v0.2.23

Added

• [agent] terminal_marker — per-preset grace-kill result marker (default = Claude's token; pi/codewhale set their own; kimi/aider have no marker and run to the wall-clock ceiling).
• doctor — read-only pre-flight (never launches the agent): startup checks, phase-window overlap warnings, and an N-round phase-plan preview.
• phase_window_overlap event — emitted at serve boot when two agent-overriding phases' windows collide in the same timezone.

Changed

• Startup-check dispatch and the catalog's kind list now derive from a single descriptor table (no behavior change).
• The lock-holder pid create_time verify now shares one lifecycle helper with serve.pid (no behavior change).
• Default claude preset model updated claude-opus-4-7 → claude-opus-5.

Fixed

• peek no longer prints spurious "cannot coerce None" warnings on a freshly-initialized project; absent metric samples fall back to defaults silently (a genuinely malformed value still warns).