VibeLang v0.4.0

VibeLang v0.4.0

A stability and correctness release. v0.4 focuses on fixing bugs found during a thorough code review, improving hot-reload reliability, and bringing SFZ instruments into the diff/reload system.

Highlights

• SFZ instruments now participate in hot-reload — previously, SFZ voices were outside the diff system entirely. Changing an SFZ instrument in your script now correctly updates during live coding without restarting.
• Stateful fades with reload diffing — fades are now tracked as first-class entities in the runtime state, enabling proper diff-based updates during hot-reload.
• MIDI channel convention standardized to 1-16 — matches musician expectations instead of the internal 0-15 representation.

Bug Fixes

• Sequences now actually stop on reload — removing .start() from a sequence during live coding previously left it playing forever. Fixed.
• Group diff no longer reports phantom updates — the runtime now tracks group names, eliminating unnecessary updates on every reload.
• Entity ID hash collision detection — FNV-1a 32-bit hashes now detect collisions with linear probing instead of silently overwriting.
• Input validation across the API:
  • set_tempo() clamped to 1.0–999.0
  • set_time_signature() validates numerator (1–32) and snaps denominator to power-of-2
  • Pattern/melody lengths enforce minimum 1/64th note
  • Fade durations enforce minimum 1/64th note
• Voices with empty synthdefs now log a warning instead of silently failing.
• Pattern .on() warns when referencing a nonexistent voice.
• Group finalization now runs on updates too, not just initial creation.
• MIDI Start no longer re-sent on hot-reload; fades restart correctly.
• Eliminated all unwrap() calls in vibelang-core, replaced with proper error handling.

Code Quality

• Fixed all pre-existing test failures
• Added clippy::unwrap_used warning to vibelang-core
• Comprehensive code review completed and tracked (see REVIEW_TODO.md)

Install / Upgrade

cargo install vibelang-cli

Full changelog: v0.3.0...v0.4.0