Muse Spark models are having connection issues with `opencode` and `opencode-go` BYOK

[iAziz786]

Summary

I used opencode and opencode-go with BYOK. The other models are working fine but when I'm trying to use Meta's models I'm getting connection issue error. This isn't issue with these models because they are working fine in other harnesses.

❯ hello

⚠ Error: 500 Error Internal server error

  Type "continue" to try again. If the issue persists, contact support: https://commandcode.ai/discord
  Trace ID: 09ca45bc1411b00a70f6c5227e685639

Expected Behavior

I expect that Muse Spark models with OpenCode BYOK should work as like other models are working. I should be getting response for these in cmd and it should have fulfilled my request correctly.

I should not be getting connection issues.

Actual Behavior

The actual behaviour is that I'm constantly getting Connection issue. Retrying... (attempt ...).

The same model is working fine with pi.

Steps to reproduce the issue

1. Add opencode or opencode-go as BYOK
2. Choose opencode/muse-spark-1.3-contributor-free or opencode-go/muse-spark-1.3-contributor as your model
3. Send any request

Most likely you will see it failed. I have also recorded one video me interacting with it and it fails.
https://youtu.be/_jzX9W5HlHU

Command Code Version

1.50.0

Operating System

macOS

Terminal/IDE

ghostty

Shell

zsh

Session file (optional)

GitHub not allowing .jsonl file to drag here hence pasting it's content.

{"type":"session","version":3,"id":"8bfdd86b-fa79-4ef4-983b-c652132bd8fe","timestamp":"2026-09-07T01:53:14.192Z","cwd":"/private/tmp"}
{"type":"message","id":"795c36c7","parentId":null,"timestamp":"2026-09-07T01:54:04.257Z","message":{"role":"user","content":[{"type":"text","text":"hello"}],"meta":{"source":"user","createdAt":1788745998667,"messageId":"daad1bf6-09c2-452b-9ee3-a18da4ca87ab"}}}
{"type":"message","id":"ac6441ee","parentId":"795c36c7","timestamp":"2026-09-07T01:54:04.259Z","message":{"role":"user","content":[{"type":"text","text":"Error: 500 Error Internal server error\n\nType \"continue\" to try again. If the issue persists, contact support: https://commandcode.ai/discord\nTrace ID: b427b55001e31f3bcfd352f3166986af"}],"meta":{"messageId":"7d4630e2-22d8-4e15-9e01-00e82b3634ef"}}}
{"type":"model_change","id":"ebae84ca","parentId":"ac6441ee","timestamp":"2026-09-07T02:00:22.674Z","model":"opencode-go/muse-spark-1.3-contributor"}

Fix prompt (optional)

No response

Additional context

OS: macOS Tahoe 26.6.1