Add project-heartbeat skill skeleton

skills/project-heartbeat/references/check-order.md

@@ -0,0 +1,30 @@
+# Heartbeat timeout check order
+
+When the 10-minute timer expires:
+
+1. Check worker/session traces
+   - session history
+   - recent/active subagents
+   - visible logs / evidence points
+
+2. Check task state
+   - CURRENT_STATE.md
+   - planned / dispatching / in_progress / blocked / reviewing / done
+
+3. Check known blocker buckets
+   - launch
+   - model
+   - auth
+   - tool
+   - path/repo
+   - scope
+   - policy/review
+   - external
+
+4. Produce a user-visible update
+   - who
+   - status
+   - output
+   - next
+
+Prefer precise failure language over passive waiting language.