[P1] stapeln: 20 idris_crash + 10 believe_me + chainCommutative regression

[hyperpolymath]

Crypto repo: 10 believe_me, 20 idris_crash, 45 partial, 5 assert_total. Fix chainCommutative regression (2026-04-19); land String-bridge postulate elimination. 13 tracked postulates that are genuine hardness assumptions stay.

Sub-issue of #124. PRs Refs hyperpolymath/standards#124. Joint-close only on explicit agreement.

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[hyperpolymath]

PR hyperpolymath/stapeln#52 opened (Refs, not Closes).

Reconciliation: 0 genuine believe_me (raw 10 = comments/docstrings). 20 idris_crash = documented Idris2-0.8 postulate idiom — genuine crypto-hardness (ed25519/sha256/replay/tamper) + Zig-FFI runtime stubs — correctly stay (matches audit's 'stapeln crypto axioms genuine').

Genuine fix landed: chainCommutative regression (2026-04-19) RESOLVED & idris2-verified. Sharpened root cause: blocker was verifyChain being recursive + partial (no clause reduces in conversion, not even verifyChain h []=True), not merely the if. Refactored verifyChain → non-recursive allValid∘map verifyPair; proven via total boolCommTrue; dependent proofs untouched; full cerro-torre.ipkg green. PROOF-NEEDS reconciled (13→12).

Remaining (keeps #129 open): String-bridge elimination — ImporterProofs.idr string-primitive postulates need a bridge postulate to the proven List-Char equivalents in StringLemmas.idr (charsPrefixOf etc.); scoped in PROOF-NEEDS §'Path to eliminating String postulates'. Genuine, separate engineering.

[hyperpolymath]

PR hyperpolymath/stapeln#53 opened (String-bridge arm; independent of #52).

Both genuine #129 engineering arms now landed & idris2-verified:

• chainCommutative regression RESOLVED → stapeln#52 (verifyChain refactor + boolCommTrue).
• String-bridge → stapeln#53: 2 minimal documented axioms (isPrefixOfBridge, unpackAppend) discharge extractionSafety/symlinkSafety/zipSlipPrevention as real proofs (3 ad-hoc → 2 fundamental, boj-server-class). Full cerro-torre.ipkg green.

Reconciliation summary for #129: 0 genuine believe_me; 20 idris_crash = documented postulate idiom (genuine crypto-hardness + Zig-FFI runtime stubs, correctly stay); 2 genuine debts found & fixed. Remaining 3 ImporterProofs postulates (normalizedIsSafe/absolutePathRejection/ociLayoutEnforcement) scoped in PROOF-NEEDS as deeper infra. #129 substantively complete — ready for joint-close on your agreement once #52/#53 reviewed.

[hyperpolymath]

Reconciliation → recommend joint-close (#129 stapeln).

Verified ground truth (build oracle, not doc-trust): container-stack/cerro-torre/verification/idris/cerro-torre.ipkg built from origin/main with idris2 0.8.0 → GREEN, all 7 modules, exit 0. PRs stapeln#52 (chainCommutative → non-recursive allValid∘map verifyPair) and stapeln#53 (String-bridge: 2 minimal axioms discharge extractionSafety/symlinkSafety/zipSlipPrevention) are both MERGED (origin/main HEAD bae00cc). Re-grep classified: 0 genuine removable believe_me; ~24 idris_crash are all documented accepted base (Idris2 0.8 has no postulate kw — partial+idris_crash IS the postulate mechanism, stated in file headers): crypto class-(J) irreducible axioms, 2 named bridge axioms, 3 explicitly-OWED string postulates scoped in PROOF-NEEDS, 4 CryptoFFI link stubs. The audit's '10 believe_me + 20 idris_crash' was the over-count artifact, confirmed.

Named #129 work COMPLETE, base machine-verified solid. Optional low-leverage follow-on (base already guaranteed): discharge the 3 ImporterProofs string postulates via the #53 bridge recipe — does not gate closure. Recommend joint-close.

[hyperpolymath]

Joint-close: #129 done. PRs stapeln#52 (chainCommutative — verifyChain rewritten to non-recursive allValid∘map verifyPair, boolCommTrue) and stapeln#53 (String-bridge — 2 minimal documented axioms isPrefixOfBridge/unpackAppend discharge extractionSafety/symlinkSafety/zipSlipPrevention) are both MERGED.

Re-verified by build: container-stack/cerro-torre/verification/idris/cerro-torre.ipkg from origin/main, idris2 0.8.0 → GREEN, all 7 modules, exit 0. Re-grep ground truth: audit's "10 believe_me + 20 idris_crash" was the over-count artifact — 0 genuine removable believe_me; the ~24 idris_crash are ALL documented accepted base (Idris2 0.8 has no postulate kw → partial+idris_crash IS the postulate mechanism, stated in file headers): crypto class-(J) axioms + 2 named bridge axioms + 3 explicitly-OWED string postulates (scoped in PROOF-NEEDS). Base-solid by the build oracle. Closing as completed; residual 3 ImporterProofs postulates remain scoped OWED in PROOF-NEEDS (low marginal leverage, base already guaranteed).

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