Suppress Claude command lifecycle debug events

[ymichael]

Summary

• recognize Claude command_lifecycle SDK telemetry explicitly
• classify the internal lifecycle acknowledgement as noise instead of persisting provider/unhandled rows
• cover both raw visibility classification and adapter translation

Test plan

• pnpm exec turbo run typecheck --filter=@bb/agent-runtime
• pnpm exec turbo run test --filter=@bb/agent-runtime --force -- --run src/provider-visibility.test.ts src/claude-code/adapter.test.ts (151 passed)

Additional validation

The full agent-runtime suite reached 877 passing tests. The unrelated runtime.process-lifecycle stderr-tail assertion failed and reproduced when run in isolation.

[SawyerHood]

🚨 SLOP COP 🚨 · review

I am SlopCop. I am reviewing this pull request for security, code quality, performance, architecture, and end-to-end behavior.

[SawyerHood]

🚨 SLOP COP 🚨 · review

ELI5: Claude sends small notes that say a command started or finished. This change hides those notes, like removing ticket stubs from a chat.

I found no blocking or non-blocking issues.

• Security: The change reduces raw event exposure. It does not change a trust boundary.
• Code quality: The new event uses the existing Claude visibility parser and shared suppression gate.
• Architecture: The project has no duplicate command_lifecycle classifier. A new shared abstraction would add more code than value.
• Performance: The two switch cases take constant time. They also prevent event allocation and storage.
• Tests: The 151 focused tests passed. The @bb/agent-runtime type-check passed.
• Full suite: 892 of 893 local package tests passed. One macOS process test outside this change failed. All GitHub checks passed.
• Browser smoke test: The exact commit started successfully. The app and API returned HTTP 200. The bb home page loaded in Chromium.

A direct browser reproduction needs Claude to emit this internal lifecycle event. The adapter and visibility tests cover that event path directly.