mrwulf 8d67e9519c L1+L2: hashing shapes, domain separation, MTH/Root/ConsRec with termination ...

Accumulator pyramid layers 1-2, mechanizing paper SS5.3/SS6 groundwork:
- gen/LTLAcc/HashExternal.lean: the single sanctioned axiom, opaque
  sha256 (no properties assumed - the soundness theorems downstream are
  constructive collision extractors).
- Proofs/Basic.lean: hleaf/hnode (0x00/0x01 domain stamps); Lemma 1
  (domsep) proven AXIOM-FREE; kbelow (largest power of two below n)
  with pos/lt/le-two bound lemmas; MTH, Root (Option = rejection),
  ConsRec (four cases, b-flag, pinned anchor) - all with kernel-checked
  termination via the kbelow bounds.
- check.sh: estate discipline (stub audit, axiom-smuggling gate,
  lean-guard compilation, boundary-exact per-certificate cone audit).
  All green; observed cones pinned exactly.

Zero contact with the live LTL: no appends, no server, accumulator
frozen at 12 leaves throughout this project.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-10 23:58:00 +02:00

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