`opencode` `v1.15.6` adds TUI diff review and shell mode
Change review now happens inside the TUI, and run prompts can drop into shell mode. This is a practical upgrade for terminal-first agent workflows.
- The TUI adds a diff viewer with auto-focus on the first file and collapsed single-child directories, cutting review friction before accepting edits.
- Run now gets shell mode and replaces subagent tabs with an on-demand picker, making agent sessions less crowded during longer tasks.
- Plugin failures are better isolated: file load errors and missing tool args no longer break the rest of plugin loading.
v2HTTP API now exposes structured public error schemas and preserves endpoint error responses in the OpenAPI spec.
