip_data)
 
                     # Install from downloaded ZIP
-                    manifest = manager.install_from_zip(zip_path, speckit_version)
+                    manifest = manager.install_from_zip(zip_path, speckit_version, priority=priority)
                 except urllib.error.URLError as e:
                     console.print(f"[red]Error:[/red] Failed to download from {from_url}: {e}")
                     raise typer.Exit(1)
@@ -2871,7 +3139,7 @@ def extension_add(
 
                 try:
                     # Install from downloaded ZIP
-                    manifest = manager.install_from_zip(zip_path, speckit_version)
+                    manifest = manager.install_from_zip(zip_path, speckit_version, priority=priority)
                 finally:
                     # Clean up downloaded ZIP
                     if zip_path.exists():
@@ -3047,7 +3315,7 @@ def extension_info(
     extension: str = typer.Argument(help="Extension ID or name"),
 ):
     """Show detailed information about an extension."""
-    from .extensions import ExtensionCatalog, ExtensionManager
+    from .extensions import ExtensionCatalog, ExtensionManager, normalize_priority
 
     project_root = Path.cwd()
 
@@ -3084,8 +3352,15 @@ def extension_info(
         # Get local manifest info
         ext_manifest = manager.get_extension(resolved_installed_id)
         metadata = manager.registry.get(resolved_installed_id)
+        metadata_is_dict = isinstance(metadata, dict)
+        if not metadata_is_dict:
+            console.print(
+                "[yellow]Warning:[/yellow] Extension metadata appears to be corrupted; "
+                "some information may be unavailable."
+            )
+        version = metadata.get("version", "unknown") if metadata_is_dict else "unknown"
 
-        console.print(f"\n[bold]{resolved_installed_name}[/bold] (v{metadata.get('version', 'unknown')})")
+        console.print(f"\n[bold]{resolved_installed_name}[/bold] (v{version})")
         console.print(f"ID: {resolved_installed_id}")
         console.print()
 
@@ -3113,6 +3388,8 @@ def extension_info(
 
         console.print()
         console.print("[green]✓ Installed[/green]")
+        priority = normalize_priority(metadata.get("priority") if metadata_is_dict else None)
+        console.print(f"[dim]Priority:[/dim] {priority}")
         console.print(f"\nTo remove: specify extension remove {resolved_installed_id}")
         return
 
@@ -3128,6 +3405,8 @@ def extension_info(
 
 def _print_extension_info(ext_info: dict, manager):
     """Print formatted extension info from catalog data."""
+    from .extensions import normalize_priority
+
     # Header
     verified_badge = " [green]✓ Verified[/green]" if ext_info.get("verified") else ""
     console.print(f"\n[bold]{ext_info['name']}[/bold] (v{ext_info['version']}){verified_badge}")
@@ -3206,6 +3485,9 @@ def _print_extension_info(ext_info: dict, manager):
     install_allowed = ext_info.get("_install_allowed", True)
     if is_installed:
         console.print("[green]✓ Installed[/green]")
+        metadata = manager.registry.get(ext_info['id'])
+        priority = normalize_priority(metadata.get("priority") if isinstance(metadata, dict) else None)
+        console.print(f"[dim]Priority:[/dim] {priority}")
         console.print(f"\nTo remove: specify extension remove {ext_info['id']}")
     elif install_allowed:
         console.print("[yellow]Not installed[/yellow]")
@@ -3232,6 +3514,7 @@ def extension_update(
         ValidationError,
         CommandRegistrar,
         HookExecutor,
+        normalize_priority,
     )
     from packaging import version as pkg_version
     import shutil
@@ -3271,7 +3554,7 @@ def extension_update(
         for ext_id in extensions_to_update:
             # Get installed version
             metadata = manager.registry.get(ext_id)
-            if metadata is None or "version" not in metadata:
+            if metadata is None or not isinstance(metadata, dict) or "version" not in metadata:
                 console.print(f"⚠  {ext_id}: Registry entry corrupted or missing (skipping)")
                 continue
             try:
@@ -3456,13 +3739,13 @@ def extension_update(
                                 shutil.copy2(cfg_file, new_extension_dir / cfg_file.name)
 
                     # 9. Restore metadata from backup (installed_at, enabled state)
-                    if backup_registry_entry:
+                    if backup_registry_entry and isinstance(backup_registry_entry, dict):
                         # Copy current registry entry to avoid mutating internal
                         # registry state before explicit restore().
                         current_metadata = manager.registry.get(extension_id)
-                        if current_metadata is None:
+                        if current_metadata is None or not isinstance(current_metadata, dict):
                             raise RuntimeError(
-                                f"Registry entry for '{extension_id}' missing after install — update incomplete"
+                                f"Registry entry for '{extension_id}' missing or corrupted after install — update incomplete"
                             )
                         new_metadata = dict(current_metadata)
 
@@ -3470,6 +3753,10 @@ def extension_update(
                         if "installed_at" in backup_registry_entry:
                             new_metadata["installed_at"] = backup_registry_entry["installed_at"]
 
+                        # Preserve the original priority (normalized to handle corruption)
+                        if "priority" in backup_registry_entry:
+                            new_metadata["priority"] = normalize_priority(backup_registry_entry["priority"])
+
                         # If extension was disabled before update, disable it again
                         if not backup_registry_entry.get("enabled", True):
                             new_metadata["enabled"] = False
@@ -3523,7 +3810,7 @@ def extension_update(
                     # (files that weren't in the original backup)
                     try:
                         new_registry_entry = manager.registry.get(extension_id)
-                        if new_registry_entry is None:
+                        if new_registry_entry is None or not isinstance(new_registry_entry, dict):
                             new_registered_commands = {}
                         else:
                             new_registered_commands = new_registry_entry.get("registered_commands", {})
@@ -3643,16 +3930,15 @@ def extension_enable(
 
     # Update registry
     metadata = manager.registry.get(extension_id)
-    if metadata is None:
+    if metadata is None or not isinstance(metadata, dict):
         console.print(f"[red]Error:[/red] Extension '{extension_id}' not found in registry (corrupted state)")
         raise typer.Exit(1)
-    
+
     if metadata.get("enabled", True):
         console.print(f"[yellow]Extension '{display_name}' is already enabled[/yellow]")
         raise typer.Exit(0)
 
-    metadata["enabled"] = True
-    manager.registry.update(extension_id, metadata)
+    manager.registry.update(extension_id, {"enabled": True})
 
     # Enable hooks in extensions.yml
     config = hook_executor.get_project_config()
@@ -3691,16 +3977,15 @@ def extension_disable(
 
     # Update registry
     metadata = manager.registry.get(extension_id)
-    if metadata is None:
+    if metadata is None or not isinstance(metadata, dict):
         console.print(f"[red]Error:[/red] Extension '{extension_id}' not found in registry (corrupted state)")
         raise typer.Exit(1)
-    
+
     if not metadata.get("enabled", True):
         console.print(f"[yellow]Extension '{display_name}' is already disabled[/yellow]")
         raise typer.Exit(0)
 
-    metadata["enabled"] = False
-    manager.registry.update(extension_id, metadata)
+    manager.registry.update(extension_id, {"enabled": False})
 
     # Disable hooks in extensions.yml
     config = hook_executor.get_project_config()
@@ -3716,6 +4001,57 @@ def extension_disable(
     console.print(f"To re-enable: specify extension enable {extension_id}")
 
 
+@extension_app.command("set-priority")
+def extension_set_priority(
+    extension: str = typer.Argument(help="Extension ID or name"),
+    priority: int = typer.Argument(help="New priority (lower = higher precedence)"),
+):
+    """Set the resolution priority of an installed extension."""
+    from .extensions import ExtensionManager
+
+    project_root = Path.cwd()
+
+    # Check if we're in a spec-kit project
+    specify_dir = project_root / ".specify"
+    if not specify_dir.exists():
+        console.print("[red]Error:[/red] Not a spec-kit project (no .specify/ directory)")
+        console.print("Run this command from a spec-kit project root")
+        raise typer.Exit(1)
+
+    # Validate priority
+    if priority < 1:
+        console.print("[red]Error:[/red] Priority must be a positive integer (1 or higher)")
+        raise typer.Exit(1)
+
+    manager = ExtensionManager(project_root)
+
+    # Resolve extension ID from argument (handles ambiguous names)
+    installed = manager.list_installed()
+    extension_id, display_name = _resolve_installed_extension(extension, installed, "set-priority")
+
+    # Get current metadata
+    metadata = manager.registry.get(extension_id)
+    if metadata is None or not isinstance(metadata, dict):
+        console.print(f"[red]Error:[/red] Extension '{extension_id}' not found in registry (corrupted state)")
+        raise typer.Exit(1)
+
+    from .extensions import normalize_priority
+    raw_priority = metadata.get("priority")
+    # Only skip if the stored value is already a valid int equal to requested priority
+    # This ensures corrupted values (e.g., "high") get repaired even when setting to default (10)
+    if isinstance(raw_priority, int) and raw_priority == priority:
+        console.print(f"[yellow]Extension '{display_name}' already has priority {priority}[/yellow]")
+        raise typer.Exit(0)
+
+    old_priority = normalize_priority(raw_priority)
+
+    # Update priority
+    manager.registry.update(extension_id, {"priority": priority})
+
+    console.print(f"[green]✓[/green] Extension '{display_name}' priority changed: {old_priority} → {priority}")
+    console.print("\n[dim]Lower priority = higher precedence in template resolution[/dim]")
+
+
 def main():
     app()
 

src/specify_cli/agents.py

@@ -106,6 +106,12 @@ class CommandRegistrar:
             "args": "$ARGUMENTS",
             "extension": ".md"
         },
+        "pi": {
+            "dir": ".pi/prompts",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
         "amp": {
             "dir": ".agents/commands",
             "format": "markdown",
@@ -135,6 +141,18 @@ class CommandRegistrar:
             "format": "markdown",
             "args": "$ARGUMENTS",
             "extension": "/SKILL.md"
+        },
+        "trae": {
+            "dir": ".trae/rules",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "iflow": {
+            "dir": ".iflow/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
         }
     }
 

src/specify_cli/extensions.py

@@ -41,6 +41,26 @@ class CompatibilityError(ExtensionError):
     pass
 
 
+def normalize_priority(value: Any, default: int = 10) -> int:
+    """Normalize a stored priority value for sorting and display.
+
+    Corrupted registry data may contain missing, non-numeric, or non-positive
+    values. In those cases, fall back to the default priority.
+
+    Args:
+        value: Priority value to normalize (may be int, str, None, etc.)
+        default: Default priority to use for invalid values (default: 10)
+
+    Returns:
+        Normalized priority as positive integer (>= 1)
+    """
+    try:
+        priority = int(value)
+    except (TypeError, ValueError):
+        return default
+    return priority if priority >= 1 else default
+
+
 @dataclass
 class CatalogEntry:
     """Represents a single catalog entry in the catalog stack."""
@@ -202,7 +222,17 @@ class ExtensionRegistry:
 
         try:
             with open(self.registry_path, 'r') as f:
-                return json.load(f)
+                data = json.load(f)
+            # Validate loaded data is a dict (handles corrupted registry files)
+            if not isinstance(data, dict):
+                return {
+                    "schema_version": self.SCHEMA_VERSION,
+                    "extensions": {}
+                }
+            # Normalize extensions field (handles corrupted extensions value)
+            if not isinstance(data.get("extensions"), dict):
+                data["extensions"] = {}
+            return data
         except (json.JSONDecodeError, FileNotFoundError):
             # Corrupted or missing registry, start fresh
             return {
@@ -224,7 +254,7 @@ class ExtensionRegistry:
             metadata: Extension metadata (version, source, etc.)
         """
         self.data["extensions"][extension_id] = {
-            **metadata,
+            **copy.deepcopy(metadata),
             "installed_at": datetime.now(timezone.utc).isoformat()
         }
         self._save()
@@ -247,12 +277,16 @@ class ExtensionRegistry:
         Raises:
             KeyError: If extension is not installed
         """
-        if extension_id not in self.data["extensions"]:
+        extensions = self.data.get("extensions")
+        if not isinstance(extensions, dict) or extension_id not in extensions:
             raise KeyError(f"Extension '{extension_id}' is not installed")
         # Merge new metadata with existing, preserving original installed_at
-        existing = self.data["extensions"][extension_id]
-        # Merge: existing fields preserved, new fields override
-        merged = {**existing, **metadata}
+        existing = extensions[extension_id]
+        # Handle corrupted registry entries (e.g., string/list instead of dict)
+        if not isinstance(existing, dict):
+            existing = {}
+        # Merge: existing fields preserved, new fields override (deep copy to prevent caller mutation)
+        merged = {**existing, **copy.deepcopy(metadata)}
         # Always preserve original installed_at based on key existence, not truthiness,
         # to handle cases where the field exists but may be falsy (legacy/corruption)
         if "installed_at" in existing:
@@ -260,7 +294,7 @@ class ExtensionRegistry:
         else:
             # If not present in existing, explicitly remove from merged if caller provided it
             merged.pop("installed_at", None)
-        self.data["extensions"][extension_id] = merged
+        extensions[extension_id] = merged
         self._save()
 
     def restore(self, extension_id: str, metadata: dict):
@@ -273,8 +307,16 @@ class ExtensionRegistry:
         Args:
             extension_id: Extension ID
             metadata: Complete extension metadata including installed_at
+
+        Raises:
+            ValueError: If metadata is None or not a dict
         """
-        self.data["extensions"][extension_id] = dict(metadata)
+        if metadata is None or not isinstance(metadata, dict):
+            raise ValueError(f"Cannot restore '{extension_id}': metadata must be a dict")
+        # Ensure extensions dict exists (handle corrupted registry)
+        if not isinstance(self.data.get("extensions"), dict):
+            self.data["extensions"] = {}
+        self.data["extensions"][extension_id] = copy.deepcopy(metadata)
         self._save()
 
     def remove(self, extension_id: str):
@@ -283,8 +325,11 @@ class ExtensionRegistry:
         Args:
             extension_id: Extension ID
         """
-        if extension_id in self.data["extensions"]:
-            del self.data["extensions"][extension_id]
+        extensions = self.data.get("extensions")
+        if not isinstance(extensions, dict):
+            return
+        if extension_id in extensions:
+            del extensions[extension_id]
             self._save()
 
     def get(self, extension_id: str) -> Optional[dict]:
@@ -297,21 +342,49 @@ class ExtensionRegistry:
             extension_id: Extension ID
 
         Returns:
-            Deep copy of extension metadata, or None if not found
+            Deep copy of extension metadata, or None if not found or corrupted
         """
-        entry = self.data["extensions"].get(extension_id)
-        return copy.deepcopy(entry) if entry is not None else None
+        extensions = self.data.get("extensions")
+        if not isinstance(extensions, dict):
+            return None
+        entry = extensions.get(extension_id)
+        # Return None for missing or corrupted (non-dict) entries
+        if entry is None or not isinstance(entry, dict):
+            return None
+        return copy.deepcopy(entry)
 
     def list(self) -> Dict[str, dict]:
-        """Get all installed extensions.
+        """Get all installed extensions with valid metadata.
 
