feat(opencode): add JSON-only integration and compact AGENTS.md generator (#570)

* feat: add OpenCode integration implementation plan for BMAD-METHOD

* installer(opencode): add OpenCode target metadata in install.config.yaml

* chore(deps): add comment-json for JSONC parsing in OpenCode integration

* feat(installer/opencode): implement setupOpenCode with minimal instructions merge and BMAD-managed agents/commands

* feat(installer): add OpenCode (SST) to IDE selector and CLI --ide help

* fix(opencode): align generated opencode.json(c) with schema (instructions as strings; agent.prompt; command.template; remove unsupported fields)

* feat(installer): enhance OpenCode setup with agent selection and prefix options

* fix: update configuration file references from `bmad-core/core-config.yaml` to `.bmad-core/core-config.yaml` across multiple agent and task files for consistency and clarity.

* refactor: streamline OpenCode configuration prompts and normalize instruction paths for agents and tasks

* feat: add tools property to agent definitions for enhanced functionality. Otherwise opencode consders the subagents as readonly

* feat: add extraction of 'whenToUse'  from agents markdown files for improved agent configuration in opencode

* feat: enhance task purpose extraction from markdown files with improved parsing and cleanup logic

* feat: add collision warnings for non-BMAD-managed agent and command keys during setup

* feat: generate and update AGENTS.md for OpenCode integration with agent and task details

* feat: add compact AGENTS.md generator and JSON-only integration for OpenCode

* chore(docs): remove completed OpenCode integration implementation plans

* feat: enable default prefixes for agent and command keys to avoid collisions

* fix: remove unnecessary line breaks in 'whenToUse' descriptions for QA agents to mathc the rest of the agents definitions and improve programatic parsing of whenToUse prop

* fix: update OpenCode references to remove 'SST' for consistency across documentation and configuration

* fix: update agent mode from 'subagent' to 'all' for consistency in agent definitions

* fix: consolidate 'whenToUse' description format for clarity and consistent parsing

PR-opencode-agents-generator.md

@@ -0,0 +1,40 @@
+# feat(opencode): compact AGENTS.md generator and JSON-only integration
+
+## What
+
+Add JSON-only OpenCode integration and a compact AGENTS.md generator (no large embeds; clickable file links) with idempotent merges for BMAD instructions, agents, and commands.
+
+## Why
+
+Keep OpenCode config schema‑compliant and small, avoid key collisions, and provide a readable agents/tasks index without inflating AGENTS.md.
+
+## How
+
+- Ensure `.bmad-core/core-config.yaml` in `instructions`
+- Merge only selected packages’ agents/commands into opencode.json file
+- Orchestrators `mode: primary`; all agents enable `write`, `edit`, `bash`
+- Descriptions from `whenToUse`/task `Purpose` with sanitization + fallbacks
+- Explicit warnings for non‑BMAD collisions; AGENTS.md uses a strict 3‑column table with links
+
+## Testing
+
+- Run: `npx bmad-method install -f -i opencode`
+- Verify: `opencode.json[c]` updated/created as expected, `AGENTS.md` OpenCode section is compact with links
+- Pre‑push checks:
+
+```bash
+npm run pre-release
+# or individually
+npm run validate
+npm run format:check
+npm run lint
+# if anything fails
+npm run fix
+# or
+npm run format
+npm run lint:fix
+```
+
+Fixes #<issue-number>
+
+Targets: `next` branch