feat(prior-art): edit-time record-sync nudge — the sync class (#2708)

A snippet recorded AT the exact file being edited is not a reuse
suggestion — it IS the record of the file being changed. The write-path
hint now renders those as their own SYNC class: 'snippet #N records this
file — updating the record is part of the edit (update_snippet /
verify_snippet)'. Nearby and semantic hits stay the reuse menu.

The two classes dedup on separate per-session channels (exclude_ids vs
exclude_sync_ids, .ids vs .sync.ids in the hook), so a reuse hint shown
early in a session can no longer silence the record-sync nudge when the
recorded file itself is edited later. Sync surfacing is measured under
its own note_usage source (write_path_sync) — its pull-through rate is
the scoreboard for whether edit-time sync actually happens, per decision
#2707 (no forge connection; records stay current in the session that has
the context). Plugin 0.1.31.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_write_path_trigger.py

@@ -101,12 +101,14 @@ async def test_nothing_recorded_is_silent():
     assert out["context"] == "" and out["note_ids"] == []
 
 
-# --- arm 1: by place ---------------------------------------------------------
+# --- the sync class, and arm 1 by place --------------------------------------
 
 @pytest.mark.asyncio
-async def test_snippet_at_this_path_is_surfaced_without_a_score():
-    """A snippet recorded HERE is prior art by definition, not by resemblance —
-    it must not be subject to the similarity threshold."""
+async def test_snippet_at_this_path_becomes_the_sync_nudge():
+    """A snippet recorded AT the exact file is not a reuse suggestion — it IS
+    the record of the file being edited (#2708). It surfaces without a score,
+    framed as "updating the record is part of this edit", and is reported in
+    sync_note_ids so the hook feeds the sync dedup channel."""
     from scribe.services import plugin_context as pc
     with patch.object(pc, "get_writepath_config", AsyncMock(return_value=_cfg())), \
          patch.object(pc.snippets_svc, "list_snippets",
@@ -116,11 +118,59 @@ async def test_snippet_at_this_path_is_surfaced_without_a_score():
          patch.object(pc, "owner_names_for", AsyncMock(return_value={})):
         out = await pc.build_write_path_hint(1, "src/x.py", code=REAL_CODE)
     assert out["note_ids"] == [12]
-    assert '#12 [here] "debounce — rate-limit a callback"' in out["context"]
-    assert "get_snippet(id)" in out["context"]
+    assert out["sync_note_ids"] == [12]
+    assert '#12 [records this file] "debounce — rate-limit a callback"' in out["context"]
+    # The load-bearing sentence: the record's freshness belongs to this edit.
+    assert "update_snippet" in out["context"]
+    assert "verify_snippet" in out["context"]
     assert "src/x.py" in out["context"]
 
 
+@pytest.mark.asyncio
+async def test_reuse_dedup_never_suppresses_the_sync_nudge():
+    """THE bug #2708 names: a title surfaced as a reuse hint twenty turns ago
+    landed in exclude_ids — and then silenced "you are editing the recorded
+    file right now", the one claim that must fire at the moment of change. The
+    sync class dedups only against its own channel."""
+    from scribe.services import plugin_context as pc
+    search = AsyncMock(return_value=[])
+    with patch.object(pc, "get_writepath_config", AsyncMock(return_value=_cfg())), \
+         patch.object(pc.snippets_svc, "list_snippets",
+                      AsyncMock(return_value=([_snippet_item(12, "seen as reuse already")], 1))), \
+         patch.object(pc, "semantic_search_notes", search), \
+         patch.object(pc, "record_retrieval", MagicMock()), \
+         patch.object(pc, "owner_names_for", AsyncMock(return_value={})):
+        out = await pc.build_write_path_hint(
+            1, "src/x.py", code=REAL_CODE, exclude_ids=[12],
+        )
+    assert out["sync_note_ids"] == [12]
+    assert "[records this file]" in out["context"]
+
+
+@pytest.mark.asyncio
+async def test_sync_dedup_silences_a_sync_nudge_already_shown():
+    """Once the session has been told "snippet #12 records this file", every
+    further edit of the same file stays quiet about it — on every arm: the
+    directory query and the semantic arm would both re-surface it otherwise."""
+    from scribe.services import plugin_context as pc
+
+    async def _listing(uid, **kw):
+        # Recorded at the exact file, so it matches the file AND dir queries.
+        return ([_snippet_item(12, "already nudged")], 1)
+
+    search = AsyncMock(return_value=[])
+    with patch.object(pc, "get_writepath_config", AsyncMock(return_value=_cfg())), \
+         patch.object(pc.snippets_svc, "list_snippets", _listing), \
+         patch.object(pc, "semantic_search_notes", search), \
+         patch.object(pc, "record_retrieval", MagicMock()):
+        out = await pc.build_write_path_hint(
+            1, "src/x.py", code=REAL_CODE, exclude_sync_ids=[12],
+        )
+    assert out["note_ids"] == [] and out["sync_note_ids"] == []
+    assert "#12" not in out["context"]
+    assert 12 in search.await_args.kwargs["exclude_ids"]
+
+
 @pytest.mark.asyncio
 async def test_directory_is_only_consulted_when_the_file_leaves_room():
     from scribe.services import plugin_context as pc
@@ -267,16 +317,24 @@ async def test_semantic_arm_only_asks_for_the_budget_the_place_arm_left():
 
