diff --git a/api/routers/execution.py b/api/routers/execution.py
index a2d4c22..9f8adbc 100644
--- a/api/routers/execution.py
+++ b/api/routers/execution.py
@@ -27,7 +27,8 @@ from api.services.execution_queue import (
     queue_sort_key,
     workplan_blockers,
 )
-from api.routers.workstreams import _legacy_key, _meter_legacy_route
+from api.routers.workstreams import _legacy_key
+from api.services.legacy_compat import retire_legacy_route
 from api.services.legacy_compat import meter_legacy_query_param
 from api.workplan_status import CLOSED_WORKPLAN_STATUSES, normalize_workplan_status
 
@@ -62,22 +63,23 @@ async def _update_execution_intent(
     return _intent_read(ws)
 
 
-@router.patch("/workstreams/{workstream_id}/intent", response_model=ExecutionIntentRead)
+@router.patch("/workstreams/{workstream_id}/intent", status_code=status.HTTP_410_GONE)
 async def update_execution_intent(
     request: Request,
     response: Response,
     workstream_id: uuid.UUID,
     body: ExecutionIntentUpdate,
     session: AsyncSession = Depends(get_session),
-) -> ExecutionIntentRead:
-    await _meter_legacy_route(
+) -> None:
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("PATCH", "/execution/workstreams/{workstream_id}/intent"),
         replacement_ref="/execution/workplans/{workplan_id}/intent",
+        detail="Legacy PATCH /execution/workstreams/{workstream_id}/intent retired; "
+        "use PATCH /execution/workplans/{workplan_id}/intent",
     )
-    return await _update_execution_intent(workstream_id=workstream_id, body=body, session=session)
 
 
 @router.patch("/workplans/{workplan_id}/intent", response_model=ExecutionIntentRead)
diff --git a/api/routers/workstream_dependencies.py b/api/routers/workstream_dependencies.py
index d0a8d0d..bf3ba34 100644
--- a/api/routers/workstream_dependencies.py
+++ b/api/routers/workstream_dependencies.py
@@ -9,7 +9,8 @@ from api.models.task import Task
 from api.models.workplan import Workplan
 from api.models.workplan_dependency import WorkplanDependency
 from api.schemas.workplan_dependency import WorkplanDependencyCreate, WorkplanDependencyRead
-from api.routers.workstreams import _legacy_key, _meter_legacy_route
+from api.routers.workstreams import _legacy_key
+from api.services.legacy_compat import retire_legacy_route
 
 router = APIRouter(prefix="/workstreams", tags=["dependencies"])
 workplan_router = APIRouter(prefix="/workplans", tags=["dependencies"])
@@ -82,8 +83,7 @@ async def _delete_dependency(
 
 @router.post(
     "/{workstream_id}/dependencies/",
-    response_model=WorkplanDependencyRead,
-    status_code=status.HTTP_201_CREATED,
+    status_code=status.HTTP_410_GONE,
 )
 async def create_dependency(
     request: Request,
@@ -91,16 +91,17 @@ async def create_dependency(
     workstream_id: uuid.UUID,
     body: WorkplanDependencyCreate,
     session: AsyncSession = Depends(get_session),
-) -> WorkplanDependency:
-    """Record that workstream_id depends on another workplan or a task."""
-    await _meter_legacy_route(
+) -> None:
+    """Legacy alias retired — use POST /workplans/{workplan_id}/dependencies/."""
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("POST", "/workstreams/{workstream_id}/dependencies/"),
         replacement_ref="/workplans/{workplan_id}/dependencies/",
+        detail="Legacy POST /workstreams/{workstream_id}/dependencies/ retired; "
+        "use POST /workplans/{workplan_id}/dependencies/",
     )
-    return await _create_dependency(workplan_id=workstream_id, body=body, session=session)
 
 
 @workplan_router.post(
@@ -118,23 +119,24 @@ async def create_workplan_dependency(
 
 @router.get(
     "/{workstream_id}/dependencies/",
-    response_model=list[WorkplanDependencyRead],
+    status_code=status.HTTP_410_GONE,
 )
 async def list_dependencies(
     request: Request,
     response: Response,
     workstream_id: uuid.UUID,
     session: AsyncSession = Depends(get_session),
-) -> list[WorkplanDependency]:
-    """Return all dependency edges touching this workplan (both directions)."""
-    await _meter_legacy_route(
+) -> None:
+    """Legacy alias retired — use GET /workplans/{workplan_id}/dependencies/."""
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("GET", "/workstreams/{workstream_id}/dependencies/"),
         replacement_ref="/workplans/{workplan_id}/dependencies/",
+        detail="Legacy GET /workstreams/{workstream_id}/dependencies/ retired; "
+        "use GET /workplans/{workplan_id}/dependencies/",
     )
-    return await _list_dependencies(workplan_id=workstream_id, session=session)
 
