rdar

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

By default it downloads from the public Radar website first:

• https://radar.sanixdk.xyz/downloads

If that source is unavailable, it falls back to the GitHub release:

• https://github.com/Sanix-Darker/radar/releases/download/v0.5.20

Launcher release 0.5.21 installs pinned radar 0.5.20 artifacts for the native targets that are published and checksummed on GitHub:

Apple Silicon is the macos-aarch64 target. Windows ARM64 is windows-aarch64. The 0.5.20 compressed release archives are 3.55 to 3.88 MiB; the unpacked binaries are 26.34 to 27.61 MiB. Linux musl artifacts are statically linked and stripped; macOS artifacts are Mach-O DYLDLINK binaries and are not advertised as static.

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.