Agent Breaking Changes_

← OpenCode

OpenCode v1.18.11

2026-08-01 · official notes

Summary

• Stopped MCP SSE connections from getting stuck in reconnect loops after server error responses.
• Fixed provider model configs that use interleaved reasoning fields like reasoningtext or custom field names.
• Open external links in the system browser instead of inside the app.

Full notes

## Core

### Bugfixes

- Stopped MCP SSE connections from getting stuck in reconnect loops after server error responses.
- Fixed provider model configs that use interleaved reasoning fields like `reasoning_text` or custom field names.

## Desktop

### Bugfixes

- Open external links in the system browser instead of inside the app.
- Fixed stale session tab state in the desktop title bar. (@OpeOginni)
- Open the legacy directory picker at your home folder when no home path is loaded yet.
- Prevent the file tree tab from clipping when resized smaller. (@OpeOginni)
- Fixed debug gutter labels and values misaligning.

**Thank you to 2 community contributors:**
- @devennavani:
  - docs: add Modal provider setup (#39710)
- @OpeOginni:
  - fix(app): prevent file tree tab clipping (#39770)
  - fix(app): prevent stale session tab reads (#39767)
  - fix(app): prevent stale prompt control reads (#39842)