ABI Layer 3: compositional sidecar isolation (write-effect monoid homomorphism)#176
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Add Verisimiser.ABI.Invariants, a second, deeper machine-checked theorem over the existing Octad model (distinct from the Layer-2 Octad<->Fin 8 bijection). Models the write effect of an augmentation *pipeline* as a join over a two-point lattice (ReadOnly <= Writes, Writes absorbing) and proves: - effectHomomorphism: pipelineEffect is a monoid homomorphism from list append to joinE (with joinAssoc / identity laws). - tier1PipelineReadOnly (CLOSURE): any pipeline of only Tier-1 dimensions is read-only -- isolation is preserved under composition (reuses Layer-2 tier1NeverWritesTarget). - writerContaminates (CONTAMINATION) + appendMonotone (MONOTONICITY): one target-writing step taints the whole pipeline. - decReadOnly: sound + complete decision procedure. - Positive control (readPathIsReadOnly) + negative controls (overlayNotReadOnly, decOverlayIsNo, effectsDistinct). No believe_me/postulate/assert_total/etc. Builds with zero warnings; adversarial false-proof rejected. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
Signed-off-by: Jonathan D.A. Jewell <6759885+hyperpolymath@users.noreply.github.com>
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Summary
Layer 3 (second, deeper invariant): models a pipeline's write effect as a join over a two-point lattice and proves
pipelineEffectis a monoid homomorphism from list-append. The central closure theorem shows any pipeline of only Tier-1 dimensions stays read-only (isolation preserved under composition); dual contamination/monotonicity laws show one target-writing step taints the whole pipeline. Distinct from and deeper than the Layer-2 Octad↔Fin 8 bijection.New module
Verisimiser.ABI.Invariants(imports the Layer-2Octadmodel).Testing
Idris2 0.7.0
--build→ exit 0, zero warnings (6 modules). Adversarial rejection confirmed.build/removed. Nobelieve_me/postulate/sorry.🤖 Generated with Claude Code
https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
Generated by Claude Code