Claude Code Has Too Many Features. Here Are the 10 That Matter, Ranked. (2/2)

Part 1 covered the foundation: CLAUDE.md, Skills, Hooks, GitHub Actions, and Subagents. Those 5 make Claude Code smart. These next 5 make it scale. Part 1 was “how to make one Claude session effective.” Part 2 is “how to run multiple Claudes in parallel.” Large refactors, external integrations, automated quality gates, and experimental multi-agent collaboration. Ralph Loop The game changer for large-scale tasks. Give Claude a job and tell it “keep going until it’s done.” Mechanism: 1) Claude works 2) Claude tries to stop 3) Stop hook intercepts and re-injects the same prompt 4) Claude reads modified files/git history and continues 5) Loop ends on <promise>DONE</promise> /ralph-loop "Add error handling to all API endpoints. Output <promise>DONE</promise> when complete" --max-iterations 20 Use --max-iterations as a hard safety guard. For large migrations, pair with PROGRESS.md checklist so each loop can resume deterministically. MCP Model Context Protocol is the standard bridge from Clau