-        Returns a deep copy of the extensions mapping to prevent callers
-        from accidentally mutating nested internal registry state.
+        Returns a deep copy of extensions with dict metadata only.
+        Corrupted entries (non-dict values) are filtered out.
 
         Returns:
-            Dictionary of extension_id -> metadata (deep copies)
+            Dictionary of extension_id -> metadata (deep copies), empty dict if corrupted
         """
-        return copy.deepcopy(self.data["extensions"])
+        extensions = self.data.get("extensions", {}) or {}
+        if not isinstance(extensions, dict):
+            return {}
+        # Filter to only valid dict entries to match type contract
+        return {
+            ext_id: copy.deepcopy(meta)
+            for ext_id, meta in extensions.items()
+            if isinstance(meta, dict)
+        }
+
+    def keys(self) -> set:
+        """Get all extension IDs including corrupted entries.
+
+        Lightweight method that returns IDs without deep-copying metadata.
+        Use this when you only need to check which extensions are tracked.
+
+        Returns:
+            Set of extension IDs (includes corrupted entries)
+        """
+        extensions = self.data.get("extensions", {}) or {}
+        if not isinstance(extensions, dict):
+            return set()
+        return set(extensions.keys())
 
     def is_installed(self, extension_id: str) -> bool:
         """Check if extension is installed.
@@ -320,9 +393,44 @@ class ExtensionRegistry:
             extension_id: Extension ID
 
         Returns:
-            True if extension is installed
+            True if extension is installed, False if not or registry corrupted
         """
-        return extension_id in self.data["extensions"]
+        extensions = self.data.get("extensions")
+        if not isinstance(extensions, dict):
+            return False
+        return extension_id in extensions
+
+    def list_by_priority(self, include_disabled: bool = False) -> List[tuple]:
+        """Get all installed extensions sorted by priority.
+
+        Lower priority number = higher precedence (checked first).
+        Extensions with equal priority are sorted alphabetically by ID
+        for deterministic ordering.
+
+        Args:
+            include_disabled: If True, include disabled extensions. Default False.
+
+        Returns:
+            List of (extension_id, metadata_copy) tuples sorted by priority.
+            Metadata is deep-copied to prevent accidental mutation.
+        """
+        extensions = self.data.get("extensions", {}) or {}
+        if not isinstance(extensions, dict):
+            extensions = {}
+        sortable_extensions = []
+        for ext_id, meta in extensions.items():
+            if not isinstance(meta, dict):
+                continue
+            # Skip disabled extensions unless explicitly requested
+            if not include_disabled and not meta.get("enabled", True):
+                continue
+            metadata_copy = copy.deepcopy(meta)
+            metadata_copy["priority"] = normalize_priority(metadata_copy.get("priority", 10))
+            sortable_extensions.append((ext_id, metadata_copy))
+        return sorted(
+            sortable_extensions,
+            key=lambda item: (item[1]["priority"], item[0]),
+        )
 
 
 class ExtensionManager:
@@ -440,7 +548,8 @@ class ExtensionManager:
         self,
         source_dir: Path,
         speckit_version: str,
-        register_commands: bool = True
+        register_commands: bool = True,
+        priority: int = 10,
     ) -> ExtensionManifest:
         """Install extension from a local directory.
 
@@ -448,14 +557,19 @@ class ExtensionManager:
             source_dir: Path to extension directory
             speckit_version: Current spec-kit version
             register_commands: If True, register commands with AI agents
+            priority: Resolution priority (lower = higher precedence, default 10)
 
         Returns:
             Installed extension manifest
 
         Raises:
-            ValidationError: If manifest is invalid
+            ValidationError: If manifest is invalid or priority is invalid
             CompatibilityError: If extension is incompatible
         """
+        # Validate priority
+        if priority < 1:
+            raise ValidationError("Priority must be a positive integer (1 or higher)")
+
         # Load and validate manifest
         manifest_path = source_dir / "extension.yml"
         manifest = ExtensionManifest(manifest_path)
@@ -497,6 +611,7 @@ class ExtensionManager:
             "source": "local",
             "manifest_hash": manifest.get_hash(),
             "enabled": True,
+            "priority": priority,
             "registered_commands": registered_commands
         })
 
@@ -505,21 +620,27 @@ class ExtensionManager:
     def install_from_zip(
         self,
         zip_path: Path,
-        speckit_version: str
+        speckit_version: str,
+        priority: int = 10,
     ) -> ExtensionManifest:
         """Install extension from ZIP file.
 
         Args:
             zip_path: Path to extension ZIP file
             speckit_version: Current spec-kit version
+            priority: Resolution priority (lower = higher precedence, default 10)
 
         Returns:
             Installed extension manifest
 
         Raises:
-            ValidationError: If manifest is invalid
+            ValidationError: If manifest is invalid or priority is invalid
             CompatibilityError: If extension is incompatible
         """
+        # Validate priority early
+        if priority < 1:
+            raise ValidationError("Priority must be a positive integer (1 or higher)")
+
         with tempfile.TemporaryDirectory() as tmpdir:
             temp_path = Path(tmpdir)
 
@@ -554,7 +675,7 @@ class ExtensionManager:
                 raise ValidationError("No extension.yml found in ZIP file")
 
             # Install from extracted directory
-            return self.install_from_directory(extension_dir, speckit_version)
+            return self.install_from_directory(extension_dir, speckit_version, priority=priority)
 
     def remove(self, extension_id: str, keep_config: bool = False) -> bool:
         """Remove an installed extension.
@@ -571,7 +692,7 @@ class ExtensionManager:
 
         # Get registered commands before removal
         metadata = self.registry.get(extension_id)
-        registered_commands = metadata.get("registered_commands", {})
+        registered_commands = metadata.get("registered_commands", {}) if metadata else {}
 
         extension_dir = self.extensions_dir / extension_id
 
@@ -632,6 +753,9 @@ class ExtensionManager:
         result = []
 
         for ext_id, metadata in self.registry.list().items():
+            # Ensure metadata is a dictionary to avoid AttributeError when using .get()
+            if not isinstance(metadata, dict):
+                metadata = {}
             ext_dir = self.extensions_dir / ext_id
             manifest_path = ext_dir / "extension.yml"
 
@@ -643,6 +767,7 @@ class ExtensionManager:
                     "version": metadata.get("version", "unknown"),
                     "description": manifest.description,
                     "enabled": metadata.get("enabled", True),
+                    "priority": normalize_priority(metadata.get("priority")),
                     "installed_at": metadata.get("installed_at"),
                     "command_count": len(manifest.commands),
                     "hook_count": len(manifest.hooks)
@@ -655,6 +780,7 @@ class ExtensionManager:
                     "version": metadata.get("version", "unknown"),
                     "description": "⚠️ Corrupted extension",
                     "enabled": False,
+                    "priority": normalize_priority(metadata.get("priority")),
                     "installed_at": metadata.get("installed_at"),
                     "command_count": 0,
                     "hook_count": 0

src/specify_cli/presets.py

@@ -7,6 +7,7 @@ Presets are self-contained, versioned collections of templates
 customize the Spec-Driven Development workflow.
 """
 
+import copy
 import json
 import hashlib
 import os
@@ -23,6 +24,8 @@ import yaml
 from packaging import version as pkg_version
 from packaging.specifiers import SpecifierSet, InvalidSpecifier
 
+from .extensions import ExtensionRegistry, normalize_priority
+
 
 @dataclass
 class PresetCatalogEntry:
@@ -235,7 +238,17 @@ class PresetRegistry:
 
         try:
             with open(self.registry_path, 'r') as f:
-                return json.load(f)
+                data = json.load(f)
+            # Validate loaded data is a dict (handles corrupted registry files)
+            if not isinstance(data, dict):
+                return {
+                    "schema_version": self.SCHEMA_VERSION,
+                    "presets": {}
+                }
+            # Normalize presets field (handles corrupted presets value)
+            if not isinstance(data.get("presets"), dict):
+                data["presets"] = {}
+            return data
         except (json.JSONDecodeError, FileNotFoundError):
             return {
                 "schema_version": self.SCHEMA_VERSION,
@@ -256,7 +269,7 @@ class PresetRegistry:
             metadata: Pack metadata (version, source, etc.)
         """
         self.data["presets"][pack_id] = {
-            **metadata,
+            **copy.deepcopy(metadata),
             "installed_at": datetime.now(timezone.utc).isoformat()
         }
         self._save()
@@ -267,41 +280,152 @@ class PresetRegistry:
         Args:
             pack_id: Preset ID
         """
-        if pack_id in self.data["presets"]:
-            del self.data["presets"][pack_id]
+        packs = self.data.get("presets")
+        if not isinstance(packs, dict):
+            return
+        if pack_id in packs:
+            del packs[pack_id]
             self._save()
 
+    def update(self, pack_id: str, updates: dict):
+        """Update preset metadata in registry.
+
+        Merges the provided updates with the existing entry, preserving any
+        fields not specified. The installed_at timestamp is always preserved
+        from the original entry.
+
+        Args:
+            pack_id: Preset ID
+            updates: Partial metadata to merge into existing metadata
+
+        Raises:
+            KeyError: If preset is not installed
+        """
+        packs = self.data.get("presets")
+        if not isinstance(packs, dict) or pack_id not in packs:
+            raise KeyError(f"Preset '{pack_id}' not found in registry")
+        existing = packs[pack_id]
+        # Handle corrupted registry entries (e.g., string/list instead of dict)
+        if not isinstance(existing, dict):
+            existing = {}
+        # Merge: existing fields preserved, new fields override (deep copy to prevent caller mutation)
+        merged = {**existing, **copy.deepcopy(updates)}
+        # Always preserve original installed_at based on key existence, not truthiness,
+        # to handle cases where the field exists but may be falsy (legacy/corruption)
+        if "installed_at" in existing:
+            merged["installed_at"] = existing["installed_at"]
+        else:
+            # If not present in existing, explicitly remove from merged if caller provided it
+            merged.pop("installed_at", None)
+        packs[pack_id] = merged
+        self._save()
+
+    def restore(self, pack_id: str, metadata: dict):
+        """Restore preset metadata to registry without modifying timestamps.
+
+        Use this method for rollback scenarios where you have a complete backup
+        of the registry entry (including installed_at) and want to restore it
+        exactly as it was.
+
+        Args:
+            pack_id: Preset ID
+            metadata: Complete preset metadata including installed_at
+
+        Raises:
+            ValueError: If metadata is None or not a dict
+        """
+        if metadata is None or not isinstance(metadata, dict):
+            raise ValueError(f"Cannot restore '{pack_id}': metadata must be a dict")
+        # Ensure presets dict exists (handle corrupted registry)
+        if not isinstance(self.data.get("presets"), dict):
+            self.data["presets"] = {}
+        self.data["presets"][pack_id] = copy.deepcopy(metadata)
+        self._save()
+
     def get(self, pack_id: str) -> Optional[dict]:
         """Get preset metadata from registry.
 
+        Returns a deep copy to prevent callers from accidentally mutating
+        nested internal registry state without going through the write path.
+
         Args:
             pack_id: Preset ID
 
         Returns:
-            Pack metadata or None if not found
+            Deep copy of preset metadata, or None if not found or corrupted
         """
-        return self.data["presets"].get(pack_id)
+        packs = self.data.get("presets")
+        if not isinstance(packs, dict):
+            return None
+        entry = packs.get(pack_id)
+        # Return None for missing or corrupted (non-dict) entries
+        if entry is None or not isinstance(entry, dict):
+            return None
+        return copy.deepcopy(entry)
 
     def list(self) -> Dict[str, dict]:
-        """Get all installed presets.
+        """Get all installed presets with valid metadata.
+
+        Returns a deep copy of presets with dict metadata only.
+        Corrupted entries (non-dict values) are filtered out.
 
         Returns:
-            Dictionary of pack_id -> metadata
+            Dictionary of pack_id -> metadata (deep copies), empty dict if corrupted
         """
-        return self.data["presets"]
+        packs = self.data.get("presets", {}) or {}
+        if not isinstance(packs, dict):
+            return {}
+        # Filter to only valid dict entries to match type contract
+        return {
+            pack_id: copy.deepcopy(meta)
+            for pack_id, meta in packs.items()
+            if isinstance(meta, dict)
+        }
 
-    def list_by_priority(self) -> List[tuple]:
+    def keys(self) -> set:
+        """Get all preset IDs including corrupted entries.
+
+        Lightweight method that returns IDs without deep-copying metadata.
+        Use this when you only need to check which presets are tracked.
+
+        Returns:
+            Set of preset IDs (includes corrupted entries)
+        """
+        packs = self.data.get("presets", {}) or {}
+        if not isinstance(packs, dict):
+            return set()
+        return set(packs.keys())
+
+    def list_by_priority(self, include_disabled: bool = False) -> List[tuple]:
         """Get all installed presets sorted by priority.
 
         Lower priority number = higher precedence (checked first).
+        Presets with equal priority are sorted alphabetically by ID
+        for deterministic ordering.
+
+        Args:
+            include_disabled: If True, include disabled presets. Default False.
 
