# Replay Delivery Coordination Prep — PREP-EVIDENCE-LOCKER-GUILD-REPLAY-DELIVERY-GU

Status: Draft (2025-11-20)
Owners: Planning · Evidence Locker Guild · Replay Delivery Guild · CLI Guild
Scope: Define minimum contract notes for replay delivery so EVID-REPLAY-187-001/002 and RUNBOOK-REPLAY-187-004 can move once schemas freeze.

## Ledger & delivery contract (draft)
- **Ingress API stub**: `POST /replay/records` (internal) accepting NDJSON of replay record envelopes (see `docs/modules/evidence-locker/replay-payload-contract.md`).
- **Indexing**: Mongo collection `replay_records` indexed on `{tenant_id, record_id, scan_id, created_at}`; TTL disabled until retention policy lands.
- **Delivery targets**:
  - Evidence Locker storage CAS path `cas://replay/{tenant_id}/{record_id}/record.ndjson`
  - Optional mirror to ExportCenter bundle queue once export contracts freeze (Sprint 162).
- **Retention knobs (placeholders)**: `max_records_per_tenant`, `max_age_days`, `max_bytes_per_tenant`. Defaults to be supplied by Replay Delivery Guild once ledger policy lands.

## Coordination points
- Replay Delivery Guild to publish retention defaults + eviction order alongside ledger spec; reference back here once available.
- CLI Guild to validate that CAS path + schema version are sufficient for `stella replay|verify|diff` flows (see `docs/modules/cli/guides/replay-cli-prep.md`).
- Ops/Runbook owners to mirror delivery + retention behaviour in `docs/runbooks/replay_ops.md` when promoted.

## Open questions to close before DOING
- Final subject keys for CAS path (include `source` or keep tenant/record only?).
- Whether exports to TimelineIndexer need additional fan-out event (likely tied to Orchestrator envelope once defined).
- Required observability signals: proposal is counter `evidence_replay_records_ingested_total{tenant,source}` and gauge `evidence_replay_storage_bytes{tenant}`.

## Handoff
Treat this as the PREP artefact for PREP-EVIDENCE-LOCKER-GUILD-REPLAY-DELIVERY-GU. Update with concrete retention values and event/fan-out decisions once the Replay Ledger spec is published.