v4.0.0

4.0.0 (2026-10-13)

⚠ BREAKING CHANGES

• engine: move Go placeholder conversion out of the VM
• engine: enforce immutable VM ownership for streams
• engine: scope variable identities to each VM and remove ResetEnv
• engine: scope execution state to each VM

Features

• engine: add deterministic term-cell metering (c30ae9f)
• engine: scope execution state to each VM (a9b0f1c)
• engine: scope variable identities to each VM and remove ResetEnv (91e9b23)

Bug Fixes

• engine: enforce immutable VM ownership for streams (882b819)
• engine: fix stream close lifecycle (f78b4f0)
• engine: fix write mode file truncation (07a7af5)
• engine: handle negative makeSlice lengths (7ab0b75)
• engine: roll back open/4 file and alias on option parse failure (b4bfba3)

Code Refactoring

• engine: move Go placeholder conversion out of the VM (73dfacf)