Potential fix for pull request finding

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
chore: bump version to 0.3.0
2026-03-17 02:43:08 +00:00 · 2026-03-13 15:14:46 -05:00 · 2026-03-13 20:11:58 +00:00 · 2026-03-13 15:09:14 -05:00 · 2026-03-13 11:46:21 -05:00 · 2026-03-13 10:50:07 -05:00
49 changed files with 7211 additions and 888 deletions
--- a/.github/workflows/scripts/create-release-packages.ps1
+++ b/.github/workflows/scripts/create-release-packages.ps1
@@ -382,7 +382,7 @@ function Build-Variant {
        }
        'qwen' {
            $cmdDir = Join-Path $baseDir ".qwen/commands"
-            Generate-Commands -Agent 'qwen' -Extension 'toml' -ArgFormat '{{args}}' -OutputDir $cmdDir -ScriptVariant $Script
+            Generate-Commands -Agent 'qwen' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $cmdDir -ScriptVariant $Script
            if (Test-Path "agent_templates/qwen/QWEN.md") {
                Copy-Item -Path "agent_templates/qwen/QWEN.md" -Destination (Join-Path $baseDir "QWEN.md")
            }
@@ -442,7 +442,7 @@ function Build-Variant {
            if (Test-Path $tabnineTemplate) { Copy-Item $tabnineTemplate (Join-Path $baseDir 'TABNINE.md') }
        }
        'agy' {
-            $cmdDir = Join-Path $baseDir ".agent/workflows"
+            $cmdDir = Join-Path $baseDir ".agent/commands"
            Generate-Commands -Agent 'agy' -Extension 'md' -ArgFormat '$ARGUMENTS' -OutputDir $cmdDir -ScriptVariant $Script
        }
        'vibe' {
--- a/.github/workflows/scripts/create-release-packages.sh
+++ b/.github/workflows/scripts/create-release-packages.sh
@@ -240,7 +240,7 @@ build_variant() {
      generate_commands cursor-agent md "\$ARGUMENTS" "$base_dir/.cursor/commands" "$script" ;;
    qwen)
      mkdir -p "$base_dir/.qwen/commands"
-      generate_commands qwen toml "{{args}}" "$base_dir/.qwen/commands" "$script"
+      generate_commands qwen md "\$ARGUMENTS" "$base_dir/.qwen/commands" "$script"
      [[ -f agent_templates/qwen/QWEN.md ]] && cp agent_templates/qwen/QWEN.md "$base_dir/QWEN.md" ;;
    opencode)
      mkdir -p "$base_dir/.opencode/command"
@@ -280,8 +280,8 @@ build_variant() {
      mkdir -p "$base_dir/.kiro/prompts"
      generate_commands kiro-cli md "\$ARGUMENTS" "$base_dir/.kiro/prompts" "$script" ;;
    agy)
-      mkdir -p "$base_dir/.agent/workflows"
-      generate_commands agy md "\$ARGUMENTS" "$base_dir/.agent/workflows" "$script" ;;
+      mkdir -p "$base_dir/.agent/commands"
+      generate_commands agy md "\$ARGUMENTS" "$base_dir/.agent/commands" "$script" ;;
    bob)
      mkdir -p "$base_dir/.bob/commands"
      generate_commands bob md "\$ARGUMENTS" "$base_dir/.bob/commands" "$script" ;;
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -10,10 +10,6 @@ The toolkit supports multiple AI coding assistants, allowing teams to use their

 ---

-## General practices
-
- Any changes to `__init__.py` for the Specify CLI require a version rev in `pyproject.toml` and addition of entries to `CHANGELOG.md`.
-
 ## Adding New Agent Support

 This section explains how to add support for new AI agents/assistants to the Specify CLI. Use this guide as a reference when integrating new AI tools into the Spec-Driven Development workflow.
@@ -35,7 +31,7 @@ Specify supports multiple AI agents by generating agent-specific command files a
 | **Gemini CLI**             | `.gemini/commands/`    | TOML     | `gemini`        | Google's Gemini CLI         |
 | **GitHub Copilot**         | `.github/agents/`      | Markdown | N/A (IDE-based) | GitHub Copilot in VS Code   |
 | **Cursor**                 | `.cursor/commands/`    | Markdown | `cursor-agent`  | Cursor CLI                  |
-| **Qwen Code**              | `.qwen/commands/`      | TOML     | `qwen`          | Alibaba's Qwen Code 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                   |
 | **Windsurf**               | `.windsurf/workflows/` | Markdown | N/A (IDE-based) | Windsurf IDE workflows      |
@@ -88,7 +84,7 @@ 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, agy), `"prompts"` (codex, kiro-cli), `"command"` (opencode - singular)
+  - Some agents use alternative names: `"agents"` (copilot), `"workflows"` (windsurf, kilocode), `"prompts"` (codex, kiro-cli), `"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
@@ -339,7 +335,7 @@ Work within integrated development environments:

 ### Markdown Format

-Used by: Claude, Cursor, opencode, Windsurf, Kiro CLI, Amp, SHAI, IBM Bob, Kimi Code
+Used by: Claude, Cursor, opencode, Windsurf, Kiro CLI, Amp, SHAI, IBM Bob, Kimi Code, Qwen

 **Standard format:**

@@ -364,7 +360,7 @@ Command content with {SCRIPT} and $ARGUMENTS placeholders.

 ### TOML Format

-Used by: Gemini, Qwen, Tabnine
+Used by: Gemini, Tabnine

 ```toml
 description = "Command description"
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,51 @@ 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).

+## [0.3.0] - 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(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`
+- CLI commands: `specify preset search`, `specify preset add`, `specify preset list`, `specify preset remove`, `specify preset resolve`, `specify preset info`
+- CLI commands: `specify preset catalog list`, `specify preset catalog add`, `specify preset catalog remove` for multi-catalog management
+- `PresetCatalogEntry` dataclass and multi-catalog support mirroring the extension catalog system
+- `--preset` option for `specify init` to install presets during initialization
+- Priority-based preset resolution: presets with lower priority number win (`--priority` flag)
+- `resolve_template()` / `Resolve-Template` helpers in bash and PowerShell common scripts
+- Template resolution priority stack: overrides → presets → extensions → core
+- Preset catalog files (`presets/catalog.json`, `presets/catalog.community.json`)
+- Preset scaffold directory (`presets/scaffold/`)
+- Scripts updated to use template resolution instead of hardcoded paths
+- feat(presets): Preset command overrides now propagate to agent skills when `--ai-skills` was used during init
+- feat: `specify init` persists CLI options to `.specify/init-options.json` for downstream operations
+- feat(extensions): support `.extensionignore` to exclude files/folders during `specify extension add` (#1781)
+
 ## [0.2.1] - 2026-03-11

 ### Changed
@@ -51,13 +96,6 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - 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(extensions): support `.extensionignore` to exclude files/folders during `specify extension add` (#1781)
-
 ## [0.2.0] - 2026-03-09

 ### Changed
--- a/README.md
+++ b/README.md
@@ -154,7 +154,9 @@ See Spec-Driven Development in action across different scenarios with these comm

 - **[Greenfield Spring Boot + React platform](https://github.com/mnriem/spec-kit-spring-react-demo)** — Builds an LLM performance analytics platform (REST API, graphs, iteration tracking) from scratch using Spring Boot, embedded React, PostgreSQL, and Docker Compose, with a clarify step and a cross-artifact consistency analysis pass included.

- **[Brownfield ASP.NET CMS extension](https://github.com/mnriem/spec-kit-aspnet-brownfield-demo)** — Extends an existing open-source .NET CMS (CarrotCakeCMS-Core) with two new features — cross-platform Docker Compose infrastructure and a token-authenticated headless REST API — demonstrating how spec-kit fits into existing codebases without prior specs or a constitution.
+- **[Brownfield ASP.NET CMS extension](https://github.com/mnriem/spec-kit-aspnet-brownfield-demo)** — Extends an existing open-source .NET CMS (CarrotCakeCMS-Core, ~307,000 lines of C#, Razor, SQL, JavaScript, and config files) with two new features — cross-platform Docker Compose infrastructure and a token-authenticated headless REST API — demonstrating how spec-kit fits into existing codebases without prior specs or a constitution.
+
+- **[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.

 ## 🤖 Supported AI Agents

@@ -181,7 +183,7 @@ See Spec-Driven Development in action across different scenarios with these comm
 | [Mistral Vibe](https://github.com/mistralai/mistral-vibe)                            | ✅      |                                                                                                                                           |
 | [Kimi Code](https://code.kimi.com/)                                                  | ✅      |                                                                                                                                           |
 | [Windsurf](https://windsurf.com/)                                                    | ✅      |                                                                                                                                           |
-| [Antigravity (agy)](https://antigravity.google/)                                     | ✅      |                                                                                                                                           |
+| [Antigravity (agy)](https://antigravity.google/)                                     | ✅      | Requires `--ai-skills` |
 | Generic                                                                              | ✅      | Bring your own agent — use `--ai generic --ai-commands-dir <path>` for unsupported agents                                                 |

 ## 🔧 Specify CLI Reference
@@ -246,7 +248,7 @@ specify init my-project --ai vibe
 specify init my-project --ai bob

 # Initialize with Antigravity support
-specify init my-project --ai agy
+specify init my-project --ai agy --ai-skills

 # Initialize with an unsupported agent (generic / bring your own agent)
 specify init my-project --ai generic --ai-commands-dir .myagent/commands/
--- a/extensions/README.md
+++ b/extensions/README.md
@@ -76,6 +76,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | 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) |
 | 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) |
 | 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) |
+| 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) |
 | Ralph Loop | Autonomous implementation loop using AI agent CLI | [spec-kit-ralph](https://github.com/Rubiss/spec-kit-ralph) |
 | 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) |
--- a/extensions/RFC-EXTENSION-SYSTEM.md
+++ b/extensions/RFC-EXTENSION-SYSTEM.md
@@ -1,9 +1,9 @@
 # RFC: Spec Kit Extension System

-**Status**: Draft
+**Status**: Implemented
 **Author**: Stats Perform Engineering
 **Created**: 2026-01-28
-**Updated**: 2026-01-28
+**Updated**: 2026-03-11

 ---

@@ -24,8 +24,9 @@
 13. [Security Considerations](#security-considerations)
 14. [Migration Strategy](#migration-strategy)
 15. [Implementation Phases](#implementation-phases)
-16. [Open Questions](#open-questions)
-17. [Appendices](#appendices)
+16. [Resolved Questions](#resolved-questions)
+17. [Open Questions (Remaining)](#open-questions-remaining)
+18. [Appendices](#appendices)

 ---

@@ -1504,203 +1505,225 @@ AI agent registers both names, so old scripts work.

 ## Implementation Phases

-### Phase 1: Core Extension System (Week 1-2)
+### Phase 1: Core Extension System ✅ COMPLETED

 **Goal**: Basic extension infrastructure

 **Deliverables**:

- [ ] Extension manifest schema (`extension.yml`)
- [ ] Extension directory structure
- [ ] CLI commands:
-  - [ ] `specify extension list`
-  - [ ] `specify extension add` (from URL)
-  - [ ] `specify extension remove`
- [ ] Extension registry (`.specify/extensions/.registry`)
- [ ] Command registration (Claude only initially)
- [ ] Basic validation (manifest schema, compatibility)
- [ ] Documentation (extension development guide)
+- [x] Extension manifest schema (`extension.yml`)
+- [x] Extension directory structure
+- [x] CLI commands:
+  - [x] `specify extension list`
+  - [x] `specify extension add` (from URL and local `--dev`)
+  - [x] `specify extension remove`
+- [x] Extension registry (`.specify/extensions/.registry`)
+- [x] Command registration (Claude and 15+ other agents)
+- [x] Basic validation (manifest schema, compatibility)
+- [x] Documentation (extension development guide)

 **Testing**:

- [ ] Unit tests for manifest parsing
- [ ] Integration test: Install dummy extension
- [ ] Integration test: Register commands with Claude
+- [x] Unit tests for manifest parsing
+- [x] Integration test: Install dummy extension
+- [x] Integration test: Register commands with Claude

-### Phase 2: Jira Extension (Week 3)
+### Phase 2: Jira Extension ✅ COMPLETED

 **Goal**: First production extension

 **Deliverables**:

- [ ] Create `spec-kit-jira` repository
- [ ] Port Jira functionality to extension
- [ ] Create `jira-config.yml` template
- [ ] Commands:
-  - [ ] `specstoissues.md`
-  - [ ] `discover-fields.md`
-  - [ ] `sync-status.md`
- [ ] Helper scripts
- [ ] Documentation (README, configuration guide, examples)
- [ ] Release v1.0.0
+- [x] Create `spec-kit-jira` repository
+- [x] Port Jira functionality to extension
+- [x] Create `jira-config.yml` template
+- [x] Commands:
+  - [x] `specstoissues.md`
+  - [x] `discover-fields.md`
+  - [x] `sync-status.md`
+- [x] Helper scripts
+- [x] Documentation (README, configuration guide, examples)
+- [x] Release v3.0.0

 **Testing**:

- [ ] Test on `eng-msa-ts` project
- [ ] Verify spec→Epic, phase→Story, task→Issue mapping
- [ ] Test configuration loading and validation
- [ ] Test custom field application
+- [x] Test on `eng-msa-ts` project
+- [x] Verify spec→Epic, phase→Story, task→Issue mapping
+- [x] Test configuration loading and validation
+- [x] Test custom field application

-### Phase 3: Extension Catalog (Week 4)
+### Phase 3: Extension Catalog ✅ COMPLETED

 **Goal**: Discovery and distribution

 **Deliverables**:

- [ ] Central catalog (`extensions/catalog.json` in spec-kit repo)
- [ ] Catalog fetch and parsing
- [ ] CLI commands:
-  - [ ] `specify extension search`
-  - [ ] `specify extension info`
- [ ] Catalog publishing process (GitHub Action)
- [ ] Documentation (how to publish extensions)
+- [x] Central catalog (`extensions/catalog.json` in spec-kit repo)
+- [x] Community catalog (`extensions/catalog.community.json`)
+- [x] Catalog fetch and parsing with multi-catalog support
+- [x] CLI commands:
+  - [x] `specify extension search`
+  - [x] `specify extension info`
+  - [x] `specify extension catalog list`
+  - [x] `specify extension catalog add`
+  - [x] `specify extension catalog remove`
+- [x] Documentation (how to publish extensions)

 **Testing**:

- [ ] Test catalog fetch
- [ ] Test extension search/filtering
- [ ] Test catalog caching
+- [x] Test catalog fetch
+- [x] Test extension search/filtering
+- [x] Test catalog caching
+- [x] Test multi-catalog merge with priority

-### Phase 4: Advanced Features (Week 5-6)
+### Phase 4: Advanced Features ✅ COMPLETED

 **Goal**: Hooks, updates, multi-agent support

 **Deliverables**:

- [ ] Hook system (`hooks` in extension.yml)
- [ ] Hook registration and execution
- [ ] Project extensions config (`.specify/extensions.yml`)
- [ ] CLI commands:
-  - [ ] `specify extension update`
-  - [ ] `specify extension enable/disable`
- [ ] Command registration for multiple agents (Gemini, Copilot)
- [ ] Extension update notifications
- [ ] Configuration layer resolution (project, local, env)
+- [x] Hook system (`hooks` in extension.yml)
+- [x] Hook registration and execution
+- [x] Project extensions config (`.specify/extensions.yml`)
+- [x] CLI commands:
+  - [x] `specify extension update` (with atomic backup/restore)
+  - [x] `specify extension enable/disable`
+- [x] Command registration for multiple agents (15+ agents including Claude, Copilot, Gemini, Cursor, etc.)
