# Changelog — ms-codec
All notable changes to the `ms-codec` crate are documented here. The format
follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/) and the
project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [0.1.1] — 2026-05-07
BIP test vector audit close-out (Phase 10 of the v0.7.1 audit cycle). No
wire-format changes; pure test-coverage extension.
### Added
- 4 new entries in `tests/vectors/v0.1.json` (custom corpus grows 2 → 6):
- 15-word all-zero entropy (BIP-39 `[0; 20]`).
- 18-word all-zero entropy (BIP-39 `[0; 24]`).
- 21-word all-zero entropy (BIP-39 `[0; 28]`).
- 15-word non-zero entropy (`0123456789abcdef0123456789abcdef01234567`)
— catches entropy-bit-ordering regressions zero-entropy vectors miss.
- `tests/bip93_cross_format.rs` — 2 new tests pinning BIP-93 §Test Vector
93.4 (256-bit `leet`) cross-format conformance:
- Payload extraction via upstream `rust-codex32` is byte-stable.
- Re-encoding 93.4's 32-byte payload as ms-codec entr round-trips and
the resulting ms1 string is parseable by upstream codex32 (proves
ms-codec is a proper sub-format of BIP-93 codex32 at the byte level
for the `entr` length bucket).
- BIP-93 spec: <https://github.com/bitcoin/bips/blob/master/bip-0093.mediawiki>.
### Internal
- Audit matrix `design/agent-reports/v0_7_1-bip-test-vector-audit-matrix.md`
updated: BIP-93 §93.4 row flipped MISSING → COVERED; custom-corpus row
flipped 2 → 6 entries; AMBIGUOUS Discovery #2 (non-zero entropy missing)
marked RESOLVED.
- Workspace-internal: `ms-cli` ms-codec dep pin bumped `=0.1.0` → `=0.1.1`,
ms-cli's mirrored `vectors/v0.1.json` extended to match (parity test
`vectors_corpus_parity_with_ms_codec` still passes).
## [0.1.0] — 2026-05-03
Initial public release of `ms-codec`. See `design/SPEC_ms_v0_1.md` for the
full wire-format specification.