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diff --git a/tests/__pycache__/test_propose.cpython-312-pytest-9.0.2.pyc b/tests/__pycache__/test_propose.cpython-312-pytest-9.0.2.pyc
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diff --git a/tests/test_propose.py b/tests/test_propose.py
index 97469e2..d9d88c0 100644
--- a/tests/test_propose.py
+++ b/tests/test_propose.py
@@ -1,4 +1,4 @@
-"""P13.3 — Propose backend tests.
+"""Proposal backend tests (renamed from Propose).
 
 Covers:
 - CRUD: create, list, get, update
@@ -8,8 +8,9 @@ Covers:
 - reject → status change
 - rejected → reopen back to open
 - feat_task_id cannot be set manually
-- edit restrictions (only open proposes editable)
+- edit restrictions (only open proposals editable)
 - permission checks for accept/reject/reopen
+- Legacy /proposes endpoint still works
 """
 import pytest
 from app.models.milestone import MilestoneStatus
@@ -20,7 +21,14 @@ from app.models.task import TaskStatus
 # Helpers
 # ---------------------------------------------------------------------------
 
-def _propose_url(project_id: int, propose_id: int | None = None) -> str:
+def _proposal_url(project_id: int, proposal_id: int | None = None) -> str:
+    """Canonical /proposals URL."""
+    base = f"/projects/{project_id}/proposals"
+    return f"{base}/{proposal_id}" if proposal_id else base
+
+
+def _legacy_propose_url(project_id: int, propose_id: int | None = None) -> str:
+    """Legacy /proposes URL for backward-compat tests."""
     base = f"/projects/{project_id}/proposes"
     return f"{base}/{propose_id}" if propose_id else base
 
@@ -29,10 +37,10 @@ def _propose_url(project_id: int, propose_id: int | None = None) -> str:
 # CRUD
 # ===========================================================================
 
-class TestProposeCRUD:
+class TestProposalCRUD:
     """Basic create / list / get / update."""
 
-    def test_create_propose(
+    def test_create_proposal(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -41,7 +49,7 @@ class TestProposeCRUD:
         make_member(project.id, user.id, dev_role.id)
 
         resp = client.post(
-            _propose_url(project.id),
+            _proposal_url(project.id),
             json={"title": "New Feature Idea", "description": "Some details"},
             headers=auth_header(user),
         )
@@ -52,7 +60,7 @@ class TestProposeCRUD:
         assert data["propose_code"].startswith("PROJ:P")
         assert data["feat_task_id"] is None
 
-    def test_list_proposes(
+    def test_list_proposals(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -60,15 +68,15 @@ class TestProposeCRUD:
         project = make_project(owner_id=user.id)
         make_member(project.id, user.id, dev_role.id)
 
-        # Create two proposes
-        client.post(_propose_url(project.id), json={"title": "P1"}, headers=auth_header(user))
-        client.post(_propose_url(project.id), json={"title": "P2"}, headers=auth_header(user))
+        # Create two proposals
+        client.post(_proposal_url(project.id), json={"title": "P1"}, headers=auth_header(user))
+        client.post(_proposal_url(project.id), json={"title": "P2"}, headers=auth_header(user))
 
-        resp = client.get(_propose_url(project.id), headers=auth_header(user))
+        resp = client.get(_proposal_url(project.id), headers=auth_header(user))
         assert resp.status_code == 200
         assert len(resp.json()) == 2
 
-    def test_get_propose(
+    def test_get_proposal(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -76,14 +84,14 @@ class TestProposeCRUD:
         project = make_project(owner_id=user.id)
         make_member(project.id, user.id, dev_role.id)
 
-        create_resp = client.post(_propose_url(project.id), json={"title": "P1"}, headers=auth_header(user))
-        propose_id = create_resp.json()["id"]
+        create_resp = client.post(_proposal_url(project.id), json={"title": "P1"}, headers=auth_header(user))
+        proposal_id = create_resp.json()["id"]
 
-        resp = client.get(_propose_url(project.id, propose_id), headers=auth_header(user))
+        resp = client.get(_proposal_url(project.id, proposal_id), headers=auth_header(user))
         assert resp.status_code == 200
         assert resp.json()["title"] == "P1"
 
-    def test_update_propose_open(
+    def test_update_proposal_open(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -91,11 +99,11 @@ class TestProposeCRUD:
         project = make_project(owner_id=user.id)
         make_member(project.id, user.id, dev_role.id)
 
-        create_resp = client.post(_propose_url(project.id), json={"title": "Old"}, headers=auth_header(user))
-        propose_id = create_resp.json()["id"]
+        create_resp = client.post(_proposal_url(project.id), json={"title": "Old"}, headers=auth_header(user))
+        proposal_id = create_resp.json()["id"]
 
         resp = client.patch(
-            _propose_url(project.id, propose_id),
+            _proposal_url(project.id, proposal_id),
             json={"title": "New Title", "description": "Updated"},
             headers=auth_header(user),
         )
@@ -105,11 +113,11 @@ class TestProposeCRUD:
 
