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Recover and compare bounded ARM64 state transitions - #5
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An edited function can return the right value while silently losing a state update. Rewynth now recovers and compares the return plus every word of an explicitly declared, bounded state buffer. The workbench and CLI support editable transition JSON, complete counterexamples, exact 64-bit tracing, workspace restoration and portable pure-transition C export.
The included lesson uses the unchanged PCG32 routine from pinned, attributed upstream source. A deleted-store control keeps its immediate return but fails the joint state comparison. Scope is one pointer to 1–3 fixed 64-bit words with at most four logical inputs; unsupported addressing and stateful inversion refuse explicitly.
Validation: a frozen local gate matched 37 states across 74 native calls; 28 new checks and 91 distinct data regressions passed; independent review exercised 16 product checks and 30 states across five generated C exports. Actual desktop/mobile workflows and an isolated installed-wheel lesson passed. Wheel and sdist contents match the frozen source. These checks establish the documented bounded model and finite examples, not general binary equivalence or an upstream PCG bug.