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Bug: Apidog MCP Server Crashes OpenCode #2068
Description
When using the Apidog MCP for one of their clients, Purespectrum (docs), the opencode crashes.
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"PureSpectrum": {
"type": "local",
"enabled": true,
"command": ["npx", "-y", "apidog-mcp-server@latest", "--site-id=748984"]
}
}
}Prompt to use the MCP server:
Look at the PureSpectrum documentation to see how to create a surveyUsed this to get the debug logs, see attached file:
opencode --print-logs --log-level DEBUG Main Error:
Caught panic:
interface conversion: interface {} is []interface {}, not string
Restoring terminal...
goroutine 384 [running]:
runtime/debug.Stack()
/opt/hostedtoolcache/go/1.24.6/x64/src/runtime/debug/stack.go:26 +0x64
github.com/charmbracelet/bubbletea/v2.(*Program).recoverFromPanic(0x140001a1200, {0x102fd7a40, 0x140000b3d70})
/home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea/[email protected]/tea.go:1139 +0x10c
github.com/charmbracelet/bubbletea/v2.(*Program).handleCommands.func1.1.1()
/home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea/[email protected]/tea.go:479 +0x40
panic({0x102fd7a40?, 0x140000b3d70?})
/opt/hostedtoolcache/go/1.24.6/x64/src/runtime/panic.go:792 +0x124
github.com/sst/opencode/internal/components/chat.renderArgs(0x140009a21b0, {0x1400237aa3e, 0x4})
/home/runner/work/opencode/opencode/packages/tui/internal/components/chat/message.go:906 +0x620
github.com/sst/opencode/internal/components/chat.renderToolTitle({{0x1400003cb07, 0x1e}, {0x1400003cbd5, 0x1e}, {0x1400003cb34, 0x1e}, {0x1400003cb61, 0x1e}, {{0x1400237aa2b, 0x7}, ...}, ...}, ...)
/home/runner/work/opencode/opencode/packages/tui/internal/components/chat/message.go:810 +0xf9c
github.com/sst/opencode/internal/components/chat.renderToolDetails(_, {{0x1400003cb07, 0x1e}, {0x1400003cbd5, 0x1e}, {0x1400003cb34, 0x1e}, {0x1400003cb61, 0x1e}, {{0x1400237aa2b, ...}, ...}, ...}, ...)
/home/runner/work/opencode/opencode/packages/tui/internal/components/chat/message.go:714 +0x2518
github.com/sst/opencode/internal/components/chat.(*messagesComponent).renderView.func2()
/home/runner/work/opencode/opencode/packages/tui/internal/components/chat/messages.go:581 +0x3914
github.com/charmbracelet/bubbletea/v2.(*Program).handleCommands.func1.1()
/home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea/[email protected]/tea.go:484 +0x64
created by github.com/charmbracelet/bubbletea/v2.(*Program).handleCommands.func1 in goroutine 110
/home/runner/go/pkg/mod/github.com/charmbracelet/bubbletea/[email protected]/tea.go:474 +0x10c
INFO 2025-08-19T15:10:37 +2ms service=bus type=* unsubscribing
INFO 2025-08-19T15:10:37 +0ms service=server event disconnected
INFO 2025-08-19T15:10:37 +3ms service=session session=ses_73d1e62d4ffezF9mQlf0GFv7NQ type=tool-result part
INFO 2025-08-19T15:10:37 +0ms service=app name=lsp shutdown
INFO 2025-08-19T15:10:37 +1ms service=app name=session shutdown
INFO 2025-08-19T15:10:37 +0ms service=app name=mcp shutdown
INFO 2025-08-19T15:10:37 +21ms service=bus type=storage.write publishing
INFO 2025-08-19T15:10:37 +0ms service=bus type=message.part.updated publishing
INFO 2025-08-19T15:10:37 +1ms service=session session=ses_73d1e62d4ffezF9mQlf0GFv7NQ type=abort part
INFO 2025-08-19T15:10:37 +0ms service=session session=ses_73d1e62d4ffezF9mQlf0GFv7NQ type=abort unhandled
INFO 2025-08-19T15:10:37 +5ms service=bus type=storage.write publishing
INFO 2025-08-19T15:10:37 +0ms service=bus type=message.updated publishing
INFO 2025-08-19T15:10:37 +2ms service=session session=ses_73d1e62d4ffezF9mQlf0GFv7NQ sessionID=ses_73d1e62d4ffezF9mQlf0GFv7NQ unlocking
INFO 2025-08-19T15:10:37 +0ms service=bus type=session.idle publishing
INFO 2025-08-19T15:10:37 +1ms service=server duration=15183 response
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github-actions commentedon Aug 19, 2025
This issue might be a duplicate of existing issues. Please check:
The interface conversion panic in #2059 appears to be nearly identical to your issue, both occurring in the chat rendering system when handling tool responses from MCP servers.
Feel free to ignore if none of these address your specific case.
rekram1-node commentedon Aug 19, 2025
looks like this may be a tui issue
danielbenjie commentedon Aug 19, 2025
@rekram1-node
I asked OpenCode, that does look like a tui issue:
see code here
rekram1-node commentedon Aug 19, 2025
/opencode please create PR addressing issue above^^ add a casting check to fix it like:
value, ok := util.Relative(value.(string)); ok {...}
opencode-agent commentedon Aug 19, 2025
✅ Fixed the MCP Server Crash
I've successfully implemented the fix for the interface conversion panic and pushed it to a new branch. The changes:
Fix Applied:
packages/tui/internal/components/chat/message.go:905-907value.(string)with safe type checking:if strValue, ok := value.(string); okBranch:
opencode/issue2068-20250819183358Create PR: Visit https://github.com/sst/opencode/pull/new/opencode/issue2068-20250819183358
The fix gracefully handles cases where MCP tools send path parameters as different types (like arrays from Apidog's PureSpectrum client), preventing the crash while maintaining functionality for string paths.
opencode session | github run
rekram1-node commentedon Aug 19, 2025
This should be fixed in next release diagnosed by
opencodeand fixed withopencodetoo hahaha