v0.4.3

Fixed

• Invalid saved-leg revisions return recoverable validation before approval rendering,
  preserving prior plans and exact approval for supported changes.
• Browser generation failures expose sanitized provider causes and recovery guidance.
  Uncertain Generate outcomes retain their claim and require user confirmation before
  finalization.

Added

• Versioned whole-workflow evaluations with controlled providers, retained-state checks,
  paired baseline comparisons, and explicitly labeled LangSmith experiments.