Fork button on assistant response texts

[ohsalmeron]

The fork dialog already exists (dialog-fork), but you need to open the command palette to use it. Adding a fork icon button directly on each assistant text response lets you fork from that message point in one click.

The button appears on hover next to the copy button on assistant text responses. It calls the same POST /api/session/:sessionID/fork endpoint and navigates to the new session.

Branch: ohsalmeron/opencode:fork-message

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• The issue appears to be a feature request but does not use the required feature request template. Feature requests must include a verification checkbox confirming the feature hasn't been suggested before, and the title should start with [FEATURE]:.
• No verification that this feature hasn't already been requested.

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

---

This issue might be a duplicate of existing issues. Please check:

• [FEATURE]: Add "Fork to new session" action from message timeline in OpenCode Desktop #25582: [FEATURE]: Add "Fork to new session" action from message timeline in OpenCode Desktop — nearly identical request to add a fork button directly on messages in the UI
• [FEATURE]: ability to revert/fork from the ai message, not only from the user's #8689: [FEATURE]: ability to revert/fork from the ai message, not only from the user's — requests forking from assistant/AI messages specifically

If you believe this was flagged incorrectly, please let a maintainer know.

[github-actions]

This issue has been automatically closed because it was not updated to meet our contributing guidelines within the 2-hour window.

Feel free to open a new issue that follows our issue templates.