OpenCode compatibility issues: local MCP handshake times out and ingest_traces schema is rejected #78

Summary

codebase-memory-mcp v0.5.3 works in Codex, but it does not work out of the box in OpenCode.

I was able to make it work in OpenCode only by adding a local wrapper around the binary. There seem to be two separate compatibility problems:

1. OpenCode finds the server, starts it, but times out during MCP tool discovery (Failed to get tools)
2. Even after the server is made reachable, OpenCode rejects the ingest_traces tool schema because traces is declared as an array without items

Environment

• macOS
• OpenCode 1.2.27
• codebase-memory-mcp local binary installed as:
  • /Users/<user>/.local/bin/codebase-memory-mcp
• OpenCode configured as a local MCP server

Expected behavior

OpenCode should be able to:

• load codebase-memory-mcp as a local MCP server
• successfully complete the MCP handshake
• list the server tools
• use the tools without schema validation failures

Actual behavior

OpenCode initially failed in two ways:

1. MCP startup / tool discovery timeout

OpenCode log:

service=mcp key=codebase-memory-mcp type=local found
...
ERROR service=mcp key=codebase-memory-mcp error=Operation timed out after 30000ms failed to get tools from client