AI analysis grounded in the code graph — computed facts, not vibes · 2026-09-08T03:03:19Z
Tailcat is a Go tool and library that establishes peer-to-peer connections over Tailscale's DERP relay/data plane, without requiring Tailscale's coordination server or a full tailscaled control-plane connection. It exposes both a CLI (cmd/tailcat) styled after netcat, and a Go library (NewClient, Client, Server in tailcat.go) for embedding in other programs, plus a browser-based demo (web/app.js, webdemo.go) that runs entirely client-side via wasm.
The star jump isn't explained by a tagged release (none listed) but coincides with a burst of README and packaging work in the last 30 days: a Nix flake, a GoReleaser-based tagged-release process, container images published to ghcr.io, and a public web demo hosted on GitHub Pages. These are the kinds of changes that make a tool easy to discover and try (install via Nix, Docker, or a browser demo) rather than evidence of a specific new capability — so the growth looks more attributable to distribution/visibility improvements than to a single feature announcement.
What changed recently, how it's actually built (from the code graph), and whether you should care. Free account — no card, no spam.