 
 # ===========================================================================
-# Propose Code
+# Proposal Code
 # ===========================================================================
 
-class TestProposeCode:
-    """P1.4 — propose_code increments per project independently."""
+class TestProposalCode:
+    """propose_code increments per project independently."""
 
     def test_code_increments_per_project(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
@@ -122,11 +130,11 @@ class TestProposeCode:
         make_member(proj_b.id, user.id, dev_role.id)
 
         # Create 2 in ALPHA
-        r1 = client.post(_propose_url(proj_a.id), json={"title": "A1"}, headers=auth_header(user))
-        r2 = client.post(_propose_url(proj_a.id), json={"title": "A2"}, headers=auth_header(user))
+        r1 = client.post(_proposal_url(proj_a.id), json={"title": "A1"}, headers=auth_header(user))
+        r2 = client.post(_proposal_url(proj_a.id), json={"title": "A2"}, headers=auth_header(user))
 
         # Create 1 in BETA
-        r3 = client.post(_propose_url(proj_b.id), json={"title": "B1"}, headers=auth_header(user))
+        r3 = client.post(_proposal_url(proj_b.id), json={"title": "B1"}, headers=auth_header(user))
 
         code1 = r1.json()["propose_code"]
         code2 = r2.json()["propose_code"]
@@ -144,7 +152,7 @@ class TestProposeCode:
 # ===========================================================================
 
 class TestAccept:
-    """P6.2 — accept propose → create feature story task."""
+    """accept proposal → create feature story task."""
 
     def test_accept_success(
         self, client, db, make_user, make_project, make_milestone, seed_roles_and_permissions, make_member, auth_header,
@@ -157,14 +165,14 @@ class TestAccept:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.OPEN)
 
         create_resp = client.post(
-            _propose_url(project.id),
+            _proposal_url(project.id),
             json={"title": "Cool Feature", "description": "Do something cool"},
             headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
@@ -196,14 +204,14 @@ class TestAccept:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.FREEZE)
 
         create_resp = client.post(
-            _propose_url(project.id),
+            _proposal_url(project.id),
             json={"title": "Feature X"},
             headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
@@ -221,20 +229,20 @@ class TestAccept:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.OPEN)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # First accept
         client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
 
         # Second accept should fail
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
@@ -251,12 +259,12 @@ class TestAccept:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.OPEN)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
@@ -264,7 +272,7 @@ class TestAccept:
         assert data["feat_task_id"] is not None
 
         # Re-fetch to confirm persistence
-        get_resp = client.get(_propose_url(project.id, propose_id), headers=auth_header(mgr))
+        get_resp = client.get(_proposal_url(project.id, proposal_id), headers=auth_header(mgr))
         assert get_resp.json()["feat_task_id"] == data["feat_task_id"]
 
     def test_accept_no_permission_fails(
@@ -280,15 +288,15 @@ class TestAccept:
 
         ms = make_milestone(project.id, owner.id, status=MilestoneStatus.OPEN)
 
-        # Dev creates the propose
+        # Dev creates the proposal
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Dev tries to accept — should fail
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(dev_user),
         )
@@ -300,7 +308,7 @@ class TestAccept:
 # ===========================================================================
 
 class TestReject:
-    """P6.3 — reject propose."""
+    """reject proposal."""
 
     def test_reject_success(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
@@ -311,12 +319,12 @@ class TestReject:
         make_member(project.id, mgr.id, mgr_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "Not needed"},
             headers=auth_header(mgr),
         )
@@ -334,20 +342,20 @@ class TestReject:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.OPEN)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Accept first
         client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
 
         # Now reject should fail
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "Changed mind"},
             headers=auth_header(mgr),
         )
@@ -364,12 +372,12 @@ class TestReject:
         make_member(project.id, dev_user.id, dev_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "nah"},
             headers=auth_header(dev_user),
         )
@@ -381,7 +389,7 @@ class TestReject:
 # ===========================================================================
 
 class TestReopen:
-    """P6.4 — reopen rejected propose."""
+    """reopen rejected proposal."""
 
     def test_reopen_success(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
@@ -392,20 +400,20 @@ class TestReopen:
         make_member(project.id, mgr.id, mgr_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Reject first
         client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "wait"},
             headers=auth_header(mgr),
         )
 
         # Reopen
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reopen",
+            _proposal_url(project.id, proposal_id) + "/reopen",
             headers=auth_header(mgr),
         )
         assert resp.status_code == 200
@@ -420,13 +428,13 @@ class TestReopen:
         make_member(project.id, mgr.id, mgr_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
-        # Try reopen on open propose — should fail
+        # Try reopen on open proposal — should fail
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reopen",
+            _proposal_url(project.id, proposal_id) + "/reopen",
             headers=auth_header(mgr),
         )
         assert resp.status_code == 400
@@ -442,20 +450,20 @@ class TestReopen:
         make_member(project.id, dev_user.id, dev_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(dev_user),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Owner rejects
         client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "nah"},
             headers=auth_header(owner),
         )
 