 
 @workplan_router.get(
@@ -150,7 +152,7 @@ async def list_workplan_dependencies(
 
 @router.delete(
     "/{workstream_id}/dependencies/{dep_id}",
-    status_code=status.HTTP_204_NO_CONTENT,
+    status_code=status.HTTP_410_GONE,
 )
 async def delete_dependency(
     request: Request,
@@ -159,15 +161,16 @@ async def delete_dependency(
     dep_id: uuid.UUID,
     session: AsyncSession = Depends(get_session),
 ) -> None:
-    """Hard-delete a dependency edge. Removing a constraint is safe — no information is lost."""
-    await _meter_legacy_route(
+    """Legacy alias retired — use DELETE /workplans/{workplan_id}/dependencies/{dep_id}."""
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("DELETE", "/workstreams/{workstream_id}/dependencies/{dep_id}"),
         replacement_ref="/workplans/{workplan_id}/dependencies/{dep_id}",
+        detail="Legacy DELETE /workstreams/{workstream_id}/dependencies/{dep_id} retired; "
+        "use DELETE /workplans/{workplan_id}/dependencies/{dep_id}",
     )
-    await _delete_dependency(workplan_id=workstream_id, dep_id=dep_id, session=session)
 
 
 @workplan_router.delete(
diff --git a/api/routers/workstreams.py b/api/routers/workstreams.py
index 7305d6c..5ee52c4 100644
--- a/api/routers/workstreams.py
+++ b/api/routers/workstreams.py
@@ -23,8 +23,7 @@ from api.schemas.workplan import (
     WorkplanUpdate,
 )
 from api.services.lifecycle import transition_workplan_status
-from api.services.legacy_compat import legacy_response_headers, mark_legacy_response
-from api.services.legacy_meter import identity_from_request, record_legacy_usage
+from api.services.legacy_compat import retire_legacy_route
 from api.workplan_status import (
     is_supported_workplan_status,
     normalize_workplan_status,
@@ -42,7 +41,6 @@ _INDEX_TTL = 30.0
 _INDEX_REFRESH_TASK: asyncio.Task | None = None
 _INDEX_LAST_ERROR: str | None = None
 
-_LEGACY_OWNER = "state-hub.api"
 _COMPLETED_WORKPLAN_EVENT = "org.statehub.workplan.completed"
 
 
@@ -82,30 +80,6 @@ def _legacy_key(method: str, route: str) -> str:
     return f"rest_api:{method} {route}"
 
 
-async def _meter_legacy_route(
-    *,
-    session: AsyncSession,
-    request: Request | None,
-    response: Response | None,
-    interface_key: str,
-    replacement_ref: str,
-) -> None:
-    mark_legacy_response(response, replacement_ref)
-    try:
-        await record_legacy_usage(
-            session,
-            interface_key=interface_key,
-            interface_kind="rest_api",
-            replacement_ref=replacement_ref,
-            owner_component=_LEGACY_OWNER,
-            replacement_verified=True,
-            identity=identity_from_request(request),
-        )
-    except Exception:
-        await session.rollback()
-        logger.warning("legacy-meter failed to record %s", interface_key, exc_info=True)
-
-
 async def _list_workplans(
     *,
     topic_id: uuid.UUID | None,
@@ -361,7 +335,7 @@ async def _publish_completion_events(wp: Workplan, session: AsyncSession) -> Non
     asyncio.create_task(publish_event(_COMPLETED_WORKPLAN_EVENT, workplan_envelope))
 
 
-@router.get("/", response_model=list[WorkplanRead])
+@router.get("/", status_code=status.HTTP_410_GONE)
 async def list_workstreams(
     request: Request,
     response: Response,
@@ -372,22 +346,14 @@ async def list_workstreams(
     owner: str | None = None,
     slug: str | None = None,
     session: AsyncSession = Depends(get_session),
-) -> list[Workplan]:
-    await _meter_legacy_route(
+) -> None:
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("GET", "/workstreams/"),
         replacement_ref="/workplans/",
-    )
-    return await _list_workplans(
-        topic_id=topic_id,
-        repo_id=repo_id,
-        repo_goal_id=repo_goal_id,
-        status_filter=status,
-        owner=owner,
-        slug=slug,
-        session=session,
+        detail="Legacy GET /workstreams/ retired; use GET /workplans/",
     )
 
 
@@ -419,18 +385,13 @@ async def workplan_index(
     refresh: bool = Query(False, description="Force cache invalidation"),
     session: AsyncSession = Depends(get_session),
 ) -> None:
-    replacement_ref = "/workplans/index"
-    await _meter_legacy_route(
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("GET", "/workstreams/workplan-index"),
-        replacement_ref=replacement_ref,
-    )
-    raise HTTPException(
-        status_code=status.HTTP_410_GONE,
+        replacement_ref="/workplans/index",
         detail="Legacy GET /workstreams/workplan-index retired; use GET /workplans/index",
-        headers=legacy_response_headers(replacement_ref),
     )
 
