v0.5 Exact Census Report

Within the three-stage strategy defined in document 21, Gate A (delta-only base verifier) and Gate B (twist JSON parser diff) are truly executed here, yielding precise numbers—the content of this page is located in the suite's results/ directory rather than docs/, making it one of the few documents in this series without a docs/NN number, but it belongs to actual research output rather than intermediate scaffolding, so it is still included separately. The document first reveals a provenance detail: the OLD twist JSON was actually frozen before the OLD base file (originating from an earlier generator commit), resulting in 1355 OLD base curves having no corresponding twist entries; the document explicitly points out that this is an "archived output artifact," not a fresh end-to-end execution on the OLD source tree. Core precise results: base curves are old=40,749, new=36,687, removed=4,062, added=0; Algorithm 1 failure classification ISOGENY_ONLY=1,353, A3_ONLY=2,707, BOTH=2, UNEXPLAINED=0 (individual: 3-isogeny 1,233, 5-isogeny 115, 7-isogeny 7); the precise change for Algorithm 2 in the stable-domain is a pure reduction of removed=21,306, added=0, with curve-level classification UNCHANGED=31,250, SHRINK_ONLY=5,437, EXPAND_ONLY=0, MIXED=0; global twist accounting identity 46,091=46,091 exact PASS. All 26 items on the completion gate checklist are true.