agent-done-or-not

Proof-of-done enforcement gate — records fresh evidence before any agent can claim "done". Runs your verifying command (tests, build, lint, curl) through a tamper-evident gate that records the command, exit code, and SHA-256 of the output. Blocks completion on any failing, stale, or already-consumed receipt. Works with Claude Code (hard Stop-hook enforcement), Cursor, Codex, Windsurf, Cline, Roo, Zed, Goose, and any harness that supports stop/finish hooks.