         # Dev tries to reopen — should fail
         resp = client.post(
-            _propose_url(project.id, propose_id) + "/reopen",
+            _proposal_url(project.id, proposal_id) + "/reopen",
             headers=auth_header(dev_user),
         )
         assert resp.status_code == 403
@@ -466,7 +474,7 @@ class TestReopen:
 # ===========================================================================
 
 class TestFeatTaskIdProtection:
-    """P6.5 — feat_task_id is server-side only, cannot be set by client."""
+    """feat_task_id is server-side only, cannot be set by client."""
 
     def test_update_cannot_set_feat_task_id(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
@@ -477,13 +485,13 @@ class TestFeatTaskIdProtection:
         make_member(project.id, user.id, dev_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(user),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(user),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Try to set feat_task_id via PATCH
         resp = client.patch(
-            _propose_url(project.id, propose_id),
+            _proposal_url(project.id, proposal_id),
             json={"feat_task_id": "999"},
             headers=auth_header(user),
         )
@@ -497,9 +505,9 @@ class TestFeatTaskIdProtection:
 # ===========================================================================
 
 class TestEditRestrictions:
-    """Propose editing is only allowed in open status."""
+    """Proposal editing is only allowed in open status."""
 
-    def test_edit_accepted_propose_fails(
+    def test_edit_accepted_proposal_fails(
         self, client, db, make_user, make_project, make_milestone, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -510,27 +518,27 @@ class TestEditRestrictions:
         ms = make_milestone(project.id, mgr.id, status=MilestoneStatus.OPEN)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Accept
         client.post(
-            _propose_url(project.id, propose_id) + "/accept",
+            _proposal_url(project.id, proposal_id) + "/accept",
             json={"milestone_id": ms.id},
             headers=auth_header(mgr),
         )
 
         # Try to edit
         resp = client.patch(
-            _propose_url(project.id, propose_id),
+            _proposal_url(project.id, proposal_id),
             json={"title": "Changed"},
             headers=auth_header(mgr),
         )
         assert resp.status_code == 400
         assert "open" in resp.json()["detail"].lower()
 
-    def test_edit_rejected_propose_fails(
+    def test_edit_rejected_proposal_fails(
         self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
     ):
         admin_role, mgr_role, dev_role = seed_roles_and_permissions
@@ -539,21 +547,79 @@ class TestEditRestrictions:
         make_member(project.id, mgr.id, mgr_role.id)
 
         create_resp = client.post(
-            _propose_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
+            _proposal_url(project.id), json={"title": "F"}, headers=auth_header(mgr),
         )
-        propose_id = create_resp.json()["id"]
+        proposal_id = create_resp.json()["id"]
 
         # Reject
         client.post(
-            _propose_url(project.id, propose_id) + "/reject",
+            _proposal_url(project.id, proposal_id) + "/reject",
             json={"reason": "no"},
             headers=auth_header(mgr),
         )
 
         # Try to edit
         resp = client.patch(
-            _propose_url(project.id, propose_id),
+            _proposal_url(project.id, proposal_id),
             json={"title": "Changed"},
             headers=auth_header(mgr),
         )
         assert resp.status_code == 400
+
+
+# ===========================================================================
+# Legacy /proposes endpoint backward compatibility
+# ===========================================================================
+
+class TestLegacyProposeEndpoint:
+    """Verify the old /proposes URL still works."""
+
+    def test_legacy_create_and_list(
+        self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
+    ):
+        admin_role, mgr_role, dev_role = seed_roles_and_permissions
+        user = make_user()
+        project = make_project(owner_id=user.id, project_code="LEG")
+        make_member(project.id, user.id, dev_role.id)
+
+        # Create via legacy endpoint
+        resp = client.post(
+            _legacy_propose_url(project.id),
+            json={"title": "Legacy Proposal"},
+            headers=auth_header(user),
+        )
+        assert resp.status_code == 201
+        assert resp.json()["title"] == "Legacy Proposal"
+
+        # List via legacy endpoint
+        resp = client.get(_legacy_propose_url(project.id), headers=auth_header(user))
+        assert resp.status_code == 200
+        assert len(resp.json()) >= 1
+
+    def test_legacy_get_and_update(
+        self, client, db, make_user, make_project, seed_roles_and_permissions, make_member, auth_header,
+    ):
+        admin_role, mgr_role, dev_role = seed_roles_and_permissions
+        user = make_user()
+        project = make_project(owner_id=user.id)
+        make_member(project.id, user.id, dev_role.id)
+
+        # Create via new endpoint
+        create_resp = client.post(
+            _proposal_url(project.id), json={"title": "Cross"}, headers=auth_header(user),
+        )
+        pid = create_resp.json()["id"]
+
+        # Get via legacy
+        resp = client.get(_legacy_propose_url(project.id, pid), headers=auth_header(user))
+        assert resp.status_code == 200
+        assert resp.json()["title"] == "Cross"
+
+        # Update via legacy
+        resp = client.patch(
+            _legacy_propose_url(project.id, pid),
+            json={"title": "Updated Cross"},
+            headers=auth_header(user),
+        )
+        assert resp.status_code == 200
+        assert resp.json()["title"] == "Updated Cross"