cq27-dev/rag-rat

README preview

# rag-rat

[![CI](https://github.com/cq27-dev/rag-rat/actions/workflows/ci.yml/badge.svg)](https://github.com/cq27-dev/rag-rat/actions/workflows/ci.yml)
[![codecov](https://codecov.io/gh/cq27-dev/rag-rat/branch/main/graph/badge.svg)](https://codecov.io/gh/cq27-dev/rag-rat)
[![crates.io](https://img.shields.io/crates/v/rag-rat.svg)](https://crates.io/crates/rag-rat)
[![benchmarks](https://img.shields.io/badge/benchmarks-bencher-orange)](https://bencher.dev/perf/rag-rat/plots)
[![site](https://img.shields.io/badge/site-rag--rat.cq27.dev-2563eb)](https://rag-rat.cq27.dev)

**What a repository knows about itself.** `rag-rat` is a local repo-intelligence index and MCP server
for coding agents. It keeps source files read-only, writes only its own SQLite database, and answers
with provenance on every result — current source, the code graph, git/GitHub history, and durable,
source-anchored repo memories that persist across sessions and agents.

Explore the [live VS Code Lens demo](https://rag-rat-demo.cq27.dev/?folder=/srv/workspace&payload=%5B%5B%22gotoLineMode%22%2C%22true%22%5D%2C%5B%22openFile%22%2C%22vscode-remote%3A//rag-rat-demo.cq27.dev/srv/workspace/crates/rag-rat-oplog/src/account/content/storage.rs%3A1459%3A1%22%5D%5D) — no installation required.
It surfaces clone classes, repo memories, and issue/decision context alongside the code; press
`Ctrl+Alt+R` to reveal clone overlays.

Every coding harness already has `grep` and file reads. rag-rat adds the layer they do not provide:
source-anchored *rationale*. It connects the code an agent is about to touch to its callers, callees,
tests, git/GitHub history, prior decisions, invariants, risks, and duplicate-code signals — and

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