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docs: point-source gradient probe status flip (phase 5 of #657) - #123
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…jvp (phase 5 of #657) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Summary
Phase-5 companion (#657; library PR linked below): the point-source gradient probe's documented all-zeros finding flips on the production path. The probe prose now records the implicit-diff
custom_jvpand the expected per-row pattern: steps 1–3 (hand-built closures over raw arrays) remain all-zero BY DESIGN — they bypass model registration and exercise the compatibility gate's unregistered fallback — while the fullFitness.callpipeline is PASS with non-zero gradients (measured: grad norm 17096). The regression guard is the full-pipeline row; a flip of that row back to all-zero means the implicit rule was disconnected. Also points at the workspace_test staircase-aware FD certification.Scripts Changed
jax_profiling/gradient/point_source/image_plane.py— "Finding" docstring section rewritten for the phase-5 status flip (expected per-step pattern + inverted full-pipeline guard); no code changes.Upstream PR
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