A Locked Decoder for Beinecke MS 408: Reproducibility Package

Reproducibility package for the paper "A Locked Decoder for Beinecke
MS 408: Statistical Evidence for Hebrew Encoding Under a Domain-
Transparent Substitution Cipher" (Hearl 2026).

Contains the locked Python decoder (~180 lines, no external dependencies),
the locked substitution table of 19 rules, the working dictionary of 212
entries, the control-corpus specifications, the self-test suite, and the
SHA-256 manifest required for bit-identity verification. The decoder is
deterministic and reproducible from the publicly available Takahashi EVA
transcription of MS 408.

The package implements a falsifiable hypothesis with a pre-registered
held-out test on the balneological folios (f75-f84). Independent
investigators are invited to run the held-out test and report results
against four pre-committed pass/fail thresholds. Full deposit
documentation, methodology rationale, and reviewer guide are included.

Released under CC BY 4.0 as a Global Public Good. The author retains no
proprietary interest in the methods or results.

Verification: sha256sum -c MANIFEST.txt should report OK on all 16 files.
Self-test: python3 src/voynich_decoder.py --selftest should report
"11 passed, 0 failed".