Crabbox appears to be a tool for selecting execution environments based on repository context—it recommends which "box" (likely local dev, CI provider, container, etc.) should run a given command to optimize feedback speed. The concrete claim is that you can call `crabbox providers recommend fast-feedback` and `crabbox doctor --provider <name>` to diagnose and select providers. The page itself is thin; it shows a recommended workflow ("start with providers favoring local execution") but doesn't explain what distinguishes one provider from another, how selection actually works, or what problem it solves beyond "shorten the edit–run loop." For someone evaluating this, the missing piece is: does it auto-detect your repo setup (monorepo, Docker, CI config) and propose accordingly, or do you manually curate a config file?