# Everything Claude Code: 28 Agents and 125 Skills to Cut Costs

> Everything Claude Code is an optimization system with 28 agents, 125 skills, and 60 commands that can cut AI coding costs by 60% or more.

Published: 2026-03-24
URL: https://daniliants.com/insights/github-affaan-meverything-claude-code-the-agent-harness-performance/
Tags: claude-code, ai-agents, developer-tools, prompt-engineering, code-review, tdd, mcp-servers, ai-workflow

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## Summary

Everything Claude Code (ECC) is a comprehensive, open-source performance optimization system for AI coding agents (Claude Code, Cursor, Codex, OpenCode) with 28 agents, 125 skills, 60 commands, hooks, rules, and MCP configs built over 10+ months of production use. It goes far beyond config files - providing continuous learning via instinct-based pattern extraction, cross-harness parity, security scanning (AgentShield), and token optimization strategies that can cut costs by 60%+.

## Key Insight

- **Scale of the system:** 28 specialized subagents (planner, architect, TDD guide, security reviewer, build-error resolvers per language), 125 skills across 12 language ecosystems, 60 slash commands. 997 internal tests passing.
- **Continuous learning is the standout feature:** The instinct-based system (v2) auto-extracts patterns from sessions, scores them with confidence levels, and can cluster related instincts into reusable skills via `/evolve`. This is self-improving AI tooling.
- **Cross-harness parity matters:** ECC works across Claude Code, Cursor (15 hook events vs Claude's 8), Codex (app + CLI), OpenCode (11 events, 6 native custom tools), and Antigravity. AGENTS.md at root is the universal cross-tool file. DRY adapter pattern lets Cursor reuse Claude Code's hook scripts.
- **Token optimization is critical and often missed:** Each MCP tool description eats context window tokens - can reduce 200k to ~70k. Recommended: keep under 10 MCPs, under 80 tools active. Setting `model: sonnet` + `MAX_THINKING_TOKENS: 10000` + `CLAUDE_AUTOCOMPACT_PCT_OVERRIDE: 50` cuts costs ~60%.
- **Security scanning (AgentShield):** Scans CLAUDE.md, settings.json, MCP configs, hooks, agent definitions across 5 categories. The `--opus` flag runs three Opus agents in red-team/blue-team/auditor pipeline for adversarial analysis, not just pattern matching.
- **Selective install architecture:** Manifest-driven install pipeline with `install-plan.js` and `install-apply.js` for targeted component installation. State store tracks what is installed, enabling incremental updates.
- **Hook runtime controls:** `ECC_HOOK_PROFILE=minimal|standard|strict` and `ECC_DISABLED_HOOKS=...` allow runtime gating without editing hook files.
- **Strategic compaction > auto-compaction:** Compact after research/exploration before implementation, after milestones, after debugging - not mid-implementation where you lose variable names and partial state.