+- [x] Extension update notifications (version comparison)
+- [x] Configuration layer resolution (project, local, env)
+
+**Additional features implemented beyond original RFC**:
+
+- [x] **Display name resolution**: All commands accept extension display names in addition to IDs
+- [x] **Ambiguous name handling**: User-friendly tables when multiple extensions match a name
+- [x] **Atomic update with rollback**: Full backup of extension dir, commands, hooks, and registry with automatic rollback on failure
+- [x] **Pre-install ID validation**: Validates extension ID from ZIP before installing (security)
+- [x] **Enabled state preservation**: Disabled extensions stay disabled after update
+- [x] **Registry update/restore methods**: Clean API for enable/disable and rollback operations
+- [x] **Catalog error fallback**: `extension info` falls back to local info when catalog unavailable
+- [x] **`_install_allowed` flag**: Discovery-only catalogs can't be used for installation
+- [x] **Cache invalidation**: Cache invalidated when `SPECKIT_CATALOG_URL` changes

 **Testing**:

- [ ] Test hooks in core commands
- [ ] Test extension updates (preserve config)
- [ ] Test multi-agent registration
+- [x] Test hooks in core commands
+- [x] Test extension updates (preserve config)
+- [x] Test multi-agent registration
+- [x] Test atomic rollback on update failure
+- [x] Test enabled state preservation
+- [x] Test display name resolution

-### Phase 5: Polish & Documentation (Week 7)
+### Phase 5: Polish & Documentation ✅ COMPLETED

 **Goal**: Production ready

 **Deliverables**:

- [ ] Comprehensive documentation:
-  - [ ] User guide (installing/using extensions)
-  - [ ] Extension development guide
-  - [ ] Extension API reference
-  - [ ] Migration guide (core → extension)
- [ ] Error messages and validation improvements
- [ ] CLI help text updates
- [ ] Example extension template (cookiecutter)
- [ ] Blog post / announcement
- [ ] Video tutorial
+- [x] Comprehensive documentation:
+  - [x] User guide (EXTENSION-USER-GUIDE.md)
+  - [x] Extension development guide (EXTENSION-DEV-GUIDE.md)
+  - [x] Extension API reference (EXTENSION-API-REFERENCE.md)
+- [x] Error messages and validation improvements
+- [x] CLI help text updates

 **Testing**:

- [ ] End-to-end testing on multiple projects
- [ ] Community beta testing
- [ ] Performance testing (large projects)
+- [x] End-to-end testing on multiple projects
+- [x] 163 unit tests passing

 ---

-## Open Questions
+## Resolved Questions

-### 1. Extension Namespace
+The following questions from the original RFC have been resolved during implementation:
+
+### 1. Extension Namespace ✅ RESOLVED

 **Question**: Should extension commands use namespace prefix?

-**Options**:
+**Decision**: **Option C** - Both prefixed and aliases are supported. Commands use `speckit.{extension}.{command}` as canonical name, with optional aliases defined in manifest.

- A) Prefixed: `/speckit.jira.specstoissues` (explicit, avoids conflicts)
- B) Short alias: `/jira.specstoissues` (shorter, less verbose)
- C) Both: Register both names, prefer prefixed in docs
-
-**Recommendation**: C (both), prefixed is canonical
+**Implementation**: The `aliases` field in `extension.yml` allows extensions to register additional command names.

 ---

-### 2. Config File Location
+### 2. Config File Location ✅ RESOLVED

 **Question**: Where should extension configs live?

-**Options**:
+**Decision**: **Option A** - Extension directory (`.specify/extensions/{ext-id}/{ext-id}-config.yml`). This keeps extensions self-contained and easier to manage.

- A) Extension directory: `.specify/extensions/jira/jira-config.yml` (encapsulated)
- B) Root level: `.specify/jira-config.yml` (more visible)
- C) Unified: `.specify/extensions.yml` (all extension configs in one file)
-
-**Recommendation**: A (extension directory), cleaner separation
+**Implementation**: Each extension has its own config file within its directory, with layered resolution (defaults → project → local → env vars).

 ---

-### 3. Command File Format
+### 3. Command File Format ✅ RESOLVED

 **Question**: Should extensions use universal format or agent-specific?

-**Options**:
+**Decision**: **Option A** - Universal Markdown format. Extensions write commands once, CLI converts to agent-specific format during registration.

- A) Universal Markdown: Extensions write once, CLI converts per-agent
- B) Agent-specific: Extensions provide separate files for each agent
- C) Hybrid: Universal default, agent-specific overrides
-
-**Recommendation**: A (universal), reduces duplication
+**Implementation**: `CommandRegistrar` class handles conversion to 15+ agent formats (Claude, Copilot, Gemini, Cursor, etc.).

 ---

-### 4. Hook Execution Model
+### 4. Hook Execution Model ✅ RESOLVED

 **Question**: How should hooks execute?

-**Options**:
+**Decision**: **Option A** - Hooks are registered in `.specify/extensions.yml` and executed by the AI agent when it sees the hook trigger. Hook state (enabled/disabled) is managed per-extension.

- A) AI agent interprets: Core commands output `EXECUTE_COMMAND: name`
- B) CLI executes: Core commands call `specify extension hook after_tasks`
- C) Agent built-in: Extension system built into AI agent (Claude SDK)
-
-**Recommendation**: A initially (simpler), move to C long-term
+**Implementation**: `HookExecutor` class manages hook registration and state in `extensions.yml`.

 ---

-### 5. Extension Distribution
+### 5. Extension Distribution ✅ RESOLVED

 **Question**: How should extensions be packaged?

-**Options**:
+**Decision**: **Option A** - ZIP archives downloaded from GitHub releases (via catalog `download_url`). Local development uses `--dev` flag with directory path.

- A) ZIP archives: Downloaded from GitHub releases
- B) Git repos: Cloned directly (`git clone`)
- C) Python packages: Installable via `uv tool install`
-
-**Recommendation**: A (ZIP), simpler for non-Python extensions in future
+**Implementation**: `ExtensionManager.install_from_zip()` handles ZIP extraction and validation.

 ---

-### 6. Multi-Version Support
+### 6. Multi-Version Support ✅ RESOLVED

 **Question**: Can multiple versions of same extension coexist?

+**Decision**: **Option A** - Single version only. Updates replace the existing version with atomic rollback on failure.
+
+**Implementation**: `extension update` performs atomic backup/restore to ensure safe updates.
+
+---
+
+## Open Questions (Remaining)
+
+### 1. Sandboxing / Permissions (Future)
+
+**Question**: Should extensions declare required permissions?
+
 **Options**:

- A) Single version: Only one version installed at a time
- B) Multi-version: Side-by-side versions (`.specify/extensions/jira@1.0/`, `.specify/extensions/jira@2.0/`)
- C) Per-branch: Different branches use different versions
+- A) No sandboxing (current): Extensions run with same privileges as AI agent
+- B) Permission declarations: Extensions declare `filesystem:read`, `network:external`, etc.
+- C) Opt-in sandboxing: Organizations can enable permission enforcement

-**Recommendation**: A initially (simpler), consider B in future if needed
+**Status**: Deferred to future version. Currently using trust-based model where users trust extension authors.
+
+---
+
+### 2. Package Signatures (Future)
+
+**Question**: Should extensions be cryptographically signed?
+
+**Options**:
+
+- A) No signatures (current): Trust based on catalog source
+- B) GPG/Sigstore signatures: Verify package integrity
+- C) Catalog-level verification: Catalog maintainers verify packages
+
+**Status**: Deferred to future version. `checksum` field is available in catalog schema but not enforced.

 ---

--- a/extensions/catalog.community.json
+++ b/extensions/catalog.community.json
@@ -1,6 +1,6 @@
 {
  "schema_version": "1.0",
-  "updated_at": "2026-03-09T00:00:00Z",
+  "updated_at": "2026-03-13T12:00:00Z",
  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
  "extensions": {
    "azure-devops": {
@@ -74,6 +74,37 @@
      "created_at": "2026-02-22T00:00:00Z",
      "updated_at": "2026-02-22T00:00:00Z"
    },
+    "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",
--- a/extensions/catalog.json
+++ b/extensions/catalog.json
@@ -1,6 +1,21 @@
 {
  "schema_version": "1.0",
-  "updated_at": "2026-02-03T00:00:00Z",
+  "updated_at": "2026-03-10T00:00:00Z",
  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.json",
-  "extensions": {}
-}
+  "extensions": {
+    "selftest": {
+      "name": "Spec Kit Self-Test Utility",
+      "id": "selftest",
+      "version": "1.0.0",
+      "description": "Verifies catalog extensions by programmatically walking through the discovery, installation, and registration lifecycle.",
+      "author": "spec-kit-core",
+      "repository": "https://github.com/github/spec-kit",
+      "download_url": "https://github.com/github/spec-kit/releases/download/selftest-v1.0.0/selftest.zip",
+      "tags": [
+        "testing",
+        "core",
+        "utility"
+      ]
+    }
+  }
+}
--- a/extensions/selftest/commands/selftest.md
+++ b/extensions/selftest/commands/selftest.md
@@ -0,0 +1,69 @@
+---
+description: "Validate the lifecycle of an extension from the catalog."
+---
+
+# Extension Self-Test: `$ARGUMENTS`
+
+This command drives a self-test simulating the developer experience with the `$ARGUMENTS` extension.
+
+## Goal
+
+Validate the end-to-end lifecycle (discovery, installation, registration) for the extension: `$ARGUMENTS`.
+If `$ARGUMENTS` is empty, you must tell the user to provide an extension name, for example: `/speckit.selftest.extension linear`.
+
+## Steps
+
+### Step 1: Catalog Discovery Validation
+
+Check if the extension exists in the Spec Kit catalog.
+Execute this command and verify that it completes successfully and that the returned extension ID exactly matches `$ARGUMENTS`. If the command fails or the ID does not match `$ARGUMENTS`, fail the test.
+
+```bash
+specify extension info "$ARGUMENTS"
+```
+
+### Step 2: Simulate Installation
+
+First, try to add the extension to the current workspace configuration directly. If the catalog provides the extension as `install_allowed: false` (discovery-only), this step is *expected* to fail.
+
+```bash
+specify extension add "$ARGUMENTS"
+```
+
+Then, simulate adding the extension by installing it from its catalog download URL, which should bypass the restriction.
+Obtain the extension's `download_url` from the catalog metadata (for example, via a catalog info command or UI), then run:
+
+```bash
+specify extension add "$ARGUMENTS" --from "<download_url>"
+```
+
+### Step 3: Registration Verification
+
+Once the `add` command completes, verify the installation by checking the project configuration.
+Use terminal tools (like `cat`) to verify that the following file contains a record for `$ARGUMENTS`.
+
+```bash
+cat .specify/extensions/.registry/$ARGUMENTS.json
+```
+
+### Step 4: Verification Report
+
+Analyze the standard output of the three steps. 
+Generate a terminal-style test output format detailing the results of discovery, installation, and registration. Return this directly to the user.
+
+Example output format:
+```text
+============================= test session starts ==============================
+collected 3 items
+
+test_selftest_discovery.py::test_catalog_search [PASS/FAIL]
+  Details: [Provide execution result of specify extension search]
+
+test_selftest_installation.py::test_extension_add [PASS/FAIL]
+  Details: [Provide execution result of specify extension add]
+
+test_selftest_registration.py::test_config_verification [PASS/FAIL]
+  Details: [Provide execution result of registry record verification]
+
+============================== [X] passed in ... ==============================
+```
--- a/extensions/selftest/extension.yml
+++ b/extensions/selftest/extension.yml
@@ -0,0 +1,16 @@
+schema_version: "1.0"
+extension:
+  id: selftest
+  name: Spec Kit Self-Test Utility
+  version: 1.0.0
+  description: Verifies catalog extensions by programmatically walking through the discovery, installation, and registration lifecycle.
+  author: spec-kit-core
+  repository: https://github.com/github/spec-kit
+  license: MIT
+requires:
+  speckit_version: ">=0.2.0"
+provides:
+  commands:
+    - name: speckit.selftest.extension
+      file: commands/selftest.md
+      description: Validate the lifecycle of an extension from the catalog.
--- a/presets/ARCHITECTURE.md
+++ b/presets/ARCHITECTURE.md
@@ -0,0 +1,157 @@
+# Preset System Architecture
+
+This document describes the internal architecture of the preset system — how template resolution, command registration, and catalog management work under the hood.
+
+For usage instructions, see [README.md](README.md).
+
+## Template Resolution
+
+When Spec Kit needs a template (e.g. `spec-template`), the `PresetResolver` walks a priority stack and returns the first match:
+
+```mermaid
+flowchart TD
+    A["resolve_template('spec-template')"] --> B{Override exists?}
+    B -- Yes --> C[".specify/templates/overrides/spec-template.md"]
+    B -- No --> D{Preset provides it?}
+    D -- Yes --> E[".specify/presets/‹preset-id›/templates/spec-template.md"]
+    D -- No --> F{Extension provides it?}
+    F -- Yes --> G[".specify/extensions/‹ext-id›/templates/spec-template.md"]
+    F -- No --> H[".specify/templates/spec-template.md"]
+
+    E -- "multiple presets?" --> I["lowest priority number wins"]
+    I --> E
+
+    style C fill:#4caf50,color:#fff
+    style E fill:#2196f3,color:#fff
+    style G fill:#ff9800,color:#fff
+    style H fill:#9e9e9e,color:#fff
+```
+
+| Priority | Source | Path | Use case |
+|----------|--------|------|----------|
+| 1 (highest) | Override | `.specify/templates/overrides/` | One-off project-local tweaks |
+| 2 | Preset | `.specify/presets/<id>/templates/` | Shareable, stackable customizations |
+| 3 | Extension | `.specify/extensions/<id>/templates/` | Extension-provided templates |
+| 4 (lowest) | Core | `.specify/templates/` | Shipped defaults |
+
+When multiple presets are installed, they're sorted by their `priority` field (lower number = higher precedence). This is set via `--priority` on `specify preset add`.
+
+The resolution is implemented three times to ensure consistency:
+- **Python**: `PresetResolver` in `src/specify_cli/presets.py`
+- **Bash**: `resolve_template()` in `scripts/bash/common.sh`
+- **PowerShell**: `Resolve-Template` in `scripts/powershell/common.ps1`
+
+## Command Registration
+
+When a preset is installed with `type: "command"` entries, the `PresetManager` registers them into all detected agent directories using the shared `CommandRegistrar` from `src/specify_cli/agents.py`.
+
+```mermaid
+flowchart TD
+    A["specify preset add my-preset"] --> B{Preset has type: command?}
+    B -- No --> Z["done (templates only)"]
+    B -- Yes --> C{Extension command?}
+    C -- "speckit.myext.cmd\n(3+ dot segments)" --> D{Extension installed?}
+    D -- No --> E["skip (extension not active)"]
+    D -- Yes --> F["register command"]
+    C -- "speckit.specify\n(core command)" --> F
+    F --> G["detect agent directories"]
+    G --> H[".claude/commands/"]
+    G --> I[".gemini/commands/"]
+    G --> J[".github/agents/"]
+    G --> K["... (17+ agents)"]
+    H --> L["write .md (Markdown format)"]
+    I --> M["write .toml (TOML format)"]
+    J --> N["write .agent.md + .prompt.md"]
+
+    style E fill:#ff5722,color:#fff
+    style L fill:#4caf50,color:#fff
+    style M fill:#4caf50,color:#fff
+    style N fill:#4caf50,color:#fff
+```
+
+### Extension safety check
+
+Command names follow the pattern `speckit.<ext-id>.<cmd-name>`. When a command has 3+ dot segments, the system extracts the extension ID and checks if `.specify/extensions/<ext-id>/` exists. If the extension isn't installed, the command is skipped — preventing orphan files referencing non-existent extensions.
+
+Core commands (e.g. `speckit.specify`, with only 2 segments) are always registered.
+
+### Agent format rendering
+
+The `CommandRegistrar` renders commands differently per agent:
+
+| Agent | Format | Extension | Arg placeholder |
+|-------|--------|-----------|-----------------|
+| Claude, Cursor, opencode, Windsurf, etc. | Markdown | `.md` | `$ARGUMENTS` |
+| Copilot | Markdown | `.agent.md` + `.prompt.md` | `$ARGUMENTS` |
+| Gemini, Qwen, Tabnine | TOML | `.toml` | `{{args}}` |
+
+### Cleanup on removal
+
+When `specify preset remove` is called, the registered commands are read from the registry metadata and the corresponding files are deleted from each agent directory, including Copilot companion `.prompt.md` files.
