[FEATURE]: Question Tool 'type your own answer' doesnt' support file references

[AyushWalekar]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

Type your own answer section in question tool input doesn't support adding file reference.

[bezerraluiz]

Hello, I'll see what I can do to help you. After I'll return with documentation of my changes.

[bezerraluiz]

Hello again, I made some changes and here go the screenshots of use and below the documentation. I don't send the pull request, because I wanna read your opinion.

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Doc:

File references in “Type your own answer” (tool question)

What changed

In the TUI (planning mode), when the question tool shows the “Type your own answer” option, you can now insert file references like @path/to/file using the same autocomplete behavior as the main prompt input.

This fixes the case where the custom answer input couldn’t (or couldn’t easily) reference files during the question flow.

How to test / use

1. Start the TUI and enter a flow that triggers the question tool (e.g., planning mode).
2. Select “Type your own answer” to focus the textarea.
3. Type @ and start writing a path (e.g., @README.md).
4. Use autocomplete:
   • tab: selects the highlighted autocomplete item
   • esc: closes autocomplete
5. To submit the custom answer:
   • press enter again (with autocomplete closed) to confirm/advance, as before.

Implementation location

• question tool UI (TUI): packages/opencode/src/cli/cmd/tui/routes/session/question.tsx

[AyushWalekar]

looks good!

[bezerraluiz]

I'll open a PR.

And I return.

But if you wanna use, follow my branch and my commit link:

https://github.com/bezerraluiz/opencode/tree/issue-11026

bezerraluiz@db3e3ce

[jesseleite]

Agreed! And not just @mention'ing files, but also subagents from this 'Type your own answer' input 🙏