“Porque mis armas son los pinceles y mis municiones son las pinturas” — Peter de los Polvorines

espectacular

In brief: ah is a CLI that enforces a contract between your specs and your tests. You write behavioral specs in Markdown, attach a TOML contract to each scenario declaring which tests cover it, then run ah check in CI to catch drift.

espectacular is a behavioral verification tool for Rust CLI projects. It lets you write machine-readable specs that describe what your tool does, then continuously check that behavior with ah check. Each spec scenario is paired with a sidecar TOML contract that lists the tests verifying it — when a test is missing, unconfigured, or failing, ah check exits non-zero and blocks the merge.

• Installation & Quick Start — get ah on your PATH and run your first check in minutes
• Command Reference — all ah subcommands with flags, exit codes, and example output
• Concepts — understand specs, scenarios, contracts, archetypes, and the gate model