+
+## Catalog System
+
+```mermaid
+flowchart TD
+    A["specify preset search"] --> B["PresetCatalog.get_active_catalogs()"]
+    B --> C{SPECKIT_PRESET_CATALOG_URL set?}
+    C -- Yes --> D["single custom catalog"]
+    C -- No --> E{.specify/preset-catalogs.yml exists?}
+    E -- Yes --> F["project-level catalog stack"]
+    E -- No --> G{"~/.specify/preset-catalogs.yml exists?"}
+    G -- Yes --> H["user-level catalog stack"]
+    G -- No --> I["built-in defaults"]
+    I --> J["default (install allowed)"]
+    I --> K["community (discovery only)"]
+
+    style D fill:#ff9800,color:#fff
+    style F fill:#2196f3,color:#fff
+    style H fill:#2196f3,color:#fff
+    style J fill:#4caf50,color:#fff
+    style K fill:#9e9e9e,color:#fff
+```
+
+Catalogs are fetched with a 1-hour cache (per-URL, SHA256-hashed cache files). Each catalog entry has a `priority` (for merge ordering) and `install_allowed` flag.
+
+## Repository Layout
+
+```
+presets/
+├── ARCHITECTURE.md                         # This file
+├── PUBLISHING.md                           # Guide for submitting presets to the catalog
+├── README.md                               # User guide
+├── catalog.json                            # Official preset catalog
+├── catalog.community.json                  # Community preset catalog
+├── scaffold/                               # Scaffold for creating new presets
+│   ├── preset.yml                          # Example manifest
+│   ├── README.md                           # Guide for customizing the scaffold
+│   ├── commands/
+│   │   ├── speckit.specify.md              # Core command override example
+│   │   └── speckit.myext.myextcmd.md       # Extension command override example
+│   └── templates/
+│       ├── spec-template.md                # Core template override example
+│       └── myext-template.md               # Extension template override example
+└── self-test/                              # Self-test preset (overrides all core templates)
+    ├── preset.yml
+    ├── commands/
+    │   └── speckit.specify.md
+    └── templates/
+        ├── spec-template.md
+        ├── plan-template.md
+        ├── tasks-template.md
+        ├── checklist-template.md
+        ├── constitution-template.md
+        └── agent-file-template.md
+```
+
+## Module Structure
+
+```
+src/specify_cli/
+├── agents.py       # CommandRegistrar — shared infrastructure for writing
+│                    #   command files to agent directories
+├── presets.py       # PresetManifest, PresetRegistry, PresetManager,
+│                    #   PresetCatalog, PresetCatalogEntry, PresetResolver
+└── __init__.py      # CLI commands: specify preset list/add/remove/search/
+                     #   resolve/info, specify preset catalog list/add/remove
+```
--- a/presets/PUBLISHING.md
+++ b/presets/PUBLISHING.md
@@ -0,0 +1,295 @@
+# Preset Publishing Guide
+
+This guide explains how to publish your preset to the Spec Kit preset catalog, making it discoverable by `specify preset search`.
+
+## Table of Contents
+
+1. [Prerequisites](#prerequisites)
+2. [Prepare Your Preset](#prepare-your-preset)
+3. [Submit to Catalog](#submit-to-catalog)
+4. [Verification Process](#verification-process)
+5. [Release Workflow](#release-workflow)
+6. [Best Practices](#best-practices)
+
+---
+
+## Prerequisites
+
+Before publishing a preset, ensure you have:
+
+1. **Valid Preset**: A working preset with a valid `preset.yml` manifest
+2. **Git Repository**: Preset hosted on GitHub (or other public git hosting)
+3. **Documentation**: README.md with description and usage instructions
+4. **License**: Open source license file (MIT, Apache 2.0, etc.)
+5. **Versioning**: Semantic versioning (e.g., 1.0.0)
+6. **Testing**: Preset tested on real projects with `specify preset add --dev`
+
+---
+
+## Prepare Your Preset
+
+### 1. Preset Structure
+
+Ensure your preset follows the standard structure:
+
+```text
+your-preset/
+├── preset.yml                 # Required: Preset manifest
+├── README.md                  # Required: Documentation
+├── LICENSE                    # Required: License file
+├── CHANGELOG.md               # Recommended: Version history
+│
+├── templates/                 # Template overrides
+│   ├── spec-template.md
+│   ├── plan-template.md
+│   └── ...
+│
+└── commands/                  # Command overrides (optional)
+    └── speckit.specify.md
+```
+
+Start from the [scaffold](scaffold/) if you're creating a new preset.
+
+### 2. preset.yml Validation
+
+Verify your manifest is valid:
+
+```yaml
+schema_version: "1.0"
+
+preset:
+  id: "your-preset"               # Unique lowercase-hyphenated ID
+  name: "Your Preset Name"        # Human-readable name
+  version: "1.0.0"                # Semantic version
+  description: "Brief description (one sentence)"
+  author: "Your Name or Organization"
+  repository: "https://github.com/your-org/spec-kit-preset-your-preset"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.1.0"      # Required spec-kit version
+
+provides:
+  templates:
+    - type: "template"
+      name: "spec-template"
+      file: "templates/spec-template.md"
+      description: "Custom spec template"
+      replaces: "spec-template"
+
+tags:                              # 2-5 relevant tags
+  - "category"
+  - "workflow"
+```
+
+**Validation Checklist**:
+
+- ✅ `id` is lowercase with hyphens only (no underscores, spaces, or special characters)
+- ✅ `version` follows semantic versioning (X.Y.Z)
+- ✅ `description` is concise (under 200 characters)
+- ✅ `repository` URL is valid and public
+- ✅ All template and command files exist in the preset directory
+- ✅ Template names are lowercase with hyphens only
+- ✅ Command names use dot notation (e.g. `speckit.specify`)
+- ✅ Tags are lowercase and descriptive
+
+### 3. Test Locally
+
+```bash
+# Install from local directory
+specify preset add --dev /path/to/your-preset
+
+# Verify templates resolve from your preset
+specify preset resolve spec-template
+
+# Verify preset info
+specify preset info your-preset
+
+# List installed presets
+specify preset list
+
+# Remove when done testing
+specify preset remove your-preset
+```
+
+If your preset includes command overrides, verify they appear in the agent directories:
+
+```bash
+# Check Claude commands (if using Claude)
+ls .claude/commands/speckit.*.md
+
+# Check Copilot commands (if using Copilot)
+ls .github/agents/speckit.*.agent.md
+
+# Check Gemini commands (if using Gemini)
+ls .gemini/commands/speckit.*.toml
+```
+
+### 4. Create GitHub Release
+
+Create a GitHub release for your preset version:
+
+```bash
+# Tag the release
+git tag v1.0.0
+git push origin v1.0.0
+```
+
+The release archive URL will be:
+
+```text
+https://github.com/your-org/spec-kit-preset-your-preset/archive/refs/tags/v1.0.0.zip
+```
+
+### 5. Test Installation from Archive
+
+```bash
+specify preset add --from https://github.com/your-org/spec-kit-preset-your-preset/archive/refs/tags/v1.0.0.zip
+```
+
+---
+
+## Submit to Catalog
+
+### Understanding the Catalogs
+
+Spec Kit uses a dual-catalog system:
+
+- **`catalog.json`** — Official, verified presets (install allowed by default)
+- **`catalog.community.json`** — Community-contributed presets (discovery only by default)
+
+All community presets should be submitted to `catalog.community.json`.
+
+### 1. Fork the spec-kit Repository
+
+```bash
+git clone https://github.com/YOUR-USERNAME/spec-kit.git
+cd spec-kit
+```
+
+### 2. Add Preset to Community Catalog
+
+Edit `presets/catalog.community.json` and add your preset.
+
+> **⚠️ Entries must be sorted alphabetically by preset ID.** Insert your preset in the correct position within the `"presets"` object.
+
+```json
+{
+  "schema_version": "1.0",
+  "updated_at": "2026-03-10T00:00:00Z",
+  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/presets/catalog.community.json",
+  "presets": {
+    "your-preset": {
+      "name": "Your Preset Name",
+      "description": "Brief description of what your preset provides",
+      "author": "Your Name",
+      "version": "1.0.0",
+      "download_url": "https://github.com/your-org/spec-kit-preset-your-preset/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/your-org/spec-kit-preset-your-preset",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "templates": 3,
+        "commands": 1
+      },
+      "tags": [
+        "category",
+        "workflow"
+      ],
+      "created_at": "2026-03-10T00:00:00Z",
+      "updated_at": "2026-03-10T00:00:00Z"
+    }
+  }
+}
+```
+
+### 3. Submit Pull Request
+
+```bash
+git checkout -b add-your-preset
+git add presets/catalog.community.json
+git commit -m "Add your-preset to community catalog
+
+- Preset ID: your-preset
+- Version: 1.0.0
+- Author: Your Name
+- Description: Brief description
+"
+git push origin add-your-preset
+```
+
+**Pull Request Checklist**:
+
+```markdown
+## Preset Submission
+
+**Preset Name**: Your Preset Name
+**Preset ID**: your-preset
+**Version**: 1.0.0
+**Repository**: https://github.com/your-org/spec-kit-preset-your-preset
+
+### Checklist
+- [ ] Valid preset.yml manifest
+- [ ] README.md with description and usage
+- [ ] LICENSE file included
+- [ ] GitHub release created
+- [ ] Preset tested with `specify preset add --dev`
+- [ ] Templates resolve correctly (`specify preset resolve`)
+- [ ] Commands register to agent directories (if applicable)
+- [ ] Commands match template sections (command + template are coherent)
+- [ ] Added to presets/catalog.community.json
+```
+
+---
+
+## Verification Process
+
+After submission, maintainers will review:
+
+1. **Manifest validation** — valid `preset.yml`, all files exist
+2. **Template quality** — templates are useful and well-structured
+3. **Command coherence** — commands reference sections that exist in templates
+4. **Security** — no malicious content, safe file operations
+5. **Documentation** — clear README explaining what the preset does
+
+Once verified, `verified: true` is set and the preset appears in `specify preset search`.
+
+---
+
+## Release Workflow
+
+When releasing a new version:
+
+1. Update `version` in `preset.yml`
+2. Update CHANGELOG.md
+3. Tag and push: `git tag v1.1.0 && git push origin v1.1.0`
+4. Submit PR to update `version` and `download_url` in `presets/catalog.community.json`
+
+---
+
+## Best Practices
+
+### Template Design
+
+- **Keep sections clear** — use headings and placeholder text the LLM can replace
+- **Match commands to templates** — if your preset overrides a command, make sure it references the sections in your template
+- **Document customization points** — use HTML comments to guide users on what to change
+
+### Naming
+
+- Preset IDs should be descriptive: `healthcare-compliance`, `enterprise-safe`, `startup-lean`
+- Avoid generic names: `my-preset`, `custom`, `test`
+
+### Stacking
+
+- Design presets to work well when stacked with others
+- Only override templates you need to change
+- Document which templates and commands your preset modifies
+
+### Command Overrides
+
+- Only override commands when the workflow needs to change, not just the output format
+- If you only need different template sections, a template override is sufficient
+- Test command overrides with multiple agents (Claude, Gemini, Copilot)
--- a/presets/README.md
+++ b/presets/README.md
@@ -0,0 +1,115 @@
+# Presets
+
+Presets are stackable, priority-ordered collections of template and command overrides for Spec Kit. They let you customize both the artifacts produced by the Spec-Driven Development workflow (specs, plans, tasks, checklists, constitutions) and the commands that guide the LLM in creating them — without forking or modifying core files.
+
+## How It Works
+
+When Spec Kit needs a template (e.g. `spec-template`), it walks a resolution stack:
+
+1. `.specify/templates/overrides/` — project-local one-off overrides
+2. `.specify/presets/<preset-id>/templates/` — installed presets (sorted by priority)
+3. `.specify/extensions/<ext-id>/templates/` — extension-provided templates
+4. `.specify/templates/` — core templates shipped with Spec Kit
+
+If no preset is installed, core templates are used — exactly the same behavior as before presets existed.
+
+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.
+
+## Quick Start
+
+```bash
+# Search available presets
+specify preset search
+
+# Install a preset from the catalog
+specify preset add healthcare-compliance
+
+# Install from a local directory (for development)
+specify preset add --dev ./my-preset
+
+# Install with a specific priority (lower = higher precedence)
+specify preset add healthcare-compliance --priority 5
+
+# List installed presets
+specify preset list
+
+# See which template a name resolves to
+specify preset resolve spec-template
+
+# Get detailed info about a preset
+specify preset info healthcare-compliance
+
+# Remove a preset
+specify preset remove healthcare-compliance
+```
+
+## Stacking Presets
+
+Multiple presets can be installed simultaneously. The `--priority` flag controls which one wins when two presets provide the same template (lower number = higher precedence):
+
+```bash
+specify preset add enterprise-safe --priority 10      # base layer
+specify preset add healthcare-compliance --priority 5  # overrides enterprise-safe
+specify preset add pm-workflow --priority 1            # overrides everything
+```
+
+Presets **override**, they don't merge. If two presets both provide `spec-template`, the one with the lowest priority number wins entirely.
+
+## Catalog Management
+
+Presets are discovered through catalogs. By default, Spec Kit uses the official and community catalogs:
+
+```bash
+# List active catalogs
+specify preset catalog list
+
+# Add a custom catalog
+specify preset catalog add https://example.com/catalog.json --name my-org --install-allowed
+
+# Remove a catalog
+specify preset catalog remove my-org
+```
+
+## Creating a Preset
+
+See [scaffold/](scaffold/) for a scaffold you can copy to create your own preset.
+
+1. Copy `scaffold/` to a new directory
+2. Edit `preset.yml` with your preset's metadata
+3. Add or replace templates in `templates/`
+4. Test locally with `specify preset add --dev .`
+5. Verify with `specify preset resolve spec-template`
+
+## Environment Variables
+
+| Variable | Description |
+|----------|-------------|
+| `SPECKIT_PRESET_CATALOG_URL` | Override the catalog URL (replaces all defaults) |
+
+## Configuration Files
+
+| File | Scope | Description |
+|------|-------|-------------|
+| `.specify/preset-catalogs.yml` | Project | Custom catalog stack for this project |
+| `~/.specify/preset-catalogs.yml` | User | Custom catalog stack for all projects |
+
+## Future Considerations
+
+The following enhancements are under consideration for future releases:
+
+- **Composition strategies** — Allow presets to declare a `strategy` per template instead of the default `replace`:
+
+  | Type | `replace` | `prepend` | `append` | `wrap` |
+  |------|-----------|-----------|----------|--------|
+  | **template** | ✓ (default) | ✓ | ✓ | ✓ |
+  | **command** | ✓ (default) | ✓ | ✓ | ✓ |
+  | **script** | ✓ (default) | — | — | ✓ |
+
+  For artifacts and commands (which are LLM directives), `wrap` would inject preset content before and after the core template using a `{CORE_TEMPLATE}` placeholder. For scripts, `wrap` would run custom logic before/after the core script via a `$CORE_SCRIPT` variable.
+- **Script overrides** — Enable presets to provide alternative versions of core scripts (e.g. `create-new-feature.sh`) for workflow customization. A `strategy: "wrap"` option could allow presets to run custom logic before/after the core script without fully replacing it.
--- a/presets/catalog.community.json
+++ b/presets/catalog.community.json
@@ -0,0 +1,6 @@
+{
+  "schema_version": "1.0",
+  "updated_at": "2026-03-09T00:00:00Z",
+  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/presets/catalog.community.json",
+  "presets": {}
+}
--- a/presets/catalog.json
+++ b/presets/catalog.json
@@ -0,0 +1,6 @@
+{
+  "schema_version": "1.0",
+  "updated_at": "2026-03-10T00:00:00Z",
+  "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/presets/catalog.json",
+  "presets": {}
+}
--- a/presets/scaffold/README.md
+++ b/presets/scaffold/README.md
@@ -0,0 +1,46 @@
+# My Preset
+
+A custom preset for Spec Kit. Copy this directory and customize it to create your own.
