Phrases yield only when both halves already rhyme

beast mode / sleep though / seats though: the though half rhyming
shouldn't suppress the phrase that carries the beast/sleep/seats half.
Pure-redundancy phrases (oh my over oh+my) still yield.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app.py

@@ -551,8 +551,13 @@ def analyze(draft: Draft):
     for p in phrases:
         if p["weak"]:
             continue
-        if any(s < p["end"] and p["start"] < e
-               for s, e in grouped_spans[p["line"]]):
+        # a phrase yields only when BOTH its halves already rhyme (pure
+        # redundancy); if one half is new, the phrase carries information
+        # (beast mode / sleep though: though already rhymes, beast doesn't)
+        spans = grouped_spans[p["line"]]
+        a_taken = any(s <= p["start"] < e for s, e in spans)
+        b_taken = any(s < p["end"] <= e for s, e in spans)
+        if a_taken and b_taken:
             continue
         vs = p["vowels"]
         if len(vs) >= 3 or (len(vs) == 2 and vs[1] not in REDUCED):

tests/test_rhymes.py

@@ -336,3 +336,14 @@ def test_schwa_phrase_needs_consonant_support():
     text = ("Looming over your shoulder, like a sloth hugs a tree,\n"
             "Thinking it won't fall, yet there it goes. Damn, it's free.")
     assert "sloth hugs" not in highlighted(text)
+
+
+def test_phrase_with_one_new_half_is_not_suppressed():
+    # though/mode already rhyme as words, but beast/sleep/seats only
+    # rhyme through the phrase pairs — those must survive
+    text = ("Look, I woke up in beast mode\n"
+            "With my girl, that's beauty and the beast though\n"
+            "Been top 5, these niggas sleep though\n"
+            "Only thing that sold out is the seats though")
+    group_with(text, "beast mode", "beast though", "sleep though",
+               "seats though")