fix(miner): use token-boundary matching in detect_room

Substring checks in path/filename routing caused systemic misrouting
in large monorepos — e.g., "views" ⊂ "interviews" sent every file
under views/ to the interviews room. Switch to separator-bounded
token matching (-, _, ., /) via a _name_matches helper, applied to
priority 1 (path parts) and priority 2 (filename).

tests/test_miner.py

@@ -7,7 +7,7 @@ from pathlib import Path
 import chromadb
 import yaml
 
-from mempalace.miner import load_config, mine, scan_project, status
+from mempalace.miner import detect_room, load_config, mine, scan_project, status
 from mempalace.palace import NORMALIZE_VERSION, file_already_mined
 
 
@@ -491,6 +491,103 @@ def test_file_already_mined_returns_false_for_stale_normalize_version():
         shutil.rmtree(tmpdir, ignore_errors=True)
 
 
+def test_detect_room_uses_token_boundary_matching(tmp_path):
+    """Path-part routing must not fire on incidental substrings.
+
+    Regression: "views" is a substring of "interviews", so the old
+    substring check routed every file under views/ into a room keyed
+    by "interviews". Token-boundary matching prevents this while still
+    matching real tokens like "frontend" in "frontend-app".
+    """
+    project = tmp_path
+    rooms = [
+        {"name": "billing-page", "keywords": ["billing-page"]},
+        {"name": "interviews", "keywords": ["interviews"]},
+        {"name": "general", "keywords": []},
+    ]
+
+    # views/<X>/... must NOT route to "interviews" on the "views"⊂"interviews" accident
+    view_file = project / "views" / "billing-page" / "Foo.test.tsx"
+    view_file.parent.mkdir(parents=True)
+    view_file.write_text("content")
+    assert detect_room(view_file, "content", rooms, project) == "billing-page"
+
+    # data/interviews/... must route to "interviews" via the real token
+    data_file = project / "data" / "interviews" / "index.ts"
+    data_file.parent.mkdir(parents=True)
+    data_file.write_text("content")
+    assert detect_room(data_file, "content", rooms, project) == "interviews"
+
+
+def test_detect_room_preserves_token_matches(tmp_path):
+    """Real separator-bounded tokens still match in both directions."""
+    project = tmp_path
+    rooms = [
+        {"name": "frontend", "keywords": ["frontend"]},
+        {"name": "general", "keywords": []},
+    ]
+
+    # path part contains keyword as a token
+    f1 = project / "frontend-app" / "main.ts"
+    f1.parent.mkdir(parents=True)
+    f1.write_text("x")
+    assert detect_room(f1, "x", rooms, project) == "frontend"
+
+    # keyword contains path part as a token (reverse direction)
+    rooms2 = [
+        {"name": "data-retention", "keywords": ["data-retention"]},
+        {"name": "general", "keywords": []},
+    ]
+    f2 = project / "data" / "data-retention" / "policy.ts"
+    f2.parent.mkdir(parents=True)
+    f2.write_text("x")
+    assert detect_room(f2, "x", rooms2, project) == "data-retention"
+
+
+def test_detect_room_matches_keyword_distinct_from_name(tmp_path):
+    """Regression: PR #145 — path part must match a keyword even when the
+    room name itself doesn't contain the path part as a token.
+
+    Scenario: a folder named ``docs/`` should route to a room named
+    ``documentation`` that declares ``"docs"`` as a keyword.
+    """
+    project = tmp_path
+    rooms = [
+        {"name": "documentation", "keywords": ["docs"]},
+        {"name": "general", "keywords": []},
+    ]
+
+    f = project / "docs" / "readme.md"
+    f.parent.mkdir(parents=True)
+    f.write_text("x")
+    assert detect_room(f, "x", rooms, project) == "documentation"
+
+
+def test_detect_room_filename_match_uses_token_boundary(tmp_path):
+    """Priority 2 (filename match) must also use token-boundary rules."""
+    project = tmp_path
+    rooms = [
+        {"name": "review", "keywords": []},
+        {"name": "general", "keywords": []},
+    ]
+
+    # "review" is a substring of "reviewmodule" but not a token — should NOT match
+    f1 = project / "reviewmodule.ts"
+    f1.write_text("x")
+    assert detect_room(f1, "x", rooms, project) != "review"
+
+    # "review" IS a token of "review-page" — should match
+    f2 = project / "review-page.ts"
+    f2.write_text("x")
+    assert detect_room(f2, "x", rooms, project) == "review"
+
+    # Dotted filename stems like "Foo.test" split on "." too
+    rooms3 = [{"name": "foo", "keywords": []}, {"name": "general", "keywords": []}]
+    f3 = project / "foo.test.ts"
+    f3.write_text("x")
+    assert detect_room(f3, "x", rooms3, project) == "foo"
+
+
 def test_add_drawer_stamps_normalize_version(tmp_path):
     """Fresh drawers carry the current schema version so future upgrades work."""
     from mempalace.miner import add_drawer