# v0.2.1 KDV Export Regression Readiness

## Summary

issue #3 と issue #4 の KDV HTML 書き出し（HTML export）向け AST 不足を、`prepare-v0-2-1-kdv-export-regressions` として修正した。

## Scope

- GitHub alert blockquote 内の日本語 list item parser panic 修正
- nested inline span children の公開 DTO 反映
- one-line dollar math block の `DollarMathBlock` 反映
- `tests/fixtures/canonical/katana_sample_ja.md` を使った KatanA 日本語 fixture 回帰テスト

## Out of Scope

- KMM 内での HTML 生成
- KMM 内での export 実行
- viewer / editor の scroll、selection、highlight 制御
- KDV、KatanA、KCF、KLE、UI framework への依存

## Local Verification

- `cargo test --test kdv_export_v0_2_1_regressions --locked`: passed
- `cargo test --workspace --locked`: passed
- `scripts/openspec validate "prepare-v0-2-1-kdv-export-regressions" --strict`: passed
- `scripts/openspec validate kmm-v0-2-1-kdv-export-regressions --type spec --strict`: passed
- `just check`: passed
- `just release-check`: passed

## OpenSpec Archive

- archived change: `openspec/changes/archive/2026-05-20-prepare-v0-2-1-kdv-export-regressions`
- updated spec: `openspec/specs/kmm-v0-2-1-kdv-export-regressions/spec.md`

## Additional OpenSpec Cleanup

- archived previous change: `openspec/changes/archive/2026-05-21-prepare-v0-1-1-precision-hardening`
- updated spec: `openspec/specs/kmm-v0-1-1-precision-hardening/spec.md`
- note: the previous change retained its historical incomplete task state; this archive closes the active change folder and preserves the precision-hardening criteria as spec history.

## Publication

Publication has not been performed.