+
+## Templates Included
+
+| Template | Type | Description |
+|----------|------|-------------|
+| `spec-template` | template | Custom feature specification template (overrides core and extensions) |
+| `myext-template` | template | Override of the myext extension's report template |
+| `speckit.specify` | command | Custom specification command (overrides core) |
+| `speckit.myext.myextcmd` | command | Override of the myext extension's myextcmd command |
+
+## Development
+
+1. Copy this directory: `cp -r presets/scaffold my-preset`
+2. Edit `preset.yml` — set your preset's ID, name, description, and templates
+3. Add or modify templates in `templates/`
+4. Test locally: `specify preset add --dev ./my-preset`
+5. Verify resolution: `specify preset resolve spec-template`
+6. Remove when done testing: `specify preset remove my-preset`
+
+## Manifest Reference (`preset.yml`)
+
+Required fields:
+- `schema_version` — always `"1.0"`
+- `preset.id` — lowercase alphanumeric with hyphens
+- `preset.name` — human-readable name
+- `preset.version` — semantic version (e.g. `1.0.0`)
+- `preset.description` — brief description
+- `requires.speckit_version` — version constraint (e.g. `>=0.1.0`)
+- `provides.templates` — list of templates with `type`, `name`, and `file`
+
+## Template Types
+
+- **template** — Document scaffolds (spec-template.md, plan-template.md, tasks-template.md, etc.)
+- **command** — AI agent workflow prompts (e.g. speckit.specify, speckit.plan)
+- **script** — Custom scripts (reserved for future use)
+
+## Publishing
+
+See the [Preset Publishing Guide](../PUBLISHING.md) for details on submitting to the catalog.
+
+## License
+
+MIT
--- a/presets/scaffold/commands/speckit.myext.myextcmd.md
+++ b/presets/scaffold/commands/speckit.myext.myextcmd.md
@@ -0,0 +1,20 @@
+---
+description: "Override of the myext extension's myextcmd command"
+---
+
+<!-- Preset override for speckit.myext.myextcmd -->
+
+You are following a customized version of the myext extension's myextcmd command.
+
+When executing this command:
+
+1. Read the user's input from $ARGUMENTS
+2. Follow the standard myextcmd workflow
+3. Additionally, apply the following customizations from this preset:
+   - Add compliance checks before proceeding
+   - Include audit trail entries in the output
+
+> CUSTOMIZE: Replace the instructions above with your own.
+> This file overrides the command that the "myext" extension provides.
+> When this preset is installed, all agents (Claude, Gemini, Copilot, etc.)
+> will use this version instead of the extension's original.
--- a/presets/scaffold/commands/speckit.specify.md
+++ b/presets/scaffold/commands/speckit.specify.md
@@ -0,0 +1,23 @@
+---
+description: "Create a feature specification (preset override)"
+scripts:
+  sh: scripts/bash/create-new-feature.sh "{ARGS}"
+  ps: scripts/powershell/create-new-feature.ps1 "{ARGS}"
+---
+
+## User Input
+
+```text
+$ARGUMENTS
+```
+
+Given the feature description above:
+
+1. **Create the feature branch** by running the script:
+   - Bash: `{SCRIPT} --json --short-name "<short-name>" "<description>"`
+   - The JSON output contains BRANCH_NAME and SPEC_FILE paths.
+
+2. **Read the spec-template** to see the sections you need to fill.
+
+3. **Write the specification** to SPEC_FILE, replacing the placeholders in each section
+   (Overview, Requirements, Acceptance Criteria) with details from the user's description.
--- a/presets/scaffold/preset.yml
+++ b/presets/scaffold/preset.yml
@@ -0,0 +1,91 @@
+schema_version: "1.0"
+
+preset:
+  # CUSTOMIZE: Change 'my-preset' to your preset ID (lowercase, hyphen-separated)
+  id: "my-preset"
+
+  # CUSTOMIZE: Human-readable name for your preset
+  name: "My Preset"
+
+  # CUSTOMIZE: Update version when releasing (semantic versioning: X.Y.Z)
+  version: "1.0.0"
+
+  # CUSTOMIZE: Brief description (under 200 characters)
+  description: "Brief description of what your preset provides"
+
+  # CUSTOMIZE: Your name or organization name
+  author: "Your Name"
+
+  # CUSTOMIZE: GitHub repository URL (create before publishing)
+  repository: "https://github.com/your-org/spec-kit-preset-my-preset"
+
+  # REVIEW: License (MIT is recommended for open source)
+  license: "MIT"
+
+# Requirements for this preset
+requires:
+  # CUSTOMIZE: Minimum spec-kit version required
+  speckit_version: ">=0.1.0"
+
+# Templates provided by this preset
+provides:
+  templates:
+    # CUSTOMIZE: Define your template overrides
+    # Templates are document scaffolds (spec-template.md, plan-template.md, etc.)
+    - type: "template"
+      name: "spec-template"
+      file: "templates/spec-template.md"
+      description: "Custom feature specification template"
+      replaces: "spec-template"  # Which core template this overrides (optional)
+
+    # ADD MORE TEMPLATES: Copy this block for each template
+    # - type: "template"
+    #   name: "plan-template"
+    #   file: "templates/plan-template.md"
+    #   description: "Custom plan template"
+    #   replaces: "plan-template"
+
+    # OVERRIDE EXTENSION TEMPLATES:
+    # Presets sit above extensions in the resolution stack, so you can
+    # override templates provided by any installed extension.
+    # For example, if the "myext" extension provides a spec-template,
+    # the preset's version above will take priority automatically.
+
+    # Override a template provided by the "myext" extension:
+    - type: "template"
+      name: "myext-template"
+      file: "templates/myext-template.md"
+      description: "Override myext's report template"
+      replaces: "myext-template"
+
+    # Command overrides (AI agent workflow prompts)
+    # Presets can override both core and extension commands.
+    # Commands are automatically registered into all detected agent
+    # directories (.claude/commands/, .gemini/commands/, etc.)
+
+    # Override a core command:
+    - type: "command"
+      name: "speckit.specify"
+      file: "commands/speckit.specify.md"
+      description: "Custom specification command"
+      replaces: "speckit.specify"
+
+    # Override an extension command (e.g. from the "myext" extension):
+    - type: "command"
+      name: "speckit.myext.myextcmd"
+      file: "commands/speckit.myext.myextcmd.md"
+      description: "Override myext's myextcmd command with custom workflow"
+      replaces: "speckit.myext.myextcmd"
+
+    # Script templates (reserved for future use)
+    # - type: "script"
+    #   name: "create-new-feature"
+    #   file: "scripts/bash/create-new-feature.sh"
+    #   description: "Custom feature creation script"
+    #   replaces: "create-new-feature"
+
+# CUSTOMIZE: Add relevant tags (2-5 recommended)
+# Used for discovery in catalog
+tags:
+  - "example"
+  - "preset"
--- a/presets/scaffold/templates/myext-template.md
+++ b/presets/scaffold/templates/myext-template.md
@@ -0,0 +1,24 @@
+# MyExt Report
+
+> This template overrides the one provided by the "myext" extension.
+> Customize it to match your needs.
+
+## Summary
+
+Brief summary of the report.
+
+## Details
+
+- Detail 1
+- Detail 2
+
+## Actions
+
+- [ ] Action 1
+- [ ] Action 2
+
+<!--
+  CUSTOMIZE: This template takes priority over the myext extension's
+  version of myext-template. The extension's original is still available
+  if you remove this preset.
+-->
--- a/presets/scaffold/templates/spec-template.md
+++ b/presets/scaffold/templates/spec-template.md
@@ -0,0 +1,18 @@
+# Feature Specification: [FEATURE NAME]
+
+**Created**: [DATE]
+**Status**: Draft
+
+## Overview
+
+[Brief description of the feature]
+
+## Requirements
+
+- [ ] Requirement 1
+- [ ] Requirement 2
+
+## Acceptance Criteria
+
+- [ ] Criterion 1
+- [ ] Criterion 2
--- a/presets/self-test/commands/speckit.specify.md
+++ b/presets/self-test/commands/speckit.specify.md
@@ -0,0 +1,15 @@
+---
+description: "Self-test override of the specify command"
+---
+
+<!-- preset:self-test -->
+
+You are following the self-test preset's version of the specify command.
+
+When creating a specification, follow this process:
+
+1. Read the user's requirements from $ARGUMENTS
+2. Create a specification document using the spec-template
+3. Include all standard sections plus the self-test marker
+
+> This command is provided by the self-test preset.
--- a/presets/self-test/preset.yml
+++ b/presets/self-test/preset.yml
@@ -0,0 +1,61 @@
+schema_version: "1.0"
+
+preset:
+  id: "self-test"
+  name: "Self-Test Preset"
+  version: "1.0.0"
+  description: "A preset that overrides all core templates for testing purposes"
+  author: "github"
+  repository: "https://github.com/github/spec-kit"
+  license: "MIT"
+
+requires:
+  speckit_version: ">=0.1.0"
+
+provides:
+  templates:
+    - type: "template"
+      name: "spec-template"
+      file: "templates/spec-template.md"
+      description: "Self-test spec template"
+      replaces: "spec-template"
+
+    - type: "template"
+      name: "plan-template"
+      file: "templates/plan-template.md"
+      description: "Self-test plan template"
+      replaces: "plan-template"
+
+    - type: "template"
+      name: "tasks-template"
+      file: "templates/tasks-template.md"
+      description: "Self-test tasks template"
+      replaces: "tasks-template"
+
+    - type: "template"
+      name: "checklist-template"
+      file: "templates/checklist-template.md"
+      description: "Self-test checklist template"
+      replaces: "checklist-template"
+
+    - type: "template"
+      name: "constitution-template"
+      file: "templates/constitution-template.md"
+      description: "Self-test constitution template"
+      replaces: "constitution-template"
+
+    - type: "template"
+      name: "agent-file-template"
+      file: "templates/agent-file-template.md"
+      description: "Self-test agent file template"
+      replaces: "agent-file-template"
+
+    - type: "command"
+      name: "speckit.specify"
+      file: "commands/speckit.specify.md"
+      description: "Self-test override of the specify command"
+      replaces: "speckit.specify"
+
+tags:
+  - "testing"
+  - "self-test"
--- a/presets/self-test/templates/agent-file-template.md
+++ b/presets/self-test/templates/agent-file-template.md
@@ -0,0 +1,9 @@
+# Agent File (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Agent Instructions
+
+Follow these guidelines when working on this project.
--- a/presets/self-test/templates/checklist-template.md
+++ b/presets/self-test/templates/checklist-template.md
@@ -0,0 +1,15 @@
+# Checklist (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Pre-Implementation
+
+- [ ] Spec reviewed
+- [ ] Plan approved
+
+## Post-Implementation
+
+- [ ] Tests passing
+- [ ] Documentation updated
--- a/presets/self-test/templates/constitution-template.md
+++ b/presets/self-test/templates/constitution-template.md
@@ -0,0 +1,15 @@
+# Constitution (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Principles
+
+1. Principle 1
+2. Principle 2
+
+## Guidelines
+
+- Guideline 1
+- Guideline 2
--- a/presets/self-test/templates/plan-template.md
+++ b/presets/self-test/templates/plan-template.md
@@ -0,0 +1,22 @@
+# Implementation Plan (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Approach
+
+Describe the implementation approach.
+
+## Steps
+
+1. Step 1
+2. Step 2
+
+## Dependencies
+
+- Dependency 1
+
+## Risks
+
+- Risk 1
--- a/presets/self-test/templates/spec-template.md
+++ b/presets/self-test/templates/spec-template.md
@@ -0,0 +1,23 @@
+# Feature Specification (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Overview
+
+Brief description of the feature.
+
+## Requirements
+
+- Requirement 1
+- Requirement 2
+
+## Design
+
+Describe the design approach.
+
+## Acceptance Criteria
+
+- [ ] Criterion 1
+- [ ] Criterion 2
--- a/presets/self-test/templates/tasks-template.md
+++ b/presets/self-test/templates/tasks-template.md
@@ -0,0 +1,17 @@
+# Tasks (Self-Test Preset)
+
+<!-- preset:self-test -->
+
+> This template is provided by the self-test preset.
+
+## Task List
+
+- [ ] Task 1
+- [ ] Task 2
+
+## Estimation
+
+| Task | Estimate |
+|------|----------|
+| Task 1 | TBD |
+| Task 2 | TBD |
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "specify-cli"
-version = "0.2.1"
+version = "0.3.0"
 description = "Specify CLI, part of GitHub Spec Kit. A tool to bootstrap your projects for Spec-Driven Development (SDD)."
 requires-python = ">=3.11"
 dependencies = [
--- a/scripts/bash/check-prerequisites.sh
+++ b/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 [[ ${#docs[@]} -eq 0 ]]; then
+            json_docs="[]"
+        else
+            json_docs=$(printf '"%s",' "${docs[@]}")
+            json_docs="[${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"
--- a/scripts/bash/common.sh
+++ b/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
 }

@@ -134,23 +134,120 @@ 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 control characters (newline, tab, carriage return).
+json_escape() {
+    local s="$1"
+    s="${s//\\/\\\\}"
+    s="${s//\"/\\\"}"
+    s="${s//$'\n'/\\n}"
+    s="${s//$'\t'/\\t}"
+    s="${s//$'\r'/\\r}"
+    printf '%s' "$s"
 }

 check_file() { [[ -f "$1" ]] && echo "  ✓ $2" || echo "  ✗ $2"; }
 check_dir() { [[ -d "$1" && -n $(ls -A "$1" 2>/dev/null) ]] && echo "  ✓ $2" || echo "  ✗ $2"; }

+# Resolve a template name to a file path using the priority stack:
+#   1. .specify/templates/overrides/
+#   2. .specify/presets/<preset-id>/templates/ (sorted by priority from .registry)
+#   3. .specify/extensions/<ext-id>/templates/
+#   4. .specify/templates/ (core)
+resolve_template() {
+    local template_name="$1"
+    local repo_root="$2"
+    local base="$repo_root/.specify/templates"
+
+    # Priority 1: Project overrides
+    local override="$base/overrides/${template_name}.md"
+    [ -f "$override" ] && echo "$override" && return 0
+
+    # Priority 2: Installed presets (sorted by priority from .registry)
+    local presets_dir="$repo_root/.specify/presets"
+    if [ -d "$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 "
+import json, sys, os
+try:
+    with open(os.environ['SPECKIT_REGISTRY']) as f:
+        data = json.load(f)
+    presets = data.get('presets', {})
+    for pid, meta in sorted(presets.items(), key=lambda x: x[1].get('priority', 10)):
+        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"
+            else
+                # python3 returned empty list — fall through to directory scan
+                for preset in "$presets_dir"/*/; do
+                    [ -d "$preset" ] || continue
+                    local candidate="$preset/templates/${template_name}.md"
+                    [ -f "$candidate" ] && echo "$candidate" && return 0
+                done
+            fi
+        else
+            # Fallback: alphabetical directory order (no python3 available)
+            for preset in "$presets_dir"/*/; do
+                [ -d "$preset" ] || continue
+                local candidate="$preset/templates/${template_name}.md"
+                [ -f "$candidate" ] && echo "$candidate" && return 0
+            done
+        fi
+    fi
+
+    # Priority 3: Extension-provided templates
+    local ext_dir="$repo_root/.specify/extensions"
+    if [ -d "$ext_dir" ]; then
+        for ext in "$ext_dir"/*/; do
+            [ -d "$ext" ] || continue
+            # Skip hidden directories (e.g. .backup, .cache)
+            case "$(basename "$ext")" in .*) continue;; esac
+            local candidate="$ext/templates/${template_name}.md"
+            [ -f "$candidate" ] && echo "$candidate" && return 0
+        done
+    fi
+
+    # Priority 4: Core templates
+    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 "$TEMPLATE" ] to detect "not found".
+    return 0
+}
+
--- a/scripts/bash/create-new-feature.sh
+++ b/scripts/bash/create-new-feature.sh
@@ -162,10 +162,22 @@ clean_branch_name() {
    echo "$name" | tr '[:upper:]' '[:lower:]' | sed 's/[^a-z0-9]/-/g' | sed 's/-\+/-/g' | sed 's/^-//' | sed 's/-$//'
 }

+# Escape a string for safe embedding in a JSON value (fallback when jq is unavailable).
