## Session Protocol

State Hub: http://127.0.0.1:8000

**Step 1 — Orient**

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 when MCP tools are exposed:
```
get_domain_summary("railiance")
```
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="railiance-hosts", 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=railiance-hosts&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/
```
For each file with `status: ready`, `active`, or `blocked`, note pending
`todo`/`in_progress` tasks.

**Step 4 — Present brief**

1. **Active workstreams** for `railiance` — title, task counts, blocking decisions
2. **Pending tasks** from `workplans/` + any `[repo:railiance-hosts]` hub tasks
3. **Goal guidance** — if `goal_guidance` in summary:
   - `needs_workplan`: surface as top action — *"Repo goal '{title}' has no workplan yet"*
   - `alignment_warnings`: flag if active work is not aligned with current goal
4. **Suggested next action** — highest-priority open item
5. **SBOM status** — flag if `last_sbom_at` is unset for this repo

If no workstreams: follow First Session Protocol (`first-session.md`).

**During work:** `record_decision()` · `add_progress_event()` · `resolve_decision()`

> State Hub is a *read model*. Bootstrap tools (`create_workstream`, `create_task`)
> are First Session Protocol only. Work structure belongs in repo files (ADR-001).

**Session close:**
With MCP tools:
```
add_progress_event(summary="...", topic_id="ca369340-a64e-442e-98f1-a4fa7dc74a38", 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":"ca369340-a64e-442e-98f1-a4fa7dc74a38","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
cd ~/state-hub && make fix-consistency REPO=railiance-hosts
```
For repos where implementation runs on a remote machine (e.g. CoulombCore),
use the combined target which pulls before fixing:
```bash
cd ~/state-hub && make fix-consistency-remote REPO=railiance-hosts
```
**C-15** (DB task ahead of file) is normal in multi-machine workflows — writeback
will sync the file to match DB.  **C-16** (repo behind remote) blocks all writes
until you pull — intentional to prevent clobbering remote progress.