         Returns:
-            List of (pack_id, metadata) tuples sorted by priority
+            List of (pack_id, metadata_copy) tuples sorted by priority.
+            Metadata is deep-copied to prevent accidental mutation.
         """
-        packs = self.data["presets"]
+        packs = self.data.get("presets", {}) or {}
+        if not isinstance(packs, dict):
+            packs = {}
+        sortable_packs = []
+        for pack_id, meta in packs.items():
+            if not isinstance(meta, dict):
+                continue
+            # Skip disabled presets unless explicitly requested
+            if not include_disabled and not meta.get("enabled", True):
+                continue
+            metadata_copy = copy.deepcopy(meta)
+            metadata_copy["priority"] = normalize_priority(metadata_copy.get("priority", 10))
+            sortable_packs.append((pack_id, metadata_copy))
         return sorted(
-            packs.items(),
-            key=lambda item: item[1].get("priority", 10),
+            sortable_packs,
+            key=lambda item: (item[1]["priority"], item[0]),
         )
 
     def is_installed(self, pack_id: str) -> bool:
@@ -311,9 +435,12 @@ class PresetRegistry:
             pack_id: Preset ID
 
         Returns:
-            True if pack is installed
+            True if pack is installed, False if not or registry corrupted
         """
-        return pack_id in self.data["presets"]
+        packs = self.data.get("presets")
+        if not isinstance(packs, dict):
+            return False
+        return pack_id in packs
 
 
 class PresetManager:
@@ -680,9 +807,13 @@ class PresetManager:
             Installed preset manifest
 
         Raises:
-            PresetValidationError: If manifest is invalid
+            PresetValidationError: If manifest is invalid or priority is invalid
             PresetCompatibilityError: If pack is incompatible
         """
+        # Validate priority
+        if priority < 1:
+            raise PresetValidationError("Priority must be a positive integer (1 or higher)")
+
         manifest_path = source_dir / "preset.yml"
         manifest = PresetManifest(manifest_path)
 
@@ -729,14 +860,19 @@ class PresetManager:
         Args:
             zip_path: Path to preset ZIP file
             speckit_version: Current spec-kit version
+            priority: Resolution priority (lower = higher precedence, default 10)
 
         Returns:
             Installed preset manifest
 
         Raises:
-            PresetValidationError: If manifest is invalid
+            PresetValidationError: If manifest is invalid or priority is invalid
             PresetCompatibilityError: If pack is incompatible
         """
+        # Validate priority early
+        if priority < 1:
+            raise PresetValidationError("Priority must be a positive integer (1 or higher)")
+
         with tempfile.TemporaryDirectory() as tmpdir:
             temp_path = Path(tmpdir)
 
@@ -808,6 +944,9 @@ class PresetManager:
         result = []
 
         for pack_id, metadata in self.registry.list().items():
+            # Ensure metadata is a dictionary to avoid AttributeError when using .get()
+            if not isinstance(metadata, dict):
+                metadata = {}
             pack_dir = self.presets_dir / pack_id
             manifest_path = pack_dir / "preset.yml"
 
@@ -816,13 +955,13 @@ class PresetManager:
                 result.append({
                     "id": pack_id,
                     "name": manifest.name,
-                    "version": metadata["version"],
+                    "version": metadata.get("version", manifest.version),
                     "description": manifest.description,
                     "enabled": metadata.get("enabled", True),
                     "installed_at": metadata.get("installed_at"),
                     "template_count": len(manifest.templates),
                     "tags": manifest.tags,
-                    "priority": metadata.get("priority", 10),
+                    "priority": normalize_priority(metadata.get("priority")),
                 })
             except PresetValidationError:
                 result.append({
@@ -834,7 +973,7 @@ class PresetManager:
                     "installed_at": metadata.get("installed_at"),
                     "template_count": 0,
                     "tags": [],
-                    "priority": metadata.get("priority", 10),
+                    "priority": normalize_priority(metadata.get("priority")),
                 })
 
         return result
@@ -1393,6 +1532,48 @@ class PresetResolver:
         self.overrides_dir = self.templates_dir / "overrides"
         self.extensions_dir = project_root / ".specify" / "extensions"
 
+    def _get_all_extensions_by_priority(self) -> list[tuple[int, str, dict | None]]:
+        """Build unified list of registered and unregistered extensions sorted by priority.
+
+        Registered extensions use their stored priority; unregistered directories
+        get implicit priority=10. Results are sorted by (priority, ext_id) for
+        deterministic ordering.
+
+        Returns:
+            List of (priority, ext_id, metadata_or_none) tuples sorted by priority.
+        """
+        if not self.extensions_dir.exists():
+            return []
+
+        registry = ExtensionRegistry(self.extensions_dir)
+        # Use keys() to track ALL extensions (including corrupted entries) without deep copy
+        # This prevents corrupted entries from being picked up as "unregistered" dirs
+        registered_extension_ids = registry.keys()
+
+        # Get all registered extensions including disabled; we filter disabled manually below
+        all_registered = registry.list_by_priority(include_disabled=True)
+
+        all_extensions: list[tuple[int, str, dict | None]] = []
+
+        # Only include enabled extensions in the result
+        for ext_id, metadata in all_registered:
+            # Skip disabled extensions
+            if not metadata.get("enabled", True):
+                continue
+            priority = normalize_priority(metadata.get("priority") if metadata else None)
+            all_extensions.append((priority, ext_id, metadata))
+
+        # Add unregistered directories with implicit priority=10
+        for ext_dir in self.extensions_dir.iterdir():
+            if not ext_dir.is_dir() or ext_dir.name.startswith("."):
+                continue
+            if ext_dir.name not in registered_extension_ids:
+                all_extensions.append((10, ext_dir.name, None))
+
+        # Sort by (priority, ext_id) for deterministic ordering
+        all_extensions.sort(key=lambda x: (x[0], x[1]))
+        return all_extensions
+
     def resolve(
         self,
         template_name: str,
@@ -1445,18 +1626,18 @@ class PresetResolver:
                     if candidate.exists():
                         return candidate
 
-        # Priority 3: Extension-provided templates
-        if self.extensions_dir.exists():
-            for ext_dir in sorted(self.extensions_dir.iterdir()):
-                if not ext_dir.is_dir() or ext_dir.name.startswith("."):
-                    continue
-                for subdir in subdirs:
-                    if subdir:
-                        candidate = ext_dir / subdir / f"{template_name}{ext}"
-                    else:
-                        candidate = ext_dir / "templates" / f"{template_name}{ext}"
-                    if candidate.exists():
-                        return candidate
+        # Priority 3: Extension-provided templates (sorted by priority — lower number wins)
+        for _priority, ext_id, _metadata in self._get_all_extensions_by_priority():
+            ext_dir = self.extensions_dir / ext_id
+            if not ext_dir.is_dir():
+                continue
+            for subdir in subdirs:
+                if subdir:
+                    candidate = ext_dir / subdir / f"{template_name}{ext}"
+                else:
+                    candidate = ext_dir / f"{template_name}{ext}"
+                if candidate.exists():
+                    return candidate
 
         # Priority 4: Core templates
         if template_type == "template":
@@ -1514,17 +1695,24 @@ class PresetResolver:
                 except ValueError:
                     continue
 
-        if self.extensions_dir.exists():
-            for ext_dir in sorted(self.extensions_dir.iterdir()):
-                if not ext_dir.is_dir() or ext_dir.name.startswith("."):
-                    continue
-                try:
-                    resolved.relative_to(ext_dir)
+        for _priority, ext_id, ext_meta in self._get_all_extensions_by_priority():
+            ext_dir = self.extensions_dir / ext_id
+            if not ext_dir.is_dir():
+                continue
+            try:
+                resolved.relative_to(ext_dir)
+                if ext_meta:
+                    version = ext_meta.get("version", "?")
                     return {
                         "path": resolved_str,
-                        "source": f"extension:{ext_dir.name}",
+                        "source": f"extension:{ext_id} v{version}",
                     }
-                except ValueError:
-                    continue
+                else:
+                    return {
+                        "path": resolved_str,
+                        "source": f"extension:{ext_id} (unregistered)",
+                    }
+            except ValueError:
+                continue
 
         return {"path": resolved_str, "source": "core"}

templates/commands/implement.md

@@ -19,7 +19,7 @@ You **MUST** consider the user input before proceeding (if not empty).
 - Check if `.specify/extensions.yml` exists in the project root.
 - If it exists, read it and look for entries under the `hooks.before_implement` key
 - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
-- Filter to only hooks where `enabled: true`
+- Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
 - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
   - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
   - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
@@ -174,7 +174,7 @@ Note: This command assumes a complete task breakdown exists in tasks.md. If task
 10. **Check for extension hooks**: After completion validation, check if `.specify/extensions.yml` exists in the project root.
     - If it exists, read it and look for entries under the `hooks.after_implement` key
     - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
-    - Filter to only hooks where `enabled: true`
+    - Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
     - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
       - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
       - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation

templates/commands/plan.md

@@ -24,6 +24,40 @@ $ARGUMENTS
 
 You **MUST** consider the user input before proceeding (if not empty).
 
+## Pre-Execution Checks
+
+**Check for extension hooks (before planning)**:
+- Check if `.specify/extensions.yml` exists in the project root.
+- If it exists, read it and look for entries under the `hooks.before_plan` key
+- If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
+- Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
+- For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
+  - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
+  - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
+- For each executable hook, output the following based on its `optional` flag:
+  - **Optional hook** (`optional: true`):
+    ```
+    ## Extension Hooks
+
+    **Optional Pre-Hook**: {extension}
+    Command: `/{command}`
+    Description: {description}
+
+    Prompt: {prompt}
+    To execute: `/{command}`
+    ```
+  - **Mandatory hook** (`optional: false`):
+    ```
+    ## Extension Hooks
+
+    **Automatic Pre-Hook**: {extension}
+    Executing: `/{command}`
+    EXECUTE_COMMAND: {command}
+
+    Wait for the result of the hook command before proceeding to the Outline.
+    ```
+- If no hooks are registered or `.specify/extensions.yml` does not exist, skip silently
+
 ## Outline
 
 1. **Setup**: Run `{SCRIPT}` from repo root and parse JSON for FEATURE_SPEC, IMPL_PLAN, SPECS_DIR, BRANCH. For single quotes in args like "I'm Groot", use escape syntax: e.g 'I'\''m Groot' (or double-quote if possible: "I'm Groot").
@@ -41,6 +75,35 @@ You **MUST** consider the user input before proceeding (if not empty).
 
 4. **Stop and report**: Command ends after Phase 2 planning. Report branch, IMPL_PLAN path, and generated artifacts.
 
+5. **Check for extension hooks**: After reporting, check if `.specify/extensions.yml` exists in the project root.
+   - If it exists, read it and look for entries under the `hooks.after_plan` key
+   - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
+   - Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
+   - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
+     - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
+     - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
+   - For each executable hook, output the following based on its `optional` flag:
+     - **Optional hook** (`optional: true`):
+       ```
+       ## Extension Hooks
+
+       **Optional Hook**: {extension}
+       Command: `/{command}`
+       Description: {description}
+
+       Prompt: {prompt}
+       To execute: `/{command}`
+       ```
+     - **Mandatory hook** (`optional: false`):
+       ```
+       ## Extension Hooks
+
+       **Automatic Hook**: {extension}
+       Executing: `/{command}`
+       EXECUTE_COMMAND: {command}
+       ```
+   - If no hooks are registered or `.specify/extensions.yml` does not exist, skip silently
+
 ## Phases
 
 ### Phase 0: Outline & Research

templates/commands/specify.md

@@ -21,6 +21,40 @@ $ARGUMENTS
 
 You **MUST** consider the user input before proceeding (if not empty).
 
+## Pre-Execution Checks
+
+**Check for extension hooks (before specification)**:
+- Check if `.specify/extensions.yml` exists in the project root.
+- If it exists, read it and look for entries under the `hooks.before_specify` key
+- If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
+- Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
+- For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
+  - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
+  - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
+- For each executable hook, output the following based on its `optional` flag:
+  - **Optional hook** (`optional: true`):
+    ```
+    ## Extension Hooks
+
+    **Optional Pre-Hook**: {extension}
+    Command: `/{command}`
+    Description: {description}
+
+    Prompt: {prompt}
+    To execute: `/{command}`
+    ```
+  - **Mandatory hook** (`optional: false`):
+    ```
+    ## Extension Hooks
+
+    **Automatic Pre-Hook**: {extension}
+    Executing: `/{command}`
+    EXECUTE_COMMAND: {command}
+
+    Wait for the result of the hook command before proceeding to the Outline.
+    ```
+- If no hooks are registered or `.specify/extensions.yml` does not exist, skip silently
+
 ## Outline
 
 The text the user typed after `/speckit.specify` in the triggering message **is** the feature description. Assume you always have it available in this conversation even if `{ARGS}` appears literally below. Do not ask the user to repeat it unless they provided an empty command.
@@ -176,6 +210,35 @@ Given that feature description, do this:
 
 7. Report completion with branch name, spec file path, checklist results, and readiness for the next phase (`/speckit.clarify` or `/speckit.plan`).
 
+8. **Check for extension hooks**: After reporting completion, check if `.specify/extensions.yml` exists in the project root.
+   - If it exists, read it and look for entries under the `hooks.after_specify` key
+   - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
+   - Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
+   - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
+     - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
+     - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
+   - For each executable hook, output the following based on its `optional` flag:
+     - **Optional hook** (`optional: true`):
+       ```
+       ## Extension Hooks
+
+       **Optional Hook**: {extension}
+       Command: `/{command}`
+       Description: {description}
+
+       Prompt: {prompt}
+       To execute: `/{command}`
+       ```
+     - **Mandatory hook** (`optional: false`):
+       ```
+       ## Extension Hooks
+
+       **Automatic Hook**: {extension}
+       Executing: `/{command}`
+       EXECUTE_COMMAND: {command}
+       ```
+   - If no hooks are registered or `.specify/extensions.yml` does not exist, skip silently
+
 **NOTE:** The script creates and checks out the new branch and initializes the spec file before writing.
 
