Learning CenterClaude CodeSkills and the CCC Ecosystem
Intermediate7 min read

Skills and the CCC Ecosystem

Load on-demand skills to extend Claude Code with specialized capabilities.

What Are Skills?

Skills are pre-built instruction sets that extend Claude Code with specialized workflows. Rather than writing the same prompts from scratch every session, skills encode best practices for common tasks.

The Everything Claude Code (ECC) ecosystem includes 248+ skills across domains: frontend design, security, DevOps, testing, marketing, sales, and more.

Loading a Skill

Skills are loaded via the Skill tool or slash commands:

/tdd          # Test-driven development workflow
/code-review  # Multi-perspective code review
/security     # OWASP security audit
/deploy-check # Pre-deployment checklist

You can also load skills contextually: "Use the tdd skill to build this feature."

The Skills Index

The ~/.claude/SKILLS-INDEX.md file is a searchable reference of all installed skills. Before building any custom workflow, check the index — there's likely already a skill for it.

Key skills to know:

  • spec-interviewer — Define requirements before building
  • evals-before-specs — Define success criteria first
  • dialectic-review — FOR/AGAINST analysis for hard decisions
  • delegation-templates — Structured subagent dispatch

Domain Packs

CCC organizes skills into domain packs:

  • ccc-design — 39 UI/UX skills
  • ccc-devops — 20 CI/CD and infrastructure skills
  • ccc-security — 8 security hardening skills
  • ccc-testing — 15 testing workflow skills

Creating Custom Skills

You can create project-specific skills using the skill-create workflow. Custom skills live in .claude/skills/ within your project and are available to any Claude Code session in that directory.

Good skills encode: trigger conditions, workflow steps, output format, and verification criteria.

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