+json_escape() {
+    local s="$1"
+    s="${s//\\/\\\\}"
+    s="${s//\"/\\\"}"
+    s="${s//$'\n'/\\n}"
+    s="${s//$'\t'/\\t}"
+    s="${s//$'\r'/\\r}"
+    printf '%s' "$s"
+}
+
 # Resolve repository root. Prefer git information when available, but fall back
 # to searching for repository markers so the workflow still functions in repositories that
 # were initialised with --no-git.
 SCRIPT_DIR="$(CDPATH="" cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+source "$SCRIPT_DIR/common.sh"

 if git rev-parse --show-toplevel >/dev/null 2>&1; then
    REPO_ROOT=$(git rev-parse --show-toplevel)
@@ -296,18 +308,26 @@ fi
 FEATURE_DIR="$SPECS_DIR/$BRANCH_NAME"
 mkdir -p "$FEATURE_DIR"

-TEMPLATE="$REPO_ROOT/.specify/templates/spec-template.md"
+TEMPLATE=$(resolve_template "spec-template" "$REPO_ROOT")
 SPEC_FILE="$FEATURE_DIR/spec.md"
-if [ -f "$TEMPLATE" ]; then cp "$TEMPLATE" "$SPEC_FILE"; else touch "$SPEC_FILE"; fi
+if [ -n "$TEMPLATE" ] && [ -f "$TEMPLATE" ]; then cp "$TEMPLATE" "$SPEC_FILE"; else 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
--- a/scripts/bash/setup-plan.sh
+++ b/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
@@ -37,20 +39,30 @@ check_feature_branch "$CURRENT_BRANCH" "$HAS_GIT" || exit 1
 mkdir -p "$FEATURE_DIR"

 # Copy plan template if it exists
-TEMPLATE="$REPO_ROOT/.specify/templates/plan-template.md"
-if [[ -f "$TEMPLATE" ]]; then
+TEMPLATE=$(resolve_template "plan-template" "$REPO_ROOT")
+if [[ -n "$TEMPLATE" ]] && [[ -f "$TEMPLATE" ]]; then
    cp "$TEMPLATE" "$IMPL_PLAN"
    echo "Copied plan template to $IMPL_PLAN"
 else
-    echo "Warning: Plan template not found at $TEMPLATE"
+    echo "Warning: Plan template not found"
    # Create a basic plan file if template doesn't exist
    touch "$IMPL_PLAN"
 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: $IMPL_PLAN" 
--- a/scripts/bash/update-agent-context.sh
+++ b/scripts/bash/update-agent-context.sh
@@ -53,7 +53,9 @@ SCRIPT_DIR="$(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:-}"
@@ -71,12 +73,14 @@ 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="$REPO_ROOT/AGENTS.md"
+# AMP, Kiro CLI, and IBM Bob all share AGENTS.md — use AGENTS_FILE to avoid
+# updating the same file multiple times.
+AMP_FILE="$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"

@@ -112,6 +116,8 @@ 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 +482,7 @@ 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"
@@ -607,67 +613,67 @@ 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
            ;;
        generic)
            log_info "Generic agent: no predefined context file. Use the agent-specific update script for your agent."
@@ -682,106 +688,53 @@ update_specific_agent() {

 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
+    local _updated_paths=()

-    if [[ -f "$AUGGIE_FILE" ]]; then
-        update_agent_file "$AUGGIE_FILE" "Auggie CLI"
+    # 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.
+    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
+        update_agent_file "$file" "$name" || return 1
+        _updated_paths+=("$real_path")
        found_agent=true
-    fi
-    
-    if [[ -f "$ROO_FILE" ]]; then
-        update_agent_file "$ROO_FILE" "Roo Code"
-        found_agent=true
-    fi
+    }

-    if [[ -f "$CODEBUDDY_FILE" ]]; then
-        update_agent_file "$CODEBUDDY_FILE" "CodeBuddy CLI"
-        found_agent=true
-    fi
+    update_if_new "$CLAUDE_FILE" "Claude Code"
+    update_if_new "$GEMINI_FILE" "Gemini CLI"
+    update_if_new "$COPILOT_FILE" "GitHub Copilot"
+    update_if_new "$CURSOR_FILE" "Cursor IDE"
+    update_if_new "$QWEN_FILE" "Qwen Code"
+    update_if_new "$AGENTS_FILE" "Codex/opencode"
+    update_if_new "$AMP_FILE" "Amp"
+    update_if_new "$KIRO_FILE" "Kiro CLI"
+    update_if_new "$BOB_FILE" "IBM Bob"
+    update_if_new "$WINDSURF_FILE" "Windsurf"
+    update_if_new "$KILOCODE_FILE" "Kilo Code"
+    update_if_new "$AUGGIE_FILE" "Auggie CLI"
+    update_if_new "$ROO_FILE" "Roo Code"
+    update_if_new "$CODEBUDDY_FILE" "CodeBuddy CLI"
+    update_if_new "$SHAI_FILE" "SHAI"
+    update_if_new "$TABNINE_FILE" "Tabnine CLI"
+    update_if_new "$QODER_FILE" "Qoder CLI"
+    update_if_new "$AGY_FILE" "Antigravity"
+    update_if_new "$VIBE_FILE" "Mistral Vibe"
+    update_if_new "$KIMI_FILE" "Kimi Code"

-    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 [[ "$found_agent" == false ]]; then
        log_info "No existing agent files found, creating default Claude file..."
-        update_agent_file "$CLAUDE_FILE" "Claude Code"
+        update_agent_file "$CLAUDE_FILE" "Claude Code" || return 1
    fi
 }
 print_summary() {
--- a/scripts/powershell/common.ps1
+++ b/scripts/powershell/common.ps1
@@ -135,3 +135,70 @@ function Test-DirHasFiles {
    }
 }

+# Resolve a template name to a file path using the priority stack:
+#   1. .specify/templates/overrides/
+#   2. .specify/presets/<preset-id>/templates/ (sorted by priority from .registry)
+#   3. .specify/extensions/<ext-id>/templates/
+#   4. .specify/templates/ (core)
+function Resolve-Template {
+    param(
+        [Parameter(Mandatory=$true)][string]$TemplateName,
+        [Parameter(Mandatory=$true)][string]$RepoRoot
+    )
+
+    $base = Join-Path $RepoRoot '.specify/templates'
+
+    # Priority 1: Project overrides
+    $override = Join-Path $base "overrides/$TemplateName.md"
+    if (Test-Path $override) { return $override }
+
+    # Priority 2: Installed presets (sorted by priority from .registry)
+    $presetsDir = Join-Path $RepoRoot '.specify/presets'
+    if (Test-Path $presetsDir) {
+        $registryFile = Join-Path $presetsDir '.registry'
+        $sortedPresets = @()
+        if (Test-Path $registryFile) {
+            try {
+                $registryData = Get-Content $registryFile -Raw | ConvertFrom-Json
+                $presets = $registryData.presets
+                if ($presets) {
+                    $sortedPresets = $presets.PSObject.Properties |
+                        Sort-Object { if ($null -ne $_.Value.priority) { $_.Value.priority } else { 10 } } |
+                        ForEach-Object { $_.Name }
+                }
+            } catch {
+                # Fallback: alphabetical directory order
+                $sortedPresets = @()
+            }
+        }
+
+        if ($sortedPresets.Count -gt 0) {
+            foreach ($presetId in $sortedPresets) {
+                $candidate = Join-Path $presetsDir "$presetId/templates/$TemplateName.md"
+                if (Test-Path $candidate) { return $candidate }
+            }
+        } else {
+            # Fallback: alphabetical directory order
+            foreach ($preset in Get-ChildItem -Path $presetsDir -Directory -ErrorAction SilentlyContinue | Where-Object { $_.Name -notlike '.*' }) {
+                $candidate = Join-Path $preset.FullName "templates/$TemplateName.md"
+                if (Test-Path $candidate) { return $candidate }
+            }
+        }
+    }
+
+    # Priority 3: Extension-provided templates
+    $extDir = Join-Path $RepoRoot '.specify/extensions'
+    if (Test-Path $extDir) {
+        foreach ($ext in Get-ChildItem -Path $extDir -Directory -ErrorAction SilentlyContinue | Where-Object { $_.Name -notlike '.*' } | Sort-Object Name) {
+            $candidate = Join-Path $ext.FullName "templates/$TemplateName.md"
+            if (Test-Path $candidate) { return $candidate }
+        }
+    }
+
+    # Priority 4: Core templates
+    $core = Join-Path $base "$TemplateName.md"
+    if (Test-Path $core) { return $core }
+
+    return $null
+}
+
--- a/scripts/powershell/create-new-feature.ps1
+++ b/scripts/powershell/create-new-feature.ps1
@@ -141,6 +141,9 @@ if (-not $fallbackRoot) {
    exit 1
 }

+# Load common functions (includes Resolve-Template)
+. "$PSScriptRoot/common.ps1"
+
 try {
    $repoRoot = git rev-parse --show-toplevel 2>$null
    if ($LASTEXITCODE -eq 0) {
@@ -276,9 +279,9 @@ if ($hasGit) {
 $featureDir = Join-Path $specsDir $branchName
 New-Item -ItemType Directory -Path $featureDir -Force | Out-Null

-$template = Join-Path $repoRoot '.specify/templates/spec-template.md'
+$template = Resolve-Template -TemplateName 'spec-template' -RepoRoot $repoRoot
 $specFile = Join-Path $featureDir 'spec.md'
-if (Test-Path $template) { 
+if ($template -and (Test-Path $template)) { 
    Copy-Item $template $specFile -Force 
 } else { 
    New-Item -ItemType File -Path $specFile | Out-Null 
--- a/scripts/powershell/setup-plan.ps1
+++ b/scripts/powershell/setup-plan.ps1
@@ -32,12 +32,12 @@ if (-not (Test-FeatureBranch -Branch $paths.CURRENT_BRANCH -HasGit $paths.HAS_GI
 New-Item -ItemType Directory -Path $paths.FEATURE_DIR -Force | Out-Null

 # Copy plan template if it exists, otherwise note it or create empty file
-$template = Join-Path $paths.REPO_ROOT '.specify/templates/plan-template.md'
-if (Test-Path $template) { 
+$template = Resolve-Template -TemplateName 'plan-template' -RepoRoot $paths.REPO_ROOT
+if ($template -and (Test-Path $template)) { 
    Copy-Item $template $paths.IMPL_PLAN -Force
    Write-Output "Copied plan template to $($paths.IMPL_PLAN)"
 } else {
-    Write-Warning "Plan template not found at $template"
+    Write-Warning "Plan template not found"
    # Create a basic plan file if template doesn't exist
    New-Item -ItemType File -Path $paths.IMPL_PLAN -Force | Out-Null
 }
--- a/scripts/powershell/update-agent-context.ps1
+++ b/scripts/powershell/update-agent-context.ps1
@@ -331,7 +331,7 @@ function Update-ExistingAgentFile {
            if ($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}',$Date.ToString('yyyy-MM-dd')))
            continue
        }
--- a/src/specify_cli/init.py
+++ b/src/specify_cli/init.py
--- a/src/specify_cli/agents.py
+++ b/src/specify_cli/agents.py
@@ -0,0 +1,422 @@
+"""
+Agent Command Registrar for Spec Kit
+
+Shared infrastructure for registering commands with AI agents.
+Used by both the extension system and the preset system to write
+command files into agent-specific directories in the correct format.
+"""
+
+from pathlib import Path
+from typing import Dict, List, Any
+
+import yaml
+
+
+class CommandRegistrar:
+    """Handles registration of commands with AI agents.
+
+    Supports writing command files in Markdown or TOML format to the
+    appropriate agent directory, with correct argument placeholders
+    and companion files (e.g. Copilot .prompt.md).
+    """
+
+    # Agent configurations with directory, format, and argument placeholder
+    AGENT_CONFIGS = {
+        "claude": {
+            "dir": ".claude/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "gemini": {
+            "dir": ".gemini/commands",
+            "format": "toml",
+            "args": "{{args}}",
+            "extension": ".toml"
+        },
+        "copilot": {
+            "dir": ".github/agents",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".agent.md"
+        },
+        "cursor": {
+            "dir": ".cursor/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "qwen": {
+            "dir": ".qwen/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "opencode": {
+            "dir": ".opencode/command",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "codex": {
+            "dir": ".codex/prompts",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "windsurf": {
+            "dir": ".windsurf/workflows",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "kilocode": {
+            "dir": ".kilocode/workflows",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "auggie": {
+            "dir": ".augment/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "roo": {
+            "dir": ".roo/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "codebuddy": {
+            "dir": ".codebuddy/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "qodercli": {
+            "dir": ".qoder/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "kiro-cli": {
+            "dir": ".kiro/prompts",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "amp": {
+            "dir": ".agents/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "shai": {
+            "dir": ".shai/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "tabnine": {
+            "dir": ".tabnine/agent/commands",
+            "format": "toml",
+            "args": "{{args}}",
+            "extension": ".toml"
+        },
+        "bob": {
+            "dir": ".bob/commands",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": ".md"
+        },
+        "kimi": {
+            "dir": ".kimi/skills",
+            "format": "markdown",
+            "args": "$ARGUMENTS",
+            "extension": "/SKILL.md"
+        }
+    }
+
+    @staticmethod
+    def parse_frontmatter(content: str) -> tuple[dict, str]:
+        """Parse YAML frontmatter from Markdown content.
+
+        Args:
+            content: Markdown content with YAML frontmatter
+
+        Returns:
+            Tuple of (frontmatter_dict, body_content)
+        """
+        if not content.startswith("---"):
+            return {}, content
+
+        # Find second ---
+        end_marker = content.find("---", 3)
+        if end_marker == -1:
+            return {}, content
+
+        frontmatter_str = content[3:end_marker].strip()
+        body = content[end_marker + 3:].strip()
+
+        try:
+            frontmatter = yaml.safe_load(frontmatter_str) or {}
+        except yaml.YAMLError:
+            frontmatter = {}
+
+        return frontmatter, body
+
+    @staticmethod
+    def render_frontmatter(fm: dict) -> str:
+        """Render frontmatter dictionary as YAML.
+
+        Args:
+            fm: Frontmatter dictionary
+
+        Returns:
+            YAML-formatted frontmatter with delimiters
+        """
+        if not fm:
+            return ""
+
+        yaml_str = yaml.dump(fm, default_flow_style=False, sort_keys=False)
+        return f"---\n{yaml_str}---\n"
+
+    def _adjust_script_paths(self, frontmatter: dict) -> dict:
+        """Adjust script paths from extension-relative to repo-relative.
+
+        Args:
+            frontmatter: Frontmatter dictionary
+
+        Returns:
+            Modified frontmatter with adjusted paths
+        """
+        if "scripts" in frontmatter:
+            for key in frontmatter["scripts"]:
+                script_path = frontmatter["scripts"][key]
+                if script_path.startswith("../../scripts/"):
+                    frontmatter["scripts"][key] = f".specify/scripts/{script_path[14:]}"
+        return frontmatter
+
+    def render_markdown_command(
+        self,
+        frontmatter: dict,
+        body: str,
+        source_id: str,
+        context_note: str = None
+    ) -> str:
+        """Render command in Markdown format.
+
+        Args:
+            frontmatter: Command frontmatter
+            body: Command body content
+            source_id: Source identifier (extension or preset ID)
+            context_note: Custom context comment (default: <!-- Source: {source_id} -->)
+
+        Returns:
+            Formatted Markdown command file content
+        """
+        if context_note is None:
+            context_note = f"\n<!-- Source: {source_id} -->\n"
+        return self.render_frontmatter(frontmatter) + "\n" + context_note + body
+
+    def render_toml_command(
+        self,
+        frontmatter: dict,
+        body: str,
+        source_id: str
+    ) -> str:
+        """Render command in TOML format.
+
+        Args:
+            frontmatter: Command frontmatter
+            body: Command body content
+            source_id: Source identifier (extension or preset ID)
+
+        Returns:
+            Formatted TOML command file content
+        """
+        toml_lines = []
+
+        if "description" in frontmatter:
+            desc = frontmatter["description"].replace('"', '\\"')
+            toml_lines.append(f'description = "{desc}"')
+            toml_lines.append("")
+
+        toml_lines.append(f"# Source: {source_id}")
+        toml_lines.append("")
+
+        toml_lines.append('prompt = """')
+        toml_lines.append(body)
+        toml_lines.append('"""')
+
+        return "\n".join(toml_lines)
+
+    def _convert_argument_placeholder(self, content: str, from_placeholder: str, to_placeholder: str) -> str:
+        """Convert argument placeholder format.
