Windows: MCP log directory creation fails due to colons in path

Description

On Windows, Claude Code fails to create MCP plugin log directories because the generated path contains colons (:), which are illegal characters in Windows filesystem paths.

Error Message

ENOENT: no such file or directory, mkdir 'C:\Users\rmi\AppData\Local\claude-cli-nodejs\Cache\C--Users-rmi-Sources-gas-core-backtesting\mcp-logs-plugin:fp-claude-plugin:context7'
    path: "C:\Users\rmi\AppData\Local\claude-cli-nodejs\Cache\C--Users-rmi-Sources-gas-core-backtesting\mcp-logs-plugin:fp-claude-plugin:context7",
 syscall: "mkdir",
   errno: -2,
    code: "ENOENT"

Steps to Reproduce

1. Install a plugin marketplace on Windows
2. Run a plugin command that triggers MCP logging (e.g., a health check command)
3. Observe the ENOENT error when Claude tries to create log directories

Expected Behavior

Directory names should use Windows-safe characters. Colons should be replaced with dashes, underscores, or another safe delimiter on Windows.

Environment

• OS: Windows 11 (10.0.26100.7092)
• Claude Code Version: 2.0.65

Suggested Fix

When generating MCP log directory paths on Windows (process.platform === 'win32'), replace colons with a safe character like - or _.

🤖 Generated with Claude Code