flex-auth/workplans/FLEX-WP-0021-secrets-engine-consumer-policy-gate.md

---
id: FLEX-WP-0021
type: workplan
title: "secrets-engine consumer policy package and cluster-local pin"
domain: infotech
repo: flex-auth
status: proposed
owner: claude
topic_slug: netkingdom
planning_priority: P1
planning_order: 210
depends_on_workplans:
  - FLEX-WP-0012
  - FLEX-WP-0016
related_workplans:
  - SECRETS-WP-0009
created: "2026-09-06"
updated: "2026-09-06"
state_hub_workstream_id: "b01f655e-f71a-50ae-b110-178557f07c63"
---

# FLEX-WP-0021 — secrets-engine consumer policy package and cluster-local pin

Opened by `FLEX-DEC-2026-005`, answering secrets-engine's two questions of
2026-09-05. Both resolve to one piece of work in one order: **publish the
package, then pin it.**

## Why this exists

secrets-engine has already built its side. Commit `627810b` applies flex-auth's
PDP answers — `resource.type: secret-catalog-lane`, `resource.system:
secrets-engine`, catalog id as `request.resource.id` — and validates
`ActionAuthorization.decision.binding.request_digest` against
`flex-auth.decision-record.v1` with `status: approved` inside validity and
distinct approvers.

Two things it cannot supply itself:

1. `SECRETS_ENGINE_AUTHORIZATION_POLICY_PACKAGE` / `_VERSION` are required
   configuration with **no fallback**, deliberately. `secrets-engine.lifecycle/v1`
   is example vocabulary, not a published package. Until flex-auth publishes a
   real one, that configuration cannot be set to anything true.
2. There is no address for secrets-engine to call. flex-auth runs as
   per-consumer cluster-local pins with default-deny ingress admitting one
   approved workload each (`deploy/README.md`); no pin exists for
   secrets-engine. Its 2026-09-06 probe finding no reachable PDP found the
   design working, not an outage.

Glas real-key execution (`SECRETS-WP-0009-T03`) is the workload waiting.

## Boundary

flex-auth authors the policy package; secrets-engine owns the action vocabulary
it encodes and the enforcement around the verdict. flex-auth never mutates the
approval object — that is `approval-engine`'s (`security-layer-model_v0.7` §9.4)
— and validates approvals only as input claims. This plan does not default,
weaken, or supply a fallback for the consumer's package pin.

## 1. Obtain the real action vocabulary from secrets-engine

```task
id: FLEX-WP-0021-T01
status: todo
priority: high
state_hub_task_id: "3c191808-6fe5-5a9b-9a68-a4ce4a672dbd"
```

Owner: `flex-auth` to request and document; `secrets-engine` owns the answer.

- Ask secrets-engine for the authoritative action list over
  `secret-catalog-lane` — the operations it will actually gate, not the
  `secrets-engine.lifecycle/v1` example set.
- Record it in `docs/secrets-engine-action-vocabulary.md`, following
  `docs/tenant-engine-action-vocabulary.md`.
- Record the subject classes that may appear, and which of them are service
  accounts versus humans behind an approval.

Gate: every action in the vocabulary is named by secrets-engine, not inferred
here. An inferred action is a blocker, not a default.

## 2. Publish `secrets-engine.catalog-lane.lifecycle` v1

```task
id: FLEX-WP-0021-T02
status: todo
priority: high
state_hub_task_id: "38770813-dfcc-5711-bba3-0db50d3af135"
```

Owner: `flex-auth`.

- Write `examples/secrets-engine/policy_package.md` with
  `id: secrets-engine.catalog-lane.lifecycle`, `version: v1`, and an explicit
  `allow_ttl`. An omitted TTL takes the 15m engine default; `none`/`0s` denies
  with `allow_lifetime_unstated` rather than granting standing access.
- Add `protected_system_manifest.yaml`, `subject_manifest.yaml`,
  `resource_manifest.yaml`, and `registry_snapshot.json` for the namespace.
- Add allow and deny fixtures in `policy_fixtures.yaml` plus
  `check_request_*.json`, covering at minimum: an allow per vocabulary action,
  wrong-tenant deny, unknown-subject deny, and an approval-claim-absent deny.
- Add `examples/secrets-engine/README.md`.

Gate: `flex-auth validate` passes, the fixture tests pass, and the package
digest is stable across two runs.

## 3. Confirm the digest join against a real decision record

```task
id: FLEX-WP-0021-T03
status: todo
priority: high
state_hub_task_id: "8f7e5cdd-777e-5f54-9b92-c72b79f65672"
```

Owner: `flex-auth` to emit; `secrets-engine` to verify.

- Emit a real `DecisionEnvelope` from the package above and hand it to
  secrets-engine as the replay fixture for the join it built in `627810b`.
- Verify `binding.request_digest` reproduces as SHA-256 over canonical JSON of
  tenant/subject/action/resource/context per `docs/canonical-request-digest.md`.
- Verify `provenance.registry_snapshot_digest` is present — §9.7.2 promotes it
  to a conformance prerequisite and `FLEX-WP-0019` closed that gap.

Gate: secrets-engine confirms its validator accepts the real record unchanged.
A validator change on their side is their work-record, not closed from here.

## 4. Stand up the `flex-auth-secrets-engine` pin

```task
id: FLEX-WP-0021-T04
status: wait
priority: high
state_hub_task_id: "f4e8709a-65dd-5172-97ae-e7c3432afb22"
```

Owner: `flex-auth`; deployment approval required.

- Add `deploy/flex-auth-secrets-engine.yaml` as a three-document manifest —
  `Deployment`, `Service`, default-deny `NetworkPolicy` admitting ingress from
  the secrets-engine workload only — following the two existing pins.
- Promote through the Railiance overlay (`railiance/app.toml`,
  `charts/flex-auth`, `values/`), not by editing the flattened emergency files.
- Build in CI and deploy **by immutable digest**, never by tag. Do not roll the
  other pins: they are pinned to their own digests precisely so one policy
  change does not move another consumer.
- Start `callerAuth.mode` in `warn`. Flip to `enforce` only after secrets-engine
  adopts a calling identity and its warn logs are clean, as `FLEX-WP-0016` did
  for ops-warden.

Gate: the pin answers `POST /v1/check` for the secrets-engine workload and 
default-denies every other source; the other two pins are unchanged.

## 5. Hand the pin coordinates back and close

```task
id: FLEX-WP-0021-T05
status: wait
priority: medium
state_hub_task_id: "f0828871-fd65-5d8c-adfd-28b13fedd2b0"
```

Owner: `flex-auth`.

- Reply to secrets-engine with the Service DNS, the package id and version to
  set in `SECRETS_ENGINE_AUTHORIZATION_POLICY_PACKAGE` / `_VERSION`, and the
  `callerAuth` mode currently in force.
- Update `SCOPE.md` to list secrets-engine among the shipped consumers, and log
  a progress event.

Gate: secrets-engine can set its required configuration to published values and
reach a pin; nothing about the fallback-free shape of that configuration changed.