R12 S5.2 Learned Generator-Factored Executor Preregistration

Status: frozen after the scoreless S5.1 corpus-gate failure and before one replacement seed, fit, model load, or score.

S5.2 imports every architecture, training, control, evaluation, gate, and claim boundary byte from R12_S5_LEARNED_GENERATOR_PREREG.md and the corrected sealed data policy from R12_S5_LEARNED_GENERATOR_PREREG_V1_1.md.

Seed 7741142465189679834 is retired because 4/2,048 generated rows reused a public roster token multiset. It had zero model, fit, development-score, and confirmation access. No threshold or mechanism changes are authorized.

After this receipt is committed, draw exactly one replacement seed and run the same deterministic 512-group builder against the same source/public/development exclusions. Never open prior confirmation bytes. The board must pass every existing gate before the sole matched fit and serial H100 evaluation. Failure closes S5.2; passing uses the original frozen assessor without repair or rescore.

Frozen Development Board

Replacement seed 1639560669058669827 yields 2,048 rows / 512 groups over depths three through eight, with maximum length 345 tokens. Every corpus gate passes, including zero exact-prompt, 13-gram, factor, nonce-name, and roster token-multiset overlap against the admitted source/public/development inputs. Confirmation access is zero. Development data SHA-256 is 5d58f97f6763ac4b6550b4b2aeb959993537c185994b0ed49ac4b102c568582f; report SHA-256 is 7e667a519f7cb7f3462edd51f75279bfc66260a34baa7414f06424be6cd71dd9. Both Newton and local copies are read-only. Commit this receipt and aggregate report before the sole fit/evaluation job; no further seed or board is allowed.