[jlongster]

Summary

• Part 3 of the stack for Idle daemon wakes the CPU ~100 times/s (10 ms sleep in the accept loop) #25, stacked on fix(daemon): survive thread spawn failures #29. Please merge fix(daemon): block subscriptions instead of polling #28 and fix(daemon): survive thread spawn failures #29 first.
• Behaviour-preserving refactor: the 10 ms accept loop is unchanged. This PR prepares the loop to become readiness-driven in the next PR.
• New daemon::Control holds a private stop flag and the ownership mutex, and is now the only way to stop the daemon or mutate ownership.
  • request_stop takes the ownership lock, so the next PR can wake the accept loop under that same lock.
• run is split into bind → Control → serve. Ownership is still created after bind, as before.
• Handler completion is tracked with a done flag set by a drop guard in the handler thread (the reap check still also accepts is_finished()). The next PR adds a wake there.
• Ownership::with_timeouts lets tests use short starting/handoff deadlines.
• New in-process unix tests in src/daemon/server.rs, using a TestDaemon fixture that runs serve on a temp socket:
  • shutdown_request_stops_immediately
  • owner_shutdown_stops_immediately
  • owner_disconnect_without_handoff_stops_immediately
  • starting_deadline_fires_on_time
  • waiting_deadline_fires_on_time
  • handoff_claim_transfers_without_spurious_stop

Validation

• cargo fmt --check and cargo clippy --locked --all-targets --all-features -- -D warnings pass (toolchain 1.90.0).
• The macOS CI test selection passes: cargo test --locked --lib --test service --test runtime --test ownership --test rows --test ghostty-effects (lib 47, ghostty-effects 5, ownership 8, rows 1, runtime 8 + 1 ignored, service 9).
• Cross clippy with -D warnings passes for x86_64-pc-windows-msvc and x86_64-unknown-linux-gnu (--all-targets --all-features, ghostty-vt link libs stubbed). Windows and Linux tests rely on CI.

[jlongster]

This moved to the monorepo as anomalyco/opencode#59700 (merged).