ABI Layer 2: prove K9 config-contract validation — flagship Idris2 proof#46
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New module K9iser.ABI.Semantics proves the repo's headline property
("Wrap configs into self-validating K9 contracts"): a config that
SATISFIES a "must"-contract (a required key present whose value lies
within an inclusive numeric range) provably validates, and a config that
VIOLATES it (missing key OR out-of-range value) provably does not.
- Faithful model: Config = assoc list (Key, Nat); Contract = key + [lo,hi].
- Headline proposition `Validates c cfg` has constructors only for the
satisfying case (resolver equation + InRange via propositional LTE);
no constructor exists for a missing key or out-of-range value.
- Sound + complete `decValidates : Dec (Validates c cfg)` and `decInRange`.
- Certifier `certify` into the ABI Result code, with `certifySound` and
`certifyComplete`.
- Positive control `goodValidates` (replicas=5 in [1,10]) and two negative
controls: `badRangeNotValidates` (replicas=0) and `missingNotValidates`.
ABI builds clean (exit 0, zero warnings). A deliberately false witness
for the out-of-range config is rejected by idris2 (non-vacuity verified).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
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Summary
Raises k9iser's Idris2 ABI to Layer 2 with its first flagship semantic proof. k9iser's headline is wrapping configs into self-validating K9 contracts; this proves a config validates against its contract iff its constraints hold (e.g. a value within range), with a sound+complete
Decand a certifier proven faithful. A violating config provably does not validate.Mirrors the estate flagship-proof pattern: faithful config/contract model, sound+complete
Dec, certifier proven sound, positive + negative controls.Changes
src/interface/abi/K9iser/ABI/Semantics.idr—InRange/Validatespropositions, sound+complete decisions,certify/certifySound, positive + negative controls.k9iser-abi.ipkg.RSR Quality Checklist
Required
As Applicable
Testing
Verified with Idris2 0.7.0:
idris2 --build k9iser-abi.ipkg→ exit 0, zero warnings. Adversarial check: a deliberately-false proof was rejected.build/removed.🤖 Generated with Claude Code
https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
Generated by Claude Code