 ## Quick Guidelines

templates/commands/tasks.md

@@ -28,7 +28,7 @@ You **MUST** consider the user input before proceeding (if not empty).
 - Check if `.specify/extensions.yml` exists in the project root.
 - If it exists, read it and look for entries under the `hooks.before_tasks` key
 - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
-- Filter to only hooks where `enabled: true`
+- Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
 - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
   - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
   - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation
@@ -100,7 +100,7 @@ You **MUST** consider the user input before proceeding (if not empty).
 6. **Check for extension hooks**: After tasks.md is generated, check if `.specify/extensions.yml` exists in the project root.
    - If it exists, read it and look for entries under the `hooks.after_tasks` key
    - If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
-   - Filter to only hooks where `enabled: true`
+   - Filter out hooks where `enabled` is explicitly `false`. Treat hooks without an `enabled` field as enabled by default.
    - For each remaining hook, do **not** attempt to interpret or evaluate hook `condition` expressions:
      - If the hook has no `condition` field, or it is null/empty, treat the hook as executable
      - If the hook defines a non-empty `condition`, skip the hook and leave condition evaluation to the HookExecutor implementation

tests/test_agent_config_consistency.py

@@ -233,3 +233,221 @@ class TestAgentConfigConsistency:
     def test_ai_help_includes_kimi(self):
         """CLI help text for --ai should include kimi."""
         assert "kimi" in AI_ASSISTANT_HELP
+
+    # --- Trae IDE consistency checks ---
+
+    def test_trae_in_agent_config(self):
+        """AGENT_CONFIG should include trae with correct folder and commands_subdir."""
+        assert "trae" in AGENT_CONFIG
+        assert AGENT_CONFIG["trae"]["folder"] == ".trae/"
+        assert AGENT_CONFIG["trae"]["commands_subdir"] == "rules"
+        assert AGENT_CONFIG["trae"]["requires_cli"] is False
+        assert AGENT_CONFIG["trae"]["install_url"] is None
+
+    def test_trae_in_extension_registrar(self):
+        """Extension command registrar should include trae using .trae/rules and markdown, if present."""
+        cfg = CommandRegistrar.AGENT_CONFIGS
+
+        assert "trae" in cfg
+        trae_cfg = cfg["trae"]
+        assert trae_cfg["format"] == "markdown"
+        assert trae_cfg["args"] == "$ARGUMENTS"
+        assert trae_cfg["extension"] == ".md"
+
+    def test_trae_in_release_agent_lists(self):
+        """Bash and PowerShell release scripts should include trae in agent lists."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        sh_match = re.search(r"ALL_AGENTS=\(([^)]*)\)", sh_text)
+        assert sh_match is not None
+        sh_agents = sh_match.group(1).split()
+
+        ps_match = re.search(r"\$AllAgents = @\(([^)]*)\)", ps_text)
+        assert ps_match is not None
+        ps_agents = re.findall(r"'([^']+)'", ps_match.group(1))
+
+        assert "trae" in sh_agents
+        assert "trae" in ps_agents
+
+    def test_trae_in_release_scripts_generate_commands(self):
+        """Release scripts should generate markdown commands for trae in .trae/rules."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        assert ".trae/rules" in sh_text
+        assert ".trae/rules" in ps_text
+        assert re.search(r"'trae'\s*\{.*?\.trae/rules", ps_text, re.S) is not None
+
+    def test_trae_in_github_release_output(self):
+        """GitHub release script should include trae template packages."""
+        gh_release_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-github-release.sh").read_text(encoding="utf-8")
+
+        assert "spec-kit-template-trae-sh-" in gh_release_text
+        assert "spec-kit-template-trae-ps-" in gh_release_text
+
+    def test_trae_in_agent_context_scripts(self):
+        """Agent context scripts should support trae agent type."""
+        bash_text = (REPO_ROOT / "scripts" / "bash" / "update-agent-context.sh").read_text(encoding="utf-8")
+        pwsh_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        assert "trae" in bash_text
+        assert "TRAE_FILE" in bash_text
+        assert "trae" in pwsh_text
+        assert "TRAE_FILE" in pwsh_text
+
+    def test_trae_in_powershell_validate_set(self):
+        """PowerShell update-agent-context script should include 'trae' in ValidateSet."""
+        ps_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        validate_set_match = re.search(r"\[ValidateSet\(([^)]*)\)\]", ps_text)
+        assert validate_set_match is not None
+        validate_set_values = re.findall(r"'([^']+)'", validate_set_match.group(1))
+
+        assert "trae" in validate_set_values
+
+    def test_ai_help_includes_trae(self):
+        """CLI help text for --ai should include trae."""
+        assert "trae" in AI_ASSISTANT_HELP
+
+    # --- Pi Coding Agent consistency checks ---
+
+    def test_pi_in_agent_config(self):
+        """AGENT_CONFIG should include pi with correct folder and commands_subdir."""
+        assert "pi" in AGENT_CONFIG
+        assert AGENT_CONFIG["pi"]["folder"] == ".pi/"
+        assert AGENT_CONFIG["pi"]["commands_subdir"] == "prompts"
+        assert AGENT_CONFIG["pi"]["requires_cli"] is True
+        assert AGENT_CONFIG["pi"]["install_url"] is not None
+
+    def test_pi_in_extension_registrar(self):
+        """Extension command registrar should include pi using .pi/prompts."""
+        cfg = CommandRegistrar.AGENT_CONFIGS
+
+        assert "pi" in cfg
+        pi_cfg = cfg["pi"]
+        assert pi_cfg["dir"] == ".pi/prompts"
+        assert pi_cfg["format"] == "markdown"
+        assert pi_cfg["args"] == "$ARGUMENTS"
+        assert pi_cfg["extension"] == ".md"
+
+    def test_pi_in_release_agent_lists(self):
+        """Bash and PowerShell release scripts should include pi in agent lists."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        sh_match = re.search(r"ALL_AGENTS=\(([^)]*)\)", sh_text)
+        assert sh_match is not None
+        sh_agents = sh_match.group(1).split()
+
+        ps_match = re.search(r"\$AllAgents = @\(([^)]*)\)", ps_text)
+        assert ps_match is not None
+        ps_agents = re.findall(r"'([^']+)'", ps_match.group(1))
+
+        assert "pi" in sh_agents
+        assert "pi" in ps_agents
+
+    def test_release_scripts_generate_pi_prompt_templates(self):
+        """Release scripts should generate Markdown prompt templates for pi in .pi/prompts."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        assert ".pi/prompts" in sh_text
+        assert ".pi/prompts" in ps_text
+        assert re.search(r"pi\)\s*\n.*?\.pi/prompts", sh_text, re.S) is not None
+        assert re.search(r"'pi'\s*\{.*?\.pi/prompts", ps_text, re.S) is not None
+
+    def test_pi_in_powershell_validate_set(self):
+        """PowerShell update-agent-context script should include 'pi' in ValidateSet."""
+        ps_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        validate_set_match = re.search(r"\[ValidateSet\(([^)]*)\)\]", ps_text)
+        assert validate_set_match is not None
+        validate_set_values = re.findall(r"'([^']+)'", validate_set_match.group(1))
+
+        assert "pi" in validate_set_values
+
+    def test_pi_in_github_release_output(self):
+        """GitHub release script should include pi template packages."""
+        gh_release_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-github-release.sh").read_text(encoding="utf-8")
+
+        assert "spec-kit-template-pi-sh-" in gh_release_text
+        assert "spec-kit-template-pi-ps-" in gh_release_text
+
+    def test_agent_context_scripts_include_pi(self):
+        """Agent context scripts should support pi agent type."""
+        bash_text = (REPO_ROOT / "scripts" / "bash" / "update-agent-context.sh").read_text(encoding="utf-8")
+        pwsh_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        assert "pi" in bash_text
+        assert "Pi Coding Agent" in bash_text
+        assert "pi" in pwsh_text
+        assert "Pi Coding Agent" in pwsh_text
+
+    def test_ai_help_includes_pi(self):
+        """CLI help text for --ai should include pi."""
+        assert "pi" in AI_ASSISTANT_HELP
+
+    # --- iFlow CLI consistency checks ---
+
+    def test_iflow_in_agent_config(self):
+        """AGENT_CONFIG should include iflow with correct folder and commands_subdir."""
+        assert "iflow" in AGENT_CONFIG
+        assert AGENT_CONFIG["iflow"]["folder"] == ".iflow/"
+        assert AGENT_CONFIG["iflow"]["commands_subdir"] == "commands"
+        assert AGENT_CONFIG["iflow"]["requires_cli"] is True
+
+    def test_iflow_in_extension_registrar(self):
+        """Extension command registrar should include iflow targeting .iflow/commands."""
+        cfg = CommandRegistrar.AGENT_CONFIGS
+
+        assert "iflow" in cfg
+        assert cfg["iflow"]["dir"] == ".iflow/commands"
+        assert cfg["iflow"]["format"] == "markdown"
+        assert cfg["iflow"]["args"] == "$ARGUMENTS"
+
+    def test_iflow_in_release_agent_lists(self):
+        """Bash and PowerShell release scripts should include iflow in agent lists."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        sh_match = re.search(r"ALL_AGENTS=\(([^)]*)\)", sh_text)
+        assert sh_match is not None
+        sh_agents = sh_match.group(1).split()
+
+        ps_match = re.search(r"\$AllAgents = @\(([^)]*)\)", ps_text)
+        assert ps_match is not None
+        ps_agents = re.findall(r"'([^']+)'", ps_match.group(1))
+
+        assert "iflow" in sh_agents
+        assert "iflow" in ps_agents
+
+    def test_iflow_in_release_scripts_build_variant(self):
+        """Release scripts should generate Markdown commands for iflow in .iflow/commands."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")
+
+        assert ".iflow/commands" in sh_text
+        assert ".iflow/commands" in ps_text
+        assert re.search(r"'iflow'\s*\{.*?\.iflow/commands", ps_text, re.S) is not None
+
+    def test_iflow_in_github_release_output(self):
+        """GitHub release script should include iflow template packages."""
+        gh_release_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-github-release.sh").read_text(encoding="utf-8")
+
+        assert "spec-kit-template-iflow-sh-" in gh_release_text
+        assert "spec-kit-template-iflow-ps-" in gh_release_text
+
+    def test_iflow_in_agent_context_scripts(self):
+        """Agent context scripts should support iflow agent type."""
+        bash_text = (REPO_ROOT / "scripts" / "bash" / "update-agent-context.sh").read_text(encoding="utf-8")
+        pwsh_text = (REPO_ROOT / "scripts" / "powershell" / "update-agent-context.ps1").read_text(encoding="utf-8")
+
+        assert "iflow" in bash_text
+        assert "IFLOW_FILE" in bash_text
+        assert "iflow" in pwsh_text
+        assert "IFLOW_FILE" in pwsh_text
+
+    def test_ai_help_includes_iflow(self):
+        """CLI help text for --ai should include iflow."""
+        assert "iflow" in AI_ASSISTANT_HELP

tests/test_ai_skills.py

@@ -62,7 +62,7 @@ def templates_dir(project_dir):
     tpl_root.mkdir(parents=True, exist_ok=True)
 
     # Template with valid YAML frontmatter
-    (tpl_root / "specify.md").write_text(
+    (tpl_root / "speckit.specify.md").write_text(
         "---\n"
         "description: Create or update the feature specification.\n"
         "handoffs:\n"
@@ -79,7 +79,7 @@ def templates_dir(project_dir):
     )
 
     # Template with minimal frontmatter
-    (tpl_root / "plan.md").write_text(
+    (tpl_root / "speckit.plan.md").write_text(
         "---\n"
         "description: Generate implementation plan.\n"
         "---\n"
@@ -91,7 +91,7 @@ def templates_dir(project_dir):
     )
 
     # Template with no frontmatter
-    (tpl_root / "tasks.md").write_text(
+    (tpl_root / "speckit.tasks.md").write_text(
         "# Tasks Command\n"
         "\n"
         "Body without frontmatter.\n",
@@ -99,7 +99,7 @@ def templates_dir(project_dir):
     )
 
     # Template with empty YAML frontmatter (yaml.safe_load returns None)
-    (tpl_root / "empty_fm.md").write_text(
+    (tpl_root / "speckit.empty_fm.md").write_text(
         "---\n"
         "---\n"
         "\n"
@@ -182,6 +182,11 @@ class TestGetSkillsDir:
         result = _get_skills_dir(project_dir, "kiro-cli")
         assert result == project_dir / ".kiro" / "skills"
 
+    def test_pi_skills_dir(self, project_dir):
+        """Pi should use .pi/skills/."""
+        result = _get_skills_dir(project_dir, "pi")
+        assert result == project_dir / ".pi" / "skills"
+
     def test_unknown_agent_uses_default(self, project_dir):
         """Unknown agents should fall back to DEFAULT_SKILLS_DIR."""
         result = _get_skills_dir(project_dir, "nonexistent-agent")
@@ -337,7 +342,7 @@ class TestInstallAiSkills:
         cmds_dir = project_dir / ".claude" / "commands"
         cmds_dir.mkdir(parents=True)
 
-        (cmds_dir / "broken.md").write_text(
+        (cmds_dir / "speckit.broken.md").write_text(
             "---\n"
             "description: [unclosed bracket\n"
             "  invalid: yaml: content: here\n"
@@ -422,6 +427,27 @@ class TestInstallAiSkills:
         assert (cmds_dir / "speckit.specify.md").exists()
         assert (cmds_dir / "speckit.plan.md").exists()
 
