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 **can-you-assist** (`cya`) only. It does not own:
+This repo owns **can-you-assist** only. It does not own:
 
-- LLM provider access, API clients, or model hosting → `llm-connect`
-- Durable memory storage, profile planners, graph/event stores, or lifecycle algorithms → `phase-memory`
-- Global work tracking, decisions, or cross-repo coordination → State Hub / custodian
-- Credential custody (API keys, DB passwords, OIDC) → OpenBao / key-cape / operator paths (route via `warden route`)
-- SSH certificate issuance → `ops-warden` (`warden sign` only)
-
-`cya` integrates via stable seams (`LLMAdapter` Protocol, memory ports). State Hub is non-runtime.
+<!-- TODO: List what belongs in adjacent repos, e.g.:
+- SSH key management → railiance-infra/
+- State hub code     → state-hub/
+-->