feat: Add Kiro Power support with POWER.md generation and manifest sync

[antonbabenko]

Description

Plugin(s) affected: Infrastructure / CI tooling (all plugins)

Type of change:

• New plugin
• New content (best practices, patterns, guidance)
• Fix (correcting outdated or incorrect information)
• Refactor (reorganizing or improving clarity)
• Documentation (README, CONTRIBUTING, CLAUDE.md)
• CI / tooling

Summary:

This PR adds Kiro Power support to the agent-plugins marketplace, enabling inline plugins to be installed as Kiro Powers alongside their Claude Code and Codex/agents availability.

Key Changes

1. New build_power.py script (.github/scripts/build_power.py):

   • Generates POWER.md from SKILL.md as a CI-owned artifact (like .codex-plugin/plugin.json)
   • Extracts frontmatter (name, description, author, version) from SKILL.md
   • Reuses displayName and keywords from .codex-plugin/plugin.json
   • Rewrites relative links in references to resolve from plugin root
   • Optionally appends MCP Tools trailer if mcp.json exists
   • Supports --check mode for CI validation
   • Pure stdlib (no PyYAML); deterministic and idempotent

2. New .kiro/plugins/marketplace.json:

   • Mirrors .agents/plugins/marketplace.json for external plugins (pin-sync parity)
   • Includes local entry for code-intelligence with source: { source: local, path: ./plugins/code-intelligence }
   • Ensures three-way manifest consistency (Claude, Codex/agents, Kiro)

3. Generated plugins/code-intelligence/POWER.md:

   • Example output showing the shape: frontmatter + banner comment + rewritten body + optional MCP trailer
   • Never hand-edited; regenerated by release pipeline

4. CI validation enhancements (validate.yml):

   • New "Validate inline POWER.md (Kiro) sync" job: runs build_power.py --check on all POWER.md files
   • Verifies frontmatter completeness (name, displayName, description, keywords, author, version)
   • Validates keywords is a non-empty list
   • Extended manifest sync check to include .kiro/plugins/marketplace.json alongside Claude and agents
   • Updated link checker to skip POWER.md files (generated content)
   • Updated trigger paths to include .kiro/plugins/** and .github/scripts/**

5. External plugin update pipeline (update_external_plugins.py, update-external-plugins.yml):

   • Extended to sync .kiro/plugins/marketplace.json alongside .claude-plugin and .agents
   • Validates all three manifests stay in sync (repo URL and ref)
   • Regenerates POWER.md for inline plugins during release

6. Release pipeline (automated-release.yml):

   • Added step to regenerate POWER.md from updated SKILL.md during inline plugin releases
   • Ensures version bumps are reflected in all artifacts

7. Documentation updates (CLAUDE.md, CONTRIBUTING.md, README.md):

   • Documented .kiro/plugins/marketplace.json and its role (mirror for drift guard, not consumed for install today)
   • Added Kiro Power installation instructions to README
   • Clarified that POWER.md is generated, CI-owned, never hand-edited
   • Updated contributing guidelines for adding inline plugins (step 6: optional Kiro Power generation)
   • Explained the three-manifest sync requirement for external plugins

Design Rationale

• Single source of truth: SKILL.md is the canonical source; POWER.md is derived (like plugin.json)
• Manifest parity: Three manifests (Claude, Codex/agents, Kiro) stay in sync via CI validation and the update workflow
• Kiro install model: Kiro installs

https://claude.ai/code/session_01R8XutkcqBDWDCEWMJJ8w2f