+    def test_pi_prompt_dir_installs_skills(self, project_dir):
+        """Pi should install skills directly from .pi/prompts/."""
+        prompts_dir = project_dir / ".pi" / "prompts"
+        prompts_dir.mkdir(parents=True)
+        (prompts_dir / "speckit.specify.md").write_text(
+            "---\ndescription: Create or update the feature specification.\n---\n\n# Specify\n\nBody.\n"
+        )
+        (prompts_dir / "speckit.plan.md").write_text(
+            "---\ndescription: Generate implementation plan.\n---\n\n# Plan\n\nBody.\n"
+        )
+
+        result = install_ai_skills(project_dir, "pi")
+
+        assert result is True
+        skills_dir = project_dir / ".pi" / "skills"
+        assert skills_dir.exists()
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        assert len(skill_dirs) >= 1
+        assert (prompts_dir / "speckit.specify.md").exists()
+        assert (prompts_dir / "speckit.plan.md").exists()
+
     @pytest.mark.parametrize("agent_key", [k for k in AGENT_CONFIG.keys() if k != "generic"])
     def test_skills_install_for_all_agents(self, temp_dir, agent_key):
         """install_ai_skills should produce skills for every configured agent."""
@@ -430,9 +456,12 @@ class TestInstallAiSkills:
 
         # Place .md templates in the agent's commands directory
         agent_folder = AGENT_CONFIG[agent_key]["folder"]
-        cmds_dir = proj / agent_folder.rstrip("/") / "commands"
+        commands_subdir = AGENT_CONFIG[agent_key].get("commands_subdir", "commands")
+        cmds_dir = proj / agent_folder.rstrip("/") / commands_subdir
         cmds_dir.mkdir(parents=True)
-        (cmds_dir / "specify.md").write_text(
+        # Copilot uses speckit.*.agent.md templates; other agents use speckit.*.md
+        fname = "speckit.specify.agent.md" if agent_key == "copilot" else "speckit.specify.md"
+        (cmds_dir / fname).write_text(
             "---\ndescription: Test command\n---\n\n# Test\n\nBody.\n"
         )
 
@@ -448,7 +477,100 @@ class TestInstallAiSkills:
         assert expected_skill_name in skill_dirs
         assert (skills_dir / expected_skill_name / "SKILL.md").exists()
 
+    def test_copilot_ignores_non_speckit_agents(self, project_dir):
+        """Non-speckit markdown in .github/agents/ must not produce skills."""
+        agents_dir = project_dir / ".github" / "agents"
+        agents_dir.mkdir(parents=True, exist_ok=True)
+        (agents_dir / "speckit.plan.agent.md").write_text(
+            "---\ndescription: Generate implementation plan.\n---\n\n# Plan\n\nBody.\n"
+        )
+        (agents_dir / "my-custom-agent.agent.md").write_text(
+            "---\ndescription: A user custom agent\n---\n\n# Custom\n\nBody.\n"
+        )
 
+        result = install_ai_skills(project_dir, "copilot")
+
+        assert result is True
+        skills_dir = _get_skills_dir(project_dir, "copilot")
+        assert skills_dir.exists()
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        assert "speckit-plan" in skill_dirs
+        assert "speckit-my-custom-agent.agent" not in skill_dirs
+        assert "speckit-my-custom-agent" not in skill_dirs
+
+    @pytest.mark.parametrize("agent_key,custom_file", [
+        ("claude", "review.md"),
+        ("cursor-agent", "deploy.md"),
+        ("qwen", "my-workflow.md"),
+    ])
+    def test_non_speckit_commands_ignored_for_all_agents(self, temp_dir, agent_key, custom_file):
+        """User-authored command files must not produce skills for any agent."""
+        proj = temp_dir / f"proj-{agent_key}"
+        proj.mkdir()
+
+        agent_folder = AGENT_CONFIG[agent_key]["folder"]
+        commands_subdir = AGENT_CONFIG[agent_key].get("commands_subdir", "commands")
+        cmds_dir = proj / agent_folder.rstrip("/") / commands_subdir
+        cmds_dir.mkdir(parents=True)
+        (cmds_dir / "speckit.specify.md").write_text(
+            "---\ndescription: Create spec.\n---\n\n# Specify\n\nBody.\n"
+        )
+        (cmds_dir / custom_file).write_text(
+            "---\ndescription: User custom command\n---\n\n# Custom\n\nBody.\n"
+        )
+
+        result = install_ai_skills(proj, agent_key)
+
+        assert result is True
+        skills_dir = _get_skills_dir(proj, agent_key)
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        assert "speckit-specify" in skill_dirs
+        custom_stem = Path(custom_file).stem
+        assert f"speckit-{custom_stem}" not in skill_dirs
+
+    def test_copilot_fallback_when_only_non_speckit_agents(self, project_dir):
+        """Fallback to templates/commands/ when .github/agents/ has no speckit.*.md files."""
+        agents_dir = project_dir / ".github" / "agents"
+        agents_dir.mkdir(parents=True, exist_ok=True)
+        # Only a user-authored agent, no speckit.* templates
+        (agents_dir / "my-custom-agent.agent.md").write_text(
+            "---\ndescription: A user custom agent\n---\n\n# Custom\n\nBody.\n"
+        )
+
+        result = install_ai_skills(project_dir, "copilot")
+
+        # Should succeed via fallback to templates/commands/
+        assert result is True
+        skills_dir = _get_skills_dir(project_dir, "copilot")
+        assert skills_dir.exists()
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        # Should have skills from fallback templates, not from the custom agent
+        assert "speckit-plan" in skill_dirs
+        assert not any("my-custom" in d for d in skill_dirs)
+
+    @pytest.mark.parametrize("agent_key", ["claude", "cursor-agent", "qwen"])
+    def test_fallback_when_only_non_speckit_commands(self, temp_dir, agent_key):
+        """Fallback to templates/commands/ when agent dir has no speckit.*.md files."""
+        proj = temp_dir / f"proj-{agent_key}"
+        proj.mkdir()
+
+        agent_folder = AGENT_CONFIG[agent_key]["folder"]
+        commands_subdir = AGENT_CONFIG[agent_key].get("commands_subdir", "commands")
+        cmds_dir = proj / agent_folder.rstrip("/") / commands_subdir
+        cmds_dir.mkdir(parents=True)
+        # Only a user-authored command, no speckit.* templates
+        (cmds_dir / "my-custom-command.md").write_text(
+            "---\ndescription: User custom command\n---\n\n# Custom\n\nBody.\n"
+        )
+
+        result = install_ai_skills(proj, agent_key)
+
+        # Should succeed via fallback to templates/commands/
+        assert result is True
+        skills_dir = _get_skills_dir(proj, agent_key)
+        assert skills_dir.exists()
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        assert not any("my-custom" in d for d in skill_dirs)
 
 class TestCommandCoexistence:
     """Verify install_ai_skills never touches command files.
@@ -460,14 +582,16 @@ class TestCommandCoexistence:
 
     def test_existing_commands_preserved_claude(self, project_dir, templates_dir, commands_dir_claude):
         """install_ai_skills must NOT remove pre-existing .claude/commands files."""
-        # Verify commands exist before
-        assert len(list(commands_dir_claude.glob("speckit.*"))) == 3
+        # Verify commands exist before (templates_dir adds 4 speckit.* files,
+        # commands_dir_claude overlaps with 3 of them)
+        before = list(commands_dir_claude.glob("speckit.*"))
+        assert len(before) >= 3
 
         install_ai_skills(project_dir, "claude")
 
         # Commands must still be there — install_ai_skills never touches them
         remaining = list(commands_dir_claude.glob("speckit.*"))
-        assert len(remaining) == 3
+        assert len(remaining) == len(before)
 
     def test_existing_commands_preserved_gemini(self, project_dir, templates_dir, commands_dir_gemini):
         """install_ai_skills must NOT remove pre-existing .gemini/commands files."""

tests/test_extensions.py

@@ -26,6 +26,7 @@ from specify_cli.extensions import (
     ExtensionError,
     ValidationError,
     CompatibilityError,
+    normalize_priority,
     version_satisfies,
 )
 
@@ -121,6 +122,57 @@ def project_dir(temp_dir):
     return proj_dir
 
 
+# ===== normalize_priority Tests =====
+
+class TestNormalizePriority:
+    """Test normalize_priority helper function."""
+
+    def test_valid_integer(self):
+        """Test with valid integer priority."""
+        assert normalize_priority(5) == 5
+        assert normalize_priority(1) == 1
+        assert normalize_priority(100) == 100
+
+    def test_valid_string_number(self):
+        """Test with string that can be converted to int."""
+        assert normalize_priority("5") == 5
+        assert normalize_priority("10") == 10
+
+    def test_zero_returns_default(self):
+        """Test that zero priority returns default."""
+        assert normalize_priority(0) == 10
+        assert normalize_priority(0, default=5) == 5
+
+    def test_negative_returns_default(self):
+        """Test that negative priority returns default."""
+        assert normalize_priority(-1) == 10
+        assert normalize_priority(-100, default=5) == 5
+
+    def test_none_returns_default(self):
+        """Test that None returns default."""
+        assert normalize_priority(None) == 10
+        assert normalize_priority(None, default=5) == 5
+
+    def test_invalid_string_returns_default(self):
+        """Test that non-numeric string returns default."""
+        assert normalize_priority("invalid") == 10
+        assert normalize_priority("abc", default=5) == 5
+
+    def test_float_truncates(self):
+        """Test that float is truncated to int."""
+        assert normalize_priority(5.9) == 5
+        assert normalize_priority(3.1) == 3
+
+    def test_empty_string_returns_default(self):
+        """Test that empty string returns default."""
+        assert normalize_priority("") == 10
+
+    def test_custom_default(self):
+        """Test custom default value."""
+        assert normalize_priority(None, default=20) == 20
+        assert normalize_priority("invalid", default=1) == 1
+
+
 # ===== ExtensionManifest Tests =====
 
 class TestExtensionManifest:
@@ -368,6 +420,48 @@ class TestExtensionRegistry:
         assert registry.is_installed("test-ext")
         assert registry.get("test-ext")["version"] == "1.0.0"
 
+    def test_restore_rejects_none_metadata(self, temp_dir):
+        """Test restore() raises ValueError for None metadata."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+        registry = ExtensionRegistry(extensions_dir)
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-ext", None)
+
+    def test_restore_rejects_non_dict_metadata(self, temp_dir):
+        """Test restore() raises ValueError for non-dict metadata."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+        registry = ExtensionRegistry(extensions_dir)
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-ext", "not-a-dict")
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-ext", ["list", "not", "dict"])
+
+    def test_restore_uses_deep_copy(self, temp_dir):
+        """Test restore() deep copies metadata to prevent mutation."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+        registry = ExtensionRegistry(extensions_dir)
+
+        original_metadata = {
+            "version": "1.0.0",
+            "nested": {"key": "original"},
+        }
+        registry.restore("test-ext", original_metadata)
+
+        # Mutate the original metadata after restore
+        original_metadata["version"] = "MUTATED"
+        original_metadata["nested"]["key"] = "MUTATED"
+
+        # Registry should have the original values
+        stored = registry.get("test-ext")
+        assert stored["version"] == "1.0.0"
+        assert stored["nested"]["key"] == "original"
+
     def test_get_returns_deep_copy(self, temp_dir):
         """Test that get() returns deep copies for nested structures."""
         extensions_dir = temp_dir / "extensions"
@@ -387,6 +481,26 @@ class TestExtensionRegistry:
         internal = registry.data["extensions"]["test-ext"]
         assert internal["registered_commands"] == {"claude": ["cmd1"]}
 
+    def test_get_returns_none_for_corrupted_entry(self, temp_dir):
+        """Test that get() returns None for corrupted (non-dict) entries."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+
+        # Directly corrupt the registry with non-dict entries
+        registry.data["extensions"]["corrupted-string"] = "not a dict"
+        registry.data["extensions"]["corrupted-list"] = ["not", "a", "dict"]
+        registry.data["extensions"]["corrupted-int"] = 42
+        registry._save()
+
+        # All corrupted entries should return None
+        assert registry.get("corrupted-string") is None
+        assert registry.get("corrupted-list") is None
+        assert registry.get("corrupted-int") is None
+        # Non-existent should also return None
+        assert registry.get("nonexistent") is None
+
     def test_list_returns_deep_copy(self, temp_dir):
         """Test that list() returns deep copies for nested structures."""
         extensions_dir = temp_dir / "extensions"
@@ -406,6 +520,20 @@ class TestExtensionRegistry:
         internal = registry.data["extensions"]["test-ext"]
         assert internal["registered_commands"] == {"claude": ["cmd1"]}
 
+    def test_list_returns_empty_dict_for_corrupted_registry(self, temp_dir):
+        """Test that list() returns empty dict when extensions is not a dict."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+        registry = ExtensionRegistry(extensions_dir)
+
+        # Corrupt the registry - extensions is a list instead of dict
+        registry.data["extensions"] = ["not", "a", "dict"]
+        registry._save()
+
+        # list() should return empty dict, not crash
+        result = registry.list()
+        assert result == {}
+
 
 # ===== ExtensionManager Tests =====
 
@@ -541,6 +669,15 @@ class TestCommandRegistrar:
         assert "codex" in CommandRegistrar.AGENT_CONFIGS
         assert CommandRegistrar.AGENT_CONFIGS["codex"]["dir"] == ".codex/prompts"
 
