S8 carried a false mutation claim. It said flipping `is_none_or` to
`is_some_and` at the constant-tempo check killed no test; three tests
kill it — two in graph_reduction, one in convergence reporting the
witness verbatim. Executed and restored by hand. The original was
reached by reading only invariants.rs's own tests, which assert
`fires(...)` and survive the flip; the kill sites live in another crate.
The genuinely unconstructed spelling is the opposite one: `Constant`
with `Some(equal)` has no construction site anywhere.
S8's ratification also stops presenting normalize-on-encode as the
default. Folding one of two accepted byte forms violates
req:binfmt:decode-vectors' injectivity rule, and
req:binfmt:compression-none-parameter is the ratified precedent for
refusing exactly that leniency. A repair must reject one spelling or
keep both as distinct canonical values.
S16 had drifted in every code citation, some by hundreds of lines, and
never named what makes its fix expensive: t8b_both_permitted_stale_forms_hold
pins both stale forms as passing and documents disposition A's rules as
mutations that must break it. The fix is the mutation an existing test
exists to detect.
S25 files disposition B of S22 — corpus rows named for their variant.
Complementary, not a replacement: it reaches other implementations, but
its failure still reads as corpus staleness.
S26 files a doc comment claiming a core_spec repair that never landed.
A P13-S9 instance, and the sharpest: the side that is wrong about the
other is the grep-guarded side. Its evidence must not be repaired alone.
Locators only in this commit; no code, no spec, no contract.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QjsEnYhm1gPpf6ii2iFxFV
Levi Neuwirth
f90a5b1c29