+
+        Args:
+            content: Command content
+            from_placeholder: Source placeholder (e.g., "$ARGUMENTS")
+            to_placeholder: Target placeholder (e.g., "{{args}}")
+
+        Returns:
+            Content with converted placeholders
+        """
+        return content.replace(from_placeholder, to_placeholder)
+
+    def register_commands(
+        self,
+        agent_name: str,
+        commands: List[Dict[str, Any]],
+        source_id: str,
+        source_dir: Path,
+        project_root: Path,
+        context_note: str = None
+    ) -> List[str]:
+        """Register commands for a specific agent.
+
+        Args:
+            agent_name: Agent name (claude, gemini, copilot, etc.)
+            commands: List of command info dicts with 'name', 'file', and optional 'aliases'
+            source_id: Identifier of the source (extension or preset ID)
+            source_dir: Directory containing command source files
+            project_root: Path to project root
+            context_note: Custom context comment for markdown output
+
+        Returns:
+            List of registered command names
+
+        Raises:
+            ValueError: If agent is not supported
+        """
+        if agent_name not in self.AGENT_CONFIGS:
+            raise ValueError(f"Unsupported agent: {agent_name}")
+
+        agent_config = self.AGENT_CONFIGS[agent_name]
+        commands_dir = project_root / agent_config["dir"]
+        commands_dir.mkdir(parents=True, exist_ok=True)
+
+        registered = []
+
+        for cmd_info in commands:
+            cmd_name = cmd_info["name"]
+            cmd_file = cmd_info["file"]
+
+            source_file = source_dir / cmd_file
+            if not source_file.exists():
+                continue
+
+            content = source_file.read_text(encoding="utf-8")
+            frontmatter, body = self.parse_frontmatter(content)
+
+            frontmatter = self._adjust_script_paths(frontmatter)
+
+            body = self._convert_argument_placeholder(
+                body, "$ARGUMENTS", agent_config["args"]
+            )
+
+            if agent_config["format"] == "markdown":
+                output = self.render_markdown_command(frontmatter, body, source_id, context_note)
+            elif agent_config["format"] == "toml":
+                output = self.render_toml_command(frontmatter, body, source_id)
+            else:
+                raise ValueError(f"Unsupported format: {agent_config['format']}")
+
+            dest_file = commands_dir / f"{cmd_name}{agent_config['extension']}"
+            dest_file.parent.mkdir(parents=True, exist_ok=True)
+            dest_file.write_text(output, encoding="utf-8")
+
+            if agent_name == "copilot":
+                self.write_copilot_prompt(project_root, cmd_name)
+
+            registered.append(cmd_name)
+
+            for alias in cmd_info.get("aliases", []):
+                alias_file = commands_dir / f"{alias}{agent_config['extension']}"
+                alias_file.parent.mkdir(parents=True, exist_ok=True)
+                alias_file.write_text(output, encoding="utf-8")
+                if agent_name == "copilot":
+                    self.write_copilot_prompt(project_root, alias)
+                registered.append(alias)
+
+        return registered
+
+    @staticmethod
+    def write_copilot_prompt(project_root: Path, cmd_name: str) -> None:
+        """Generate a companion .prompt.md file for a Copilot agent command.
+
+        Args:
+            project_root: Path to project root
+            cmd_name: Command name (e.g. 'speckit.my-ext.example')
+        """
+        prompts_dir = project_root / ".github" / "prompts"
+        prompts_dir.mkdir(parents=True, exist_ok=True)
+        prompt_file = prompts_dir / f"{cmd_name}.prompt.md"
+        prompt_file.write_text(f"---\nagent: {cmd_name}\n---\n", encoding="utf-8")
+
+    def register_commands_for_all_agents(
+        self,
+        commands: List[Dict[str, Any]],
+        source_id: str,
+        source_dir: Path,
+        project_root: Path,
+        context_note: str = None
+    ) -> Dict[str, List[str]]:
+        """Register commands for all detected agents in the project.
+
+        Args:
+            commands: List of command info dicts
+            source_id: Identifier of the source (extension or preset ID)
+            source_dir: Directory containing command source files
+            project_root: Path to project root
+            context_note: Custom context comment for markdown output
+
+        Returns:
+            Dictionary mapping agent names to list of registered commands
+        """
+        results = {}
+
+        for agent_name, agent_config in self.AGENT_CONFIGS.items():
+            agent_dir = project_root / agent_config["dir"].split("/")[0]
+
+            if agent_dir.exists():
+                try:
+                    registered = self.register_commands(
+                        agent_name, commands, source_id, source_dir, project_root,
+                        context_note=context_note
+                    )
+                    if registered:
+                        results[agent_name] = registered
+                except ValueError:
+                    continue
+
+        return results
+
+    def unregister_commands(
+        self,
+        registered_commands: Dict[str, List[str]],
+        project_root: Path
+    ) -> None:
+        """Remove previously registered command files from agent directories.
+
+        Args:
+            registered_commands: Dict mapping agent names to command name lists
+            project_root: Path to project root
+        """
+        for agent_name, cmd_names in registered_commands.items():
+            if agent_name not in self.AGENT_CONFIGS:
+                continue
+
+            agent_config = self.AGENT_CONFIGS[agent_name]
+            commands_dir = project_root / agent_config["dir"]
+
+            for cmd_name in cmd_names:
+                cmd_file = commands_dir / f"{cmd_name}{agent_config['extension']}"
+                if cmd_file.exists():
+                    cmd_file.unlink()
+
+                if agent_name == "copilot":
+                    prompt_file = project_root / ".github" / "prompts" / f"{cmd_name}.prompt.md"
+                    if prompt_file.exists():
+                        prompt_file.unlink()
--- a/src/specify_cli/extensions.py
+++ b/src/specify_cli/extensions.py
@@ -12,6 +12,7 @@ import os
 import tempfile
 import zipfile
 import shutil
+import copy
 from dataclasses import dataclass
 from pathlib import Path
 from typing import Optional, Dict, List, Any, Callable, Set
@@ -228,6 +229,54 @@ class ExtensionRegistry:
        }
        self._save()

+    def update(self, extension_id: str, metadata: dict):
+        """Update extension metadata in registry, merging with existing entry.
+
+        Merges the provided metadata with the existing entry, preserving any
+        fields not specified in the new metadata. The installed_at timestamp
+        is always preserved from the original entry.
+
+        Use this method instead of add() when updating existing extension
+        metadata (e.g., enabling/disabling) to preserve the original
+        installation timestamp and other existing fields.
+
+        Args:
+            extension_id: Extension ID
+            metadata: Extension metadata fields to update (merged with existing)
+
+        Raises:
+            KeyError: If extension is not installed
+        """
+        if extension_id not in self.data["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}
+        # 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)
+        self.data["extensions"][extension_id] = merged
+        self._save()
+
+    def restore(self, extension_id: str, metadata: dict):
+        """Restore extension 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:
+            extension_id: Extension ID
+            metadata: Complete extension metadata including installed_at
+        """
+        self.data["extensions"][extension_id] = dict(metadata)
+        self._save()
+
    def remove(self, extension_id: str):
        """Remove extension from registry.

@@ -241,21 +290,28 @@ class ExtensionRegistry:
    def get(self, extension_id: str) -> Optional[dict]:
        """Get extension metadata from registry.

+        Returns a deep copy to prevent callers from accidentally mutating
+        nested internal registry state without going through the write path.
+
        Args:
            extension_id: Extension ID

        Returns:
-            Extension metadata or None if not found
+            Deep copy of extension metadata, or None if not found
        """
-        return self.data["extensions"].get(extension_id)
+        entry = self.data["extensions"].get(extension_id)
+        return copy.deepcopy(entry) if entry is not None else None

    def list(self) -> Dict[str, dict]:
        """Get all installed extensions.

+        Returns a deep copy of the extensions mapping to prevent callers
+        from accidentally mutating nested internal registry state.
+
        Returns:
-            Dictionary of extension_id -> metadata
+            Dictionary of extension_id -> metadata (deep copies)
        """
-        return self.data["extensions"]
+        return copy.deepcopy(self.data["extensions"])

    def is_installed(self, extension_id: str) -> bool:
        """Check if extension is installed.
@@ -522,23 +578,7 @@ class ExtensionManager:
        # Unregister commands from all AI agents
        if registered_commands:
            registrar = CommandRegistrar()
-            for agent_name, cmd_names in registered_commands.items():
-                if agent_name not in registrar.AGENT_CONFIGS:
-                    continue
-
-                agent_config = registrar.AGENT_CONFIGS[agent_name]
-                commands_dir = self.project_root / agent_config["dir"]
-
-                for cmd_name in cmd_names:
-                    cmd_file = commands_dir / f"{cmd_name}{agent_config['extension']}"
-                    if cmd_file.exists():
-                        cmd_file.unlink()
-
-                    # Also remove companion .prompt.md for Copilot
-                    if agent_name == "copilot":
-                        prompt_file = self.project_root / ".github" / "prompts" / f"{cmd_name}.prompt.md"
-                        if prompt_file.exists():
-                            prompt_file.unlink()
+            registrar.unregister_commands(registered_commands, self.project_root)

        if keep_config:
            # Preserve config files, only remove non-config files
@@ -600,7 +640,7 @@ class ExtensionManager:
                result.append({
                    "id": ext_id,
                    "name": manifest.name,
-                    "version": metadata["version"],
+                    "version": metadata.get("version", "unknown"),
                    "description": manifest.description,
                    "enabled": metadata.get("enabled", True),
                    "installed_at": metadata.get("installed_at"),
@@ -662,255 +702,47 @@ def version_satisfies(current: str, required: str) -> bool:


 class CommandRegistrar:
-    """Handles registration of extension commands with AI agents."""
+    """Handles registration of extension commands with AI agents.

-    # Agent configurations with directory, format, and argument placeholder
-    AGENT_CONFIGS = {
-        "claude": {
-            "dir": ".claude/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "gemini": {
-            "dir": ".gemini/commands",
-            "format": "toml",
-            "args": "{{args}}",
-            "extension": ".toml"
-        },
-        "copilot": {
-            "dir": ".github/agents",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".agent.md"
-        },
-        "cursor": {
-            "dir": ".cursor/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "qwen": {
-            "dir": ".qwen/commands",
-            "format": "toml",
-            "args": "{{args}}",
-            "extension": ".toml"
-        },
-        "opencode": {
-            "dir": ".opencode/command",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "codex": {
-            "dir": ".codex/prompts",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "windsurf": {
-            "dir": ".windsurf/workflows",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "kilocode": {
-            "dir": ".kilocode/rules",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "auggie": {
-            "dir": ".augment/rules",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "roo": {
-            "dir": ".roo/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "codebuddy": {
-            "dir": ".codebuddy/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "qodercli": {
-            "dir": ".qoder/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "kiro-cli": {
-            "dir": ".kiro/prompts",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "amp": {
-            "dir": ".agents/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "shai": {
-            "dir": ".shai/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "tabnine": {
-            "dir": ".tabnine/agent/commands",
-            "format": "toml",
-            "args": "{{args}}",
-            "extension": ".toml"
-        },
-        "bob": {
-            "dir": ".bob/commands",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": ".md"
-        },
-        "kimi": {
-            "dir": ".kimi/skills",
-            "format": "markdown",
-            "args": "$ARGUMENTS",
-            "extension": "/SKILL.md"
-        }
-    }
+    This is a backward-compatible wrapper around the shared CommandRegistrar
+    in agents.py. Extension-specific methods accept ExtensionManifest objects
+    and delegate to the generic API.
+    """

+    # Re-export AGENT_CONFIGS at class level for direct attribute access
+    from .agents import CommandRegistrar as _AgentRegistrar
+    AGENT_CONFIGS = _AgentRegistrar.AGENT_CONFIGS
+
+    def __init__(self):
+        from .agents import CommandRegistrar as _Registrar
+        self._registrar = _Registrar()
+
+    # Delegate static/utility methods
    @staticmethod
    def parse_frontmatter(content: str) -> tuple[dict, str]:
-        """Parse YAML frontmatter from Markdown content.
-
-        Args:
-            content: Markdown content with YAML frontmatter
-
-        Returns:
-            Tuple of (frontmatter_dict, body_content)
-        """
-        if not content.startswith("---"):
-            return {}, content
-
-        # Find second ---
-        end_marker = content.find("---", 3)
-        if end_marker == -1:
-            return {}, content
-
-        frontmatter_str = content[3:end_marker].strip()
-        body = content[end_marker + 3:].strip()
-
-        try:
-            frontmatter = yaml.safe_load(frontmatter_str) or {}
-        except yaml.YAMLError:
-            frontmatter = {}
-
-        return frontmatter, body
+        from .agents import CommandRegistrar as _Registrar
+        return _Registrar.parse_frontmatter(content)

    @staticmethod
    def render_frontmatter(fm: dict) -> str:
-        """Render frontmatter dictionary as YAML.
+        from .agents import CommandRegistrar as _Registrar
+        return _Registrar.render_frontmatter(fm)

-        Args:
-            fm: Frontmatter dictionary
+    @staticmethod
+    def _write_copilot_prompt(project_root, cmd_name: str) -> None:
+        from .agents import CommandRegistrar as _Registrar
+        _Registrar.write_copilot_prompt(project_root, cmd_name)

-        Returns:
-            YAML-formatted frontmatter with delimiters
-        """
-        if not fm:
-            return ""
-
-        yaml_str = yaml.dump(fm, default_flow_style=False, sort_keys=False)
-        return f"---\n{yaml_str}---\n"
-
-    def _adjust_script_paths(self, frontmatter: dict) -> dict:
-        """Adjust script paths from extension-relative to repo-relative.
-
-        Args:
-            frontmatter: Frontmatter dictionary
-
-        Returns:
-            Modified frontmatter with adjusted paths
-        """
-        if "scripts" in frontmatter:
-            for key in frontmatter["scripts"]:
-                script_path = frontmatter["scripts"][key]
-                if script_path.startswith("../../scripts/"):
-                    frontmatter["scripts"][key] = f".specify/scripts/{script_path[14:]}"
-        return frontmatter
-
-    def _render_markdown_command(
-        self,
-        frontmatter: dict,
-        body: str,
-        ext_id: str
-    ) -> str:
-        """Render command in Markdown format.
-
-        Args:
-            frontmatter: Command frontmatter
-            body: Command body content
-            ext_id: Extension ID
-
-        Returns:
-            Formatted Markdown command file content
-        """
+    def _render_markdown_command(self, frontmatter, body, ext_id):
+        # Preserve extension-specific comment format for backward compatibility
        context_note = f"\n<!-- Extension: {ext_id} -->\n<!-- Config: .specify/extensions/{ext_id}/ -->\n"
-        return self.render_frontmatter(frontmatter) + "\n" + context_note + body
+        return self._registrar.render_frontmatter(frontmatter) + "\n" + context_note + body

-    def _render_toml_command(
-        self,
-        frontmatter: dict,
-        body: str,
-        ext_id: str
-    ) -> str:
-        """Render command in TOML format.
-
-        Args:
-            frontmatter: Command frontmatter
-            body: Command body content
-            ext_id: Extension ID
-
-        Returns:
-            Formatted TOML command file content
-        """
-        # TOML format for Gemini/Qwen
-        toml_lines = []
-
-        # Add description if present
-        if "description" in frontmatter:
-            # Escape quotes in description
-            desc = frontmatter["description"].replace('"', '\\"')
-            toml_lines.append(f'description = "{desc}"')
-            toml_lines.append("")
-
-        # Add extension context as comments
-        toml_lines.append(f"# Extension: {ext_id}")
-        toml_lines.append(f"# Config: .specify/extensions/{ext_id}/")
-        toml_lines.append("")
-
-        # Add prompt content
-        toml_lines.append('prompt = """')
-        toml_lines.append(body)
-        toml_lines.append('"""')
-
-        return "\n".join(toml_lines)
-
-    def _convert_argument_placeholder(self, content: str, from_placeholder: str, to_placeholder: str) -> str:
-        """Convert argument placeholder format.
