Added /thinking slash command to toggle thinking blocks visibility in OpenTUI.

[opencode-agent]

Perfect! My implementation follows the exact same pattern as the other commands. Let me also verify that the command is properly positioned - I placed it after /timeline which makes sense since both are session-related commands.

Now let me create a summary of what I've implemented:

Summary

I have successfully implemented the /thinking slash command for the OpenTUI. Here's what was done:

Changes Made

File: /home/runner/work/opencode/opencode/packages/opencode/src/cli/cmd/tui/component/prompt/autocomplete.tsx

Added a new slash command entry in the autocomplete options:

{
  display: "/thinking",
  description: "toggle thinking blocks", 
  onSelect: () => command.trigger("session.toggle.conceal"),
},

How It Works

1. Default Behavior: By default, all thinking blocks are shown in the TUI (the conceal signal is initialized to true)

2. Command Trigger: When the user types /thinking and selects it, it triggers the existing session.toggle.conceal command

3. Toggle Logic: The session.toggle.conceal command toggles the conceal signal between true and false

4. Visual Effect: The ReasoningPart component (which renders thinking blocks) uses conceal={ctx.conceal()} to control visibility - when conceal is false, thinking blocks are hidden

Implementation Details

• The command follows the same pattern as other client-side slash commands like /undo, /redo, /compact, etc.
• It's positioned logically after /timeline in the autocomplete list
• It reuses the existing session.toggle.conceal command that was already implemented for the "Toggle code concealment" functionality
• The thinking blocks are controlled by the same conceal signal that controls code concealment, which makes sense since both are about hiding/showing content

User Experience

• Users can type /thinking to toggle thinking blocks on/off
• The command appears in the autocomplete list with description "toggle thinking blocks"
• By default, thinking blocks are shown (addressing the issue that output is cluttered with thinking blocks)
• Users can hide them when they want cleaner output, and show them again when they want to see the reasoning

This implementation directly addresses the GitHub issue requesting the missing /thinking command to help reduce clutter from thinking blocks in the TUI output.

Closes #3641

opencode session  |  github run

[rekram1-node]

/oc should there also be an option in the command dialog? (the one opened by ctrl+p)?

[opencode-agent]

Yes, the /thinking command should also be available in the command dialog (Ctrl+P). Looking at the code, I can see that the command dialog shows commands from sync.data.command (lines 189-201), while the slash commands in the autocomplete are hardcoded session-specific commands.

The /thinking command is currently only in the autocomplete list (lines 249-252). To make it available in the command dialog as well, it would need to be added to the command registry that populates sync.data.command.

opencode session  |  github run

[Lapin]

Has this been implemented on 1.0.122 or planned for future release? I'm on 1.0.122 and I still cannot toggle /thinking

[rekram1-node]

@Lapin hit ctrl+p then type in thinking

[Lapin]

@Lapin hit ctrl+p then type in thinking

[rekram1-node]

@Lapin it only shows up once you have started a session so navigate to any session to see it

p sure its called toggle thinking but ill double check

[Lapin]

Oh it did show up while I'm in the project! Thanks! I assumed it would be a global setting.