1 files changed, 28 insertions, 0 deletions
diff --git a/.ai/scripts/tests/test_route_recommend.py b/.ai/scripts/tests/test_route_recommend.py
index acc4755..2ec900a 100644
--- a/.ai/scripts/tests/test_route_recommend.py
+++ b/.ai/scripts/tests/test_route_recommend.py
@@ -122,3 +122,31 @@ def test_cli_exclude_drops_current_project(tmp_path):
     r = _run(["--exclude", "foo"], roots=[tmp_path / "projects"], item="fix the foo widget")
     assert r.returncode == 0
     assert r.stdout.strip() == "none"
+
+
+# ----------------------------------------------------------------------
+# Duplicate candidate names
+#
+# Projects are collapsed to bare basenames, so two projects sharing a basename
+# across roots (~/code/notes and ~/projects/notes) appear twice in the candidate
+# list. Both literal-match, recommend read len(strong) > 1 as an ambiguous tie,
+# and a correct strong match was downgraded to weak. Latent when discovered
+# 2026-07-24 (27 projects, 27 distinct basenames) but real.
+# ----------------------------------------------------------------------
+
+def test_duplicate_candidate_name_keeps_strong_confidence():
+    assert rr.recommend("fix the notes thing", ["notes", "other"]) == ("notes", "strong")
+    # The same name twice must not read as a tie.
+    assert rr.recommend("fix the notes thing", ["notes", "notes", "other"]) == ("notes", "strong")
+
+
+def test_genuine_ambiguity_still_downgrades():
+    # Two DIFFERENT projects both matching is a real tie and stays weak — the
+    # dedupe must collapse identical names only, never real ambiguity.
+    dest, conf = rr.recommend("notes and other both", ["notes", "other"])
+    assert conf == "weak"
+
+
+def test_duplicates_do_not_change_the_chosen_destination():
+    dest, _ = rr.recommend("fix the notes thing", ["notes", "notes"])
+    assert dest == "notes"