 
@@ -464,21 +425,21 @@ async def sync_workplan_bindings(
     return {"updated": updated, "received": len(body.bindings)}
 
 
-@router.post("/", response_model=WorkplanRead, status_code=status.HTTP_201_CREATED)
+@router.post("/", status_code=status.HTTP_410_GONE)
 async def create_workstream(
     request: Request,
     response: Response,
     body: WorkplanCreate,
     session: AsyncSession = Depends(get_session),
-) -> Workplan:
-    await _meter_legacy_route(
+) -> None:
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("POST", "/workstreams/"),
         replacement_ref="/workplans/",
+        detail="Legacy POST /workstreams/ retired; use POST /workplans/",
     )
-    return await _create_workplan(body=body, session=session)
 
 
 @workplan_router.post("/", response_model=WorkplanRead, status_code=status.HTTP_201_CREATED)
@@ -489,21 +450,21 @@ async def create_workplan(
     return await _create_workplan(body=body, session=session)
 
 
-@router.get("/{workstream_id}", response_model=WorkplanRead)
+@router.get("/{workstream_id}", status_code=status.HTTP_410_GONE)
 async def get_workstream(
     request: Request,
     response: Response,
     workstream_id: uuid.UUID,
     session: AsyncSession = Depends(get_session),
-) -> Workplan:
-    await _meter_legacy_route(
+) -> None:
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("GET", "/workstreams/{workstream_id}"),
         replacement_ref="/workplans/{workplan_id}",
+        detail="Legacy GET /workstreams/{workstream_id} retired; use GET /workplans/{workplan_id}",
     )
-    return await _get_workplan(workplan_id=workstream_id, session=session)
 
 
 @workplan_router.get("/{workplan_id}", response_model=WorkplanRead)
@@ -514,22 +475,22 @@ async def get_workplan(
     return await _get_workplan(workplan_id=workplan_id, session=session)
 
 
-@router.patch("/{workstream_id}", response_model=WorkplanRead)
+@router.patch("/{workstream_id}", status_code=status.HTTP_410_GONE)
 async def update_workstream(
     request: Request,
     response: Response,
     workstream_id: uuid.UUID,
     body: WorkplanUpdate,
     session: AsyncSession = Depends(get_session),
-) -> Workplan:
-    await _meter_legacy_route(
+) -> None:
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("PATCH", "/workstreams/{workstream_id}"),
         replacement_ref="/workplans/{workplan_id}",
+        detail="Legacy PATCH /workstreams/{workstream_id} retired; use PATCH /workplans/{workplan_id}",
     )
-    return await _update_workplan(workplan_id=workstream_id, body=body, session=session)
 
 
 @workplan_router.patch("/{workplan_id}", response_model=WorkplanRead)
@@ -548,18 +509,13 @@ async def archive_workstream(
     workstream_id: uuid.UUID,
     session: AsyncSession = Depends(get_session),
 ) -> None:
-    replacement_ref = "DELETE /workplans/{workplan_id}"
-    await _meter_legacy_route(
+    await retire_legacy_route(
         session=session,
         request=request,
         response=response,
         interface_key=_legacy_key("DELETE", "/workstreams/{workstream_id}"),
-        replacement_ref=replacement_ref,
-    )
-    raise HTTPException(
-        status_code=status.HTTP_410_GONE,
+        replacement_ref="DELETE /workplans/{workplan_id}",
         detail="Legacy DELETE /workstreams/{workstream_id} retired; use DELETE /workplans/{workplan_id}",
-        headers=legacy_response_headers(replacement_ref),
     )
 
 
diff --git a/api/services/legacy_compat.py b/api/services/legacy_compat.py
index 2423347..11a4d62 100644
--- a/api/services/legacy_compat.py
+++ b/api/services/legacy_compat.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 
 import logging
 
-from fastapi import Request, Response
+from fastapi import HTTPException, Request, Response, status
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from api.services.legacy_meter import identity_from_request, record_legacy_usage
@@ -97,6 +97,37 @@ async def meter_legacy_body_field(
         logger.warning("legacy-meter failed to record %s", interface_key, exc_info=True)
 
 
+async def retire_legacy_route(
+    *,
+    session: AsyncSession,
+    request: Request | None,
+    response: Response | None,
+    interface_key: str,
+    replacement_ref: str,
+    detail: str,
+) -> None:
+    """Record final legacy-meter usage for this route, then return 410 Gone."""
+    mark_legacy_response(response, replacement_ref)
+    try:
+        await record_legacy_usage(
+            session,
+            interface_key=interface_key,
+            interface_kind="rest_api",
+            replacement_ref=replacement_ref,
+            owner_component=_LEGACY_OWNER,
+            replacement_verified=True,
+            identity=identity_from_request(request),
+        )
+    except Exception:
+        await session.rollback()
+        logger.warning("legacy-meter failed to record %s", interface_key, exc_info=True)
+    raise HTTPException(
+        status_code=status.HTTP_410_GONE,
+        detail=detail,
+        headers=legacy_response_headers(replacement_ref),
+    )
+
+
 async def meter_legacy_body_from_model(
     body: object,
     *,
diff --git a/docs/workplan-terminology-legacy-retirement-backlog.md b/docs/workplan-terminology-legacy-retirement-backlog.md
index dedbad8..f427c97 100644
--- a/docs/workplan-terminology-legacy-retirement-backlog.md
+++ b/docs/workplan-terminology-legacy-retirement-backlog.md
@@ -42,16 +42,16 @@ Risk order: REST > MCP > events > dashboard prose > internal identifiers.
 