+    def test_pi_agent_config_present(self):
+        """Pi should be mapped to .pi/prompts."""
+        assert "pi" in CommandRegistrar.AGENT_CONFIGS
+        cfg = CommandRegistrar.AGENT_CONFIGS["pi"]
+        assert cfg["dir"] == ".pi/prompts"
+        assert cfg["format"] == "markdown"
+        assert cfg["args"] == "$ARGUMENTS"
+        assert cfg["extension"] == ".md"
+
     def test_qwen_agent_config_is_markdown(self):
         """Qwen should use Markdown format with $ARGUMENTS (not TOML)."""
         assert "qwen" in CommandRegistrar.AGENT_CONFIGS
@@ -2337,3 +2474,439 @@ class TestExtensionUpdateCLI:
 
         for cmd_file in command_files:
             assert cmd_file.exists(), f"Expected command file to be restored after rollback: {cmd_file}"
+
+
+class TestExtensionListCLI:
+    """Test extension list CLI output format."""
+
+    def test_list_shows_extension_id(self, extension_dir, project_dir):
+        """extension list should display the extension ID."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install the extension using the manager
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "list"])
+
+        assert result.exit_code == 0, result.output
+        # Verify the extension ID is shown in the output
+        assert "test-ext" in result.output
+        # Verify name and version are also shown
+        assert "Test Extension" in result.output
+        assert "1.0.0" in result.output
+
+
+class TestExtensionPriority:
+    """Test extension priority-based resolution."""
+
+    def test_list_by_priority_empty(self, temp_dir):
+        """Test list_by_priority on empty registry."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        result = registry.list_by_priority()
+
+        assert result == []
+
+    def test_list_by_priority_single(self, temp_dir):
+        """Test list_by_priority with single extension."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {"version": "1.0.0", "priority": 5})
+
+        result = registry.list_by_priority()
+
+        assert len(result) == 1
+        assert result[0][0] == "test-ext"
+        assert result[0][1]["priority"] == 5
+
+    def test_list_by_priority_ordering(self, temp_dir):
+        """Test list_by_priority returns extensions sorted by priority."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        # Add in non-priority order
+        registry.add("ext-low", {"version": "1.0.0", "priority": 20})
+        registry.add("ext-high", {"version": "1.0.0", "priority": 1})
+        registry.add("ext-mid", {"version": "1.0.0", "priority": 10})
+
+        result = registry.list_by_priority()
+
+        assert len(result) == 3
+        # Lower priority number = higher precedence (first)
+        assert result[0][0] == "ext-high"
+        assert result[1][0] == "ext-mid"
+        assert result[2][0] == "ext-low"
+
+    def test_list_by_priority_default(self, temp_dir):
+        """Test list_by_priority uses default priority of 10."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        # Add without explicit priority
+        registry.add("ext-default", {"version": "1.0.0"})
+        registry.add("ext-high", {"version": "1.0.0", "priority": 1})
+        registry.add("ext-low", {"version": "1.0.0", "priority": 20})
+
+        result = registry.list_by_priority()
+
+        assert len(result) == 3
+        # ext-high (1), ext-default (10), ext-low (20)
+        assert result[0][0] == "ext-high"
+        assert result[1][0] == "ext-default"
+        assert result[2][0] == "ext-low"
+
+    def test_list_by_priority_invalid_priority_defaults(self, temp_dir):
+        """Malformed priority values fall back to the default priority."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("ext-high", {"version": "1.0.0", "priority": 1})
+        registry.data["extensions"]["ext-invalid"] = {
+            "version": "1.0.0",
+            "priority": "high",
+        }
+        registry._save()
+
+        result = registry.list_by_priority()
+
+        assert [item[0] for item in result] == ["ext-high", "ext-invalid"]
+        assert result[1][1]["priority"] == 10
+
+    def test_list_by_priority_excludes_disabled(self, temp_dir):
+        """Test that list_by_priority excludes disabled extensions by default."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("ext-enabled", {"version": "1.0.0", "enabled": True, "priority": 5})
+        registry.add("ext-disabled", {"version": "1.0.0", "enabled": False, "priority": 1})
+        registry.add("ext-default", {"version": "1.0.0", "priority": 10})  # no enabled field = True
+
+        # Default: exclude disabled
+        by_priority = registry.list_by_priority()
+        ext_ids = [p[0] for p in by_priority]
+        assert "ext-enabled" in ext_ids
+        assert "ext-default" in ext_ids
+        assert "ext-disabled" not in ext_ids
+
+    def test_list_by_priority_includes_disabled_when_requested(self, temp_dir):
+        """Test that list_by_priority includes disabled extensions when requested."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("ext-enabled", {"version": "1.0.0", "enabled": True, "priority": 5})
+        registry.add("ext-disabled", {"version": "1.0.0", "enabled": False, "priority": 1})
+
+        # Include disabled
+        by_priority = registry.list_by_priority(include_disabled=True)
+        ext_ids = [p[0] for p in by_priority]
+        assert "ext-enabled" in ext_ids
+        assert "ext-disabled" in ext_ids
+        # Disabled ext has lower priority number, so it comes first when included
+        assert ext_ids[0] == "ext-disabled"
+
+    def test_install_with_priority(self, extension_dir, project_dir):
+        """Test that install_from_directory stores priority."""
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False, priority=5)
+
+        metadata = manager.registry.get("test-ext")
+        assert metadata["priority"] == 5
+
+    def test_install_default_priority(self, extension_dir, project_dir):
+        """Test that install_from_directory uses default priority of 10."""
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        metadata = manager.registry.get("test-ext")
+        assert metadata["priority"] == 10
+
+    def test_list_installed_includes_priority(self, extension_dir, project_dir):
+        """Test that list_installed includes priority in returned data."""
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False, priority=3)
+
+        installed = manager.list_installed()
+
+        assert len(installed) == 1
+        assert installed[0]["priority"] == 3
+
+    def test_priority_preserved_on_update(self, temp_dir):
+        """Test that registry update preserves priority."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {"version": "1.0.0", "priority": 5, "enabled": True})
+
+        # Update with new metadata (no priority specified)
+        registry.update("test-ext", {"enabled": False})
+
+        updated = registry.get("test-ext")
+        assert updated["priority"] == 5  # Preserved
+        assert updated["enabled"] is False  # Updated
+
+    def test_corrupted_extension_entry_not_picked_up_as_unregistered(self, project_dir):
+        """Corrupted registry entries are still tracked and NOT picked up as unregistered."""
+        extensions_dir = project_dir / ".specify" / "extensions"
+
+        valid_dir = extensions_dir / "valid-ext" / "templates"
+        valid_dir.mkdir(parents=True)
+        (valid_dir / "other-template.md").write_text("# Valid\n")
+
+        broken_dir = extensions_dir / "broken-ext" / "templates"
+        broken_dir.mkdir(parents=True)
+        (broken_dir / "target-template.md").write_text("# Broken Target\n")
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("valid-ext", {"version": "1.0.0", "priority": 10})
+        # Corrupt the entry - should still be tracked, not picked up as unregistered
+        registry.data["extensions"]["broken-ext"] = "corrupted"
+        registry._save()
+
+        from specify_cli.presets import PresetResolver
+
+        resolver = PresetResolver(project_dir)
+        # Corrupted extension templates should NOT be resolved
+        resolved = resolver.resolve("target-template")
+        assert resolved is None
+
+        # Valid extension template should still resolve
+        valid_resolved = resolver.resolve("other-template")
+        assert valid_resolved is not None
+        assert "Valid" in valid_resolved.read_text()
+
+
+class TestExtensionPriorityCLI:
+    """Test extension priority CLI integration."""
+
+    def test_add_with_priority_option(self, extension_dir, project_dir):
+        """Test extension add command with --priority option."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, [
+                "extension", "add", str(extension_dir), "--dev", "--priority", "3"
+            ])
+
+        assert result.exit_code == 0, result.output
+
+        manager = ExtensionManager(project_dir)
+        metadata = manager.registry.get("test-ext")
+        assert metadata["priority"] == 3
+
+    def test_list_shows_priority(self, extension_dir, project_dir):
+        """Test extension list shows priority."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install extension with priority
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False, priority=7)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "list"])
+
+        assert result.exit_code == 0, result.output
+        assert "Priority: 7" in result.output
+
+    def test_set_priority_changes_priority(self, extension_dir, project_dir):
+        """Test set-priority command changes extension priority."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install extension with default priority
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        # Verify default priority
+        assert manager.registry.get("test-ext")["priority"] == 10
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "set-priority", "test-ext", "5"])
+
+        assert result.exit_code == 0, result.output
+        assert "priority changed: 10 → 5" in result.output
+
+        # Reload registry to see updated value
+        manager2 = ExtensionManager(project_dir)
+        assert manager2.registry.get("test-ext")["priority"] == 5
+
+    def test_set_priority_same_value_no_change(self, extension_dir, project_dir):
+        """Test set-priority with same value shows already set message."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install extension with priority 5
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False, priority=5)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "set-priority", "test-ext", "5"])
+
+        assert result.exit_code == 0, result.output
+        assert "already has priority 5" in result.output
+
+    def test_set_priority_invalid_value(self, extension_dir, project_dir):
+        """Test set-priority rejects invalid priority values."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install extension
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "set-priority", "test-ext", "0"])
+
+        assert result.exit_code == 1, result.output
+        assert "Priority must be a positive integer" in result.output
+
+    def test_set_priority_not_installed(self, project_dir):
+        """Test set-priority fails for non-installed extension."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Ensure .specify exists
+        (project_dir / ".specify").mkdir(parents=True, exist_ok=True)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "set-priority", "nonexistent", "5"])
+
+        assert result.exit_code == 1, result.output
+        assert "not installed" in result.output.lower() or "no extensions installed" in result.output.lower()
+
+    def test_set_priority_by_display_name(self, extension_dir, project_dir):
+        """Test set-priority works with extension display name."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install extension
+        manager = ExtensionManager(project_dir)
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        # Use display name "Test Extension" instead of ID "test-ext"
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["extension", "set-priority", "Test Extension", "3"])
+
+        assert result.exit_code == 0, result.output
+        assert "priority changed" in result.output
+
+        # Reload registry to see updated value
+        manager2 = ExtensionManager(project_dir)
+        assert manager2.registry.get("test-ext")["priority"] == 3
+
+
+class TestExtensionPriorityBackwardsCompatibility:
+    """Test backwards compatibility for extensions installed before priority feature."""
+
+    def test_legacy_extension_without_priority_field(self, temp_dir):
+        """Extensions installed before priority feature should default to 10."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        # Simulate legacy registry entry without priority field
+        registry = ExtensionRegistry(extensions_dir)
+        registry.data["extensions"]["legacy-ext"] = {
+            "version": "1.0.0",
+            "source": "local",
+            "enabled": True,
+            "installed_at": "2025-01-01T00:00:00Z",
+            # No "priority" field - simulates pre-feature extension
+        }
+        registry._save()
+
+        # Reload registry
+        registry2 = ExtensionRegistry(extensions_dir)
+
+        # list_by_priority should use default of 10
+        result = registry2.list_by_priority()
+        assert len(result) == 1
+        assert result[0][0] == "legacy-ext"
+        # Priority defaults to 10 and is normalized in returned metadata
+        assert result[0][1]["priority"] == 10
+
+    def test_legacy_extension_in_list_installed(self, extension_dir, project_dir):
+        """list_installed returns priority=10 for legacy extensions without priority field."""
+        manager = ExtensionManager(project_dir)
+
+        # Install extension normally
+        manager.install_from_directory(extension_dir, "0.1.0", register_commands=False)
+
+        # Manually remove priority to simulate legacy extension
+        ext_data = manager.registry.data["extensions"]["test-ext"]
+        del ext_data["priority"]
+        manager.registry._save()
+
+        # list_installed should still return priority=10
+        installed = manager.list_installed()
+        assert len(installed) == 1
+        assert installed[0]["priority"] == 10
+
+    def test_mixed_legacy_and_new_extensions_ordering(self, temp_dir):
+        """Legacy extensions (no priority) sort with default=10 among prioritized extensions."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+
+        # Add extension with explicit priority=5
+        registry.add("ext-with-priority", {"version": "1.0.0", "priority": 5})
+
+        # Add legacy extension without priority (manually)
+        registry.data["extensions"]["legacy-ext"] = {
+            "version": "1.0.0",
+            "source": "local",
+            "enabled": True,
+            # No priority field
+        }
+        registry._save()
+
+        # Add extension with priority=15
+        registry.add("ext-low-priority", {"version": "1.0.0", "priority": 15})
+
+        # Reload and check ordering
+        registry2 = ExtensionRegistry(extensions_dir)
+        result = registry2.list_by_priority()
+
+        assert len(result) == 3
+        # Order: ext-with-priority (5), legacy-ext (defaults to 10), ext-low-priority (15)
+        assert result[0][0] == "ext-with-priority"
+        assert result[1][0] == "legacy-ext"
+        assert result[2][0] == "ext-low-priority"

