ABI Layer 2: prove scaffold conformance property — flagship Idris2 proof#73
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Add Iseriser.ABI.Semantics proving the headline domain property: a generated -iser scaffold is Conformant exactly when all five required components (Manifest, Idris2 ABI, Zig FFI, Codegen, Rust CLI) are present. Conformant is built from genuine Data.List.Elem membership obligations with no catch-all constructor, so a scaffold missing any component has no witness. Includes a sound+complete decConformant : (s) -> Dec (Conformant s), a soundness fact certifyConformantSound, a positive control (completeIsConformant via explicit Elem positions), and a negative control (ffiMissingNotConformant : Not (Conformant ffiMissing)). Non-vacuity confirmed: a deliberately-false Has Ffi witness for the FFI-missing scaffold is rejected by idris2. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
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Summary
Raises iseriser's Idris2 ABI to Layer 2 with its first flagship semantic proof. Iseriser's headline is the meta-framework that generates -iser projects; the correctness obligation is that a generated scaffold conforms to the standard structure. This proves
Conformant sholds exactly when all required components are present, so a scaffold missing one is provably notConformant.Mirrors the estate flagship-proof pattern: component model,
decConformant : Dec, certifier, positive + negative controls.Changes
src/interface/abi/Iseriser/ABI/Semantics.idr—Component/Scaffold/Has,Conformant,decHas/decConformant : Dec,certifyConformant, and negative controlffiMissingNotConformant : Not (Conformant ffiMissingScaffold)..ipkg.RSR Quality Checklist
Required
As Applicable
Testing
Verified with Idris2 0.7.0:
idris2 --build iseriser-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