opencode

OpenCode v1.15.9: Redesigned Diff Viewer & Error Clarity

OpenCode v1.15.9 ships a redesigned diff viewer with file tree navigation, clearer error messages across the platform, and desktop UI refinements. Session status now appears in the title bar.

TL;DR

Redesigned diff viewer with file tree and new layout, now enabled by default
Clearer error messages across model validation, PTY sessions, skill invocation, and MCP servers
Desktop UI improvements: session status in title bar, refined tab navigation
MCP OAuth callback port support and Vertex Anthropic multi-region endpoint fixes

New

Redesigned diff viewer — File tree navigation and refreshed layout, enabled by default for all users
Session status in title bar — Desktop app now displays active session state directly in the window title
Copy worktree path from command palette — TUI improvement for faster project navigation

Fixed

Return to previous screen when closing diff viewer instead of getting stuck
Clearer error messages for invalid or unavailable default models
Surface missing PTY session errors instead of generic failures
Improve diff viewer empty states and context handling
Show explicit errors when skill invocation or installation upgrades fail
Better error reporting from HTTP API for project not found, PTY errors, MCP server not found, and session busy states
Extract user codes correctly from callback URLs containing multiple colons
Preserve native reasoning continuation metadata across conversation turns
Use correct Vertex Anthropic endpoints for us and eu multi-region setups
MCP OAuth configs now support callback port configuration and include configured scopes in client metadata
Debounce VCS refreshes to reduce unnecessary session page updates
Refine diff viewer keyboard shortcuts and restore question prompt key handling
Keep spinner color aligned with active agent state