> ## Documentation Index > Fetch the complete documentation index at: https://vietbui.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Everything Claude Code (ECC) > Agent harness performance system by Affaan Mustafa (@affaanmustafa). MIT licensed. Claude Code plugin + npm package + manual install. Anthropic Hackathon win… # Everything Claude Code (ECC) Agent harness performance system by Affaan Mustafa (@affaanmustafa). MIT licensed. Claude Code plugin + npm package + manual install. Anthropic Hackathon winner (Feb 2026). * GitHub: `affaan-m/everything-claude-code` * Plugin ID: `ecc@ecc` * npm: `ecc-universal` *** ## What It Is A layered plugin for Claude Code (and 8 other harnesses) that adds: 60 agents, 232 skills, structured rules, hook-based automations, continuous learning, and security scanning. Framed explicitly as a "harness performance system" — the claim is that harness quality determines output quality as much as model quality does. *** ## Install Paths **Plugin path (recommended for most users):** ```bash theme={null} /plugin marketplace add https://github.com/affaan-m/everything-claude-code /plugin install ecc@ecc # Then manually copy rules (plugins can't distribute rules): mkdir -p ~/.claude/rules/ecc cp -r everything-claude-code/rules/common ~/.claude/rules/ecc/ cp -r everything-claude-code/rules/typescript ~/.claude/rules/ecc/ # pick your stack ``` **Manual install (fallback):** ```bash theme={null} ./install.sh --profile full # or: npx ecc-install --profile full ``` **Do not stack methods** — plugin + manual full install causes duplicates. **Selective (minimal):** ```bash theme={null} ./install.sh --profile minimal --target claude # rules + agents only, no hooks ``` *** ## Cross-Harness Support Matrix | Harness | Mechanism | Hook parity | Agent parity | | ----------------- | ------------------------------------------- | ------------------------ | ---------------------------- | | Claude Code | Native plugin | 8 events | 60 agents | | Cursor | DRY adapter (transforms to CC format) | 15 events | 48 agents (prefixed `ecc-*`) | | OpenCode | `ecc-universal` npm plugin | 11 events (more than CC) | 12 agents | | Codex (app + CLI) | AGENTS.md + `.codex/` | None (instruction-based) | Shared via AGENTS.md | | GitHub Copilot | `.github/copilot-instructions.md` + prompts | None | None | | Zed | `.zed/` adapter | Not available | Project-local | | Antigravity | `.agent/` adapter | Per Antigravity spec | Shared | | JoyCode/CodeBuddy | Project-local selective install | Per CodeBuddy spec | Shared | | Qwen CLI | Home-directory adapter | Per Qwen spec | Shared | **DRY adapter pattern**: Cursor's `adapter.js` transforms Cursor's stdin JSON to Claude Code's format, allowing the same `scripts/hooks/*.js` to run on both harnesses without duplication. OpenCode's plugin hook system has more events than Claude Code (11 vs 8 native types). *** ## Component Summary | Component | Count | Surface | | ----------------------- | ------ | ------------------------------------------------------------------------- | | Agents | 60 | `agents/*.md` | | Skills | 232 | `skills/` | | Commands (maintained) | 75 | `commands/` | | Rules (language packs) | 7 dirs | `rules/common`, `typescript`, `python`, `golang`, `swift`, `php`, `arkts` | | Hook scripts | 20+ | `scripts/hooks/`, `hooks/hooks.json` | | Context injection modes | 3 | `contexts/dev.md`, `review.md`, `research.md` | | CLAUDE.md examples | 7 | `examples/` | All counts self-reported from README (unverified independently). *** ## Key Skills | Skill | Purpose | | ------------------------ | ---------------------------------------------------- | | `tdd-workflow` | Red-green-improve cycle, 80%+ coverage | | `eval-harness` | Eval-driven development, checkpoint/continuous modes | | `verification-loop` | Build, test, lint, typecheck, security | | `strategic-compact` | When/when-not to compact context | | `continuous-learning-v2` | Instinct-based learning with confidence scoring | | `security-scan` | Runs AgentShield from within Claude Code | | `search-first` | Research-before-coding workflow | | `iterative-retrieval` | Progressive context refinement for subagents | | `skill-create` | Generate skills from git history | *** ## Hook Runtime Controls ```bash theme={null} export ECC_HOOK_PROFILE=minimal|standard|strict # enforcement level export ECC_DISABLED_HOOKS="pre:bash:tmux-reminder" # comma-separated IDs export ECC_SESSION_START_MAX_CHARS=4000 # cap context injection (default: 8000) export ECC_SESSION_START_CONTEXT=off # disable entirely for local/low-context ``` *** ## Token Optimization Recommended `~/.claude/settings.json`: ```json theme={null} { "model": "sonnet", "env": { "MAX_THINKING_TOKENS": "10000", "CLAUDE_AUTOCOMPACT_PCT_OVERRIDE": "50", "CLAUDE_CODE_SUBAGENT_MODEL": "haiku" } } ``` | Setting | Default | Recommended | Impact | | --------------------------------- | -------- | ----------- | ---------------------------------------------------- | | `model` | opus | sonnet | \~60% cost reduction (claimed) | | `MAX_THINKING_TOKENS` | 31,999 | 10,000 | \~70% reduction in hidden thinking cost (claimed) | | `CLAUDE_AUTOCOMPACT_PCT_OVERRIDE` | 95 | 50 | Earlier compaction → better quality in long sessions | | `CLAUDE_CODE_SUBAGENT_MODEL` | inherits | haiku | Subagents use cheaper model | All impact numbers claimed from ECC README; not independently verified. **MCP context cost**: too many active MCP servers can reduce the effective 200K context window to \~70K (claimed, unverified). Recommended cap: under 10 MCPs, under 80 active tools. **Strategic compaction** (via `strategic-compact` skill) — compact at: end of research/exploration phase, after completing a milestone, after a failed approach. Do NOT compact mid-implementation (lose variable names, file paths, partial state). *** ## ECC 2.0 (Alpha) Rust control plane in `ecc2/` — builds locally, exposes `dashboard`, `start`, `sessions`, `status`, `stop`, `resume`, `daemon`. Not a general release; alpha quality. Tkinter desktop dashboard also available via `npm run dashboard` or `python3 ecc_dashboard.py`. *** ## Related Wiki Pages * [AgentShield](/entities/agentshield) — ECC's security scanning component * [Instinct Clustering (Homunculus Pattern)](/concepts/instinct-clustering) — continuous learning v2 pattern * [Claude Code → Cross-Platform Migration Matrix](/comparisons/cc-to-cross-platform-migration) — cross-harness migration matrix * [Agent Harness](/concepts/agent-harness) — the broader harness concept * [Context Compression Strategies](/concepts/context-compression) — strategic compaction (ECC's `strategic-compact` skill)