Normalize agent instructions and workplan frontmatter (STATE-WP-0067)

- Align agent files with on-disk workplan prefixes (infer from workplan ids)
- Set workplan domain to registered domain_slug; add topic_slug where applicable
- Repair frontmatter delimiter formatting; migrate legacy task status literals
- Regenerate AGENTS.md, CLAUDE.md, and .claude/rules from State Hub templates

.claude/rules/first-session.md

@@ -1,11 +1,11 @@
 ## First Session Protocol
 
-Triggered when `get_domain_summary("coulomb_social")` shows **no workstreams**.
+Triggered when `get_domain_summary("communication")` shows **no workstreams**.
 The project is registered but work has not yet been structured.
 
 **Step 1 — Read, don't write**
-- `~/the-custodian/canon/projects/coulomb_social/project_charter_v0.1.md` — purpose, scope
-- `~/the-custodian/canon/projects/coulomb_social/roadmap_v0.1.md` — planned phases
+- `~/the-custodian/canon/projects/communication/project_charter_v0.1.md` — purpose, scope
+- `~/the-custodian/canon/projects/communication/roadmap_v0.1.md` — planned phases
 - Scan repo root: README, directory structure, existing code or docs
 
 **Step 2 — Survey in-progress work**
@@ -17,7 +17,7 @@ roadmap phase. **Wait for approval before creating.**
 
 **Step 4 — Create workplan file first, then DB record (ADR-001)**
 ```
-workplans/COULOMB-WP-NNNN-<slug>.md   ← write this first
+workplans/LOOP-WP-NNNN-<slug>.md   ← write this first
 ```
 Then register in the hub:
 ```
@@ -28,7 +28,7 @@ create_task(workstream_id="<id>", title="...", priority="high|medium|low")
 **Step 5 — Record the setup**
 ```
 add_progress_event(
-    summary="First session: structured coulomb_social into N workstreams, M tasks",
+    summary="First session: structured communication into N workstreams, M tasks",
     event_type="milestone",
     topic_id="36c7421b-c537-4723-bf75-42a3ebc6a1dc",
     detail={"workstreams": [...], "tasks_created": M}