Clipboard copy fails in web-based VSCode terminals (code-server, GitHub Codespaces)

[xuxusheng]

Description

Clipboard copy functionality does not work when running OpenCode in web-based VSCode environments such as:

• code-server (self-hosted VS Code in browser)
• GitHub Codespaces
• VS Code Remote SSH (in some configurations)
• Gitpod

The UI shows "Copied to clipboard" notification, but nothing is actually copied to the clipboard.

Environment

• OpenCode version: v1.14.41
• VS Code environment: code-server / GitHub Codespaces
• Terminal: VS Code integrated terminal (web-based)
• OS: Linux (headless server, no X11/Wayland)
• Browser: Chrome/Firefox/Edge

Steps to Reproduce

1. Open a web-based VSCode environment (code-server, GitHub Codespaces, etc.)
2. Install and run OpenCode in the integrated terminal
3. Start a conversation and get a response
4. Try to copy text using:
   • Mouse selection (auto-copy on select)
   • OpenCode's built-in copy command (y key)
   • Keyboard shortcuts (Ctrl+C/Cmd+C)
5. Notification shows "Copied to clipboard"
6. Try to paste in another application
7. Result: Nothing is pasted (clipboard is empty)

Expected Behavior

Clipboard copy should work in web-based VSCode environments, allowing users to copy:

• Code snippets from responses
• File paths and URLs
• Any text content from OpenCode

Actual Behavior

• Copy notification appears ("Copied to clipboard")
• Nothing is actually copied to clipboard
• No way to copy content from OpenCode in web-based VSCode

Impact

This issue affects developers who use:

• code-server: Self-hosted VS Code for remote development
• GitHub Codespaces: Cloud-based development environments
• Gitpod: Cloud development platforms
• VS Code Remote SSH: Remote server development

These environments are increasingly popular for remote development, cloud-based workflows, and development on tablets/mobile devices.

Related Issues

• #11909: OSC52 clipboard doesn't work with VS Code Remote SSH
• #4283: Copy To Clipboard is not working
• opencode lastest version not copy to clipbord #17483: opencode latest version not copy to clipboard
• #8237: copying to clipboard doesn't work in a remote session

[github-actions]

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

• OSC52 clipboard doesn't work with VS Code Remote SSH - need fallback or detection #11909: OSC52 clipboard doesn't work with VS Code Remote SSH - covers the same environment detection problem and silent failure with the same root cause
• copying to clipboard doesn't work in a remote session (like a devcontainer) #8237: Clipboard copy fails in devcontainer/remote sessions - same issue in VS Code-based remote environments

Please review those issues to see if your report adds new information not already covered. If it does, please clarify what is different.

[samuel-stern-fhr]

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

• OSC52 clipboard doesn't work with VS Code Remote SSH - need fallback or detection #11909: OSC52 clipboard doesn't work with VS Code Remote SSH - covers the same environment detection problem and silent failure with the same root cause
• copying to clipboard doesn't work in a remote session (like a devcontainer) #8237: Clipboard copy fails in devcontainer/remote sessions - same issue in VS Code-based remote environments

Please review those issues to see if your report adds new information not already covered. If it does, please clarify what is different.

This is the same issue, but it is unresolved.

[l-astslice]

/tui default fixes this instantly in claude code! which was my issue

[Animeshz]

As a workaround I patched the opencode with:

diff --git a/packages/tui/src/app.tsx b/packages/tui/src/app.tsx
index 1b9fad873..2e749c900 100644
--- a/packages/tui/src/app.tsx
+++ b/packages/tui/src/app.tsx
@@ -134,6 +134,7 @@ const appBindingCommands = [
   "app.toggle.diffwrap",
   "app.toggle.paste_summary",
   "app.toggle.session_directory_filter",
+  "app.toggle.mouse",
 ] as const
 
 export type TuiInput = {
@@ -940,6 +941,19 @@ function App(props: { onSnapshot?: () => Promise<string[]>; pluginHost: TuiPlugi
           dialog.clear()
         },
       },
+      {
+        name: "app.toggle.mouse",
+        title: renderer.useMouse ? "Disable mouse mode (enable Cmd+C)" : "Enable mouse mode (enable scrolling)",
+        category: "System",
+        run: () => {
+          renderer.useMouse = !renderer.useMouse
+          dialog.clear()
+          toast.show({
+            message: renderer.useMouse ? "Mouse mode enabled" : "Mouse mode disabled — Cmd+C copy should work",
+            variant: "info",
+          })
+        },
+      },
       {
         name: "permission.mode",
         title:
diff --git a/packages/tui/src/config/keybind.ts b/packages/tui/src/config/keybind.ts
index 5dd7e4b5a..f2a70c862 100644
--- a/packages/tui/src/config/keybind.ts
+++ b/packages/tui/src/config/keybind.ts
@@ -54,6 +54,7 @@ export const Definitions = {
   app_toggle_diffwrap: keybind("none", "Toggle diff wrapping"),
   app_toggle_paste_summary: keybind("none", "Toggle paste summary"),
   app_toggle_session_directory_filter: keybind("none", "Toggle session directory filtering"),
+  app_toggle_mouse: keybind("ctrl+o", "Toggle mouse mode (on/off) for copy support"),
   command_list: keybind("ctrl+p", "List available commands"),
   help_show: keybind("none", "Open help dialog"),
   docs_open: keybind("none", "Open documentation"),
@@ -263,6 +264,7 @@ export const CommandMap = {
   app_toggle_diffwrap: "app.toggle.diffwrap",
   app_toggle_paste_summary: "app.toggle.paste_summary",
   app_toggle_session_directory_filter: "app.toggle.session_directory_filter",
+  app_toggle_mouse: "app.toggle.mouse",
   command_list: "command.palette.show",
   help_show: "help.show",
   docs_open: "docs.open",

ctrl+o stops all event captures - scroll will stop working too - but the selection & copy works just like it'd work in a normal terminal (Cmd+c). Then when copy is done, you can toggle the mouse & keyboard events back on by ctrl+o.

[GHuyHuynh]

Running into the same issue with pasting from clipboard. I suspect this related to opentui and the kitty keybinding not working with browser base terminals. Hope this get fix soon

[Yakrel]

**Workaround for code-server / web-based VS Code terminals:

Setting OPENCODE_DISABLE_MOUSE=true as an environment variable disables opencode TUI mouse capture, allowing the browser native text selection and copy (Ctrl+C) to work normally in code-server terminals.

Add to ~/.bashrc:

export OPENCODE_DISABLE_MOUSE=true

Why this works: opencode TUI intercepts all mouse events and attempts clipboard writes via OSC52 then xclip/xsel, which silently fail in headless web-based VS Code environments (no X11/Wayland, and VS Code does not forward OSC52). By disabling mouse capture, the browser handles text selection and clipboard natively, bypassing opencode broken clipboard chain entirely.

Tested on:

• code-server v4.x + opencode v1.18.4
• Headless Debian 13 (no X11/Wayland)
• Cloudflare Tunnel access

Caveat: keyboard-only TUI navigation (arrow keys, tab, enter) - no mouse scrolling or clicking on UI elements. Practically fine for most workflows since keyboard shortcuts (Ctrl+X Y etc.) still work.

[GHuyHuynh]

Thanks for the workaround @Yakrel . Hopefully Opencode fix this soon so we can use OC on web-based terminals