feat: shared MCP wrapper for codebase-memory-mcp with cache-hosted incremental index

[Copilot]

Adds .github/workflows/shared/mcp/codebase-memory-mcp.md — a reusable shared component wrapping codebase-memory-mcp, a zero-dependency structural code-intelligence MCP server (159-language tree-sitter + Hybrid LSP, 14 tools).

Design

• Persistent index: ~/.cache/codebase-memory-mcp is symlinked into cache-memory so the SQLite knowledge graph survives across runs
• Incremental re-indexing: index_repository auto-detects the existing store on subsequent runs and only re-indexes git-diff-changed files; full index only on first run
• Native MCP server: uses mcp-servers.command: (stdio) — same pattern as agentdb.md — started after the pre-index step completes

Allowed tools (read-oriented defaults)

index_repository, index_status, list_projects, search_graph, trace_path, detect_changes, query_graph, get_graph_schema, get_code_snippet, get_architecture, search_code, ingest_traces

delete_project and manage_adr are excluded; manage_adr can be re-enabled per-workflow.

Usage

network:
  allowed:
    - node   # npm install -g codebase-memory-mcp
imports:
  - shared/mcp/codebase-memory-mcp.md

tools.cache-memory: true is injected by the import.

[pelikhan]

disable scripts, pin version

[pelikhan]

@copilot npm disable scripts, pin version

[Copilot]

@copilot npm disable scripts, pin version

Done in 6ac76e3. Pinned to codebase-memory-mcp@0.7.0 and added --ignore-scripts. The binary-download postinstall (install.js) is now invoked explicitly in the next line so the intent is auditable.