Run the gate straight from npx

v0.5.0 — run the gate straight from npx

v0.5.0 adds an npm package wrapper so you can run the proof-of-done gate
without cloning the repo — handy in a CI step or an npm script.

What's new

• npm / npx — agent-done-or-not on npm:

  npx agent-done-or-not capture --label test -- npm test
  npx agent-done-or-not assert --label test --ttl 3600

  A zero-dependency Node shim (bin/agent-done-or-not.js) forwards every
  argument to the bundled done-gate.sh, preserves the caller's working
  directory (so .agent-proof/ lands in your repo), and exits with the
  underlying command's own code. Requires bash on PATH — Git Bash on Windows.
  The published tarball bundles only the engine, the scripts, the schema, and
  the drop-in rules (10 files).

Notes

• 49-test suite, green on Ubuntu + macOS (plus the action self-test); the npm
  shim is covered end-to-end (capture writes a receipt in cwd; assert
  propagates pass/fail exit codes).
• Thin wrapper — the canonical bash core is unchanged.

Full changelog: see CHANGELOG.md.