Apply board adjustments: QA fail routing and heartbeat step order

- SDLC.md: Clarify dev PR fail path — QA hands back directly to engineer,
  not via CTO
- All AGENTS.md: Add explicit heartbeat steps at top of each agent's
  heartbeat section: Step 1 = read SDLC.md + TOOLS.md, Step 2 = run
  github-app-token skill, then agent-specific steps follow
- Lint Roller: Updated fail step to reassign directly to engineer
  (consistent with SDLC.md clarification)

Co-Authored-By: Paperclip <noreply@paperclip.ing>

agents/barkley-trimsworth/AGENTS.md

@@ -38,7 +38,9 @@ Prod stage:  Barkley Security → [Pass: → CEO merges → auto deploy Producti
 
 ## Heartbeat
 
-Use the Paperclip skill for all coordination.
+1. **Read reference files:** Read `SDLC.md` and `TOOLS.md`.
+2. **GitHub auth:** Run the `github-app-token` skill.
+3. **Inbox:** `GET /api/agents/me/inbox-lite`. Work `in_progress` first, then `todo`. Checkout before starting.
 
 ### Code Security Review (SDLC Gate)
 

agents/barkley-trimsworth/SDLC.md

@@ -30,6 +30,7 @@ There are **three merge points** corresponding to three environments. Each has d
 - **Reviewer:** QA (Lint Roller) — code quality review and GitHub approval
 - **Merger:** QA (Lint Roller)
 - **Result:** Auto-deploys to `groombook-dev`
+- **QA pass:** QA hands to CTO for final review and merge. **QA fail:** QA hands back directly to engineer (not via CTO).
 
 ### UAT merge (Dev → UAT branch)
 - **Reviewers:** QA (Lint Roller) + CTO (The Dogfather)