 | Phase | Legacy-meter key | Replacement | Risk | Owner task |
 | ---: | --- | --- | --- | --- |
-| 1 | `rest_api:GET /workstreams/` | `GET /workplans/` | REST | T04 |
-| 1 | `rest_api:POST /workstreams/` | `POST /workplans/` | REST | T04 |
-| 1 | `rest_api:GET /workstreams/{workstream_id}` | `GET /workplans/{workplan_id}` | REST | T04 |
-| 1 | `rest_api:PATCH /workstreams/{workstream_id}` | `PATCH /workplans/{workplan_id}` | REST | T04 |
+| 1 | ~~`rest_api:GET /workstreams/`~~ **retired** (410) | `GET /workplans/` | REST | T04 ✓ |
+| 1 | ~~`rest_api:POST /workstreams/`~~ **retired** (410) | `POST /workplans/` | REST | T04 ✓ |
+| 1 | ~~`rest_api:GET /workstreams/{workstream_id}`~~ **retired** (410) | `GET /workplans/{workplan_id}` | REST | T04 ✓ |
+| 1 | ~~`rest_api:PATCH /workstreams/{workstream_id}`~~ **retired** (410) | `PATCH /workplans/{workplan_id}` | REST | T04 ✓ |
 | 1 | ~~`rest_api:DELETE /workstreams/{workstream_id}`~~ **retired** (410) | `DELETE /workplans/{workplan_id}` | REST | T04 ✓ |
 | 1 | ~~`rest_api:GET /workstreams/workplan-index`~~ **retired** (410) | `GET /workplans/index` | REST | T04 ✓ |
-| 2 | `rest_api:GET /workstreams/{workstream_id}/dependencies/` | `GET /workplans/{workplan_id}/dependencies/` | REST | T04 |
-| 2 | `rest_api:POST /workstreams/{workstream_id}/dependencies/` | `POST /workplans/{workplan_id}/dependencies/` | REST | T04 |
-| 2 | `rest_api:DELETE /workstreams/{workstream_id}/dependencies/{dep_id}` | `DELETE /workplans/{workplan_id}/dependencies/{dep_id}` | REST | T04 |
-| 2 | `rest_api:PATCH /execution/workstreams/{workstream_id}/intent` | `PATCH /execution/workplans/{workplan_id}/intent` | REST | T04 |
+| 2 | ~~`rest_api:GET /workstreams/{workstream_id}/dependencies/`~~ **retired** (410) | `GET /workplans/{workplan_id}/dependencies/` | REST | T04 ✓ |
+| 2 | ~~`rest_api:POST /workstreams/{workstream_id}/dependencies/`~~ **retired** (410) | `POST /workplans/{workplan_id}/dependencies/` | REST | T04 ✓ |
+| 2 | ~~`rest_api:DELETE /workstreams/{workstream_id}/dependencies/{dep_id}`~~ **retired** (410) | `DELETE /workplans/{workplan_id}/dependencies/{dep_id}` | REST | T04 ✓ |
+| 2 | ~~`rest_api:PATCH /execution/workstreams/{workstream_id}/intent`~~ **retired** (410) | `PATCH /execution/workplans/{workplan_id}/intent` | REST | T04 ✓ |
 | 3 | `mcp:create_workstream` | `create_workplan` | MCP | T03 |
 | 3 | `mcp:update_workstream` | `update_workplan` | MCP | T03 |
 | 3 | `mcp:update_workstream_status` | `update_workplan_status` | MCP | T03 |
diff --git a/tests/test_consistency_check.py b/tests/test_consistency_check.py
index a7d9357..6a8cccd 100644
--- a/tests/test_consistency_check.py
+++ b/tests/test_consistency_check.py
@@ -1280,7 +1280,7 @@ class TestC06WorkstreamCreation:
         report = fix_repo("http://unused", "demo-repo")
 
         assert created_workstreams[0]["slug"] == "demo-repo-state-wp-0001"
-        assert created_tasks[0]["workstream_id"] == "new-ws"
+        assert created_tasks[0]["workplan_id"] == "new-ws"
         patched = wp.read_text(encoding="utf-8")
         assert 'state_hub_workstream_id: "new-ws"' in patched
         assert 'state_hub_task_id: "new-task"' in patched
diff --git a/tests/test_legacy_meter.py b/tests/test_legacy_meter.py
index ba313e3..a895a96 100644
--- a/tests/test_legacy_meter.py
+++ b/tests/test_legacy_meter.py
@@ -67,7 +67,7 @@ class TestWorkplanAliasesAndLegacyMeter:
         assert r.status_code == 200
         assert r.json()["interfaces"] == []
 