 
 @pytest.mark.asyncio
-async def test_session_dedup_excludes_ids_from_both_arms():
+async def test_session_dedup_excludes_ids_from_the_reuse_arms():
+    """exclude_ids governs the REUSE classes — nearby and semantic. (The sync
+    class has its own channel; see the tests above.)"""
     from scribe.services import plugin_context as pc
+
+    async def _listing(uid, **kw):
+        # Recorded at a SIBLING file, so it reaches only the directory query.
+        if kw["path"] == "src":
+            return ([_snippet_item(12, "already shown")], 1)
+        return ([], 0)
+
     search = AsyncMock(return_value=[])
     with patch.object(pc, "get_writepath_config", AsyncMock(return_value=_cfg())), \
-         patch.object(pc.snippets_svc, "list_snippets",
-                      AsyncMock(return_value=([_snippet_item(12, "already shown")], 1))), \
+         patch.object(pc.snippets_svc, "list_snippets", _listing), \
          patch.object(pc, "semantic_search_notes", search), \
          patch.object(pc, "record_retrieval", MagicMock()):
         out = await pc.build_write_path_hint(1, "src/x.py", code=REAL_CODE, exclude_ids=[12])
-    # The location hit was already surfaced this session → dropped, not repeated.
+    # The nearby hit was already surfaced this session → dropped, not repeated.
     assert out["note_ids"] == []
     assert 12 in search.await_args.kwargs["exclude_ids"]
 
@@ -315,6 +373,33 @@ async def test_telemetry_uses_its_own_source():
     assert rec.call_args.kwargs["project_id"] == 4
 
 
+@pytest.mark.asyncio
+async def test_sync_surfacing_is_measured_under_its_own_usage_source():
+    """The sync class's pull-through rate is #2708's scoreboard — whether
+    sessions actually update the record when told they're editing it. Folding
+    it into write_path_place would make that unmeasurable."""
+    from scribe.services import plugin_context as pc
+
+    async def _listing(uid, **kw):
+        if kw["path"] == "src/x.py":
+            return ([_snippet_item(12, "records me")], 1)
+        return ([_snippet_item(9, "sibling")], 1)
+
+    surfaced = MagicMock()
+    with patch.object(pc, "get_writepath_config", AsyncMock(return_value=_cfg())), \
+         patch.object(pc.snippets_svc, "list_snippets", _listing), \
+         patch.object(pc, "semantic_search_notes", AsyncMock(return_value=[])), \
+         patch.object(pc, "record_retrieval", MagicMock()), \
+         patch.object(pc, "record_surfaced", surfaced), \
+         patch.object(pc, "owner_names_for", AsyncMock(return_value={})):
+        await pc.build_write_path_hint(1, "src/x.py", code=REAL_CODE)
+    by_source = {
+        c.kwargs["source"]: c.kwargs["note_ids"] for c in surfaced.call_args_list
+    }
+    assert by_source["write_path_sync"] == [12]
+    assert by_source["write_path_place"] == [9]
+
+
 @pytest.mark.asyncio
 async def test_config_has_its_own_switch_and_threshold_but_shares_top_k():
     from scribe.services import plugin_context as pc
@@ -693,11 +778,11 @@ def test_route_reads_every_arg_the_hook_sends():
 
     from scribe.routes import plugin as routes
     src = inspect.getsource(routes.write_path_prior_art)
-    for arg in ("path", "code", "repo", "project_id", "exclude_ids"):
+    for arg in ("path", "code", "repo", "project_id", "exclude_ids", "exclude_sync_ids"):
         assert f'request.args.get("{arg}"' in src, f"route ignores {arg}"
 
     hook = HOOK.read_text()
-    for arg in ("path=", "code=", "repo=", "exclude_ids="):
+    for arg in ("path=", "code=", "repo=", "exclude_ids=", "exclude_sync_ids="):
         assert arg in hook, f"hook never sends {arg}"
 
 
@@ -788,7 +873,21 @@ def test_plugin_version_bumped_with_the_hook():
     ship."""
     manifest = json.loads((PLUGIN / ".claude-plugin" / "plugin.json").read_text())
     version = tuple(int(p) for p in manifest["version"].split("."))
-    assert version >= (0, 1, 18)
+    assert version >= (0, 1, 31)
+
+
+def test_hook_keeps_sync_and_reuse_dedup_apart():
+    """#2708's dedup audit, pinned: the hook holds TWO per-session id files and
+    feeds each its own class — sync ids (snippets recording the edited file) to
+    the sync file, the rest to the reuse file. One shared file is exactly the
+    bug this replaced: a reuse hint early in the session silencing the record-
+    sync nudge when the recorded file is edited later."""
+    src = HOOK.read_text()
+    assert ".sync.ids" in src                       # its own state file
+    assert "exclude_sync_ids=" in src               # its own query channel
+    # The reuse file must NOT swallow sync ids — the write-back subtracts them.
+    assert "(.note_ids // []) - (.sync_note_ids // [])" in src
+    assert "(.sync_note_ids // [])[]?" in src
 
 
 def _hook_runtime_env():