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ECC

182K+ stars | 28K+ forks | 170+ contributors | 12+ language ecosystems | Cross-harness agent workflows

The harness-native operator system for agentic work. Built from real-world multi-harness engineering workflows.

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 Codex, Claude Code, Cursor, OpenCode, Gemini, Zed, 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.

_{OSS stays free. This repo is MIT-licensed forever. ECC Pro is the hosted GitHub App for private repos. Sponsors and Pro subscribers fund the work — that's why a single maintainer ships weekly across 7 harnesses.}

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.

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: 63 agents, 249 skills, and 79 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.
• Itô prediction-market skill pack — ito-market-intelligence, ito-basket-compare, ito-trade-planner, ito-data-atlas-agent, prediction-market-oracle-research, and prediction-market-risk-review add public, non-advisory market/basket workflows while keeping live Itô API access gated and separate from ECC Tools billing.
• Optimization skill pack — parallel-execution-optimizer, benchmark-optimization-loop, data-throughput-accelerator, latency-critical-systems, and recursive-decision-ledger turn repeated speed/recursion prompts into bounded benchmark, throughput, and decision-ledger workflows.
• 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:

Pick one path only

Most Claude Code users should use exactly one install path:

• Recommended default: install the Claude Code plugin, then copy only the rule folders you actually want.
• Use the manual installer only if you want finer-grained control, want to avoid the plugin path entirely, or your Claude Code build has trouble resolving the self-hosted marketplace entry.
• Do not stack install methods. The most common broken setup is: /plugin install first, then install.sh --profile full or npx ecc-install --profile full afterward.

If you already layered multiple installs and things look duplicated, skip straight to Reset / Uninstall ECC.

Low-context / no-hooks path

If hooks feel too global or you only want ECC's rules, agents, commands, and core workflow skills, skip the plugin and use the minimal manual profile:

./install.sh --profile minimal --target claude

.\install.ps1 --profile minimal --target claude
# or
npx ecc-install --profile minimal --target claude

This profile intentionally excludes hooks-runtime.

If you want the normal core profile but need hooks off, use:

./install.sh --profile core --without baseline:hooks --target claude

Add hooks later only if you want runtime enforcement:

./install.sh --target claude --modules hooks-runtime

Find the right components first

If you are not sure which ECC profile or component to install, ask the packaged advisor from any project:

npx ecc consult "security reviews" --target claude

It returns matching components, related profiles, and preview/install commands. Use the preview command before installing if you want to inspect the exact file plan.

For production ML/MLOps workflows, keep the install opt-in and component-scoped:

npx ecc consult "mlops training model deployment" --target claude
npx ecc install --profile minimal --target claude --with capability:machine-learning

Step 1: Install the Plugin (Recommended)

NOTE: The plugin is convenient, but the OSS installer below is still the most reliable path if your Claude Code build has trouble resolving self-hosted marketplace entries.

# Add marketplace
/plugin marketplace add https://github.com/affaan-m/ECC

# Install plugin
/plugin install ecc@ecc

Naming + Migration Note

ECC now has three public identifiers, and they are not interchangeable:

• GitHub source repo: affaan-m/ECC
• Claude marketplace/plugin identifier: ecc@ecc
• npm package: ecc-universal

This is intentional. Anthropic marketplace/plugin installs are keyed by a canonical plugin identifier, so ECC uses ecc@ecc to keep tool names and slash-command namespaces short enough for strict Desktop/API validators. Older posts may still show the former long marketplace identifier; treat that as a legacy alias only. Separately, the npm package stayed on ecc-universal, so npm installs and marketplace installs intentionally use different names.

Step 2: Install Rules Only If You Need Them

WARNING: Important: Claude Code plugins cannot distribute rules automatically.

If you already installed ECC via /plugin install, do not run ./install.sh --profile full, .\install.ps1 --profile full, or npx ecc-install --profile full afterward. The plugin already loads ECC skills, commands, and hooks. Running the full installer after a plugin install copies those same surfaces into your user directories and can create duplicate skills plus duplicate runtime behavior.

For plugin installs, manually copy only the rules/ directories you want under ~/.claude/rules/ecc/. Start with rules/common plus one language or framework pack you actually use. Do not copy every rules directory unless you explicitly want all of that context in Claude.

Use the full installer only when you are doing a fully manual ECC install instead of the plugin path.

If your local Claude setup was wiped or reset, that does not mean you need to repurchase ECC. Start with node scripts/ecc.js list-installed, then run node scripts/ecc.js doctor and node scripts/ecc.js repair before reinstalling anything. That usually restores ECC-managed files without rebuilding your setup. If the problem is account or marketplace access for ECC Tools, handle billing/account recovery separately.

