---
id: RTEL-WP-0002
type: workplan
title: "Provide the Q2 receiving contract and prove signal delivery"
domain: financials
repo: railiance-telemetry
status: active
owner: codex
created: "2026-09-06"
updated: "2026-09-06"
related:
  - RTELE-WP-0001
  - RPF-WP-0036
state_hub_workstream_id: "08a5db92-7293-50d3-b589-55287b9850b3"
---

Bounded initial Q2 reference implementation for platform assurance. Producer
meaning stays in S3; deployable monitoring packaging stays with a selected
package owner. No public listener, credential custody or incident workflow.

## Define metadata-only receiving and retention contract

```task
id: RTEL-WP-0002-T01
status: done
priority: high
state_hub_task_id: "ac73553d-5bd4-5dff-8307-95a29bffe474"
```

Implemented `docs/signal-contract.md` and a pinned platform stream contract.
Exact identities/signals, finite states, payload limit, freshness, replay,
proposed retention and local recipient semantics are explicit. Live acceptance
of the proposed budgets and recipient remains T04, not implied by this schema.

## Implement durable receipt and operator inbox reference

```task
id: RTEL-WP-0002-T02
status: done
priority: high
state_hub_task_id: "dacc9e2d-9321-5d39-afc4-88326f5c6930"
```

SQLite acceptance and notices commit together; strict rejection, duplicate
idempotence, explicit acknowledgments and bounded retention are tested. This
is a local private CLI implementation; acceptance says local-inbox-only.

## Prove platform adaptation and absent-emission semantics locally

```task
id: RTEL-WP-0002-T03
status: done
priority: high
state_hub_task_id: "a8ed3588-4240-5278-b03f-04c3237a52f9"
```

Adapter preserves producer evaluation time and classifications. Tests prove
failure survives receiver restart, inbox addressing/acknowledgment, never-seen
and stopped-producer detection, replay refusal, wrong-scope rejection and
retention of unacknowledged evidence. Local simulated-time tests establish
implementation behavior, not actual scheduled notification delivery.

## Accept private runtime and controlled end-to-end delivery

```task
id: RTEL-WP-0002-T04
status: wait
priority: high
state_hub_task_id: "ceb14fdc-b3fd-5a22-870d-d835a9d52055"
```

Choose package/runtime execution owner with cluster/activity-core; confirm the
operator recipient, producer/watchdog cadence, retention/storage/backup and
private authenticated access. Install only through accepted authority. Prove a
controlled failure and stopped producer reach and are acknowledged by the named
operator, and receiver/scheduler failure is independently detectable. Preserve
receipts across restart; demonstrate capacity/retention handling. Only these
receipts can satisfy RPF-WP-0036-T04. No package repo name or deployment grant is
invented here. This live task holds the residual explicitly.