[codex] Add runtime lifecycle recovery and live issue visibility (#4419)

doc/SPEC-implementation.md

@@ -37,7 +37,7 @@ These decisions close open questions from `SPEC.md` for V1.
 | Visibility | Full visibility to board and all agents in same company |
 | Communication | Tasks + comments only (no separate chat system) |
 | Task ownership | Single assignee; atomic checkout required for `in_progress` transition |
-| Recovery | No automatic reassignment; work recovery stays manual/explicit |
+| Recovery | No automatic reassignment; control-plane recovery may retry lost execution continuity once, then uses explicit recovery issues or human escalation |
 | Agent adapters | Built-in `process` and `http` adapters |
 | Auth | Mode-dependent human auth (`local_trusted` implicit board in current code; authenticated mode uses sessions), API keys for agents |
 | Budget period | Monthly UTC calendar window |
@@ -395,7 +395,7 @@ Side effects:
 - entering `done` sets `completed_at`
 - entering `cancelled` sets `cancelled_at`
 
-Detailed ownership, execution, blocker, and crash-recovery semantics are documented in `doc/execution-semantics.md`.
+Detailed ownership, execution, blocker, active-run watchdog, and crash-recovery semantics are documented in `doc/execution-semantics.md`.
 
 ## 8.3 Approval Status