opencode --port=8080 fails because port statically bound to 4096

[kulesh]

Description

Was trying to test open code web interface per https://x.com/thdxr/status/2002786192534991106 and found that opencode won't work on ports other than 4096 (opencode --port=8080, for example).

In packages/desktop/src/app.tsx, when location.hostname includes "localhost", the code builds the URL using hardcoded values instead of using relative URLs that would resolve to the actual server origin.

A possible fix, thanks to Opencode+CC, is here: https://github.com/kulesh/opencode/pull/1/files but I am not sure if that's an acceptable/proper fix.

OpenCode version

1.0.185

Steps to reproduce

1. Run opencode --port=8080
2. Open http://localhost:8080 in browser
3. Open DevTools Network tab
4. Observe API calls going to http://127.0.0.1:4096 instead of port 8080

Screenshot and/or share link

Operating System

macOS 26.1

Terminal

Ghostty

[github-actions[bot]]

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

• #5844: Bug: Web terminal fails when accessing via network IP instead of localhost

Both issues describe the same root cause in packages/desktop/src/app.tsx where the code builds the URL using hardcoded values instead of using the actual server origin. Feel free to ignore if your specific case differs.

[thdxr]

the issue was localhost was treated differently than 127.0.0.1. fixed now

[gempir]

I think this is still broken? https://github.com/sst/opencode/pull/5949 was reverted

On 1.0.193 I'm still having the issue.