Credentials are env var names only, read from the LifeOS .env: YOUTUBE_API_KEY (YouTube Data API v3), PERPLEXITY_API_KEY (web search). GitHub uses the authenticated gh CLI.
First-time setup for these sources is in Setup.md.
User customizations live at <configRoot>/LIFEOS/USER/CUSTOMIZATIONS/SKILLS/Pareto/ (configRoot is $CLAUDE_CONFIG_DIR when set, else ~/.claude). When that directory exists, its PREFERENCES.md (for example default sources, sweep size, or sources to skip) overrides the defaults in Intents/Run.md; when it is absent, the defaults stand.