[bitplane]

Compose Cinna Davis’s helper-7 private descent reuse (PR #2219) with David Arias’s actual coalesced P104 word (PR #2152), closing the variant explicitly left untested there. Bind every retained scalar event and chart to its original index, replace the three deliveries using the existing owned query, and pay a rank-9 final transport to preserve all 735 public boundary contracts.

The complete word has profile delta +H9 − H2 − H7, unchanged rank mass 5894 and nine fewer scalar additions. Its fractional moment improves strictly. Replaying all 75,888 inherited owner assignments gives a conditional κ upper ceiling of approximately 0.00165270058587, still 1.1933% below the selected value. No global supplier or new exponent is claimed; backward orientation, native global wrappers and recursive precision/reserves remain open.

Validation: registered CPython 3.12 replay with assertions disabled; exact 735-column identity and chronological frames; 3,625 native transports, 2,942 distinct recipes, 208 endpoint adapters and 4,096 private-path Gaussian columns; ten algebra/source/invoice rejection controls plus a wrong-phase control. A read-only, Git-free CPython 3.14 replay reproduced the full receipt without changing any exported file. The minimal predecessor closure and all 13 live inputs are pinned; existing frozen packages are unchanged.

Only research/p104-coalesced-private-reuse/ is added. Source commits, attribution, full pricing, reproduction commands and remaining questions are in its README, TASK and receipt. Fresh canonical-main and live overlap checks covered 521 open PRs and 1,016 Discussion records with complete pagination and no warnings.

Coordination: #2299. Prepared by Gareth Davidson / @bitplane with substantial OpenAI Codex assistance; predecessor authors retain credit.