Everything Claude Code: performance optimization system for AI agent harnesses

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ecc2

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AGENTS.md

AGENTS.md

CHANGELOG.md

CHANGELOG.md

CLAUDE.md

CLAUDE.md

CODE_OF_CONDUCT.md

CODE_OF_CONDUCT.md

COMMANDS-QUICK-REF.md

COMMANDS-QUICK-REF.md

CONTRIBUTING.md

CONTRIBUTING.md

EVALUATION.md

EVALUATION.md

LICENSE

LICENSE

README.md

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README.zh-CN.md

README.zh-CN.md

REPO-ASSESSMENT.md

REPO-ASSESSMENT.md

RULES.md

RULES.md

SECURITY.md

SECURITY.md

SOUL.md

SOUL.md

SPONSORING.md

SPONSORING.md

SPONSORS.md

SPONSORS.md

TROUBLESHOOTING.md

TROUBLESHOOTING.md

VERSION

VERSION

WORKING-CONTEXT.md

WORKING-CONTEXT.md

agent.yaml

agent.yaml

commitlint.config.js

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ecc_dashboard.py

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eslint.config.js

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the-longform-guide.md

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140K+ stars | 21K+ forks | 170+ contributors | 12+ language ecosystems | Anthropic Hackathon Winner

Language / 语言 / 語言 / Dil / Язык / Ngôn ngữ

English | Português (Brasil) | 简体中文 | 繁體中文 | 日本語 | 한국어 | Türkçe | Русский | Tiếng Việt

The performance optimization system for AI agent harnesses. From an Anthropic hackathon winner.

Not just configs. A complete system: skills, instincts, memory optimization, continuous learning, security scanning, and research-first development. Production-ready agents, skills, hooks, rules, MCP configurations, and legacy command shims evolved over 10+ months of intensive daily use building real products.

Works across Claude Code, Codex, Cursor, OpenCode, Gemini, GitHub Copilot, and other AI agent harnesses.

ECC v2.0.0-rc.1 adds the public Hermes operator story on top of that reusable layer: start with the Hermes setup guide, then review the rc.1 release notes and cross-harness architecture.

The Guides

This repo is the raw code only. The guides explain everything.

Shorthand Guide Setup, foundations, philosophy. Read this first. Longform Guide Token optimization, memory persistence, evals, parallelization. Security Guide Attack vectors, sandboxing, sanitization, CVEs, AgentShield.

Topic What You'll Learn

Token Optimization Model selection, system prompt slimming, background processes

Memory Persistence Hooks that save/load context across sessions automatically

Continuous Learning Auto-extract patterns from sessions into reusable skills

Verification Loops Checkpoint vs continuous evals, grader types, pass@k metrics

Parallelization Git worktrees, cascade method, when to scale instances

Subagent Orchestration The context problem, iterative retrieval pattern

What's New

v2.0.0-rc.1 — Surface Refresh, Operator Workflows, and ECC 2.0 Alpha (Apr 2026)

Dashboard GUI — New Tkinter-based desktop application (ecc_dashboard.py or npm run dashboard) with dark/light theme toggle, font customization, and project logo in header and taskbar.

Public surface synced to the live repo — metadata, catalog counts, plugin manifests, and install-facing docs now match the actual OSS surface: 55 agents, 208 skills, and 72 legacy command shims.

Operator and outbound workflow expansion — brand-voice, social-graph-ranker, connections-optimizer, customer-billing-ops, ecc-tools-cost-audit, google-workspace-ops, project-flow-ops, and workspace-surface-audit round out the operator lane.

Media and launch tooling — manim-video, remotion-video-creation, and upgraded social publishing surfaces make technical explainers and launch content part of the same system.

Framework and product surface growth — nestjs-patterns, richer Codex/OpenCode install surfaces, and expanded cross-harness packaging keep the repo usable beyond Claude Code alone.

ECC 2.0 alpha is in-tree — the Rust control-plane prototype in ecc2/ now builds locally and exposes dashboard, start, sessions, status, stop, resume, and daemon commands. It is usable as an alpha, not yet a general release.

Operator status snapshots — ecc status --markdown --write status.md turns the local state store into a portable handoff covering readiness, active sessions, skill-run health, install health, pending governance events, and linked work items from Linear/GitHub/handoffs. Use ecc work-items upsert ... for manual entries, ecc work-items sync-github --repo owner/repo for PR/issue queue state, and ecc status --exit-code to fail automation when readiness needs attention.

Ecosystem hardening — AgentShield, ECC Tools cost controls, billing portal work, and website refreshes continue to ship around the core plugin instead of drifting into separate silos.

v1.9.0 — Selective Install & Language Expansion (Mar 2026)

Selective install architecture — Manifest-driven install pipeline with install-plan.js and install-apply.js for targeted component installation. State store tracks what's installed and enables incremental updates.

6 new agents — typescript-reviewer, pytorch-build-resolver, java-build-resolver, java-reviewer, kotlin-reviewer, kotlin-build-resolver expand language coverage to 10 languages.

