Add defer_loading: true to installer MCP configs

[calreynolds]

Claude docs: https://www.anthropic.com/engineering/advanced-tool-use#:~:text=How%20the%20Tool%20Search%20Tool%20works

Basically, this should reduce the amount of context that our skills take when installed and make the llm selectively use them

Summary

• Adds "defer_loading": true to the MCP JSON configs generated by install.sh for Claude Code and Cursor
• This was already documented in the README and used in the repo's own .mcp.json, but the installer wasn't setting it for end users
• Improves startup time by deferring tool loading until tools are actually needed

Test plan

• Run install.sh with --tools claude and verify .mcp.json includes defer_loading: true
• Run install.sh with --tools cursor and verify .cursor/mcp.json includes defer_loading: true
• Verify existing configs are updated correctly (Python JSON merger path)
• Verify fresh installs include it (heredoc fallback path)

Made with Cursor

[malcolndandaro]

LGMT!! nice find!