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Vant Progress

Current Phase: 2.5 - Tone Placement Fix [COMPLETE]

Started: 2026-03-15 Completed: 2026-03-15

Tasks

  • tone.rs — Vietnamese syllable parser (initial consonant, vowels, final consonant)
  • tone.rs — Tone detection/manipulation using vi crate utilities
  • tone.rs — Tone position algorithm ported from xkey/Unikey rules
  • tone.rs — relocate_tone() post-processor moves tone to correct vowel
  • engine.rs — Wired relocate_tone() into recompose()
  • Tests — 80 total (51 original + 6 tone relocation + 23 tone module unit tests)
  • make build — full pipeline (Rust + Xcode) succeeds

Phase 2.5 Milestone: ACHIEVED

Fixed tone placement bugs where typing tone before final consonant put the mark on the wrong vowel (e.g., "Vịêt" → "Việt", "xúât" → "xuất"). Post-processing approach: vi crate handles diacritics, new tone.rs relocates misplaced tones using xkey-derived rules.

Completed Phases

  • Phase 0: Scaffold (2026-03-15)
  • Phase 1: Telex Engine (2026-03-15)
  • Phase 2: Minimal IME (2026-03-15)
  • Phase 2.5: Tone Placement Fix (2026-03-15)

Next Phase: 3 - N-gram Prediction

  • Tier 1 FST dictionary

Upcoming Phases

  • Phase 4: RWKV Integration (Tier 2 inference, ghost text)
  • Phase 5: Polish (code-switching, settings, personalization)