The fallback composite gate in rank_titles flagged title P as a "play-all
wrapper" whenever some other title Q's clip set was a proper subset of P's,
Q had video, and Q.size >= 0.5 * P.size. main_feature_order then ranks
standalone-before-composite, demoting P below the decoy Q.
On a seamless-branch feature this inverts the pick: the real 00800 (2h03,
4 clips = body + intro/credits/seamless segments) is a SUPERSET of the
single-clip body decoy 00700 (1h50), and 700 >= 50% of 800's size, so 800
was mis-flagged composite and lost to the shorter 700 — the wrong title
gets ripped.
Add a duration-first wrapper-shape gate: P is only a composite when the
subset Q is EITHER a much shorter cut (Q.duration < 0.85 * P.duration, a
concat/play-all padding Q's runtime) OR nearly size-equal (Q.size >= 0.90 *
P.size, a bumper/outro wrapper). A near-full-length but markedly smaller
body subset (Q runs ~0.89 of P's duration yet holds far fewer bytes,
because P's branch segments add bytes not runtime) is a real seamless
branch, so P is kept. Uses per-title duration_secs/size_bytes, stays
capacity-independent and feature-gate-safe.
Preserves the real play-all avoidance: the 00245 bumper-wrapper decoy
(Q ~0.96 of both duration and size) stays demoted via the size limb, and
a concat play-all (subset < half the runtime) via the duration limb.
Add regression tests: seamless_branch_feature_not_demoted_issue_45 and
true_play_all_concat_wrapper_still_demoted. All existing selection tests
pass.
Matthew Jackson