# Clone the repo first
git clone https://github.com/affaan-m/ECC.git
cd ECC

# Install dependencies (pick your package manager)
npm install        # or: pnpm install | yarn install | bun install

# Plugin install path: copy only ECC rules into an ECC-owned namespace
mkdir -p ~/.claude/rules/ecc
cp -R rules/common ~/.claude/rules/ecc/
cp -R rules/typescript ~/.claude/rules/ecc/

# Fully manual ECC install path (use this instead of /plugin install)
# ./install.sh --profile full

# Windows PowerShell

# Plugin install path: copy only ECC rules into an ECC-owned namespace
New-Item -ItemType Directory -Force -Path "$HOME/.claude/rules/ecc" | Out-Null
Copy-Item -Recurse rules/common "$HOME/.claude/rules/ecc/"
Copy-Item -Recurse rules/typescript "$HOME/.claude/rules/ecc/"

# Fully manual ECC install path (use this instead of /plugin install)
# .\install.ps1 --profile full
# npx ecc-install --profile full

For manual install instructions see the README in the rules/ folder. When copying rules manually, copy the whole language directory (for example rules/common or rules/golang), not the files inside it, so relative references keep working and filenames do not collide.

Fully manual install (Fallback)

Use this only if you are intentionally skipping the plugin path:

./install.sh --profile full

.\install.ps1 --profile full
# or
npx ecc-install --profile full

If you choose this path, stop there. Do not also run /plugin install.

Reset / Uninstall ECC

If ECC feels duplicated, intrusive, or broken, do not keep reinstalling it on top of itself.

• Plugin path: remove the plugin from Claude Code, then delete the specific rule folders you manually copied under ~/.claude/rules/ecc/.
• Manual installer / CLI path: from the repo root, preview removal first:

node scripts/uninstall.js --dry-run

Then remove ECC-managed files:

node scripts/uninstall.js

You can also use the lifecycle wrapper:

node scripts/ecc.js list-installed
node scripts/ecc.js doctor
node scripts/ecc.js repair
node scripts/ecc.js uninstall --dry-run

ECC only removes files recorded in its install-state. It will not delete unrelated files it did not install.

If you stacked methods, clean up in this order:

1. Remove the Claude Code plugin install.
2. Run the ECC uninstall command from the repo root to remove install-state-managed files.
3. Delete any extra rule folders you copied manually and no longer want.
4. Reinstall once, using a single path.

Step 3: Start Using

# Skills are the primary workflow surface.
# Existing slash-style command names still work while ECC migrates off commands/.

# Plugin install uses the canonical namespaced form
/ecc:plan "Add user authentication"

# Manual install keeps the shorter slash form:
# /plan "Add user authentication"

# Check available commands
/plugin list ecc@ecc

That's it! You now have access to 63 agents, 249 skills, and 79 legacy command shims.

Dashboard GUI

Launch the desktop dashboard to visually explore ECC components:

npm run dashboard
# or
python3 ./ecc_dashboard.py

Features:

• Tabbed interface: Agents, Skills, Commands, Rules, Settings
• Dark/Light theme toggle
• Font customization (family & size)
• Project logo in header and taskbar
• Search and filter across all components

Multi-model commands require additional setup

WARNING: multi-* commands are not covered by the base plugin/rules install above.

To use /multi-plan, /multi-execute, /multi-backend, /multi-frontend, and /multi-workflow, you must also install the ccg-workflow runtime.

Initialize it with npx ccg-workflow.

That runtime provides the external dependencies these commands expect, including:

• ~/.claude/bin/codeagent-wrapper
• ~/.claude/.ccg/prompts/*

Without ccg-workflow, these multi-* commands will not run correctly.

Cross-Platform Support

This plugin now fully supports Windows, macOS, and Linux, alongside tight integration across major IDEs (Cursor, Zed, OpenCode, Antigravity) and CLI harnesses. All hooks and scripts have been rewritten in Node.js for maximum compatibility.

Package Manager Detection

The plugin automatically detects your preferred package manager (npm, pnpm, yarn, or bun) with the following priority:

1. Environment variable: CLAUDE_PACKAGE_MANAGER
2. Project config: .claude/package-manager.json
3. package.json: packageManager field
4. Lock file: Detection from package-lock.json, yarn.lock, pnpm-lock.yaml, or bun.lockb
5. Global config: ~/.claude/package-manager.json
6. Fallback: First available package manager

To set your preferred package manager:

# Via environment variable
export CLAUDE_PACKAGE_MANAGER=pnpm

# Via global config
node scripts/setup-package-manager.js --global pnpm

# Via project config
node scripts/setup-package-manager.js --project bun

# Detect current setting
node scripts/setup-package-manager.js --detect

Or use the /setup-pm command in Claude Code.

