DoneSpec – deterministic completion checks for AI coding agents

DoneSpec is an open-source tool that provides deterministic completion verification for AI coding agents. It uses a done.json contract to enforce that tasks are truly complete, preventing agents from falsely claiming completion. It supports various checks like file existence, command exit codes, regex patterns, and file modification detection. It can be used locally, in CI (e.g., GitHub Actions), git hooks, and agent workflows. The tool is minimal, local-first, and has no cloud or LLM dependencies.