tests/test_merge.py

@@ -0,0 +1,190 @@
+import stat
+
+from specify_cli import merge_json_files
+from specify_cli import handle_vscode_settings
+
+# --- Dimension 2: Polite Deep Merge Strategy ---
+
+def test_merge_json_files_type_mismatch_preservation(tmp_path):
+    """If user has a string but template wants a dict, PRESERVE user's string."""
+    existing_file = tmp_path / "settings.json"
+    # User might have overridden a setting with a simple string or different type
+    existing_file.write_text('{"chat.editor.fontFamily": "CustomFont"}')
+    
+    # Template might expect a dict for the same key (hypothetically)
+    new_settings = {
+        "chat.editor.fontFamily": {"font": "TemplateFont"}
+    }
+    
+    merged = merge_json_files(existing_file, new_settings)
+    # Result is None because user settings were preserved and nothing else changed
+    assert merged is None
+
+def test_merge_json_files_deep_nesting(tmp_path):
+    """Verify deep recursive merging of new keys."""
+    existing_file = tmp_path / "settings.json"
+    existing_file.write_text("""
+    {
+        "a": {
+            "b": {
+                "c": 1
+            }
+        }
+    }
+    """)
+    
+    new_settings = {
+        "a": {
+            "b": {
+                "d": 2  # New nested key
+            },
+            "e": 3      # New mid-level key
+        }
+    }
+    
+    merged = merge_json_files(existing_file, new_settings)
+    assert merged["a"]["b"]["c"] == 1
+    assert merged["a"]["b"]["d"] == 2
+    assert merged["a"]["e"] == 3
+
+def test_merge_json_files_empty_existing(tmp_path):
+    """Merging into an empty/new file."""
+    existing_file = tmp_path / "empty.json"
+    existing_file.write_text("{}")
+    
+    new_settings = {"a": 1}
+    merged = merge_json_files(existing_file, new_settings)
+    assert merged == {"a": 1}
+
+# --- Dimension 3: Real-world Simulation ---
+
+def test_merge_vscode_realistic_scenario(tmp_path):
+    """A realistic VSCode settings.json with many existing preferences, comments, and trailing commas."""
+    existing_file = tmp_path / "vscode_settings.json"
+    existing_file.write_text("""
+    {
+        "editor.fontSize": 12,
+        "editor.formatOnSave": true, /* block comment */
+        "files.exclude": {
+            "**/.git": true,
+            "**/node_modules": true,
+        },
+        "chat.promptFilesRecommendations": {
+            "existing.tool": true,
+        } // User comment
+    }
+    """)
+    
+    template_settings = {
+        "chat.promptFilesRecommendations": {
+            "speckit.specify": True,
+            "speckit.plan": True
+        },
+        "chat.tools.terminal.autoApprove": {
+            ".specify/scripts/bash/": True
+        }
+    }
+    
+    merged = merge_json_files(existing_file, template_settings)
+    
+    # Check preservation
+    assert merged["editor.fontSize"] == 12
+    assert merged["files.exclude"]["**/.git"] is True
+    assert merged["chat.promptFilesRecommendations"]["existing.tool"] is True
+    
+    # Check additions
+    assert merged["chat.promptFilesRecommendations"]["speckit.specify"] is True
+    assert merged["chat.tools.terminal.autoApprove"][".specify/scripts/bash/"] is True
+
+# --- Dimension 4: Error Handling & Robustness ---
+
+def test_merge_json_files_with_bom(tmp_path):
+    """Test files with UTF-8 BOM (sometimes created on Windows)."""
+    existing_file = tmp_path / "bom.json"
+    content = '{"a": 1}'
+    # Prepend UTF-8 BOM
+    existing_file.write_bytes(b'\xef\xbb\xbf' + content.encode('utf-8'))
+    
+    new_settings = {"b": 2}
+    merged = merge_json_files(existing_file, new_settings)
+    assert merged == {"a": 1, "b": 2}
+
+def test_merge_json_files_not_a_dictionary_template(tmp_path):
+    """If for some reason new_content is not a dict, PRESERVE existing settings by returning None."""
+    existing_file = tmp_path / "ok.json"
+    existing_file.write_text('{"a": 1}')
+    
+    # Secure fallback: return None to skip writing and avoid clobbering
+    assert merge_json_files(existing_file, ["not", "a", "dict"]) is None
+
+def test_merge_json_files_unparseable_existing(tmp_path):
+    """If the existing file is unparseable JSON, return None to avoid overwriting it."""
+    bad_file = tmp_path / "bad.json"
+    bad_file.write_text('{"a": 1, missing_value}') # Invalid JSON
+    
+    assert merge_json_files(bad_file, {"b": 2}) is None
+
+
+def test_merge_json_files_list_preservation(tmp_path):
+    """Verify that existing list values are preserved and NOT merged or overwritten."""
+    existing_file = tmp_path / "list.json"
+    existing_file.write_text('{"my.list": ["user_item"]}')
+    
+    template_settings = {
+        "my.list": ["template_item"]
+    }
+    
+    merged = merge_json_files(existing_file, template_settings)
+    # The polite merge policy says: keep existing values if they exist and aren't both dicts.
+    # Since nothing changed, it returns None.
+    assert merged is None
+
+def test_merge_json_files_no_changes(tmp_path):
+    """If the merge doesn't introduce any new keys or changes, return None to skip rewrite."""
+    existing_file = tmp_path / "no_change.json"
+    existing_file.write_text('{"a": 1, "b": {"c": 2}}')
+    
+    template_settings = {
+        "a": 1,          # Already exists
+        "b": {"c": 2}    # Already exists nested
+    }
+    
+    # Should return None because result == existing
+    assert merge_json_files(existing_file, template_settings) is None
+
+def test_merge_json_files_type_mismatch_no_op(tmp_path):
+    """If a key exists with different type and we preserve it, it might still result in no change."""
+    existing_file = tmp_path / "mismatch_no_op.json"
+    existing_file.write_text('{"a": "user_string"}')
+    
+    template_settings = {
+        "a": {"key": "template_dict"} # Mismatch, will be ignored
+    }
+    
+    # Should return None because we preserved the user's string and nothing else changed
+    assert merge_json_files(existing_file, template_settings) is None
+
+
+def test_handle_vscode_settings_preserves_mode_on_atomic_write(tmp_path):
+    """Atomic rewrite should preserve existing file mode bits."""
+    vscode_dir = tmp_path / ".vscode"
+    vscode_dir.mkdir()
+    dest_file = vscode_dir / "settings.json"
+    template_file = tmp_path / "template_settings.json"
+
+    dest_file.write_text('{"a": 1}\n', encoding="utf-8")
+    dest_file.chmod(0o640)
+    before_mode = stat.S_IMODE(dest_file.stat().st_mode)
+
+    template_file.write_text('{"b": 2}\n', encoding="utf-8")
+
+    handle_vscode_settings(
+        template_file,
+        dest_file,
+        "settings.json",
+        verbose=False,
+        tracker=None,
+    )
+
+    after_mode = stat.S_IMODE(dest_file.stat().st_mode)
+    assert after_mode == before_mode

tests/test_presets.py

@@ -32,6 +32,7 @@ from specify_cli.presets import (
     PresetCompatibilityError,
     VALID_PRESET_TEMPLATE_TYPES,
 )
+from specify_cli.extensions import ExtensionRegistry
 
 
 # ===== Fixtures =====
@@ -368,6 +369,172 @@ class TestPresetRegistry:
         registry = PresetRegistry(packs_dir)
         assert registry.get("nonexistent") is None
 
+    def test_restore(self, temp_dir):
+        """Test restore() preserves timestamps exactly."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        # Create original entry with a specific timestamp
+        original_metadata = {
+            "version": "1.0.0",
+            "source": "local",
+            "installed_at": "2025-01-15T10:30:00+00:00",
+            "enabled": True,
+        }
+        registry.restore("test-pack", original_metadata)
+
+        # Verify exact restoration
+        restored = registry.get("test-pack")
+        assert restored["installed_at"] == "2025-01-15T10:30:00+00:00"
+        assert restored["version"] == "1.0.0"
+        assert restored["enabled"] is True
+
+    def test_restore_rejects_none_metadata(self, temp_dir):
+        """Test restore() raises ValueError for None metadata."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-pack", None)
+
+    def test_restore_rejects_non_dict_metadata(self, temp_dir):
+        """Test restore() raises ValueError for non-dict metadata."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-pack", "not-a-dict")
+
+        with pytest.raises(ValueError, match="metadata must be a dict"):
+            registry.restore("test-pack", ["list", "not", "dict"])
+
+    def test_restore_uses_deep_copy(self, temp_dir):
+        """Test restore() deep copies metadata to prevent mutation."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        original_metadata = {
+            "version": "1.0.0",
+            "nested": {"key": "original"},
+        }
+        registry.restore("test-pack", original_metadata)
+
+        # Mutate the original metadata after restore
+        original_metadata["version"] = "MUTATED"
+        original_metadata["nested"]["key"] = "MUTATED"
+
+        # Registry should have the original values
+        stored = registry.get("test-pack")
+        assert stored["version"] == "1.0.0"
+        assert stored["nested"]["key"] == "original"
+
+    def test_get_returns_deep_copy(self, temp_dir):
+        """Test that get() returns a deep copy to prevent mutation."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        registry.add("test-pack", {"version": "1.0.0", "nested": {"key": "original"}})
+
+        # Get and mutate the returned copy
+        metadata = registry.get("test-pack")
+        metadata["version"] = "MUTATED"
+        metadata["nested"]["key"] = "MUTATED"
+
+        # Original should be unchanged
+        fresh = registry.get("test-pack")
+        assert fresh["version"] == "1.0.0"
+        assert fresh["nested"]["key"] == "original"
+
+    def test_get_returns_none_for_corrupted_entry(self, temp_dir):
+        """Test that get() returns None for corrupted (non-dict) entries."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        # Directly corrupt the registry with non-dict entries
+        registry.data["presets"]["corrupted-string"] = "not a dict"
+        registry.data["presets"]["corrupted-list"] = ["not", "a", "dict"]
+        registry.data["presets"]["corrupted-int"] = 42
+        registry._save()
+
+        # All corrupted entries should return None
+        assert registry.get("corrupted-string") is None
+        assert registry.get("corrupted-list") is None
+        assert registry.get("corrupted-int") is None
+        # Non-existent should also return None
+        assert registry.get("nonexistent") is None
+
+    def test_list_returns_deep_copy(self, temp_dir):
+        """Test that list() returns deep copies to prevent mutation."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        registry.add("test-pack", {"version": "1.0.0", "nested": {"key": "original"}})
+
+        # Get list and mutate
+        all_packs = registry.list()
+        all_packs["test-pack"]["version"] = "MUTATED"
+        all_packs["test-pack"]["nested"]["key"] = "MUTATED"
+
+        # Original should be unchanged
+        fresh = registry.get("test-pack")
+        assert fresh["version"] == "1.0.0"
+        assert fresh["nested"]["key"] == "original"
+
+    def test_list_returns_empty_dict_for_corrupted_registry(self, temp_dir):
+        """Test that list() returns empty dict when presets is not a dict."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        # Corrupt the registry - presets is a list instead of dict
+        registry.data["presets"] = ["not", "a", "dict"]
+        registry._save()
+
+        # list() should return empty dict, not crash
+        result = registry.list()
+        assert result == {}
+
+    def test_list_by_priority_excludes_disabled(self, temp_dir):
+        """Test that list_by_priority excludes disabled presets by default."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        registry.add("pack-enabled", {"version": "1.0.0", "enabled": True, "priority": 5})
+        registry.add("pack-disabled", {"version": "1.0.0", "enabled": False, "priority": 1})
+        registry.add("pack-default", {"version": "1.0.0", "priority": 10})  # no enabled field = True
+
+        # Default: exclude disabled
+        by_priority = registry.list_by_priority()
+        pack_ids = [p[0] for p in by_priority]
+        assert "pack-enabled" in pack_ids
+        assert "pack-default" in pack_ids
+        assert "pack-disabled" not in pack_ids
+
+    def test_list_by_priority_includes_disabled_when_requested(self, temp_dir):
+        """Test that list_by_priority includes disabled presets when requested."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        registry.add("pack-enabled", {"version": "1.0.0", "enabled": True, "priority": 5})
+        registry.add("pack-disabled", {"version": "1.0.0", "enabled": False, "priority": 1})
+
+        # Include disabled
+        by_priority = registry.list_by_priority(include_disabled=True)
+        pack_ids = [p[0] for p in by_priority]
+        assert "pack-enabled" in pack_ids
+        assert "pack-disabled" in pack_ids
+        # Disabled pack has lower priority number, so it comes first when included
+        assert pack_ids[0] == "pack-disabled"
+
 
 # ===== PresetManager Tests =====
 
@@ -573,6 +740,24 @@ class TestRegistryPriority:
         assert sorted_packs[0][0] == "pack-b"
         assert sorted_packs[1][0] == "pack-a"
 
+    def test_list_by_priority_invalid_priority_defaults(self, temp_dir):
+        """Malformed priority values fall back to the default priority."""
+        packs_dir = temp_dir / "packs"
+        packs_dir.mkdir()
+        registry = PresetRegistry(packs_dir)
+
+        registry.add("pack-high", {"version": "1.0.0", "priority": 1})
+        registry.data["presets"]["pack-invalid"] = {
+            "version": "1.0.0",
+            "priority": "high",
+        }
+        registry._save()
+
+        sorted_packs = registry.list_by_priority()
+
+        assert [item[0] for item in sorted_packs] == ["pack-high", "pack-invalid"]
+        assert sorted_packs[1][1]["priority"] == 10
+
 
 # ===== PresetResolver Tests =====
 
@@ -678,11 +863,54 @@ class TestPresetResolver:
         ext_template = ext_templates_dir / "custom-template.md"
         ext_template.write_text("# Extension Custom Template\n")
 
+        # Register extension in registry
+        extensions_dir = project_dir / ".specify" / "extensions"
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("my-ext", {"version": "1.0.0", "priority": 10})
+
         resolver = PresetResolver(project_dir)
         result = resolver.resolve("custom-template")
         assert result is not None
         assert "Extension Custom Template" in result.read_text()
 
+    def test_resolve_disabled_extension_templates_skipped(self, project_dir):
+        """Test that disabled extension templates are not resolved."""
+        # Create extension with templates
+        ext_dir = project_dir / ".specify" / "extensions" / "disabled-ext"
+        ext_templates_dir = ext_dir / "templates"
+        ext_templates_dir.mkdir(parents=True)
+        ext_template = ext_templates_dir / "disabled-template.md"
+        ext_template.write_text("# Disabled Extension Template\n")
+
+        # Register extension as disabled
+        extensions_dir = project_dir / ".specify" / "extensions"
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("disabled-ext", {"version": "1.0.0", "priority": 1, "enabled": False})
+
+        # Template should NOT be resolved because extension is disabled
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve("disabled-template")
+        assert result is None, "Disabled extension template should not be resolved"
+
+    def test_resolve_disabled_extension_not_picked_up_as_unregistered(self, project_dir):
+        """Test that disabled extensions are not picked up via unregistered dir scan."""
+        # Create extension directory with templates
+        ext_dir = project_dir / ".specify" / "extensions" / "test-disabled-ext"
+        ext_templates_dir = ext_dir / "templates"
+        ext_templates_dir.mkdir(parents=True)
+        ext_template = ext_templates_dir / "unique-disabled-template.md"
+        ext_template.write_text("# Should Not Resolve\n")
+
+        # Register the extension but disable it
+        extensions_dir = project_dir / ".specify" / "extensions"
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("test-disabled-ext", {"version": "1.0.0", "enabled": False})
+
+        # Verify the template is NOT resolved (even though the directory exists)
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve("unique-disabled-template")
+        assert result is None, "Disabled extension should not be picked up as unregistered"
+
     def test_resolve_pack_over_extension(self, project_dir, pack_dir, temp_dir, valid_pack_data):
         """Test that pack templates take priority over extension templates."""
         # Create extension with templates
@@ -741,10 +969,15 @@ class TestPresetResolver:
         ext_template = ext_templates_dir / "unique-template.md"
         ext_template.write_text("# Unique\n")
 
