Merge upstream origin/main with local fork additions preserved

Accept upstream's ce-review pipeline rewrite (6-stage persona-based
architecture with structured JSON, confidence gating, three execution
modes). Retire 4 overlapping review agents (security-sentinel,
performance-oracle, data-migration-expert, data-integrity-guardian)
replaced by upstream equivalents. Add 5 local review agents as
conditional personas in the persona catalog (kieran-python, tiangolo-
fastapi, kieran-typescript, julik-frontend-races, architecture-
strategist).

Accept upstream skill renames (file-todos→todo-create, resolve_todo_
parallel→todo-resolve), port local Assessment and worktree constraint
additions to new files. Merge best-practices-researcher with upstream
platform-agnostic discovery + local FastAPI mappings. Remove Rails/Ruby
skills (dhh-rails-style, andrew-kane-gem-writer, dspy-ruby) per fork's
FastAPI pivot.

Component counts: 36 agents, 48 skills, 7 commands.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

plugins/compound-engineering/agents/research/best-practices-researcher.md

@@ -6,15 +6,15 @@ model: inherit
 
 <examples>
 <example>
-Context: User wants to know the best way to structure GitHub issues for their Rails project.
+Context: User wants to know the best way to structure GitHub issues for their FastAPI project.
 user: "I need to create some GitHub issues for our project. Can you research best practices for writing good issues?"
-assistant: "I'll use the best-practices-researcher agent to gather comprehensive information about GitHub issue best practices, including examples from successful projects and Rails-specific conventions."
+assistant: "I'll use the best-practices-researcher agent to gather comprehensive information about GitHub issue best practices, including examples from successful projects and FastAPI-specific conventions."
 <commentary>Since the user is asking for research on best practices, use the best-practices-researcher agent to gather external documentation and examples.</commentary>
 </example>
 <example>
 Context: User is implementing a new authentication system and wants to follow security best practices.
-user: "We're adding JWT authentication to our Rails API. What are the current best practices?"
-assistant: "Let me use the best-practices-researcher agent to research current JWT authentication best practices, security considerations, and Rails-specific implementation patterns."
+user: "We're adding JWT authentication to our FastAPI API. What are the current best practices?"
+assistant: "Let me use the best-practices-researcher agent to research current JWT authentication best practices, security considerations, and FastAPI-specific implementation patterns."
 <commentary>The user needs research on best practices for a specific technology implementation, so the best-practices-researcher agent is appropriate.</commentary>
 </example>
 </examples>
@@ -39,7 +39,7 @@ Before going online, check if curated knowledge already exists in skills:
 
 2. **Identify Relevant Skills**:
    Match the research topic to available skills. Common mappings:
-   - Rails/Ruby → `dhh-rails-style`, `andrew-kane-gem-writer`, `dspy-ruby`
+   - Python/FastAPI → `fastapi-style`, `python-package-writer`
    - Frontend/Design → `frontend-design`, `swiss-design`
    - TypeScript/React → `react-best-practices`
    - AI/Agents → `agent-native-architecture`
@@ -120,7 +120,7 @@ For GitHub issue best practices specifically, you will research:
 ## Source Attribution
 
 Always cite your sources and indicate the authority level:
-- **Skill-based**: "The dhh-rails-style skill recommends..." (highest authority - curated)
+- **Skill-based**: "The fastapi-style skill recommends..." (highest authority - curated)
 - **Official docs**: "Official GitHub documentation recommends..."
 - **Community**: "Many successful projects tend to..."