# Worker Implementation Prep — PREP-POLICY-ENGINE-33-101-WORKER-IMPLEMENTATI

Status: Draft (2025-11-20)
Owners: Policy Guild
Scope: Define worker execution contract that consumes orchestrator jobs (32-101).

## Dependencies
- Job schema from 32-101.
- Overlay + batch context schemas (30-001, 31-002).

## Draft execution contract
- Worker input: job document with `context_id`, `batch_items`, `policy_profile_hash`, `callbacks`.
- Output record: `{job_id, worker_id, started_at, completed_at, results[]}` where each result mirrors change-event format `{component_purl, advisory_id, status, trace_ref}`.
- Idempotency: result hash over sorted results; retries compare hash and skip duplicate emission.
- Metrics: `policy_worker_jobs_total{result}`, `policy_worker_duration_seconds` (histogram), `policy_worker_results_total{status}`.

## Acceptance
- Save schema draft at `docs/modules/policy/schemas/policy-worker-result@draft.json` and sample result at `docs/modules/policy/samples/policy-worker-result@draft.json`.
- Confirm dedupe strategy with Scheduler/Orchestrator.

## Handoff
Prep artefact for PREP-POLICY-ENGINE-33-101-WORKER-IMPLEMENTATI. Finalize once job schema is fixed and dedupe/metric names are agreed.