Show HN: Gauge – Open-Source CLI to recursively improve your docs

Gauge is an open-source CLI that recursively improves documentation for coding agents by running them against a product, capturing where they get stuck, and letting the product's own coding agent test fixes before release. It uses a hillclimbing loop to analyze session transcripts, create variants of the docs to resolve issues, and re-run the tasks with the doc variants injected. The CLI supports Claude Code, Codex, Pi, and OpenCode agents, and can be used with Docker and existing agent subscriptions or API keys.