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/repo-boundary.md

@@ -1,11 +1,8 @@
 ## Repo boundary
 
-This repo owns **coulomb-loop engagement operations** only. It does not own:
+This repo owns **coulomb-loop** only. It does not own:
 
-- Kaizen agent definitions → `kaizen-agentic`
-- activity-core resolvers and Temporal workers → `activity-core`
-- State-hub API/MCP → `state-hub` / `the-custodian`
-- reuse-surface CLI and federation hub → `reuse-surface`
-- Target repo `.kaizen/` state → each fleet repo checkout
-
-Cross-repo handoffs are documented in loop workplans and `docs/adr/ADR-002-customer-supplier-boundary.md`.
+<!-- TODO: List what belongs in adjacent repos, e.g.:
+- SSH key management → railiance-infra/
+- State hub code     → state-hub/
+-->