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Certify the A1858 contraction's cleanup edit. - #4152
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Mister-Meeseeks merged 1 commit intoOct 20, 2026
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Mister-Meeseeks merged 1 commit into
Mister-Meeseeks merged 1 commit into
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Independently derive the one-ADD cleanup substitution and the surviving inverse order on the four frozen PR3998 words. No new kappa. Co-authored-by: unpaidmoon <unpaidmoon@users.noreply.github.com>
This was referenced Oct 20, 2026
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Change and mathematical scope
Partial audit, no new κ. On the four frozen PR #3998 words, the consecutive A1858 triple and its two-ADD image have the same exact rational matrix. An independent cleanup derivation reproduces each stored cleanup section. The contraction replaces one three-gate inverse block by the two-gate inverse of the image: one ADD is deleted and the two survivors exchange order. Forward and cleanup ADD counts each fall by one. The selected frontier is unchanged.
Task and overlap
Base
bb4bccbf42844d2801487450727c2f63e10d1d0f. Predecessor head389268a6b5e0373a3125d5c6fcd6995f4ea324f5(PR #3998). Cardindependent-moment, scope refined away from the #2979 rank-7 reconstruction.This is item 7 of the chronological open #1166 next-task list after dropping work delivered or refined by open PRs through #4149. The question is discussion comment 19035159: challenge the source-bound A1858 contraction and its cleanup. It is not PR #4019's separated seven-block contraction, which #4112 already accepts.
Validation
python3 scripts/research_package.py --package research/staged544-a1858-contraction-auditprintsPASS_A1858_CLEANUP_CONTRACTIONandPASS_REGISTERED_RESEARCH_PACKAGE ... outcome=partial. CPython 3.12, standard library only. Controls reject a wrong central sign, a reversed cleanup order, a helper ADD omitted from cleanup, and a target ADD inserted into cleanup.Not run: the frame-bill replay, native/owner/precision obligations, and any supplier moment.
Credit
Dataisfire (PR #3734), Dugongue (PR #3945), and Chris R / Clear1nsight (PR #3998 and comment 19035159). unpaidmoon, with substantial Cursor Grok assistance. Apache-2.0.
Open next questions
Recompute the successor climb of registers 456, 457 and 475 before treating the published histogram as unchanged. The second half of comment 19035159, carrying the scalar saving into the PR #3945 producer, remains open.