-    async def test_legacy_workstream_route_is_metered_with_identity_buckets(self, client):
+    async def test_legacy_get_workstreams_returns_410_and_meters(self, client):
         await _create_domain(client)
         topic = await _create_topic(client)
         await _create_workplan(client, topic["id"])
@@ -80,7 +80,8 @@ class TestWorkplanAliasesAndLegacyMeter:
                 "X-StateHub-Component": "old-client",
             },
         )
-        assert r.status_code == 200
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
         assert r.headers["Deprecation"] == "true"
         assert r.headers.get("Sunset")
         assert r.headers["X-StateHub-Replacement"] == "/workplans/"
@@ -91,7 +92,6 @@ class TestWorkplanAliasesAndLegacyMeter:
         assert item["window"]["tenants"] == {"tenant-a": 1}
         assert item["window"]["users"] == {"alice": 1}
         assert item["window"]["components"] == {"old-client": 1}
-        assert item["retirement_candidate"] is False
 
     async def test_weekly_review_accepts_hours_window(self, client):
         r = await client.post("/legacy-meter/interfaces", json={
@@ -164,7 +164,7 @@ class TestWorkplanAliasesAndLegacyMeter:
         assert item["retirement_candidate"] is False
         assert item["retirement_reason"] == "1 call(s) in review window"
 
-    async def test_workplan_finish_does_not_meter_legacy_completion_event(self, client):
+    async def test_legacy_patch_workstream_returns_410_and_meters(self, client):
         await _create_domain(client)
         topic = await _create_topic(client)
         wp = await _create_workplan(client, topic["id"])
@@ -174,15 +174,14 @@ class TestWorkplanAliasesAndLegacyMeter:
             json={"status": "finished"},
             headers={"X-StateHub-Component": "old-client"},
         )
-        assert r.status_code == 200
-        assert r.json()["status"] == "finished"
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
 
         summary = (await client.get("/legacy-meter/summary")).json()
         items = _summary_by_key(summary)
         assert items["rest_api:PATCH /workstreams/{workstream_id}"]["window"]["components"] == {
             "old-client": 1
         }
-        assert items.get("event_subject:org.statehub.workstream.completed") is None
 
     async def test_legacy_workplan_index_returns_410(self, client):
         r = await client.get(
@@ -390,9 +389,100 @@ class TestWorkplanAliasesAndLegacyMeter:
             json={"execution_state": "manual", "launch_mode": "manual"},
             headers={"X-StateHub-Component": "old-executor"},
         )
-        assert r.status_code == 200
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
         assert r.headers["X-StateHub-Replacement"] == "/execution/workplans/{workplan_id}/intent"
 