+        # Register extension in registry
+        extensions_dir = project_dir / ".specify" / "extensions"
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("my-ext", {"version": "1.0.0", "priority": 10})
+
         resolver = PresetResolver(project_dir)
         result = resolver.resolve_with_source("unique-template")
         assert result is not None
-        assert result["source"] == "extension:my-ext"
+        assert result["source"] == "extension:my-ext v1.0.0"
 
     def test_resolve_with_source_not_found(self, project_dir):
         """Test resolve_with_source for nonexistent template."""
@@ -765,6 +998,104 @@ class TestPresetResolver:
         assert result is None
 
 
+class TestExtensionPriorityResolution:
+    """Test extension priority resolution with registered and unregistered extensions."""
+
+    def test_unregistered_beats_registered_with_lower_precedence(self, project_dir):
+        """Unregistered extension (implicit priority 10) beats registered with priority 20."""
+        extensions_dir = project_dir / ".specify" / "extensions"
+        extensions_dir.mkdir(parents=True, exist_ok=True)
+
+        # Create registered extension with priority 20 (lower precedence than 10)
+        registered_dir = extensions_dir / "registered-ext"
+        (registered_dir / "templates").mkdir(parents=True)
+        (registered_dir / "templates" / "test-template.md").write_text("# From Registered\n")
+
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("registered-ext", {"version": "1.0.0", "priority": 20})
+
+        # Create unregistered extension directory (implicit priority 10)
+        unregistered_dir = extensions_dir / "unregistered-ext"
+        (unregistered_dir / "templates").mkdir(parents=True)
+        (unregistered_dir / "templates" / "test-template.md").write_text("# From Unregistered\n")
+
+        # Unregistered (priority 10) should beat registered (priority 20)
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve("test-template")
+        assert result is not None
+        assert "From Unregistered" in result.read_text()
+
+    def test_registered_with_higher_precedence_beats_unregistered(self, project_dir):
+        """Registered extension with priority 5 beats unregistered (implicit priority 10)."""
+        extensions_dir = project_dir / ".specify" / "extensions"
+        extensions_dir.mkdir(parents=True, exist_ok=True)
+
+        # Create registered extension with priority 5 (higher precedence than 10)
+        registered_dir = extensions_dir / "registered-ext"
+        (registered_dir / "templates").mkdir(parents=True)
+        (registered_dir / "templates" / "test-template.md").write_text("# From Registered\n")
+
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("registered-ext", {"version": "1.0.0", "priority": 5})
+
+        # Create unregistered extension directory (implicit priority 10)
+        unregistered_dir = extensions_dir / "unregistered-ext"
+        (unregistered_dir / "templates").mkdir(parents=True)
+        (unregistered_dir / "templates" / "test-template.md").write_text("# From Unregistered\n")
+
+        # Registered (priority 5) should beat unregistered (priority 10)
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve("test-template")
+        assert result is not None
+        assert "From Registered" in result.read_text()
+
+    def test_unregistered_attribution_with_priority_ordering(self, project_dir):
+        """Test resolve_with_source correctly attributes unregistered extension."""
+        extensions_dir = project_dir / ".specify" / "extensions"
+        extensions_dir.mkdir(parents=True, exist_ok=True)
+
+        # Create registered extension with priority 20
+        registered_dir = extensions_dir / "registered-ext"
+        (registered_dir / "templates").mkdir(parents=True)
+        (registered_dir / "templates" / "test-template.md").write_text("# From Registered\n")
+
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("registered-ext", {"version": "1.0.0", "priority": 20})
+
+        # Create unregistered extension (implicit priority 10)
+        unregistered_dir = extensions_dir / "unregistered-ext"
+        (unregistered_dir / "templates").mkdir(parents=True)
+        (unregistered_dir / "templates" / "test-template.md").write_text("# From Unregistered\n")
+
+        # Attribution should show unregistered extension
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve_with_source("test-template")
+        assert result is not None
+        assert "unregistered-ext" in result["source"]
+        assert "(unregistered)" in result["source"]
+
+    def test_same_priority_sorted_alphabetically(self, project_dir):
+        """Extensions with same priority are sorted alphabetically by ID."""
+        extensions_dir = project_dir / ".specify" / "extensions"
+        extensions_dir.mkdir(parents=True, exist_ok=True)
+
+        # Create two unregistered extensions (both implicit priority 10)
+        # "aaa-ext" should come before "zzz-ext" alphabetically
+        zzz_dir = extensions_dir / "zzz-ext"
+        (zzz_dir / "templates").mkdir(parents=True)
+        (zzz_dir / "templates" / "test-template.md").write_text("# From ZZZ\n")
+
+        aaa_dir = extensions_dir / "aaa-ext"
+        (aaa_dir / "templates").mkdir(parents=True)
+        (aaa_dir / "templates" / "test-template.md").write_text("# From AAA\n")
+
+        # AAA should win due to alphabetical ordering at same priority
+        resolver = PresetResolver(project_dir)
+        result = resolver.resolve("test-template")
+        assert result is not None
+        assert "From AAA" in result.read_text()
+
+
 # ===== PresetCatalog Tests =====
 
 
@@ -979,8 +1310,13 @@ class TestIntegration:
         ext_templates_dir.mkdir(parents=True)
         (ext_templates_dir / "spec-template.md").write_text("# Extension\n")
 
+        # Register extension in registry
+        extensions_dir = project_dir / ".specify" / "extensions"
+        ext_registry = ExtensionRegistry(extensions_dir)
+        ext_registry.add("my-ext", {"version": "1.0.0", "priority": 10})
+
         result = resolver.resolve_with_source("spec-template")
-        assert result["source"] == "extension:my-ext"
+        assert result["source"] == "extension:my-ext v1.0.0"
 
         # Install pack — should win over extension
         manager = PresetManager(project_dir)
@@ -1710,3 +2046,348 @@ class TestPresetSkills:
 
         metadata = manager.registry.get("self-test")
         assert metadata.get("registered_skills", []) == []
+
+
+class TestPresetSetPriority:
+    """Test preset set-priority CLI command."""
+
+    def test_set_priority_changes_priority(self, project_dir, pack_dir):
+        """Test set-priority command changes preset priority."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset with default priority
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        # Verify default priority
+        assert manager.registry.get("test-pack")["priority"] == 10
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "set-priority", "test-pack", "5"])
+
+        assert result.exit_code == 0, result.output
+        assert "priority changed: 10 → 5" in result.output
+
+        # Reload registry to see updated value
+        manager2 = PresetManager(project_dir)
+        assert manager2.registry.get("test-pack")["priority"] == 5
+
+    def test_set_priority_same_value_no_change(self, project_dir, pack_dir):
+        """Test set-priority with same value shows already set message."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset with priority 5
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5", priority=5)
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "set-priority", "test-pack", "5"])
+
+        assert result.exit_code == 0, result.output
+        assert "already has priority 5" in result.output
+
+    def test_set_priority_invalid_value(self, project_dir, pack_dir):
+        """Test set-priority rejects invalid priority values."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "set-priority", "test-pack", "0"])
+
+        assert result.exit_code == 1, result.output
+        assert "Priority must be a positive integer" in result.output
+
+    def test_set_priority_not_installed(self, project_dir):
+        """Test set-priority fails for non-installed preset."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "set-priority", "nonexistent", "5"])
+
+        assert result.exit_code == 1, result.output
+        assert "not installed" in result.output.lower()
+
+
+class TestPresetPriorityBackwardsCompatibility:
+    """Test backwards compatibility for presets installed before priority feature."""
+
+    def test_legacy_preset_without_priority_field(self, temp_dir):
+        """Presets installed before priority feature should default to 10."""
+        presets_dir = temp_dir / ".specify" / "presets"
+        presets_dir.mkdir(parents=True)
+
+        # Simulate legacy registry entry without priority field
+        registry = PresetRegistry(presets_dir)
+        registry.data["presets"]["legacy-pack"] = {
+            "version": "1.0.0",
+            "source": "local",
+            "enabled": True,
+            "installed_at": "2025-01-01T00:00:00Z",
+            # No "priority" field - simulates pre-feature preset
+        }
+        registry._save()
+
+        # Reload registry
+        registry2 = PresetRegistry(presets_dir)
+
+        # list_by_priority should use default of 10
+        result = registry2.list_by_priority()
+        assert len(result) == 1
+        assert result[0][0] == "legacy-pack"
+        # Priority defaults to 10 and is normalized in returned metadata
+        assert result[0][1]["priority"] == 10
+
+    def test_legacy_preset_in_list_installed(self, project_dir, pack_dir):
+        """list_installed returns priority=10 for legacy presets without priority field."""
+        manager = PresetManager(project_dir)
+
+        # Install preset normally
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        # Manually remove priority to simulate legacy preset
+        pack_data = manager.registry.data["presets"]["test-pack"]
+        del pack_data["priority"]
+        manager.registry._save()
+
+        # list_installed should still return priority=10
+        installed = manager.list_installed()
+        assert len(installed) == 1
+        assert installed[0]["priority"] == 10
+
+    def test_mixed_legacy_and_new_presets_ordering(self, temp_dir):
+        """Legacy presets (no priority) sort with default=10 among prioritized presets."""
+        presets_dir = temp_dir / ".specify" / "presets"
+        presets_dir.mkdir(parents=True)
+
+        registry = PresetRegistry(presets_dir)
+
+        # Add preset with explicit priority=5
+        registry.add("pack-with-priority", {"version": "1.0.0", "priority": 5})
+
+        # Add legacy preset without priority (manually)
+        registry.data["presets"]["legacy-pack"] = {
+            "version": "1.0.0",
+            "source": "local",
+            "enabled": True,
+            # No priority field
+        }
+
+        # Add another preset with priority=15
+        registry.add("low-priority-pack", {"version": "1.0.0", "priority": 15})
+        registry._save()
+
+        # Reload and check ordering
+        registry2 = PresetRegistry(presets_dir)
+        sorted_presets = registry2.list_by_priority()
+
+        # Should be: pack-with-priority (5), legacy-pack (default 10), low-priority-pack (15)
+        assert [p[0] for p in sorted_presets] == [
+            "pack-with-priority",
+            "legacy-pack",
+            "low-priority-pack",
+        ]
+
+
+class TestPresetEnableDisable:
+    """Test preset enable/disable CLI commands."""
+
+    def test_disable_preset(self, project_dir, pack_dir):
+        """Test disable command sets enabled=False."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        # Verify initially enabled
+        assert manager.registry.get("test-pack").get("enabled", True) is True
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "disable", "test-pack"])
+
+        assert result.exit_code == 0, result.output
+        assert "disabled" in result.output.lower()
+
+        # Reload registry to see updated value
+        manager2 = PresetManager(project_dir)
+        assert manager2.registry.get("test-pack")["enabled"] is False
+
+    def test_enable_preset(self, project_dir, pack_dir):
+        """Test enable command sets enabled=True."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset and disable it
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+        manager.registry.update("test-pack", {"enabled": False})
+
+        # Verify disabled
+        assert manager.registry.get("test-pack")["enabled"] is False
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "enable", "test-pack"])
+
+        assert result.exit_code == 0, result.output
+        assert "enabled" in result.output.lower()
+
+        # Reload registry to see updated value
+        manager2 = PresetManager(project_dir)
+        assert manager2.registry.get("test-pack")["enabled"] is True
+
+    def test_disable_already_disabled(self, project_dir, pack_dir):
+        """Test disable on already disabled preset shows warning."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset and disable it
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+        manager.registry.update("test-pack", {"enabled": False})
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "disable", "test-pack"])
+
+        assert result.exit_code == 0, result.output
+        assert "already disabled" in result.output.lower()
+
+    def test_enable_already_enabled(self, project_dir, pack_dir):
+        """Test enable on already enabled preset shows warning."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset (enabled by default)
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "enable", "test-pack"])
+
+        assert result.exit_code == 0, result.output
+        assert "already enabled" in result.output.lower()
+
+    def test_disable_not_installed(self, project_dir):
+        """Test disable fails for non-installed preset."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "disable", "nonexistent"])
+
+        assert result.exit_code == 1, result.output
+        assert "not installed" in result.output.lower()
+
+    def test_enable_not_installed(self, project_dir):
+        """Test enable fails for non-installed preset."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "enable", "nonexistent"])
+
+        assert result.exit_code == 1, result.output
+        assert "not installed" in result.output.lower()
+
+    def test_disabled_preset_excluded_from_resolution(self, project_dir, pack_dir):
+        """Test that disabled presets are excluded from template resolution."""
+        # Install preset with a template
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+
+        # Create a template in the preset directory
+        preset_template = project_dir / ".specify" / "presets" / "test-pack" / "templates" / "test-template.md"
+        preset_template.parent.mkdir(parents=True, exist_ok=True)
+        preset_template.write_text("# Template from test-pack")
+
+        resolver = PresetResolver(project_dir)
+
+        # Template should be found when enabled
+        result = resolver.resolve("test-template", "template")
+        assert result is not None
+        assert "test-pack" in str(result)
+
+        # Disable the preset
+        manager.registry.update("test-pack", {"enabled": False})
+
+        # Template should NOT be found when disabled
+        resolver2 = PresetResolver(project_dir)
+        result2 = resolver2.resolve("test-template", "template")
+        assert result2 is None
+
+    def test_enable_corrupted_registry_entry(self, project_dir, pack_dir):
+        """Test enable fails gracefully for corrupted registry entry."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset then corrupt the registry entry
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+        manager.registry.data["presets"]["test-pack"] = "corrupted-string"
+        manager.registry._save()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "enable", "test-pack"])
+
+        assert result.exit_code == 1
+        assert "corrupted state" in result.output.lower()
+
+    def test_disable_corrupted_registry_entry(self, project_dir, pack_dir):
+        """Test disable fails gracefully for corrupted registry entry."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Install preset then corrupt the registry entry
+        manager = PresetManager(project_dir)
+        manager.install_from_directory(pack_dir, "0.1.5")
+        manager.registry.data["presets"]["test-pack"] = "corrupted-string"
+        manager.registry._save()
+
+        with patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(app, ["preset", "disable", "test-pack"])
+
+        assert result.exit_code == 1
+        assert "corrupted state" in result.output.lower()