The most comprehensive single resource for power-user tips. Highlights: (1) proactive context compaction via HANDOFF.md documents; (2) Gemini CLI as fallback when WebFetch fails on blocked sites; (3) skills vs. CLAUDE.md optimization — infrequently-used functionality in skills (loaded on-demand), essential guidance in CLAUDE.md only; (4) having Claude Code control another instance in Docker via tmux for autonomous worker workflows.