Sækja opencode 1.18.5

Core
Bugfixes
- Improve Claude adaptive thinking handling across more response shapes.
- Avoid OpenAI Responses phase handling that could break some conversations.
- Preserve grep symlink paths in search results. (@remixz)
- Preserve Mistral reasoning history across turns.
- Stabilize Mistral prompt caching.
- Use the correct prompt cache keys for each SDK.
- Fix MiniMax M3 thinking variant selection.
Desktop
Improvements
- Support the current server terminal transport.
- Support current-server review data in the desktop app.
- Update server discovery flows for current servers.
- Support current-server session actions, including prompts and commands.
- Render current-server session timelines.
- Stream current-server events in the desktop app.
- Detect legacy and current servers so the desktop app can work with both.
Bugfixes
- Restore optimistic timeline updates while responses are still streaming.
- Hide legacy-only features when connected to current servers.
- Preserve inline file mentions when sending prompts to legacy servers.
- Stop auto-accepting config permissions on current servers.
- Keep current servers out of the legacy layout.
- Show plain file contents in file-specific tabs instead of review diffs.
- Keep the prompt input agent toggle in sync.
- Keep paginated session timelines in the right order.
- Restore directory-scoped session status for legacy servers.
- Reload legacy session progress after hydration.
Thank you to 2 community contributors:
- @dleopold:
- fix(app): classify existing web profiles for layout transition (#38117)
- @remixz:
- fix(opencode): preserve grep symlink paths (#38581)