-
-        Args:
-            content: Command content
-            from_placeholder: Source placeholder (e.g., "$ARGUMENTS")
-            to_placeholder: Target placeholder (e.g., "{{args}}")
-
-        Returns:
-            Content with converted placeholders
-        """
-        return content.replace(from_placeholder, to_placeholder)
+    def _render_toml_command(self, frontmatter, body, ext_id):
+        # Preserve extension-specific context comments for backward compatibility
+        base = self._registrar.render_toml_command(frontmatter, body, ext_id)
+        context_lines = f"# Extension: {ext_id}\n# Config: .specify/extensions/{ext_id}/\n"
+        return base.rstrip("\n") + "\n" + context_lines

    def register_commands_for_agent(
        self,
@@ -919,96 +751,14 @@ class CommandRegistrar:
        extension_dir: Path,
        project_root: Path
    ) -> List[str]:
-        """Register extension commands for a specific agent.
-
-        Args:
-            agent_name: Agent name (claude, gemini, copilot, etc.)
-            manifest: Extension manifest
-            extension_dir: Path to extension directory
-            project_root: Path to project root
-
-        Returns:
-            List of registered command names
-
-        Raises:
-            ExtensionError: If agent is not supported
-        """
+        """Register extension commands for a specific agent."""
        if agent_name not in self.AGENT_CONFIGS:
            raise ExtensionError(f"Unsupported agent: {agent_name}")
-
-        agent_config = self.AGENT_CONFIGS[agent_name]
-        commands_dir = project_root / agent_config["dir"]
-        commands_dir.mkdir(parents=True, exist_ok=True)
-
-        registered = []
-
-        for cmd_info in manifest.commands:
-            cmd_name = cmd_info["name"]
-            cmd_file = cmd_info["file"]
-
-            # Read source command file
-            source_file = extension_dir / cmd_file
-            if not source_file.exists():
-                continue
-
-            content = source_file.read_text()
-            frontmatter, body = self.parse_frontmatter(content)
-
-            # Adjust script paths
-            frontmatter = self._adjust_script_paths(frontmatter)
-
-            # Convert argument placeholders
-            body = self._convert_argument_placeholder(
-                body, "$ARGUMENTS", agent_config["args"]
-            )
-
-            # Render in agent-specific format
-            if agent_config["format"] == "markdown":
-                output = self._render_markdown_command(frontmatter, body, manifest.id)
-            elif agent_config["format"] == "toml":
-                output = self._render_toml_command(frontmatter, body, manifest.id)
-            else:
-                raise ExtensionError(f"Unsupported format: {agent_config['format']}")
-
-            # Write command file
-            dest_file = commands_dir / f"{cmd_name}{agent_config['extension']}"
-            dest_file.parent.mkdir(parents=True, exist_ok=True)
-            dest_file.write_text(output)
-
-            # Generate companion .prompt.md for Copilot agents
-            if agent_name == "copilot":
-                self._write_copilot_prompt(project_root, cmd_name)
-
-            registered.append(cmd_name)
-
-            # Register aliases
-            for alias in cmd_info.get("aliases", []):
-                alias_file = commands_dir / f"{alias}{agent_config['extension']}"
-                alias_file.parent.mkdir(parents=True, exist_ok=True)
-                alias_file.write_text(output)
-                # Generate companion .prompt.md for alias too
-                if agent_name == "copilot":
-                    self._write_copilot_prompt(project_root, alias)
-                registered.append(alias)
-
-        return registered
-
-    @staticmethod
-    def _write_copilot_prompt(project_root: Path, cmd_name: str) -> None:
-        """Generate a companion .prompt.md file for a Copilot agent command.
-
-        Copilot requires a .prompt.md file in .github/prompts/ that references
-        the corresponding .agent.md file in .github/agents/ via an ``agent:``
-        frontmatter field.
-
-        Args:
-            project_root: Path to project root
-            cmd_name: Command name (used as the file stem, e.g. 'speckit.my-ext.example')
-        """
-        prompts_dir = project_root / ".github" / "prompts"
-        prompts_dir.mkdir(parents=True, exist_ok=True)
-        prompt_file = prompts_dir / f"{cmd_name}.prompt.md"
-        prompt_file.write_text(f"---\nagent: {cmd_name}\n---\n")
+        context_note = f"\n<!-- Extension: {manifest.id} -->\n<!-- Config: .specify/extensions/{manifest.id}/ -->\n"
+        return self._registrar.register_commands(
+            agent_name, manifest.commands, manifest.id, extension_dir, project_root,
+            context_note=context_note
+        )

    def register_commands_for_all_agents(
        self,
@@ -1016,35 +766,20 @@ class CommandRegistrar:
        extension_dir: Path,
        project_root: Path
    ) -> Dict[str, List[str]]:
-        """Register extension commands for all detected agents.
+        """Register extension commands for all detected agents."""
+        context_note = f"\n<!-- Extension: {manifest.id} -->\n<!-- Config: .specify/extensions/{manifest.id}/ -->\n"
+        return self._registrar.register_commands_for_all_agents(
+            manifest.commands, manifest.id, extension_dir, project_root,
+            context_note=context_note
+        )

-        Args:
-            manifest: Extension manifest
-            extension_dir: Path to extension directory
-            project_root: Path to project root
-
-        Returns:
-            Dictionary mapping agent names to list of registered commands
-        """
-        results = {}
-
-        # Detect which agents are present in the project
-        for agent_name, agent_config in self.AGENT_CONFIGS.items():
-            agent_dir = project_root / agent_config["dir"].split("/")[0]
-
-            # Register if agent directory exists
-            if agent_dir.exists():
-                try:
-                    registered = self.register_commands_for_agent(
-                        agent_name, manifest, extension_dir, project_root
-                    )
-                    if registered:
-                        results[agent_name] = registered
-                except ExtensionError:
-                    # Skip agent on error
-                    continue
-
-        return results
+    def unregister_commands(
+        self,
+        registered_commands: Dict[str, List[str]],
+        project_root: Path
+    ) -> None:
+        """Remove previously registered command files from agent directories."""
+        self._registrar.unregister_commands(registered_commands, project_root)

    def register_commands_for_claude(
        self,
@@ -1052,16 +787,7 @@ class CommandRegistrar:
        extension_dir: Path,
        project_root: Path
    ) -> List[str]:
-        """Register extension commands for Claude Code agent.
-
-        Args:
-            manifest: Extension manifest
-            extension_dir: Path to extension directory
-            project_root: Path to project root
-
-        Returns:
-            List of registered command names
-        """
+        """Register extension commands for Claude Code agent."""
        return self.register_commands_for_agent("claude", manifest, extension_dir, project_root)


@@ -1112,12 +838,13 @@ class ExtensionCatalog:
            config_path: Path to extension-catalogs.yml

        Returns:
-            Ordered list of CatalogEntry objects, or None if file doesn't exist
-            or contains no valid catalog entries.
+            Ordered list of CatalogEntry objects, or None if file doesn't exist.

        Raises:
            ValidationError: If any catalog entry has an invalid URL,
-                the file cannot be parsed, or a priority value is invalid.
+                the file cannot be parsed, a priority value is invalid,
+                or the file exists but contains no valid catalog entries
+                (fail-closed for security).
        """
        if not config_path.exists():
            return None
@@ -1129,12 +856,17 @@ class ExtensionCatalog:
            )
        catalogs_data = data.get("catalogs", [])
        if not catalogs_data:
-            return None
+            # File exists but has no catalogs key or empty list - fail closed
+            raise ValidationError(
+                f"Catalog config {config_path} exists but contains no 'catalogs' entries. "
+                f"Remove the file to use built-in defaults, or add valid catalog entries."
+            )
        if not isinstance(catalogs_data, list):
            raise ValidationError(
                f"Invalid catalog config: 'catalogs' must be a list, got {type(catalogs_data).__name__}"
            )
        entries: List[CatalogEntry] = []
+        skipped_entries: List[int] = []
        for idx, item in enumerate(catalogs_data):
            if not isinstance(item, dict):
                raise ValidationError(
@@ -1142,6 +874,7 @@ class ExtensionCatalog:
                )
            url = str(item.get("url", "")).strip()
            if not url:
+                skipped_entries.append(idx)
                continue
            self._validate_catalog_url(url)
            try:
@@ -1164,7 +897,14 @@ class ExtensionCatalog:
                description=str(item.get("description", "")),
            ))
        entries.sort(key=lambda e: e.priority)
-        return entries if entries else None
+        if not entries:
+            # All entries were invalid (missing URLs) - fail closed for security
+            raise ValidationError(
+                f"Catalog config {config_path} contains {len(catalogs_data)} entries but none have valid URLs "
+                f"(entries at indices {skipped_entries} were skipped). "
+                f"Each catalog entry must have a 'url' field."
+            )
+        return entries

    def get_active_catalogs(self) -> List[CatalogEntry]:
        """Get the ordered list of active catalogs.
--- a/src/specify_cli/presets.py
+++ b/src/specify_cli/presets.py
--- a/templates/commands/specify.md
+++ b/templates/commands/specify.md
@@ -129,7 +129,7 @@ Given that feature description, do this:

   c. **Handle Validation Results**:

-      - **If all items pass**: Mark checklist complete and proceed to step 6
+      - **If all items pass**: Mark checklist complete and proceed to step 7

      - **If items fail (excluding [NEEDS CLARIFICATION])**:
        1. List the failing items and specific issues
@@ -178,8 +178,6 @@ Given that feature description, do this:

 **NOTE:** The script creates and checks out the new branch and initializes the spec file before writing.

-## General Guidelines
-
 ## Quick Guidelines

 - Focus on **WHAT** users need and **WHY**.
--- a/tests/test_agent_config_consistency.py
+++ b/tests/test_agent_config_consistency.py
@@ -62,7 +62,14 @@ class TestAgentConfigConsistency:
        ps_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.ps1").read_text(encoding="utf-8")

        assert re.search(r"'shai'\s*\{.*?\.shai/commands", ps_text, re.S) is not None
-        assert re.search(r"'agy'\s*\{.*?\.agent/workflows", ps_text, re.S) is not None
+        assert re.search(r"'agy'\s*\{.*?\.agent/commands", ps_text, re.S) is not None
+
+    def test_release_sh_switch_has_shai_and_agy_generation(self):
+        """Bash release builder must generate files for shai and agy agents."""
+        sh_text = (REPO_ROOT / ".github" / "workflows" / "scripts" / "create-release-packages.sh").read_text(encoding="utf-8")
+
+        assert re.search(r"shai\)\s*\n.*?\.shai/commands", sh_text, re.S) is not None
+        assert re.search(r"agy\)\s*\n.*?\.agent/commands", sh_text, re.S) is not None

    def test_init_ai_help_includes_roo_and_kiro_alias(self):
        """CLI help text for --ai should stay in sync with agent config and alias guidance."""
--- a/tests/test_ai_skills.py
+++ b/tests/test_ai_skills.py
@@ -132,6 +132,16 @@ def commands_dir_gemini(project_dir):
    return cmd_dir


+@pytest.fixture
+def commands_dir_qwen(project_dir):
+    """Create a populated .qwen/commands directory (Markdown format)."""
+    cmd_dir = project_dir / ".qwen" / "commands"
+    cmd_dir.mkdir(parents=True, exist_ok=True)
+    for name in ["speckit.specify.md", "speckit.plan.md", "speckit.tasks.md"]:
+        (cmd_dir / name).write_text(f"# {name}\nContent here\n")
+    return cmd_dir
+
+
 # ===== _get_skills_dir Tests =====

 class TestGetSkillsDir:
@@ -390,6 +400,28 @@ class TestInstallAiSkills:
        # .toml commands should be untouched
        assert (cmds_dir / "speckit.specify.toml").exists()

+    def test_qwen_md_commands_dir_installs_skills(self, project_dir):
+        """Qwen now uses Markdown format; skills should install directly from .qwen/commands/."""
+        cmds_dir = project_dir / ".qwen" / "commands"
+        cmds_dir.mkdir(parents=True)
+        (cmds_dir / "speckit.specify.md").write_text(
+            "---\ndescription: Create or update the feature specification.\n---\n\n# Specify\n\nBody.\n"
+        )
+        (cmds_dir / "speckit.plan.md").write_text(
+            "---\ndescription: Generate implementation plan.\n---\n\n# Plan\n\nBody.\n"
+        )
+
+        result = install_ai_skills(project_dir, "qwen")
+
+        assert result is True
+        skills_dir = project_dir / ".qwen" / "skills"
+        assert skills_dir.exists()
+        skill_dirs = [d.name for d in skills_dir.iterdir() if d.is_dir()]
+        assert len(skill_dirs) >= 1
+        # .md commands should be untouched
+        assert (cmds_dir / "speckit.specify.md").exists()
+        assert (cmds_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."""
@@ -446,6 +478,15 @@ class TestCommandCoexistence:
        remaining = list(commands_dir_gemini.glob("speckit.*"))
        assert len(remaining) == 3

+    def test_existing_commands_preserved_qwen(self, project_dir, templates_dir, commands_dir_qwen):
+        """install_ai_skills must NOT remove pre-existing .qwen/commands files."""
+        assert len(list(commands_dir_qwen.glob("speckit.*"))) == 3
+
+        install_ai_skills(project_dir, "qwen")
+
+        remaining = list(commands_dir_qwen.glob("speckit.*"))
+        assert len(remaining) == 3
+
    def test_commands_dir_not_removed(self, project_dir, templates_dir, commands_dir_claude):
        """install_ai_skills must not remove the commands directory."""
        install_ai_skills(project_dir, "claude")
@@ -661,6 +702,59 @@ class TestCliValidation:
        assert "Usage:" in result.output
        assert "--ai" in result.output

+    def test_agy_without_ai_skills_fails(self):
+        """--ai agy without --ai-skills should fail with exit code 1."""
+        from typer.testing import CliRunner
+
+        runner = CliRunner()
+        result = runner.invoke(app, ["init", "test-proj", "--ai", "agy"])
+
+        assert result.exit_code == 1
+        assert "Explicit command support was deprecated in Antigravity version 1.20.5." in result.output
+        assert "--ai-skills" in result.output
+
+    def test_interactive_agy_without_ai_skills_prompts_skills(self, monkeypatch):
+        """Interactive selector returning agy without --ai-skills should automatically enable --ai-skills."""
+        from typer.testing import CliRunner
+
+        # Mock select_with_arrows to simulate the user picking 'agy' for AI,
+        # and return a deterministic default for any other prompts to avoid
+        # calling the real interactive implementation.
+        def _fake_select_with_arrows(*args, **kwargs):
+            options = kwargs.get("options")
+            if options is None and len(args) >= 1:
+                options = args[0]
+
+            # If the options include 'agy', simulate selecting it.
+            if isinstance(options, dict) and "agy" in options:
+                return "agy"
+            if isinstance(options, (list, tuple)) and "agy" in options:
+                return "agy"
+
+            # For any other prompt, return a deterministic, non-interactive default:
+            # pick the first option if available.
+            if isinstance(options, dict) and options:
+                return next(iter(options.keys()))
+            if isinstance(options, (list, tuple)) and options:
+                return options[0]
+
+            # If no options are provided, fall back to None (should not occur in normal use).
+            return None
+
+        monkeypatch.setattr("specify_cli.select_with_arrows", _fake_select_with_arrows)
+        
+        # Mock download_and_extract_template to prevent real HTTP downloads during testing
+        monkeypatch.setattr("specify_cli.download_and_extract_template", lambda *args, **kwargs: None)
+        # We need to bypass the `git init` step, wait, it has `--no-git` by default in tests maybe?
+        runner = CliRunner()
+        # Create temp dir to avoid directory already exists errors or whatever
+        with runner.isolated_filesystem():
+            result = runner.invoke(app, ["init", "test-proj", "--no-git"])
+
+            # Interactive selection should NOT raise the deprecation error!
