[Bug] TUI movement too fast on MacBook TouchBar causing rapid screen scrolling

[mahidalhan]

Bug Description

The OpenCode TUI interface moves/scrolls too quickly when interacting with it on MacBook devices, particularly when using the TouchBar. This causes the interface to rapidly scroll through content, making it difficult to navigate and read the output effectively.

Expected Behavior

• TUI should scroll at a reasonable, controllable speed
• Users should be able to navigate through the interface smoothly
• TouchBar interactions should provide precise control over scrolling

Actual Behavior

• TUI scrolls extremely fast through content
• Makes it nearly impossible to read or interact with the interface effectively
• TouchBar seems to trigger rapid, uncontrollable scrolling

Comparison with Other Tools

Important: This issue is specific to OpenCode. Other similar tools work correctly:

• Claude Code scrolling works perfectly with TouchBar - no speed issues
• Files in Cursor IDE scroll at normal, expected speeds with TouchBar
• This suggests the issue is specific to OpenCode's TUI implementation

Environment

• Platform: macOS
• Device: MacBook with TouchBar
• **OpenCode Version: 0.11.3
• Terminal: Cursor IDE

Steps to Reproduce

1. Launch OpenCode in terminal
2. Interact with the TUI using TouchBar or trackpad scrolling
3. Observe rapid, uncontrollable scrolling behavior
4. Compare with Claude Code or Cursor IDE for reference

Additional Context

This issue specifically affects the usability of OpenCode on MacBook devices with TouchBar functionality. The scroll sensitivity appears to be too high for the TouchBar's input characteristics.

**Video demonstration provided"

Possible Solutions

• Add scroll sensitivity configuration options
• Implement scroll speed dampening for TouchBar devices
• Add scroll acceleration/deceleration curves similar to other macOS applications
• Study how Claude Code handles TouchBar scrolling for reference

[github-actions]

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

• Opencode freezes when pressing option + left arrow key on MacBook with high CPU usage #2688: OpenCode freezes when pressing option + left arrow key on MacBook with high CPU usage - also specifically affects MacBook users with navigation/input issues
• Windows WSL/Jetbrains Goland scrolling bug #2548: Windows WSL/Jetbrains GoLand scrolling bug - describes similar rapid scrolling behavior where scroll input gets stuck and causes uncontrollable scrolling
• When scrolling up the output text went behind other ui elements. #2613: When scrolling up the output text went behind other UI elements - related to scrolling behavior issues in the TUI

Feel free to ignore if none of these address your specific case.

[rekram1-node]

@mahidalhan the scroll speed is pretty dependent on your emulator right now, if it is too fast consider putting this in your opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "tui": {
    "scroll_speed": 1,
  },
}

[mahidalhan]

issue-opencode-lean.mp4

[rekram1-node]

@mahidalhan yeah our scroll is pretty poor, luckily the tui is currently being rewritten and problems like this and many others should be addressed either by the migration or hopefully swiftly after.

Scroll speed issues have been raised for a while so I hope they get taken care of by migration.

[JuliaBonita]

I'm running the latest version of OpenCode and the crazy scroll speed still affects OpenCode when it's running inside Zed IDE terminal (not via the Zed AI panel), too, on any Macbook that I've used. Adjusting the scroll spead in opencode.json has no meaningful effect.

[felixmccuaig]

This is completely broken, does anyone have a fix, it makes the tool pretty much unusable.

[rekram1-node]

@felixmccuaig what terminal are u using?

[udondan]

@rekram1-node this is the terminal in VS Code. While in iTerm2 the scroll speed is reasonable in VS Code it is insanely fast and scroll_speed no longer makes a difference. scroll_speed = 1 used to work pre-v1 to fix it in VS Code.

[rekram1-node]

Yeah @udondan the scroll speed config isn't working known issue we will fix