Description
OpenCode fails before sending any prompt to the model. The UI shows:
Failed to send prompt
Unexpected server error. Check server logs for details.
The server log shows:
TypeError: undefined is not an object (evaluating 'a.name')
at SystemPrompt.environment
at SessionPrompt.run
at SessionPrompt.prompt
The error occurs repeatedly for new sessions and different working directories.
Plugins
no
OpenCode version
1.18.30
Steps to reproduce
opencode --pure --print-logs --log-level DEBUG run "Reply with exactly: OK"
Observed output:
timestamp=2026-09-14T10:33:47.470Z level=ERROR run=72d3ed46 message=failed ref=err_1005f375 error="TypeError: undefined is not an object (evaluating 'a.name')" cause="TypeError: undefined is not an object (evaluating 'a.name')\n at resolve (/$bunfs/root/chunk-36bwgd4p.js:2:1659)\n at a (/$bunfs/root/chunk-36bwgd4p.js:2:936)\n at map (native:1:11)\n at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1626)\n at a (/$bunfs/root/chunk-36bwgd4p.js:2:1166)\n at map (native:1:11)\n at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1626)\n at a (/$bunfs/root/chunk-36bwgd4p.js:2:1166)\n at map (native:1:11)\n at <anonymous> (/$bunfs/root/chunk-36bwgd4p.js:2:1390)\n at SystemPrompt.environment (/$bunfs/root/chunk-n59f7cwr.js:50:13096)\n at SystemPrompt.environment (definition) (/$bunfs/root/chunk-n59f7cwr.js:4:14254)\n at SessionPrompt.run (/$bunfs/root/chunk-n59f7cwr.js:50:14576)\n at SessionPrompt.run (definition) (/$bunfs/root/chunk-n59f7cwr.js:50:10099)\n at SessionRunState.ensureRunning (/$bunfs/root/chunk-n59f7cwr.js:50:14545)\n at SessionRunState.ensureRunning (definition) (/$bunfs/root/chunk-n59f7cwr.js:2:6720)\n at SessionPrompt.loop (/$bunfs/root/chunk-n59f7cwr.js:50:9849)\n at SessionPrompt.loop (definition) (/$bunfs/root/chunk-n59f7cwr.js:50:14481)\n at SessionPrompt.prompt (/$bunfs/root/chunk-p2p9kfnt.js:6:11695)\n at SessionPrompt.prompt (definition) (/$bunfs/root/chunk-n59f7cwr.js:50:9462)"
Error: {
"name": "UnknownError",
"data": {
"message": "Unexpected server error. Check server logs for details.",
"ref": "err_1005f375"
}
}
Screenshot and/or share link
No response
Operating System
macOS 27.0(Apple Silicon)
Terminal
zsh
Description
OpenCode fails before sending any prompt to the model. The UI shows:
The server log shows:
The error occurs repeatedly for new sessions and different working directories.
Plugins
no
OpenCode version
1.18.30
Steps to reproduce
Observed output:
Screenshot and/or share link
No response
Operating System
macOS 27.0(Apple Silicon)
Terminal
zsh