+            assert result.exit_code == 0
+            assert "Explicit command support was deprecated" not in result.output
+
    def test_ai_skills_flag_appears_in_help(self):
        """--ai-skills should appear in init --help output."""
        from typer.testing import CliRunner
--- a/tests/test_extensions.py
+++ b/tests/test_extensions.py
@@ -277,6 +277,135 @@ class TestExtensionRegistry:
        assert registry2.is_installed("test-ext")
        assert registry2.get("test-ext")["version"] == "1.0.0"

+    def test_update_preserves_installed_at(self, temp_dir):
+        """Test that update() preserves the original installed_at timestamp."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {"version": "1.0.0", "enabled": True})
+
+        # Get original installed_at
+        original_data = registry.get("test-ext")
+        original_installed_at = original_data["installed_at"]
+
+        # Update with new metadata
+        registry.update("test-ext", {"version": "2.0.0", "enabled": False})
+
+        # Verify installed_at is preserved
+        updated_data = registry.get("test-ext")
+        assert updated_data["installed_at"] == original_installed_at
+        assert updated_data["version"] == "2.0.0"
+        assert updated_data["enabled"] is False
+
+    def test_update_merges_with_existing(self, temp_dir):
+        """Test that update() merges new metadata with existing fields."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {
+            "version": "1.0.0",
+            "enabled": True,
+            "registered_commands": {"claude": ["cmd1", "cmd2"]},
+        })
+
+        # Update with partial metadata (only enabled field)
+        registry.update("test-ext", {"enabled": False})
+
+        # Verify existing fields are preserved
+        updated_data = registry.get("test-ext")
+        assert updated_data["enabled"] is False
+        assert updated_data["version"] == "1.0.0"  # Preserved
+        assert updated_data["registered_commands"] == {"claude": ["cmd1", "cmd2"]}  # Preserved
+
+    def test_update_raises_for_missing_extension(self, temp_dir):
+        """Test that update() raises KeyError for non-installed extension."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+
+        with pytest.raises(KeyError, match="not installed"):
+            registry.update("nonexistent-ext", {"enabled": False})
+
+    def test_restore_overwrites_completely(self, temp_dir):
+        """Test that restore() overwrites the registry entry completely."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {"version": "2.0.0", "enabled": True})
+
+        # Restore with complete backup data
+        backup_data = {
+            "version": "1.0.0",
+            "enabled": False,
+            "installed_at": "2024-01-01T00:00:00+00:00",
+            "registered_commands": {"claude": ["old-cmd"]},
+        }
+        registry.restore("test-ext", backup_data)
+
+        # Verify entry is exactly as restored
+        restored_data = registry.get("test-ext")
+        assert restored_data == backup_data
+
+    def test_restore_can_recreate_removed_entry(self, temp_dir):
+        """Test that restore() can recreate an entry after remove()."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        registry.add("test-ext", {"version": "1.0.0"})
+
+        # Save backup and remove
+        backup = registry.get("test-ext").copy()
+        registry.remove("test-ext")
+        assert not registry.is_installed("test-ext")
+
+        # Restore should recreate the entry
+        registry.restore("test-ext", backup)
+        assert registry.is_installed("test-ext")
+        assert registry.get("test-ext")["version"] == "1.0.0"
+
+    def test_get_returns_deep_copy(self, temp_dir):
+        """Test that get() returns deep copies for nested structures."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        metadata = {
+            "version": "1.0.0",
+            "registered_commands": {"claude": ["cmd1"]},
+        }
+        registry.add("test-ext", metadata)
+
+        fetched = registry.get("test-ext")
+        fetched["registered_commands"]["claude"].append("cmd2")
+
+        # Internal registry must remain unchanged.
+        internal = registry.data["extensions"]["test-ext"]
+        assert internal["registered_commands"] == {"claude": ["cmd1"]}
+
+    def test_list_returns_deep_copy(self, temp_dir):
+        """Test that list() returns deep copies for nested structures."""
+        extensions_dir = temp_dir / "extensions"
+        extensions_dir.mkdir()
+
+        registry = ExtensionRegistry(extensions_dir)
+        metadata = {
+            "version": "1.0.0",
+            "registered_commands": {"claude": ["cmd1"]},
+        }
+        registry.add("test-ext", metadata)
+
+        listed = registry.list()
+        listed["test-ext"]["registered_commands"]["claude"].append("cmd2")
+
+        # Internal registry must remain unchanged.
+        internal = registry.data["extensions"]["test-ext"]
+        assert internal["registered_commands"] == {"claude": ["cmd1"]}
+

 # ===== ExtensionManager Tests =====

@@ -412,6 +541,15 @@ class TestCommandRegistrar:
        assert "codex" in CommandRegistrar.AGENT_CONFIGS
        assert CommandRegistrar.AGENT_CONFIGS["codex"]["dir"] == ".codex/prompts"

+    def test_qwen_agent_config_is_markdown(self):
+        """Qwen should use Markdown format with $ARGUMENTS (not TOML)."""
+        assert "qwen" in CommandRegistrar.AGENT_CONFIGS
+        cfg = CommandRegistrar.AGENT_CONFIGS["qwen"]
+        assert cfg["dir"] == ".qwen/commands"
+        assert cfg["format"] == "markdown"
+        assert cfg["args"] == "$ARGUMENTS"
+        assert cfg["extension"] == ".md"
+
    def test_parse_frontmatter_valid(self):
        """Test parsing valid YAML frontmatter."""
        content = """---
@@ -1402,8 +1540,8 @@ class TestCatalogStack:
        with pytest.raises(ValidationError, match="HTTPS"):
            catalog.get_active_catalogs()

-    def test_empty_project_config_falls_back_to_defaults(self, temp_dir):
-        """Empty catalogs list in config falls back to default stack."""
+    def test_empty_project_config_raises_error(self, temp_dir):
+        """Empty catalogs list in config raises ValidationError (fail-closed for security)."""
        import yaml as yaml_module

        project_dir = self._make_project(temp_dir)
@@ -1412,11 +1550,32 @@ class TestCatalogStack:
            yaml_module.dump({"catalogs": []}, f)

        catalog = ExtensionCatalog(project_dir)
-        entries = catalog.get_active_catalogs()

-        # Falls back to default stack
-        assert len(entries) == 2
-        assert entries[0].url == ExtensionCatalog.DEFAULT_CATALOG_URL
+        # Fail-closed: empty config should raise, not fall back to defaults
+        with pytest.raises(ValidationError) as exc_info:
+            catalog.get_active_catalogs()
+        assert "contains no 'catalogs' entries" in str(exc_info.value)
+
+    def test_catalog_entries_without_urls_raises_error(self, temp_dir):
+        """Catalog entries without URLs raise ValidationError (fail-closed for security)."""
+        import yaml as yaml_module
+
+        project_dir = self._make_project(temp_dir)
+        config_path = project_dir / ".specify" / "extension-catalogs.yml"
+        with open(config_path, "w") as f:
+            yaml_module.dump({
+                "catalogs": [
+                    {"name": "no-url-catalog", "priority": 1},
+                    {"name": "another-no-url", "description": "Also missing URL"},
+                ]
+            }, f)
+
+        catalog = ExtensionCatalog(project_dir)
+
+        # Fail-closed: entries without URLs should raise, not fall back to defaults
+        with pytest.raises(ValidationError) as exc_info:
+            catalog.get_active_catalogs()
+        assert "none have valid URLs" in str(exc_info.value)

    # --- _load_catalog_config ---

@@ -1943,3 +2102,238 @@ class TestExtensionIgnore:
        assert not (dest / "docs" / "guide.md").exists()
        assert not (dest / "docs" / "internal.md").exists()
        assert (dest / "docs" / "api.md").exists()
+
+
+class TestExtensionAddCLI:
+    """CLI integration tests for extension add command."""
+
+    def test_add_by_display_name_uses_resolved_id_for_download(self, tmp_path):
+        """extension add by display name should use resolved ID for download_extension()."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch, MagicMock
+        from specify_cli import app
+
+        runner = CliRunner()
+
+        # Create project structure
+        project_dir = tmp_path / "test-project"
+        project_dir.mkdir()
+        (project_dir / ".specify").mkdir()
+        (project_dir / ".specify" / "extensions").mkdir(parents=True)
+
+        # Mock catalog that returns extension by display name
+        mock_catalog = MagicMock()
+        mock_catalog.get_extension_info.return_value = None  # ID lookup fails
+        mock_catalog.search.return_value = [
+            {
+                "id": "acme-jira-integration",
+                "name": "Jira Integration",
+                "version": "1.0.0",
+                "description": "Jira integration extension",
+                "_install_allowed": True,
+            }
+        ]
+
+        # Track what ID was passed to download_extension
+        download_called_with = []
+        def mock_download(extension_id):
+            download_called_with.append(extension_id)
+            # Return a path that will fail install (we just want to verify the ID)
+            raise ExtensionError("Mock download - checking ID was resolved")
+
+        mock_catalog.download_extension.side_effect = mock_download
+
+        with patch("specify_cli.extensions.ExtensionCatalog", return_value=mock_catalog), \
+             patch.object(Path, "cwd", return_value=project_dir):
+            result = runner.invoke(
+                app,
+                ["extension", "add", "Jira Integration"],
+                catch_exceptions=True,
+            )
+
+        assert result.exit_code != 0, (
+            f"Expected non-zero exit code since mock download raises, got {result.exit_code}"
+        )
+
+        # Verify download_extension was called with the resolved ID, not the display name
+        assert len(download_called_with) == 1
+        assert download_called_with[0] == "acme-jira-integration", (
+            f"Expected download_extension to be called with resolved ID 'acme-jira-integration', "
+            f"but was called with '{download_called_with[0]}'"
+        )
+
+
+class TestExtensionUpdateCLI:
+    """CLI integration tests for extension update command."""
+
+    @staticmethod
+    def _create_extension_source(base_dir: Path, version: str, include_config: bool = False) -> Path:
+        """Create a minimal extension source directory for install tests."""
+        import yaml
+
+        ext_dir = base_dir / f"test-ext-{version}"
+        ext_dir.mkdir(parents=True, exist_ok=True)
+
+        manifest = {
+            "schema_version": "1.0",
+            "extension": {
+                "id": "test-ext",
+                "name": "Test Extension",
+                "version": version,
+                "description": "A test extension",
+            },
+            "requires": {"speckit_version": ">=0.1.0"},
+            "provides": {
+                "commands": [
+                    {
+                        "name": "speckit.test.hello",
+                        "file": "commands/hello.md",
+                        "description": "Test command",
+                    }
+                ]
+            },
+            "hooks": {
+                "after_tasks": {
+                    "command": "speckit.test.hello",
+                    "optional": True,
+                }
+            },
+        }
+
+        (ext_dir / "extension.yml").write_text(yaml.dump(manifest, sort_keys=False))
+        commands_dir = ext_dir / "commands"
+        commands_dir.mkdir(exist_ok=True)
+        (commands_dir / "hello.md").write_text("---\ndescription: Test\n---\n\n$ARGUMENTS\n")
+        if include_config:
+            (ext_dir / "linear-config.yml").write_text("custom: true\nvalue: original\n")
+        return ext_dir
+
+    @staticmethod
+    def _create_catalog_zip(zip_path: Path, version: str):
+        """Create a minimal ZIP that passes extension_update ID validation."""
+        import zipfile
+        import yaml
+
+        manifest = {
+            "schema_version": "1.0",
+            "extension": {
+                "id": "test-ext",
+                "name": "Test Extension",
+                "version": version,
+                "description": "A test extension",
+            },
+            "requires": {"speckit_version": ">=0.1.0"},
+            "provides": {"commands": [{"name": "speckit.test.hello", "file": "commands/hello.md"}]},
+        }
+
+        with zipfile.ZipFile(zip_path, "w") as zf:
+            zf.writestr("extension.yml", yaml.dump(manifest, sort_keys=False))
+
+    def test_update_success_preserves_installed_at(self, tmp_path):
+        """Successful update should keep original installed_at and apply new version."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+
+        runner = CliRunner()
+        project_dir = tmp_path / "project"
+        project_dir.mkdir()
+        (project_dir / ".specify").mkdir()
+        (project_dir / ".claude" / "commands").mkdir(parents=True)
+
+        manager = ExtensionManager(project_dir)
+        v1_dir = self._create_extension_source(tmp_path, "1.0.0", include_config=True)
+        manager.install_from_directory(v1_dir, "0.1.0")
+        original_installed_at = manager.registry.get("test-ext")["installed_at"]
+        original_config_content = (
+            project_dir / ".specify" / "extensions" / "test-ext" / "linear-config.yml"
+        ).read_text()
+
+        zip_path = tmp_path / "test-ext-update.zip"
+        self._create_catalog_zip(zip_path, "2.0.0")
+        v2_dir = self._create_extension_source(tmp_path, "2.0.0")
+
+        def fake_install_from_zip(self_obj, _zip_path, speckit_version):
+            return self_obj.install_from_directory(v2_dir, speckit_version)
+
+        with patch.object(Path, "cwd", return_value=project_dir), \
+             patch.object(ExtensionCatalog, "get_extension_info", return_value={
+                 "id": "test-ext",
+                 "name": "Test Extension",
+                 "version": "2.0.0",
+                 "_install_allowed": True,
+             }), \
+             patch.object(ExtensionCatalog, "download_extension", return_value=zip_path), \
+             patch.object(ExtensionManager, "install_from_zip", fake_install_from_zip):
+            result = runner.invoke(app, ["extension", "update", "test-ext"], input="y\n", catch_exceptions=True)
+
+        assert result.exit_code == 0, result.output
+
+        updated = ExtensionManager(project_dir).registry.get("test-ext")
+        assert updated["version"] == "2.0.0"
+        assert updated["installed_at"] == original_installed_at
+        restored_config_content = (
+            project_dir / ".specify" / "extensions" / "test-ext" / "linear-config.yml"
+        ).read_text()
+        assert restored_config_content == original_config_content
+
+    def test_update_failure_rolls_back_registry_hooks_and_commands(self, tmp_path):
+        """Failed update should restore original registry, hooks, and command files."""
+        from typer.testing import CliRunner
+        from unittest.mock import patch
+        from specify_cli import app
+        import yaml
+
+        runner = CliRunner()
+        project_dir = tmp_path / "project"
+        project_dir.mkdir()
+        (project_dir / ".specify").mkdir()
+        (project_dir / ".claude" / "commands").mkdir(parents=True)
+
+        manager = ExtensionManager(project_dir)
+        v1_dir = self._create_extension_source(tmp_path, "1.0.0")
+        manager.install_from_directory(v1_dir, "0.1.0")
+
+        backup_registry_entry = manager.registry.get("test-ext")
+        hooks_before = yaml.safe_load((project_dir / ".specify" / "extensions.yml").read_text())
+
+        registered_commands = backup_registry_entry.get("registered_commands", {})
+        command_files = []
+        registrar = CommandRegistrar()
+        for agent_name, cmd_names in registered_commands.items():
+            if agent_name not in registrar.AGENT_CONFIGS:
+                continue
+            agent_cfg = registrar.AGENT_CONFIGS[agent_name]
+            commands_dir = project_dir / agent_cfg["dir"]
+            for cmd_name in cmd_names:
+                cmd_path = commands_dir / f"{cmd_name}{agent_cfg['extension']}"
+                command_files.append(cmd_path)
+
+        assert command_files, "Expected at least one registered command file"
+        for cmd_file in command_files:
+            assert cmd_file.exists(), f"Expected command file to exist before update: {cmd_file}"
+
+        zip_path = tmp_path / "test-ext-update.zip"
+        self._create_catalog_zip(zip_path, "2.0.0")
+
+        with patch.object(Path, "cwd", return_value=project_dir), \
+             patch.object(ExtensionCatalog, "get_extension_info", return_value={
+                 "id": "test-ext",
+                 "name": "Test Extension",
+                 "version": "2.0.0",
+                 "_install_allowed": True,
+             }), \
+             patch.object(ExtensionCatalog, "download_extension", return_value=zip_path), \
+             patch.object(ExtensionManager, "install_from_zip", side_effect=RuntimeError("install failed")):
+            result = runner.invoke(app, ["extension", "update", "test-ext"], input="y\n", catch_exceptions=True)
+
+        assert result.exit_code == 1, result.output
+
+        restored_entry = ExtensionManager(project_dir).registry.get("test-ext")
+        assert restored_entry == backup_registry_entry
+
+        hooks_after = yaml.safe_load((project_dir / ".specify" / "extensions.yml").read_text())
+        assert hooks_after == hooks_before
+
+        for cmd_file in command_files:
+            assert cmd_file.exists(), f"Expected command file to be restored after rollback: {cmd_file}"
--- a/tests/test_presets.py
+++ b/tests/test_presets.py