tui: auto_scroll has no effect on new messages / long prompts (v1.14.50) #32578

Description

Version

• opencode --version: 1.14.50
• Platform: macOS Apple Silicon

Config

~/.config/opencode/tui.json:

{
  "$schema": "https://opencode.ai/tui.json",
  "keybinds": {
    "command_list": "<leader>p",
    "input_submit": "return",
    "input_newline": "shift+return,ctrl+return,alt+return,ctrl+j"
  },
  "tui": {
    "auto_scroll": false,
    "scroll_speed": 3,
    "scroll_acceleration": {
      "enabled": true
    }
  }
}

(keybinds can be omitted; the issue reproduces with the minimal config above)

Expected behavior

With tui.auto_scroll: false I expect the TUI to not auto-scroll in these cases:

1. When a new assistant message is streamed in and I have manually scrolled up to read previous messages, the scroll position should stay where I left it (no forced jump to the bottom).
2. When I type a long prompt that exceeds the visible input area, the scroll should stay anchored (no forced auto-scroll to the very bottom while I'm editing).

Actual behavior (v1.14.50)

Even with auto_scroll: false:

1. When a new assistant message is streamed, the TUI still auto-scrolls to the latest message and pulls the view to the bottom.
2. When I type a long prompt, the input keeps auto-scrolling to the bottom instead of respecting the current cursor/scroll position.

This makes it hard to:

• read older parts of the conversation while a long reply is streaming;
• edit long prompts without the view constantly jumping.

Notes

• I see the feat(tui): add auto_scroll configuration setting in the repo history and references to scroll anchoring fixes for streamed messages.
• However, in v1.14.50 the tui.auto_scroll flag seems to have no user-visible effect in these scenarios, or is overridden by other scroll logic (possibly related to scroll_acceleration).

Happy to test a dev/nightly build or provide additional debug info if needed.

Plugins

No response

OpenCode version

1.14.50

Steps to reproduce

1. Open opencode v1.14.50 with tui.auto_scroll: false in tui.json
2. Start a session and send a long prompt (or wait for a long assistant response to stream in)
3. While the response is streaming (or while editing a long prompt), manually scroll up to read previous messages
4. Observe the scroll position — the TUI auto-scrolls back to the bottom despite auto_scroll: false

Screenshot and/or share link

No response

Operating System

macOS Apple Silicon

Terminal

iTerm2