Everything Claude Code goes far beyond a configuration bundle by providing a complete agent harness performance system for AI-assisted software development. The project ships 30 specialized subagents covering domains from API design and architecture decision records to Rust reviewing and Spring Boot patterns, alongside 136 workflow skills and 60 slash commands that can be selectively installed through a manifest-driven pipeline. The selective install architecture means developers pick only the components relevant to their stack rather than loading everything, with state tracking enabling incremental updates as the project evolves.
AgentShield forms the security backbone of the system with 102 security rules and 912 tests across all protection layers. It includes a CVE database tracking 25+ known MCP vulnerabilities, supply chain verification, runtime monitoring, and a PR security gate for automated scanning during code review. The hook system provides session-level automation with configurable profiles ranging from minimal to strict enforcement, and runtime controls let developers gate specific hooks without editing configuration files. The continuous learning subsystem uses instinct-based pattern extraction with confidence scoring to help agents improve over time.
Cross-harness compatibility sets Everything Claude Code apart from single-tool configurations. The system maintains behavioral parity across Claude Code, Cursor, OpenCode, and Codex through shared hooks, commands, and skill execution semantics. With 133,000+ GitHub stars and 19,000+ forks, it has become one of the fastest-growing developer tools of 2026. The project supports 12 language ecosystems including TypeScript, Python, Rust, Go, Java, Kotlin, and C++ with dedicated rules, agents, or skills for each, making it a practical choice for polyglot development teams.
