STATE-WP-0069: MCP Phase 1 deprecation + open_workplans summary alias

Complete MCP legacy deprecation coverage (resource + docstrings + TOOLS.md).
Dual-write open_workplans on /state/summary alongside open_workstreams;
get_domain_summary prefers the new key. T06 internal rename started.

tests/test_mcp_legacy_deprecation.py

@@ -26,7 +26,7 @@ def _fake_get(path: str, params: dict | None = None):
         return [{"id": "topic-1", "domain_slug": "infotech", "title": "Infotech"}]
     if path == "/state/summary":
         return {
-            "open_workstreams": [
+            "open_workplans": [
                 {
                     "id": "wp-1",
                     "topic_id": "topic-1",
@@ -48,6 +48,20 @@ def _fake_get(path: str, params: dict | None = None):
     return []
 
 
+def test_legacy_workstreams_resource_includes_deprecation(monkeypatch) -> None:
+    def fake_get(path: str, params: dict | None = None):
+        if path == "/topics":
+            return [{"id": "topic-1", "slug": "infotech", "domain_slug": "infotech"}]
+        if path == "/workstreams":
+            return [{"id": "wp-1", "title": "Demo", "slug": "demo-wp"}]
+        return []
+
+    monkeypatch.setattr(server, "_get", fake_get)
+    payload = json.loads(server.resource_workstreams("infotech"))
+    assert payload["_deprecation"]["replacement"] == "state://workplans/{topic_slug}"
+    assert payload["workplans"] == payload["workstreams"]
+
+
 def test_get_domain_summary_goal_guidance_is_workplan_first(monkeypatch) -> None:
     monkeypatch.setattr(server, "_get", lambda path, params=None: _fake_get(path, params))
     payload = json.loads(server.get_domain_summary("infotech"))

tests/test_routers_core.py

@@ -430,6 +430,8 @@ class TestStateSummary:
         assert r.status_code == 200
         body = r.json()
         assert "open_workstreams" in body
+        assert "open_workplans" in body
+        assert body["open_workplans"] == body["open_workstreams"]
         assert "blocking_decisions" in body
         assert "blocked_tasks" in body
         assert "domains" in body