New skills — pytorch-patterns for deep learning workflows, documentation-lookup for API reference research, bun-runtime and nextjs-turbopack for modern JS toolchains, plus 8 operational domain skills and mcp-server-patterns.

Session & state infrastructure — SQLite state store with query CLI, session adapters for structured recording, skill evolution foundation for self-improving skills.

Orchestration overhaul — Harness audit scoring made deterministic, orchestration status and launcher compatibility hardened, observer loop prevention with 5-layer guard.

Observer reliability — Memory explosion fix with throttling and tail sampling, sandbox access fix, lazy-start logic, and re-entrancy guard.

12 language ecosystems — New rules for Java, PHP, Perl, Kotlin/Android/KMP, C++, and Rust join existing TypeScript, Python, Go, and common rules.

Community contributions — Korean and Chinese translations, biome hook optimization, video processing skills, operational skills, PowerShell installer, Antigravity IDE support.

CI hardening — 19 test failure fixes, catalog count enforcement, install manifest validation, and full test suite green.

v1.8.0 — Harness Performance System (Mar 2026)

Harness-first release — ECC is now explicitly framed as an agent harness performance system, not just a config pack.

Hook reliability overhaul — SessionStart root fallback, Stop-phase session summaries, and script-based hooks replacing fragile inline one-liners.

Hook runtime controls — ECC_HOOK_PROFILE=minimal|standard|strict and ECC_DISABLED_HOOKS=... for runtime gating without editing hook files.

New harness commands — /harness-audit, /loop-start, /loop-status, /quality-gate, /model-route.

NanoClaw v2 — model routing, skill hot-load, session branch/search/export/compact/metrics.

Cross-harness parity — behavior tightened across Claude Code, Cursor, OpenCode, and Codex app/CLI.

997 internal tests passing — full suite green after hook/runtime refactor and compatibility updates.

v1.7.0 — Cross-Platform Expansion & Presentation Builder (Feb 2026)

Codex app + CLI support — Direct AGENTS.md-based Codex support, installer targeting, and Codex docs

frontend-slides skill — Zero-dependency HTML presentation builder with PPTX conversion guidance and strict viewport-fit rules

5 new generic business/content skills — article-writing, content-engine, market-research, investor-materials, investor-outreach

Broader tool coverage — Cursor, Codex, and OpenCode support tightened so the same repo ships cleanly across all major harnesses

992 internal tests — Expanded validation and regression coverage across plugin, hooks, skills, and packaging

v1.6.0 — Codex CLI, AgentShield & Marketplace (Feb 2026)

Codex CLI support — New /codex-setup command generates codex.md for OpenAI Codex CLI compatibility

7 new skills — search-first, swift-actor-persistence, swift-protocol-di-testing, regex-vs-llm-structured-text, content-hash-cache-pattern, cost-aware-llm-pipeline, skill-stocktake

AgentShield integration — /security-scan skill runs AgentShield directly from Claude Code; 1282 tests, 102 rules

GitHub Marketplace — ECC Tools GitHub App live at github.com/marketplace/ecc-tools with free/pro/enterprise tiers

30+ community PRs merged — Contributions from 30 contributors across 6 languages

978 internal tests — Expanded validation suite across agents, skills, commands, hooks, and rules

v1.4.1 — Bug Fix (Feb 2026)

Fixed instinct import content loss — parse_instinct_file() was silently dropping all content after frontmatter (Action, Evidence, Examples sections) during /instinct-import. (#148, #161)

v1.4.0 — Multi-Language Rules, Installation Wizard & PM2 (Feb 2026)

Interactive installation wizard — New configure-ecc skill provides guided setup with merge/overwrite detection

PM2 & multi-agent orchestration — 6 new commands (/pm2, /multi-plan, /multi-execute, /multi-backend, /multi-frontend, /multi-workflow) for managing complex multi-service workflows

Multi-language rules architecture — Rules restructured from flat files into common/ + typescript/ + python/ + golang/ directories. Install only the languages you need

Chinese (zh-CN) translations — Complete translation of all agents, commands, skills, and rules (80+ files)

GitHub Sponsors support — Sponsor the project via GitHub Sponsors

Enhanced CONTRIBUTING.md — Detailed PR templates for each contribution type

v1.3.0 — OpenCode Plugin Support (Feb 2026)

Full OpenCode integration — 12 agents, 24 commands, 16 skills with hook support via OpenCode's plugin system (20+ event types)

3 native custom tools — run-tests, check-coverage, security-audit

LLM documentation — llms.txt for comprehensive OpenCode docs

v1.2.0 — Unified Commands & Skills (Feb 2026)

Python/Django support — Django patterns, security, TDD, and verification skills

Java Spring Boot skills — Patterns, security, TDD, and verification for Spring Boot

Session management — /sessions command for session history

Continuous learning v2 — Instinct-based learning with confidence scoring, import/export, evolution

See the full changelog in Releases.

Quick Start

Get up and running in under 2 minutes:

[truncated for AI cost control]