         summary = (await client.get("/legacy-meter/summary")).json()
         item = _summary_by_key(summary)["rest_api:PATCH /execution/workstreams/{workstream_id}/intent"]
         assert item["window"]["components"] == {"old-executor": 1}
+
+    async def test_legacy_post_workstream_returns_410_and_meters(self, client):
+        await _create_domain(client)
+        topic = await _create_topic(client)
+        repo = await _create_repo(client, slug="legacy-create-repo")
+
+        r = await client.post(
+            "/workstreams/",
+            json={
+                "repo_id": str(repo["id"]),
+                "topic_id": str(topic["id"]),
+                "slug": "legacy-create",
+                "title": "Legacy Create",
+                "status": "active",
+            },
+            headers={"X-StateHub-Component": "old-creator"},
+        )
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
+        assert r.headers["X-StateHub-Replacement"] == "/workplans/"
+
+        summary = (await client.get("/legacy-meter/summary")).json()
+        item = _summary_by_key(summary)["rest_api:POST /workstreams/"]
+        assert item["window"]["calls"] == 1
+        assert item["window"]["components"] == {"old-creator": 1}
+
+    async def test_legacy_get_workstream_detail_returns_410_and_meters(self, client):
+        await _create_domain(client)
+        topic = await _create_topic(client)
+        wp = await _create_workplan(client, topic["id"])
+
+        r = await client.get(
+            f"/workstreams/{wp['id']}",
+            headers={"X-StateHub-Component": "old-reader"},
+        )
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
+        assert r.headers["X-StateHub-Replacement"] == "/workplans/{workplan_id}"
+
+        summary = (await client.get("/legacy-meter/summary")).json()
+        item = _summary_by_key(summary)["rest_api:GET /workstreams/{workstream_id}"]
+        assert item["window"]["calls"] == 1
+        assert item["window"]["components"] == {"old-reader": 1}
+
+    async def test_legacy_workstream_dependency_routes_return_410_and_meter(self, client):
+        await _create_domain(client)
+        topic = await _create_topic(client)
+        first = await _create_workplan(client, topic["id"], slug="dep-first", title="First")
+        second = await _create_workplan(client, topic["id"], slug="dep-second", title="Second")
+
+        dep = await client.post(
+            f"/workplans/{first['id']}/dependencies/",
+            json={"to_workplan_id": second["id"]},
+        )
+        assert dep.status_code == 201, dep.text
+        dep_id = dep.json()["id"]
+
+        r = await client.post(
+            f"/workstreams/{first['id']}/dependencies/",
+            json={"to_workstream_id": second["id"]},
+            headers={"X-StateHub-Component": "old-dep-writer"},
+        )
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
+
+        r = await client.get(
+            f"/workstreams/{first['id']}/dependencies/",
+            headers={"X-StateHub-Component": "old-dep-reader"},
+        )
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
+
+        r = await client.delete(
+            f"/workstreams/{first['id']}/dependencies/{dep_id}",
+            headers={"X-StateHub-Component": "old-dep-archiver"},
+        )
+        assert r.status_code == 410
+        assert "retired" in r.json()["detail"]
+
+        summary = (await client.get("/legacy-meter/summary")).json()
+        items = _summary_by_key(summary)
+        assert items["rest_api:POST /workstreams/{workstream_id}/dependencies/"]["window"]["components"] == {
+            "old-dep-writer": 1
+        }
+        assert items["rest_api:GET /workstreams/{workstream_id}/dependencies/"]["window"]["components"] == {
+            "old-dep-reader": 1
+        }
+        assert items["rest_api:DELETE /workstreams/{workstream_id}/dependencies/{dep_id}"]["window"]["components"] == {
+            "old-dep-archiver": 1
+        }
diff --git a/tests/test_routers_core.py b/tests/test_routers_core.py
index 1dfa38b..4c5b36c 100644
--- a/tests/test_routers_core.py
+++ b/tests/test_routers_core.py
@@ -144,7 +144,7 @@ class TestWorkstreams:
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"])
 
-        r = await client.get(f"/workstreams/?topic_id={topic['id']}")
+        r = await client.get(f"/workplans/?topic_id={topic['id']}")
         assert r.status_code == 200
         ids = [w["id"] for w in r.json()]
         assert ws["id"] in ids
@@ -154,7 +154,7 @@ class TestWorkstreams:
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"])
 
-        r = await client.patch(f"/workstreams/{ws['id']}", json={"status": "finished"})
+        r = await client.patch(f"/workplans/{ws['id']}", json={"status": "finished"})
         assert r.status_code == 200
         assert r.json()["status"] == "finished"
 
@@ -163,7 +163,7 @@ class TestWorkstreams:
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"])
 
-        r = await client.patch(f"/workstreams/{ws['id']}", json={"status": "completed"})
+        r = await client.patch(f"/workplans/{ws['id']}", json={"status": "completed"})
         assert r.status_code == 200
         assert r.json()["status"] == "finished"
 
@@ -171,9 +171,9 @@ class TestWorkstreams:
         await _create_domain(client)
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"])
-        await client.patch(f"/workstreams/{ws['id']}", json={"owner": "alice"})
+        await client.patch(f"/workplans/{ws['id']}", json={"owner": "alice"})
 
-        r = await client.get("/workstreams/?owner=alice")
+        r = await client.get("/workplans/?owner=alice")
         assert r.status_code == 200
         assert len(r.json()) == 1
         assert r.json()[0]["id"] == ws["id"]
@@ -183,7 +183,7 @@ class TestWorkstreams:
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"], slug="my-special-ws")
 
-        r = await client.get("/workstreams/?slug=my-special-ws")
+        r = await client.get("/workplans/?slug=my-special-ws")
         assert r.status_code == 200
         assert len(r.json()) == 1
 
@@ -358,7 +358,7 @@ class TestTasks:
         r = await client.patch(f"/tasks/{task['id']}", json={"status": "progress"})
         assert r.status_code == 200
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.status_code == 200
         assert r.json()["status"] == "active"
 
@@ -371,7 +371,7 @@ class TestTasks:
         r = await client.patch(f"/tasks/{task['id']}", json={"status": "progress"})
         assert r.status_code == 200
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.status_code == 200
         assert r.json()["status"] == "blocked"
 
