[S1] index the codegraph repo itself (TS + Rust + Svelte, ~740 files)
PASS: full self-index in 30s ( 72M db)
[S2] status on the real repo
    
    CodeGraph Status
    
    Project: /private/tmp/codegraph-review
    
    Index Statistics:
      Files:     787
      Nodes:     16,905
      Edges:     64,099
      DB Size:   72.29 MB
[S3] explore a real flow: how does the MCP server register tools
PASS: explore answered in 3s, 619 lines, head:
    **Exploration: how does the MCP server register codegraph_explore**
    
    Found 76 symbols across 4 files.
    
    **Blast radius — what depends on these (update/verify before editing)**
    
    - `serve` (src/mcp/query-worker.ts:71) — 1 caller in `src/mcp/query-worker.ts`; no tests found within 3 caller hops
    - `MCPServer` (src/mcp/index.ts:236) — 2 callers in `src/index.ts`, `src/bin/codegraph.ts`; tested via callers: `__tests__/adaptive-explore-sizing.test.ts`, `__tests__/android-res-exclusion.test.ts` +57
[S4] callers on a real hot symbol (upsertCodeGraphMcpServer)
PASS: callers finds the hermes wiring path: function writeHermesConfig
[S5] gitignore discipline: node_modules (144M) must not be in the graph
PASS: node_modules excluded from the index