Implement Context API and GitHub Integration

[prosdev]

Description

Implement a context API server and GitHub integration to provide context for AI tools and fetch metadata from GitHub repositories. This will enable seamless integration with AI tools and provide additional context from GitHub.

Acceptance Criteria

• Express server exposes endpoints for context retrieval
• GitHub CLI integration fetches issues, PRs, and other metadata
• Context assembly functions combine repository and GitHub data
• Query relevance ranking provides the most relevant context
• API responses are well-structured for AI tool consumption

Technical Requirements

• Implement Express.js for API server
• Integrate with GitHub CLI for metadata retrieval
• Create utility functions for context assembly
• Implement relevance ranking algorithm
• Define clear API documentation
• Support for pagination and rate limiting

Branch: feat/context-api
Priority: Medium
Estimate: 3 days
Parent Epic: #1

[prosdev]

Closing as superseded by MCP architecture.

What was delivered:

• MCP server replaces Express API (better AI tool integration)
• GitHub integration via dev_gh tool and GitHub indexer
• Context assembly via dev_plan context assembler
• Relevance ranking via semantic search

The original vision was achieved through a better architecture (MCP over REST).