refactor(tools): search_projects uses shared score_project_match helper

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/fabledassistant/services/tools/projects.py

@@ -135,20 +135,12 @@ async def update_project_tool(*, user_id, arguments, **_ctx):
     briefing=True,
 )
 async def search_projects_tool(*, user_id, arguments, **_ctx):
-    from difflib import SequenceMatcher
-
     from fabledassistant.services.projects import list_projects
+    from fabledassistant.services.tools._helpers import score_project_match
 
-    query = str(arguments.get("query", "")).lower()
+    query = str(arguments.get("query", ""))
     projects = await list_projects(user_id)
-    scored: list[tuple[float, object]] = []
-    for p in projects:
-        combined = f"{p.title} {p.description or ''} {p.auto_summary or ''}".lower()
-        base_score = SequenceMatcher(None, query, combined).ratio()
-        query_words = set(query.split())
-        overlap = sum(1 for w in query_words if w in combined)
-        score = base_score + overlap * 0.05
-        scored.append((score, p))
+    scored: list[tuple[float, object]] = [(score_project_match(query, p), p) for p in projects]
     scored.sort(key=lambda x: x[0], reverse=True)
     results = []
     for score, p in scored[:5]:

tests/test_tool_use_fixes.py

@@ -87,3 +87,25 @@ def test_score_project_match_empty_query_returns_zero():
     from fabledassistant.services.tools._helpers import score_project_match
     p = _project(5, "Famous-Supply Work topics")
     assert score_project_match("", p) == 0.0
+
+
+@pytest.mark.asyncio
+async def test_search_projects_tool_ranks_substring_match_above_others():
+    """Substring hits (score 0.85) must rank above SequenceMatcher misses
+    for unrelated projects."""
+    from fabledassistant.services.tools import projects as projects_tool
+
+    fake_projects = [
+        _project(12, "Minstrel", auto_summary="self-hosted music server"),
+        _project(5, "Famous-Supply Work topics", auto_summary="AT&T fiber circuit"),
+        _project(13, "ImageRepo", auto_summary="self-hosted Flask app"),
+    ]
+
+    with patch.object(projects_tool, "list_projects", new=AsyncMock(return_value=fake_projects)):
+        result = await projects_tool.search_projects_tool(
+            user_id=1, arguments={"query": "famous supply project"},
+        )
+
+    top = result["data"]["projects"][0]
+    assert top["id"] == 5, f"expected Famous-Supply to rank first, got {top}"
+    assert top["score"] >= 0.85