---
id: custodian-WP-0002
type: workplan
domain: custodian
repo: activity-core
status: active
state_hub_workstream_id: 3a4f47d9-8bc1-434e-acb4-bed5d4dacda0
tasks:
  - id: T22
    title: Write schedule_manager.py
    status: todo
    state_hub_task_id: e50550d1-9904-41d7-afd8-492a1f1e91b8
  - id: T23
    title: Bootstrap script to sync schedules on startup
    status: todo
    state_hub_task_id: 5a1f7fa3-acb9-4f60-9892-c9eaa120272e
  - id: T24
    title: Handle misfire policy in schedule config
    status: todo
    state_hub_task_id: 00231668-95c5-447f-b3d0-1fb8c20b487f
  - id: T25
    title: Test schedule pause/resume lifecycle
    status: todo
    state_hub_task_id: 7abfd375-ea9d-4209-8371-e5664dc2c6c4
  - id: T26
    title: Implement Event Router service
    status: todo
    state_hub_task_id: 68b6610b-159c-4f1c-92a9-7128efea0961
  - id: T27
    title: Implement routing rules (event.type + filters → activity_ids)
    status: todo
    state_hub_task_id: 9348efea-a7e9-4f92-b866-8fc82cf28fee
  - id: T28
    title: Start/signal workflow from Event Router
    status: todo
    state_hub_task_id: cac1f45a-7391-471a-9566-97cdbd96eb2d
  - id: T29
    title: Integration test — publish event → observe workflow run
    status: todo
    state_hub_task_id: 7f10b5a3-7cad-4914-b603-d57508c85629
  - id: T30
    title: REST API (FastAPI) — CRUD for ActivityDefinition
    status: todo
    state_hub_task_id: b27e54a1-5dcc-476d-8f4a-c995aea6a8c2
  - id: T31
    title: Wire Temporal SDK metrics to Prometheus
    status: todo
    state_hub_task_id: 0eafb60c-f00e-4fd7-a921-7de75fcfe81e
  - id: T32
    title: Tag workflows with activity_id for Temporal visibility search
    status: todo
    state_hub_task_id: 7bdfc5c2-1f06-4fce-aac3-fae036dcb47e
  - id: T33
    title: Write operational runbook
    status: todo
    state_hub_task_id: 766d602d-1b23-4247-a46d-03c0d3b8e498
---

# activity-core Triggers & Ops

**Workstream:** activity-core Triggers & Ops
**Hub ID:** `3a4f47d9-8bc1-434e-acb4-bed5d4dacda0`
**Depends on:** custodian-WP-0001 (Foundation — Temporal Backbone)

## Purpose

Add automated triggering (time-based via Temporal Schedules and event-driven via Event Router),
a REST admin API, Prometheus metrics, and an operational runbook. Transforms the manually-triggered
backbone from WP-0001 into a self-operating service.

## Open decisions (resolve before Phase 5)

- **Event broker choice** (hub: `bc47c9c2-5643-4a88-8114-601738a2f64e`): Kafka vs NATS vs RabbitMQ.
  T26–T29 are blocked until this is resolved.

---

## Phase 4 — Time-Based Triggers (Temporal Schedules)

| Task | Priority | Hub task ID |
|---|---|---|
| T22: Write schedule_manager.py | medium | `e50550d1-9904-41d7-afd8-492a1f1e91b8` |
| T23: Bootstrap script to sync schedules on startup | medium | `5a1f7fa3-acb9-4f60-9892-c9eaa120272e` |
| T24: Handle misfire policy in schedule config | medium | `00231668-95c5-447f-b3d0-1fb8c20b487f` |
| T25: Test schedule pause/resume lifecycle | medium | `7abfd375-ea9d-4209-8371-e5664dc2c6c4` |

---

## Phase 5 — Event-Driven Triggers

*Blocked by broker decision (`bc47c9c2-5643-4a88-8114-601738a2f64e`).*

| Task | Priority | Hub task ID |
|---|---|---|
| T26: Implement Event Router service | medium | `68b6610b-159c-4f1c-92a9-7128efea0961` |
| T27: Implement routing rules (event.type + filters → activity_ids) | medium | `9348efea-a7e9-4f92-b866-8fc82cf28fee` |
| T28: Start/signal workflow from Event Router | medium | `cac1f45a-7391-471a-9566-97cdbd96eb2d` |
| T29: Integration test — publish event → observe workflow run | medium | `7f10b5a3-7cad-4914-b603-d57508c85629` |

---

## Phase 6 — Observability & Admin

| Task | Priority | Hub task ID |
|---|---|---|
| T30: REST API (FastAPI) — CRUD for ActivityDefinition | low | `b27e54a1-5dcc-476d-8f4a-c995aea6a8c2` |
| T31: Wire Temporal SDK metrics to Prometheus | low | `0eafb60c-f00e-4fd7-a921-7de75fcfe81e` |
| T32: Tag workflows with activity_id for Temporal visibility search | low | `7bdfc5c2-1f06-4fce-aac3-fae036dcb47e` |
| T33: Write operational runbook | low | `766d602d-1b23-4247-a46d-03c0d3b8e498` |

---

## Completion criteria

Schedules fire `RunActivityWorkflow` automatically on cron cadence. An external event published
to the broker reaches the correct ActivityDefinition end-to-end. ActivityDefinitions are
manageable via REST API. Prometheus metrics are scraped. Runbook is written.