ABI Layer 2: prove ISU short-program well-formedness — flagship Idris2 proof#41
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Flagship semantic proof: a figure-skating program is WellFormed iff its element count is within the ISU short-program limit (<= 7). Decidable proposition (propositional LTE), sound+complete Dec, certifier soundness, positive control + negative control (an 8-element program is provably rejected). Verified with idris2 0.7.0 (build clean, zero warnings) + adversarial false-proof rejection. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
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Summary
Raises anvomidaviser's Idris2 ABI to Layer 2 with its first flagship semantic proof. anvomidaviser's headline is converting ISU notation to formal figure-skating programs; the canonical structural rule is the short-program element-count limit. This proves
WellFormed— at most 7 elements — as a decidable proposition, so a conforming program is provably valid and an over-length one is provably rejected.Mirrors the estate flagship-proof pattern: program model, decidable
WellFormed(propositionalLTE), sound+completeDec, certifier proven sound, positive + negative controls.Changes
src/interface/abi/Anvomidaviser/ABI/Semantics.idr—SkateElement/Program,WellFormed/decWellFormed,certifyProgramSound, positive control + negative control (overRejected).anvomidaviser-abi.ipkg.RSR Quality Checklist
Required
As Applicable
Testing
Verified with Idris2 0.7.0:
idris2 --build anvomidaviser-abi.ipkg→ exit 0, zero warnings. Adversarial check: a deliberately-false proof (accepting an 8-element program) was rejected.build/removed.🤖 Generated with Claude Code
https://claude.ai/code/session_01A6PSzJWpRxtzGDjUCEh7Mx
Generated by Claude Code