Refresh agent instruction templates

scripts/project_rules/session-protocol.template

@@ -8,19 +8,32 @@ Read the offline-safe brief first — it works without a live hub connection:
 ```bash
 cat .custodian-brief.md
 ```
-Then call the MCP tool for richer cross-domain context (skip if unreachable):
+Then call the MCP tool for richer cross-domain context when MCP tools are exposed:
 ```
 get_domain_summary("{DOMAIN}")
 ```
+If MCP tools are unavailable in the current agent session, use the REST API:
+```bash
+curl -s "http://127.0.0.1:8000/state/summary" | python3 -m json.tool
+```
 If the hub is offline: `cd ~/state-hub && make api`
 
 **Step 2 — Check inbox**
+With MCP tools:
 ```
 get_messages(to_agent="{REPO_SLUG}", unread_only=True)
 ```
 Mark read with `mark_message_read(message_id)`. Reply or act on coordination
 requests before proceeding.
 
+Without MCP tools:
+```bash
+curl -s "http://127.0.0.1:8000/messages/?to_agent={REPO_SLUG}&unread_only=true" \
+  | python3 -m json.tool
+curl -s -X PATCH "http://127.0.0.1:8000/messages/<id>/read" \
+  -H "Content-Type: application/json" -d '{}'
+```
+
 **Step 3 — Scan workplans**
 ```bash
 ls workplans/
@@ -46,9 +59,16 @@ If no workstreams: follow First Session Protocol (`first-session.md`).
 > are First Session Protocol only. Work structure belongs in repo files (ADR-001).
 
 **Session close:**
+With MCP tools:
 ```
 add_progress_event(summary="...", topic_id="{TOPIC_ID}", workstream_id="<uuid>")
 ```
+Without MCP tools:
+```bash
+curl -s -X POST http://127.0.0.1:8000/progress/ \
+  -H "Content-Type: application/json" \
+  -d '{"topic_id":"{TOPIC_ID}","workstream_id":"<uuid>","event_type":"note","summary":"what changed","author":"codex"}'
+```
 If workplan files were modified, ensure the local copy is up to date first:
 ```bash
 git -C <repo_path> pull --ff-only