OpenCode v1.2.9: MCP Attachments & Performance Fixes
OpenCode v1.2.9 adds missing MCP attachment fields, swaps to native structuredClone for performance gains, and fixes Desktop UI issues.
TL;DR
- MCP tool attachments now include missing id, sessionID, and messageID fields
- Replaced remeda clone with native structuredClone for better TUI performance
- Fixed settings header mask in Desktop and removed unnecessary deep clones from core
New
- MCP tool attachment fields — Added missing id, sessionID, and messageID to MCP tool attachments for proper context tracking
Fixed
- TUI performance — Replaced remeda's clone with native structuredClone for better performance and native browser support
- Session loop cloning — Removed unnecessary deep clones from session loop and LLM stream to reduce overhead
- Desktop settings header — Restored settings header mask in Desktop UI
- LLM test assertion — Removed User-Agent header assertion from LLM test to fix failing test
Update with: npm install opencode@1.2.9
Source: OpenCode
