Subagents give Claude Code focused specialists with their own instructions, tool limits and context window: a reviewer that can only read, a test writer that can run tests, a security auditor that never edits. Skills give it reusable know-how packaged with scripts and reference files that load only when relevant. This pack ships both, ready to copy.

The 12 subagents - code reviewer, test writer, debugger, security auditor, docs writer, refactorer, performance profiler, migration planner, dependency auditor, accessibility auditor, CI triager and codebase explorer - use the real .claude/agents/*.md format with name, description (written so Claude delegates at the right moments), least-privilege tools, and a tight system prompt with an output contract. The 6 skills use SKILL.md folders: repo health check, changelog from git, ADR writer, test-failure triage (JUnit), TODO triage and a PR review checklist. Every script is dependency-free Python, cross-platform, and was run before shipping.

Includes a short guide on choosing between subagents, skills and slash commands, and on tuning descriptions so delegation works. Claude Code evolves; items note what to verify in the current docs.