- Claude Code: write to ~/.claude.json (user) or .mcp.json (project)
  instead of ~/.claude/settings.json which Claude Code ignores for MCP
- Codex: fix TOML key from [mcpServers.pantry] to [mcp_servers.pantry];
  make setup idempotent (check before appending)
- OpenCode: fix config key from "mcpServers" to "mcp"; change command
  from string+args to array as required by OpenCode
- uninstallSkill: remove empty skills/ parent dir after removing
  skills/pantry/ to avoid leaving orphaned directories