gradient README: O(M×N) caveat resolved (#376) + branch-flip findings (#377)#91
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…nch-flip findings (#377) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Summary
Docs leg of PyAutoLabs/PyAutoArray#376 (chunked kernel forward) and PyAutoLabs/PyAutoArray#377 (branch-flip investigation): the gradient README's kernel-mesh caveat (a) is marked resolved with the measured numbers (60 GB OOM → 1.06 GB peak at M≈246k × N≈15.4k; CPU ~10 min/eval is arithmetic, not blocking), and caveat (b) is corrected per the investigation — the flips are JIT-only, the positive-only solver is exonerated, and the linear rank-CDF's 1/(N+1) bounding-box-edge discontinuity is a confirmed amplifier (fix candidate on #377).
Test Plan
Validation checklist (--auto run)
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