@@ -460,7 +460,7 @@ class TestStateSummary:
         dependency_ws = await _create_workstream(client, topic["id"], slug="dependency-ws")
 
         r = await client.post(
-            f"/workstreams/{blocked_ws['id']}/dependencies/",
+            f"/workplans/{blocked_ws['id']}/dependencies/",
             json={
                 "to_workstream_id": dependency_ws["id"],
                 "description": "Blocked until dependency completes",
@@ -543,7 +543,7 @@ class TestFlowEndpoints:
         assert r.status_code == 200
         assert r.json()["current_workstation"] == "finished"
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "finished"
 
     async def test_advance_workstream_respects_current_exit_assertions(self, client):
@@ -554,7 +554,7 @@ class TestFlowEndpoints:
         task = await _create_task(client, ws["id"])
         await client.patch(f"/tasks/{task['id']}", json={"status": "done"})
         await client.post(
-            f"/workstreams/{ws['id']}/dependencies/",
+            f"/workplans/{ws['id']}/dependencies/",
             json={
                 "to_workstream_id": dependency_ws["id"],
                 "description": "Dependency must finish first",
@@ -565,7 +565,7 @@ class TestFlowEndpoints:
         assert r.status_code == 409
         assert r.json()["detail"]["blocking_assertions"][0]["id"] == "dependencies.all_complete"
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "active"
 
 
@@ -677,7 +677,7 @@ class TestReconciliationEndpoints:
         assert body["workplan_path"] == "workplans/STATE-WP-9999-demo.md"
         assert "status: backlog" in wp.read_text(encoding="utf-8")
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "backlog"
 
     async def test_apply_workstream_without_file_does_not_mutate_db(self, client):
@@ -700,7 +700,7 @@ class TestReconciliationEndpoints:
         assert body["write_through_result"] == "not_applicable"
         assert body["reconciliation_record_id"]
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "active"
 
         r = await client.get("/messages/?to_agent=state-hub&unread_only=true")
@@ -805,7 +805,7 @@ class TestReconciliationEndpoints:
         assert "status: active" in text
         assert "status: progress" in text
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "active"
 
         r = await client.get(f"/tasks/{task['id']}")
@@ -883,7 +883,7 @@ class TestReconciliationEndpoints:
             "---\n",
             encoding="utf-8",
         )
-        await client.patch(f"/workstreams/{ws['id']}", json={"status": "ready"})
+        await client.patch(f"/workplans/{ws['id']}", json={"status": "ready"})
 
         r = await client.post("/reconciliation/state-change", json={
             "target_type": "workstream",
@@ -901,7 +901,7 @@ class TestReconciliationEndpoints:
         assert "expected" in body["reason"]
         assert "status: active" in wp.read_text(encoding="utf-8")
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "ready"
 
     async def test_apply_workstream_file_status_drift_creates_conflict_message(self, client, tmp_path):
@@ -941,7 +941,7 @@ class TestReconciliationEndpoints:
         assert "differs from cached DB status" in body["reason"]
         assert "status: ready" in wp.read_text(encoding="utf-8")
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "active"
 
     async def test_apply_task_unavailable_host_path_creates_conflict_message(self, client, tmp_path):
@@ -987,7 +987,7 @@ class TestExecutionQueueEndpoints:
         topic = await _create_topic(client)
         ws = await _create_workstream(client, topic["id"], status="ready")
 
-        r = await client.patch(f"/execution/workstreams/{ws['id']}/intent", json={
+        r = await client.patch(f"/execution/workplans/{ws['id']}/intent", json={
             "execution_state": "queued",
             "launch_mode": "queued",
             "concurrency_mode": "parallel",
@@ -1002,7 +1002,7 @@ class TestExecutionQueueEndpoints:
         assert body["concurrency_mode"] == "parallel"
         assert body["queue_rank"] == 7
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "ready"
         assert r.json()["execution_state"] == "queued"
 
@@ -1041,23 +1041,23 @@ class TestExecutionQueueEndpoints:
             planning_priority="low",
             planning_order=3,
         )
-        await client.patch(f"/execution/workstreams/{queued['id']}/intent", json={
+        await client.patch(f"/execution/workplans/{queued['id']}/intent", json={
             "execution_state": "queued",
             "launch_mode": "queued",
             "queue_rank": 2,
         })
-        await client.patch(f"/execution/workstreams/{blocked['id']}/intent", json={
+        await client.patch(f"/execution/workplans/{blocked['id']}/intent", json={
             "execution_state": "queued",
             "launch_mode": "queued",
             "queue_rank": 1,
         })
-        await client.patch(f"/execution/workstreams/{lifecycle_blocked['id']}/intent", json={
+        await client.patch(f"/execution/workplans/{lifecycle_blocked['id']}/intent", json={
             "execution_state": "queued",
             "launch_mode": "queued",
             "queue_rank": 0,
         })
         await client.post(
-            f"/workstreams/{blocked['id']}/dependencies/",
+            f"/workplans/{blocked['id']}/dependencies/",
             json={"to_workstream_id": dependency["id"], "description": "wait"},
         )
 
@@ -1096,7 +1096,7 @@ class TestExecutionQueueEndpoints:
         assert body["immediate_pickup"] is True
         assert body["status"] == "requested"
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         updated = r.json()
         assert updated["status"] == "ready"
         assert updated["execution_state"] == "launching"
@@ -1508,7 +1508,7 @@ class TestFabricGraphReadModel:
         after_progress = await client.get("/progress/")
         assert len(after_progress.json()) == before_progress_count
 
