chore(agents): Add subagents for MCP and Python development

[doomspork]

Add subagents for Claude Code assistance:

• An expert in Nix
• An MCP Architect
• A Python expert

[claude]

Claude finished @doomspork's task —— View job

---

Claude Code Review

Reviewing PR #46: Adding subagents for MCP and Python development

Todo List:

• Read and analyze python-expert.md
• Read and analyze nix-expert.md
• Read and analyze mcp-server-architect.md
• Review for code quality and best practices
• Check for potential bugs or issues
• Assess security considerations
• Provide comprehensive feedback

Review Summary

This PR adds three well-structured agent configurations that enhance Claude Code's capabilities for this MCP-NixOS project. The agents are domain-specific and appropriately scoped. Overall, this is a solid addition with some minor issues to address.

✅ Strengths

1. Excellent Domain Specialization

• Each agent has a clear, focused scope (Python/async, Nix ecosystem, MCP architecture)
• Appropriate category assignments (language-specialists, specialized-domains, quality-security)
• Good alignment with the project's tech stack (FastMCP 2.x, async Python, Nix development shell)

2. Comprehensive Documentation

• Detailed process workflows and checklists for each agent
• Practical code examples that match the project's patterns
• Clear "when to use" guidance for each agent

3. Project-Specific Context

• nix-expert.md:96-112: Excellent project-specific package definition that matches this MCP server
• mcp-server-architect.md:41-47: Good emphasis on real API integrations and plain text formatting (aligns with CLAUDE.md requirements)

⚠️ Issues to Address

1. Async/Sync Inconsistency in python-expert.md

Location: python-expert.md:58 and examples

Problem: The documentation mentions httpx (async HTTP client) in dependencies but the text and some implied patterns could still reference synchronous approaches.

Impact: Could lead to blocking I/O operations in async code, degrading performance.

Recommendation:

- **pyproject.toml** with async dependencies (fastmcp>=2.11.0, httpx, beautifulsoup4)
+ **pyproject.toml** with async dependencies (fastmcp>=2.11.0, httpx, aiofiles, beautifulsoup4)

Add explicit guidance about avoiding synchronous HTTP libraries:

- **Avoid synchronous libraries** (requests, urllib) in favor of async alternatives (httpx, aiohttp)

2. Missing Context in mcp-server-architect.md

Location: mcp-server-architect.md:62

Problem: Code example references api_client without showing its definition or import.

Impact: Could confuse developers about proper async client setup patterns.

Recommendation: Add a comment or show the client initialization:

# Assuming api_client is an async HTTP client (httpx.AsyncClient, etc.)
response = await api_client.search(query)

3. Minor Documentation Enhancement

Location: nix-expert.md:104

Suggestion: The package definition uses requests in propagatedBuildInputs, but the Python expert emphasizes async-first development. Consider noting this inconsistency or updating to httpx for consistency.

🔒 Security Assessment

• ✅ No security concerns identified
• Agents focus on development best practices and don't introduce security vulnerabilities
• Emphasis on proper error handling and graceful degradation is security-positive

🚀 Performance Considerations

• ✅ Strong async focus in both python-expert and mcp-server-architect agents
• ✅ Emphasis on real API integrations without caching aligns with the project's current approach
• ✅ Memory efficiency patterns mentioned in python-expert agent

📝 Test Coverage

• ✅ Comprehensive testing guidance with pytest-asyncio patterns
• ✅ Clear separation of unit and integration tests using markers
• ✅ Real API testing emphasis matches project's testing approach

🎯 Recommendations

1. Fix the httpx dependency documentation in python-expert.md
2. Add api_client context in the mcp-server-architect example
3. Consider standardizing on async HTTP libraries across all agent documentation
4. Validate against CLAUDE.md requirements - the agents align well with the project's emphasis on async, real APIs, and plain text formatting

📋 Additional Notes

• The agents complement each other well and avoid scope overlap
• Documentation quality is high with practical, actionable guidance
• Code examples are appropriate for the MCP-NixOS context
• The PROACTIVE usage guidance helps Claude Code know when to invoke these agents automatically

This is a valuable addition that will significantly enhance Claude Code's effectiveness for this project's development workflow.

---

[Copilot]

Pull Request Overview

This pull request adds three specialized agent configurations for Claude to enhance development workflow support. The PR introduces domain-specific agents for Python development, Nix ecosystem management, and MCP server architecture.

• Adds python-expert agent specializing in async programming and FastMCP 2.x development
• Adds nix-expert agent for Nix ecosystem development including flakes and development shells
• Adds mcp-server-architect agent for designing and implementing MCP servers with protocol compliance

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
.claude/agents/python-expert.md	Python expert agent configuration with async programming focus and FastMCP 2.x patterns
.claude/agents/nix-expert.md	Nix ecosystem expert agent for development environments and configuration management
.claude/agents/mcp-server-architect.md	MCP server architect agent for protocol-compliant server implementation

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The function is declared as async but uses synchronous requests.get(). This will block the event loop. Use an async HTTP client like aiohttp or httpx instead.

[jamesbrink]

Solid work!!!