state-hub/workplans/STATE-WP-0075-workstream-route-410-stranglers.md

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---
id: STATE-WP-0075
type: workplan
title: "Workstream REST route 410 stranglers"
domain: infotech
repo: state-hub
status: finished
owner: codex
topic_slug: custodian
planning_priority: high
planning_order: 75
created: "2026-07-10"
updated: "2026-07-10"
---
# STATE-WP-0075 — Workstream REST route 410 stranglers
**Parent:** `STATE-WP-0070` T02 (phase-2 legacy retirement).
**Handoff from:** `STATE-WP-0073` T04 (meter-cleared REST key retirement).
**Baseline evidence:** `docs/evidence/legacy-meter-weekly-review-20260710.json`
— phase-1 `/workstreams/*` keys at 0 calls (retirement candidates; ~2/7
consecutive 8h zero windows at capture time). Operator approved early 410 rollout
after caller remediation (`STATE-WP-0072`) drove hot-key counts to zero.
## Goal
Convert remaining phase-1 and phase-2 `/workstreams` REST aliases to **410 Gone**
stranglers that still meter final legacy usage, matching the existing
`DELETE /workstreams/{id}` and `GET /workstreams/workplan-index` pattern.
Preferred `/workplans/*` routes remain the only functional surface.
## Task: Shared retire_legacy_route helper
```task
id: STATE-WP-0075-T01
status: done
priority: high
```
1. Add `retire_legacy_route()` to `api/services/legacy_compat.py` — meter usage,
set deprecation headers, raise `HTTPException(410)`.
2. Refactor existing 410 routes (`workplan-index`, `DELETE`) to use the helper.
Done when all 410 stranglers share one code path for metering and headers.
## Task: Phase-1 workstream CRUD stranglers
```task
id: STATE-WP-0075-T02
status: done
priority: high
```
Return **410 Gone** on:
- `GET /workstreams/`
- `POST /workstreams/`
- `GET /workstreams/{workstream_id}`
- `PATCH /workstreams/{workstream_id}`
Keep `/workplans/*` handlers unchanged.
## Task: Phase-2 dependency and execution stranglers
```task
id: STATE-WP-0075-T03
status: done
priority: high
```
Return **410 Gone** on:
- `POST/GET/DELETE /workstreams/{workstream_id}/dependencies/…`
- `PATCH /execution/workstreams/{workstream_id}/intent`
## Task: Tests, backlog, and parent handoff
```task
id: STATE-WP-0075-T04
status: done
priority: high
```
1. Update `tests/test_legacy_meter.py` and `tests/test_routers_core.py` for 410
expectations on all retired keys.
2. Mark phase 1–2 REST keys retired in
`docs/workplan-terminology-legacy-retirement-backlog.md`.
3. Run `pytest tests/test_legacy_meter.py tests/test_routers_core.py`.
4. Register via `statehub fix-consistency --repo state-hub`.
5. Hand off completion to `STATE-WP-0070` T02 and close `STATE-WP-0073` T04.
Done when tests pass, workplan registered, and parent tasks reflect retirement.