feat(tui): go to parent keybind for subagents

[rgodha24]

Screen.Recording.2025-12-18.at.2.05.59.PM.mov

[Copilot]

Pull request overview

This PR adds a "go to parent session" keybind feature for navigating from subagent sessions back to their parent session. The default keybind is set to <leader>up, complementing the existing left/right navigation for cycling through child sessions.

• Adds session_parent keybind configuration with default value <leader>up
• Implements navigation command to jump to parent session when invoked from a subagent
• Displays the new keybind hint in the session header for subagent sessions

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
packages/sdk/js/src/v2/gen/types.gen.ts	Adds TypeScript type definition for the new session_parent keybind configuration option
packages/opencode/src/config/config.ts	Defines the config schema for session_parent keybind with default value <leader>up
packages/opencode/src/cli/cmd/tui/routes/session/index.tsx	Implements the command handler that navigates to the parent session when parentID exists
packages/opencode/src/cli/cmd/tui/routes/session/header.tsx	Adds UI element displaying the parent session keybind hint in subagent session headers

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[zenyr]

Hey! I was struggling with the same issue, having to cycle through 20+ child sessions to get back to the parent was quite frustrating. I had OpenCode search for existing issues/PRs, and it found two open PRs addressing this:

• feat(tui): go to parent keybind for subagents #5762 (this PR) - Clean, minimal approach adding the keybind
• feat: add subagents sidebar with clickable navigation and parent keybind #4865 - Same keybind plus additional sidebar UI for subagent visualization

I really like the focused approach here! Both PRs implement the same session_parent keybind, but this one keeps the scope minimal (+32/-2 vs +131/-6). The sidebar UI in #4865 is nice, but could be added separately if needed later.

This PR pairs really well with the recently added feature to click on subagent sessions to navigate to them. Having a simple session_child_return_to_parent keybind to jump back completes the workflow perfectly.

Also appreciate that this aligns with the original proposal in:

• [FEATURE]: Navigation to parent session from child/subagent sessions #3291 - ctrl+up for parent navigation

Would love to see either one merged!

[rekram1-node]

/review

[github-actions]

lgtm