v0.5.0

What's Changed

• Pin §5 one-task-at-a-time: refuse a second claim while one is held by @rafael-adcp in #101
• docs: agent-agnostic framing + Copilot CLI install by @rafael-adcp in #100
• Pin §8 L229: conformance test that delivered commits carry the attribution trailers by @rafael-adcp in #102
• feat: vendor kraken.py as init asset; thin coordination workflows by @rafael-adcp in #103
• test: port the conformance gh stub from bash to Python (#38) by @rafael-adcp in #104
• feat: consolidate cleanup-closed logic into kraken.py (#39) by @rafael-adcp in #105
• test: run all tests (now all-Python) in make check and CI by @rafael-adcp in #106
• docs(coverage): refresh stale clause line refs; finalize zero open gaps (#42) by @rafael-adcp in #107
• test: replace tests/run.py with native python3 -m unittest (#43) by @rafael-adcp in #108
• revert: keep kraken-loop.sh Copilot-only; harness-agnostic note in PROTOCOL.md (#44) by @rafael-adcp in #109
• feat(protocol): implement kraken-protocol/4 — atomic claim via git-ref CAS by @rafael-adcp in #111
• refactor(unleash): trim verbose comments in kraken.py by @rafael-adcp in #112
• feat(unleash): add note subcommand for free-form worker comments by @rafael-adcp in #113
• chore(release): v0.5.0 by @github-actions[bot] in #114

Full Changelog: v0.4.0...v0.5.0