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Drew T
c7772bc452
R30/R16: the context-dependent artifacts, written while the context is live.
cookbook §51 — the SILENT SKIP: the bug class, why the byte-gate cannot see it, the
over-approximating-detector method, and FOUR LAWS:
1. Derive, don't re-derive — the best outcome is a DELETED SCANNER (28 findings -> one
derived oracle + ~10 deleted scanners). A derived fact cannot rot; a hand-maintained
copy of it is a liability that grows with every structural change.
2. Assert your COVERAGE, not merely your correctness. *** A LOUD FAILURE THAT NOBODY
COUNTS IS EXACTLY AS INVISIBLE AS A SILENT ONE *** — build_engine_types printed
'[overlap] handle manually' every single time for four phases while dead on 81% of its
own corpus. This CORRECTS the first draft of R32 ('fail loud'), which was not enough.
3. When an oracle is structurally blind to a class of error, add a SECOND ORACLE THAT CAN
DISAGREE WITH IT — not a better assertion inside it. We had two all along and never made
them argue. (And scope the comparison to where the second oracle is genuinely independent:
the same check run outside its domain reports 914 slices when the truth is 193.)
4. A rule that needs a human to remember it is not a gate. Make it structural.
+ the FALSE-WALL PIPELINE (a silent skip -> a wasted draft -> a backlog 'matching failure'
-> reserved_walls() PERMANENTLY blacklists a function that was never attempted), and a
checklist for any new corpus-scanning tool.
CURRENT_PHASE: session-9 handoff — what is done, what remains (each with its spec on disk),
and the R32-corrected / R33 / R34-new rule candidates for P10 ratification.