activity-core/CLAUDE.md

# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project Overview

`activity-core` is the backbone service for a robust, event-driven "task factory" architecture. The core concept: an `ActivityDefinition` (stored in Postgres) defines a trigger (time-based or event-driven), a context resolver, and task templates. When triggered, a durable workflow evaluates the current context and spawns 0..N `TaskInstance`s.

**Technology choices (from planning docs in `wiki/`):**
- **Temporal** (self-hosted) as the orchestration engine — replaces Celery/APScheduler/cron
- **PostgreSQL** for app data (ActivityDefinitions, run logs, task instances) and Temporal persistence
- **Python SDK** (primary) for Temporal workflows and activities

**Domain model:**
- `ActivityDefinition` — versioned record with trigger config (cron/event), context sources, task templates
- `TriggerEvent` — time-based (Temporal Schedule) or external event (broker → Event Router → `client.start_workflow`)
- `RunActivityWorkflow` — durable Temporal workflow: load definition → resolve context → evaluate rules → spawn tasks → log run
- `TaskInstance` — child workflow or activity; human-facing tasks persisted to DB

**Planned directory structure (not yet scaffolded):**
```
workplans/          # ADR-001: workplan .md files (created before hub registration)
contrib/            # upstream contribution artifacts (bug-reports/, feature-requests/, extension-points/, upstream-prs/)
workflows.py        # Temporal workflow definitions
activities.py       # Temporal activity implementations
```

---

## Custodian State Hub Integration

This project is tracked as the **custodian** domain in the Custodian State Hub.
Hub topic ID: `cee7bedf-2b48-46ef-8601-006474f2ad7a`

The State Hub runs locally at http://127.0.0.1:8000. The MCP server (`state-hub`)
exposes tools for reading and writing state without touching the API directly.

### Session Protocol

**On receiving your first message — before writing any response text — execute
this orientation sequence. Do not greet, do not ask what to do first.**

**Step 1 — Call the State Hub**
```
get_domain_summary("custodian")   # workstreams, blocking decisions, recent progress, SBOM status
```
If the call fails, the API is offline: `cd ~/the-custodian/state-hub && make api`

**Step 2 — Scan local workplans**

Read every `.md` file under `workplans/`. For each file with `status: active`, extract and note:
- The workplan title and ID
- All tasks whose `status` is `todo` or `in_progress`

**Step 3 — Present orientation to the user**

Output a concise brief covering:
1. **Active workstreams** (from state hub) for the `custodian` domain — title, task counts, any blocking decisions
2. **Pending tasks for this repo** — from local `workplans/` files plus any state hub tasks with `[repo:activity-core]` in their title
3. **Suggested next action** — the highest-priority open item across both sources
4. **SBOM status** — is `last_sbom_at` set for this repo? If not, note it as a gap

If there are no workstreams at all: follow the First Session Protocol below.

**During work:**
- Use `record_decision()` for any decision that affects direction or dependencies.
- Use `add_progress_event()` for notable events (milestones, blockers, insights).
- Use `resolve_decision()` to close a decision once the choice is made.

> **Design boundary:** The State Hub is a *read model*. Two write operations are
> permanently sanctioned: **Resolving Decisions** and **Suggesting Next Steps**.
> The bootstrap tools (`create_workstream`, `create_task`, `update_task_status`)
> are only for First Session Protocol. Formal work structure — workplans, tasks —
> belongs in the domain repo as files (ADR-001), not managed through the hub alone.

**At the end of every session:**
- Call `add_progress_event()` with a summary of what was accomplished or decided.
  Include `topic_id: cee7bedf-2b48-46ef-8601-006474f2ad7a` and the relevant `workstream_id`.

---

### Repo Boundary Rule

This agent is responsible for files **in this repo only**.

- **Do not** write files or make commits in any other repository
- When you identify work for another registered repo (**ecosystem todo**): create a state hub task with `[repo:<slug>]` in the title
- When you identify work for an upstream repo (**third-party todo**): create a contribution artifact in `contrib/` and register it

---

### First Session Protocol

Triggered when `get_state_summary()` shows **no workstreams** for the `custodian` topic.

**Step 1 — Understand the project (read, don't write)**
- `~/the-custodian/canon/projects/custodian/project_charter_v0.1.md` — purpose, scope
- `~/the-custodian/canon/projects/custodian/roadmap_v0.1.md` — planned phases
- `wiki/` — proto-plans from ChatGPT and Grok (architecture reference, not yet compiled into a workplan)

**Step 2 — Survey in-progress work** — look for TODOs, open branches, half-finished files.

**Step 3 — Propose workstreams to Bernd.** Wait for approval before creating.

**Step 4 — Create workplan file first, then DB record (ADR-001):**
```
workplans/<DOMAIN>-WP-NNNN-<slug>.md   ← write this first
```
Then register in the hub:
```
create_workstream(topic_id="cee7bedf-2b48-46ef-8601-006474f2ad7a", title="...", owner="...", description="...")
create_task(workstream_id="<id>", title="...", priority="high|medium|low")
```

**Step 5 — Record the setup:**
```
add_progress_event(summary="First session: ...", event_type="milestone",
    topic_id="cee7bedf-2b48-46ef-8601-006474f2ad7a", detail={...})
```

---

### Workplan Convention (ADR-001)

Work items MUST originate as files in this repo before being registered in the hub.

**File location:** `workplans/<ID>-<slug>.md`
**Frontmatter required:** `id`, `type: workplan`, `domain`, `repo`, `status`,
`state_hub_workstream_id`, `state_hub_task_id` (per task)

---

### Contribution Tracking

Track upstream contributions in `contrib/`:
```
contrib/
  bug-reports/       # br-YYYY-MM-DD--org--repo--slug.md
  feature-requests/  # fr-YYYY-MM-DD--org--repo--slug.md
  extension-points/  # EP-custodian-NNN--org--repo--slug.md
  upstream-prs/      # upr-YYYY-MM-DD--org--repo--slug.md
```
Templates: `~/the-custodian/canon/standards/contrib-templates/`

```
register_contribution(type="br|fr|ep|upr", title="...", target_org="...",
    target_repo="...", body_path="contrib/...", related_workstream_id="<uuid>")
```

---

### SBOM

After updating dependencies:
```bash
cd ~/the-custodian/state-hub
make ingest-sbom REPO=activity-core SCAN=1 REPO_PATH=$(pwd)
```

---

### Quick Reference

`~/the-custodian/state-hub/mcp_server/TOOLS.md` — compact MCP tool reference