OpenCode v1.15.0

OpenCode v1.15.0 was released on .

Summary

Core Improvements - Added an Effect-based core event system for more complete event delivery across sessions and integrations. Bugfixes - Ignored invalid exports in custom tool modules instead of f...

Release Context

  • This was the 125th OpenCode release of 2026 tracked by Havoptic.
  • It shipped the same day as OpenCode v1.14.51 (May 15, 2026).

Shipped around the same time

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Release Notes

Core Improvements - Added an Effect-based core event system for more complete event delivery across sessions and integrations. Bugfixes - Ignored invalid exports in custom tool modules instead of failing tool loading. - Ignored project instruction lookup errors so sessions keep loading when project instruction discovery fails. - Fixed versioned event projector lookups so event replay uses the right handlers. Desktop Improvements - Auto-hide the menu bar on Linux and Windows. (@shi-gg) Bugfixes - Fixed archived sessions being reprocessed when their archive state did not change. SDK Bugfixes - Restored missing event types in the JavaScript SDK, including session and message events. Thank you to 1 community contributor: - @shi-gg: - feat(desktop): auto-hide menu bar on Linux and Windows (27618)

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