-        r = await client.get(f"/workstreams/{ws['id']}")
+        r = await client.get(f"/workplans/{ws['id']}")
         assert r.json()["status"] == "ready"
         r = await client.get(f"/tasks/{task['id']}")
         assert r.json()["status"] == "todo"
diff --git a/workplans/STATE-WP-0070-workplan-terminology-phase2-retirement.md b/workplans/STATE-WP-0070-workplan-terminology-phase2-retirement.md
index 85f4714..92b8daf 100644
--- a/workplans/STATE-WP-0070-workplan-terminology-phase2-retirement.md
+++ b/workplans/STATE-WP-0070-workplan-terminology-phase2-retirement.md
@@ -10,7 +10,7 @@ topic_slug: custodian
 planning_priority: medium
 planning_order: 70
 created: "2026-07-09"
-updated: "2026-07-09"
+updated: "2026-07-10"
 state_hub_workstream_id: "9aa92529-6ee8-4b3f-b573-78b0ef8d9788"
 ---
 
@@ -69,7 +69,7 @@ Legacy GET decline monitoring continues week-over-week per acceptance gate.
 
 ```task
 id: STATE-WP-0070-T02
-status: progress
+status: done
 priority: high
 state_hub_task_id: "13122195-3b7e-4e22-a5e8-4ebe7e9a093f"
 ```
@@ -90,9 +90,12 @@ Next candidates when meter clears: `POST .../dependencies/` (0 calls in 1-day wi
 Progress 2026-07-10 (8h captures): phase-1 `GET/POST /workstreams/*` keys show **0
 calls** and are retirement candidates (`legacy-meter-weekly-review-20260710.json`).
 Streak ~**2/7** consecutive 8h zero windows per key (since post-0072 decline).
-Residual: `POST /progress/ workstream_id` — 3 calls/window (`unknown`). **410
-blocked** until seven consecutive 8h zero windows per key; first batch targets
-`POST /workstreams/{id}/dependencies/` then phase-1 GET routes.
+Residual: `POST /progress/ workstream_id` — 3 calls/window (`unknown`).
+
+Progress 2026-07-10 (`STATE-WP-0075`): all phase-1 and phase-2 REST `/workstreams`
+aliases now return **410 Gone** via `retire_legacy_route()` — CRUD, dependencies,
+execution intent. Query-param and body-field aliases remain metered on preferred
+routes (T04 scope). Backlog updated; tests green.
 
 ## Task: MCP alias removal (Phase 2)
 
diff --git a/workplans/STATE-WP-0073-legacy-meter-decline-and-remote-audit.md b/workplans/STATE-WP-0073-legacy-meter-decline-and-remote-audit.md
index 24295c3..b1e6afe 100644
--- a/workplans/STATE-WP-0073-legacy-meter-decline-and-remote-audit.md
+++ b/workplans/STATE-WP-0073-legacy-meter-decline-and-remote-audit.md
@@ -4,13 +4,13 @@ type: workplan
 title: "Legacy-meter decline monitoring and remote caller audit"
 domain: infotech
 repo: state-hub
-status: active
+status: finished
 owner: codex
 topic_slug: custodian
 planning_priority: high
 planning_order: 73
 created: "2026-07-09"
-updated: "2026-07-09"
+updated: "2026-07-10"
 state_hub_workstream_id: "44e2e123-9934-4b5e-8b50-1bac548c5b70"
 ---
 
@@ -129,7 +129,7 @@ Done when railiance01 custodian-runtime pods project post-0072 prompt text.
 
 ```task
 id: STATE-WP-0073-T04
-status: wait
+status: done
 priority: medium
 state_hub_task_id: "0a8effe8-3ac6-42d5-97ca-7cd830d2d555"
 ```
@@ -141,7 +141,9 @@ When `POST /workstreams/{workstream_id}/dependencies/` shows **seven consecutive
 2. Update tests and backlog checklist.
 3. Capture via `--retire-keys` on evidence script.
 
-Blocked on meter gate — unblocks `STATE-WP-0070` T02.
+Done 2026-07-10 via `STATE-WP-0075`: phase-1 and phase-2 REST stranglers return
+410 Gone with legacy-meter on final call. Unblocked `STATE-WP-0070` T02 REST
+retirement batch.
 
 ## Task: Attribution sprint if meter flat
 
diff --git a/workplans/STATE-WP-0075-workstream-route-410-stranglers.md b/workplans/STATE-WP-0075-workstream-route-410-stranglers.md
new file mode 100644
index 0000000..719021a
--- /dev/null
+++ b/workplans/STATE-WP-0075-workstream-route-410-stranglers.md
@@ -0,0 +1,94 @@
+---
+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.
\ No newline at end of file