Agent Breaking Changes_

← OpenCode

OpenCode v1.18.31

2026-09-14 · official notes

Summary

• Restored ACP session model, effort, mode, and reasoning chunk boundaries when loading, resuming, or forking sessions. (@JacobNWolf)
• Show remote config authentication errors during startup and exit with a failure status.
• Improvements

Full notes

## Core

### Bugfixes

- Restored ACP session model, effort, mode, and reasoning chunk boundaries when loading, resuming, or forking sessions. (@JacobNWolf)

## TUI

### Bugfixes

- Show remote config authentication errors during startup and exit with a failure status.

## Extensions

### Improvements

- Request summarized adaptive thinking for GitHub Copilot models.

**Thank you to 4 community contributors:**
- @heimoshuiyu:
  - feat(console): add batch workspace block endpoints (#48491)
- @JacobNWolf:
  - fix(acp): restore session options and reasoning boundaries (#48225)
- @R-Taneja:
  - chore(deps): bump @ai-sdk/gateway to 3.0.191 (#48710)
- @MatthewFeroz:
  - fix(ui): add Merge Gateway logo (#42015)