rdar

rdar installs the radar command, a fast local repository router written in Rust. This small, auditable launcher downloads a stripped GitHub release, verifies its SHA-256 checksum, caches it per native version and platform, then forwards arguments.

Launcher release 0.5.5 installs pinned radar 0.5.3 artifacts for the native targets that are published and checksummed on GitHub:

Apple Silicon is the macos-aarch64 target. Windows ARM64 is windows-aarch64.

cargo install --locked rdar
radar --version
cd your-project
radar map
radar query "where is the auth boundary?" --source

Measured results

• Live navigation input: 15,407 to 4,249 tokens, 72.4% lower.
• Live reference cost: $0.1555 to $0.0564, 63.7% lower.
• Accuracy: 20/21 to 21/21 in the locked live navigation matrix.
• Retrieval: expected source anchor in the top three for 40/40 questions.
• Generated 10,000-file query: 28.74 ms p95 with zero model calls.

Radar combines deterministic tree-sitter extraction, compact lexical fingerprints, exact-symbol routing, confidence-based abstention, bounded source-span verification, incremental content-addressed caches, and tiny committed MAP.md routers. Maps and caches are derived navigation data; source files remain authoritative.

Methods and installable release artifacts are published at radar.sanixdk.xyz and GitHub Releases.