STATE-WP-0070: identity headers, archive 0069, phase-2 workplan

Add X-StateHub-Component to fix-consistency and other State Hub REST callers for
legacy-meter attribution. Archive STATE-WP-0069; open STATE-WP-0070 for
meter-gated phase-2 retirement. Task POST bodies use workplan_id only.

workplans/STATE-WP-0070-workplan-terminology-phase2-retirement.md

@@ -0,0 +1,113 @@
+---
+id: STATE-WP-0070
+type: workplan
+title: "Workplan terminology phase-2 legacy retirement"
+domain: infotech
+repo: state-hub
+status: active
+owner: codex
+topic_slug: custodian
+planning_priority: medium
+planning_order: 70
+created: "2026-07-09"
+updated: "2026-07-09"
+state_hub_workstream_id: "9aa92529-6ee8-4b3f-b573-78b0ef8d9788"
+---
+
+# STATE-WP-0070 — Workplan terminology phase-2 legacy retirement
+
+**Parent:** `STATE-WP-0069` (finished 2026-07-08, archived).
+
+**Prerequisite:** Caller migrations shipped (`b05ca2c+`), identity headers on
+fix-consistency and dashboard loaders, activity-core progress dual-write stopped.
+
+## Goal
+
+Drive legacy-meter counts to zero per key, then retire remaining `/workstreams`
+routes, MCP aliases, and internal dual-keys. All removals remain
+**meter-gated** (seven consecutive zero-usage windows).
+
+## Context
+
+Live meter (2026-07-09) still shows ~150k weekly legacy GET calls — attributed
+to `unknown` until identity headers deploy and remote fix-consistency hosts pull
+latest `state-hub`. Evidence: `docs/evidence/legacy-meter-weekly-review-20260708.json`,
+caller inventory: `docs/evidence/workstream-caller-inventory-20260708.md`.
+
+## Task: Deploy caller migrations and verify meter attribution
+
+```task
+id: STATE-WP-0070-T01
+status: progress
+priority: high
+state_hub_task_id: "04cb3a3a-fe52-480b-816b-37c8f8fbe5ee"
+```
+
+1. Pull `state-hub` ≥ `b05ca2c` on all fix-consistency hosts (railiance01 sweep,
+   WSL workstation, cluster runners).
+2. Run full `statehub fix-consistency --all` (or scheduled sweep).
+3. Capture weekly review; confirm `X-StateHub-Component` buckets name
+   `state-hub.fix-consistency` instead of `unknown`.
+4. Expect `GET /workstreams/*` window counts to fall sharply.
+
+Done when a post-deploy capture shows attributed components and declining legacy
+REST counts.
+
+## Task: Retire remaining REST `/workstreams` routes per key
+
+```task
+id: STATE-WP-0070-T02
+status: todo
+priority: high
+state_hub_task_id: "13122195-3b7e-4e22-a5e8-4ebe7e9a093f"
+```
+
+For each key in `docs/workplan-terminology-legacy-retirement-backlog.md` phase 1–2
+still showing usage:
+
+- `GET/POST/PATCH /workstreams/*`
+- dependency and execution intent aliases
+
+Return **410 Gone** (matching DELETE pattern) when legacy-meter shows seven
+consecutive zero-usage windows. Update tests and capture evidence per retirement.
+
+## Task: MCP alias removal (Phase 2)
+
+```task
+id: STATE-WP-0070-T03
+status: todo
+priority: medium
+state_hub_task_id: "e2b9015a-d157-4677-b700-165f1cf7e2af"
+```
+
+Remove `create_workstream`, `update_workstream`, `list_workstreams`,
+`update_workstream_status`, and `state://workstreams/{topic_slug}` when MCP
+procedure keys hit zero usage for seven windows. Keep `TOOLS.md` migration notes.
+
+## Task: Internal dual-key and param alias cleanup
+
+```task
+id: STATE-WP-0070-T04
+status: todo
+priority: low
+state_hub_task_id: "18af98bf-c74e-47c8-948a-e713cff88bb8"
+```
+
+- Drop `open_workstreams` from `/state/summary` when meter clears.
+- Remove `workstream_id` query/body aliases on preferred routes.
+- Retire `flows/workstream.yaml` when no callers remain.
+
+## Task: Closeout and fleet gate
+
+```task
+id: STATE-WP-0070-T05
+status: todo
+priority: medium
+state_hub_task_id: "dcc81665-ef84-4c0a-a88f-d8afc0d1bbb9"
+```
+
+Re-run `scan_workstream_terminology.py`, grep budget check, full test suite,
+archive this workplan, notify CUST-WP-0055 fleet gate complete.
+
+Done when legacy-meter weekly review shows no active legacy REST keys and MCP
+aliases are removed or marked retired.