Show HN: Mimir – open-source code intelligence for AI agents (Go, MCP, SQLite)

2 points

3 months ago

I built Mimir because every AI coding assistant I used was effectively doing regex search over my codebase. They had no understanding of call chains, module boundaries, or blast radius.

Mimir indexes a repo into a typed knowledge graph (nodes = symbols, edges = CALLS/IMPORTS/EXTENDS with confidence scores) and exposes it via MCP so agents can actually reason about code structure.

How it works: 1. mimir analyze . — parallel AST parse (go-tree-sitter, 8 languages), scope-aware cross-file resolution, Louvain community detection, BM25 + HNSW vector search 2. mimir daemon start — background MCP server 3. mimir setup — auto-writes config into Claude Code, VS Code, Cursor, Windsurf, Zed

  Stack: Go 1.22, modernc/sqlite (pure Go, no CGO), sqlite-vec (HNSW), Sigma.js web UI

  Benchmarks vs the Node.js predecessor:
  - Cold index 1k files: 45s → < 8s
  - Incremental re-index: 45s → < 2s
  - Binary size: 350MB → < 20MB
  - RAM during index: 800MB → < 120MB

  GitHub: github.com/thuongh2/git-mimir
  Install: go install github.com/thuongh2/git-mimir/cmd/mimir@latest

Happy to answer questions about the architecture (resolver phases, incremental patching, the MCP transport layer).