Hook Runtime Controls

Use runtime flags to tune strictness or disable specific hooks temporarily:

# Hook strictness profile (default: standard)
export ECC_HOOK_PROFILE=standard

# Comma-separated hook IDs to disable
export ECC_DISABLED_HOOKS="pre:bash:tmux-reminder,post:edit:typecheck"

# Cap SessionStart additional context (default: 8000 chars)
export ECC_SESSION_START_MAX_CHARS=4000

# Disable SessionStart additional context entirely for low-context/local-model setups
export ECC_SESSION_START_CONTEXT=off

# Keep context/scope/loop warnings but suppress API-rate cost estimates
export ECC_CONTEXT_MONITOR_COST_WARNINGS=off

Windows PowerShell:

[Environment]::SetEnvironmentVariable('ECC_CONTEXT_MONITOR_COST_WARNINGS', 'off', 'User')

What's Inside

This repo is a Claude Code plugin - install it directly or copy components manually.

ECC/
|-- .claude-plugin/   # Plugin and marketplace manifests
|   |-- plugin.json         # Plugin metadata and component paths
|   |-- marketplace.json    # Marketplace catalog for /plugin marketplace add
|
|-- agents/           # 63 specialized subagents for delegation
|   |-- planner.md           # Feature implementation planning
|   |-- architect.md         # System design decisions
|   |-- tdd-guide.md         # Test-driven development
|   |-- code-reviewer.md     # Quality and security review
|   |-- security-reviewer.md # Vulnerability analysis
|   |-- build-error-resolver.md
|   |-- e2e-runner.md        # Playwright E2E testing
|   |-- refactor-cleaner.md  # Dead code cleanup
|   |-- doc-updater.md       # Documentation sync
|   |-- docs-lookup.md       # Documentation/API lookup
|   |-- chief-of-staff.md    # Communication triage and drafts
|   |-- loop-operator.md     # Autonomous loop execution
|   |-- harness-optimizer.md # Harness config tuning
|   |-- cpp-reviewer.md      # C++ code review
|   |-- cpp-build-resolver.md # C++ build error resolution
|   |-- fsharp-reviewer.md   # F# functional code review
|   |-- go-reviewer.md       # Go code review
|   |-- go-build-resolver.md # Go build error resolution
|   |-- python-reviewer.md   # Python code review
|   |-- database-reviewer.md # Database/Supabase review
|   |-- typescript-reviewer.md # TypeScript/JavaScript code review
|   |-- java-reviewer.md     # Java/Spring Boot code review
|   |-- java-build-resolver.md # Java/Maven/Gradle build errors
|   |-- kotlin-reviewer.md   # Kotlin/Android/KMP code review
|   |-- kotlin-build-resolver.md # Kotlin/Gradle build errors
|   |-- harmonyos-app-resolver.md # HarmonyOS/ArkTS app development
|   |-- rust-reviewer.md     # Rust code review
|   |-- rust-build-resolver.md # Rust build error resolution
|   |-- pytorch-build-resolver.md # PyTorch/CUDA training errors
|   |-- mle-reviewer.md      # Production ML pipeline, eval, serving, and monitoring review
|
|-- skills/           # Workflow definitions and domain knowledge
|   |-- coding-standards/           # Language best practices
|   |-- clickhouse-io/              # ClickHouse analytics, queries, data engineering
|   |-- backend-patterns/           # API, database, caching patterns
|   |-- frontend-patterns/          # React, Next.js patterns
|   |-- frontend-slides/            # HTML slide decks and PPTX-to-web presentation workflows (NEW)
|   |-- article-writing/            # Long-form writing in a supplied voice without generic AI tone (NEW)
|   |-- content-engine/             # Multi-platform social content and repurposing workflows (NEW)
|   |-- market-research/            # Source-attributed market, competitor, and investor research (NEW)
|   |-- investor-materials/         # Pitch decks, one-pagers, memos, and financial models (NEW)
|   |-- investor-outreach/          # Personalized fundraising outreach and follow-up (NEW)
|   |-- continuous-learning/        # Legacy v1 Stop-hook pattern extraction
|   |-- continuous-learning-v2/     # Instinct-based learning with confidence scoring
|   |-- iterative-retrieval/        # Progressive context refinement for subagents
|   |-- strategic-compact/          # Manual compaction suggestions (Longform Guide)
|   |-- tdd-workflow/               # TDD methodology
|   |-- security-review/            # Security checklist
|   |-- eval-harness/               # Verification loop evaluation (Longform Guide)
|   |-- verification-loop/          # Continuous verification (Longform Guide)
|   |-- videodb/                   # Video and audio: ingest, search, edit, generate, stream (NEW)
|   |-- golang-patterns/            # Go idioms and best practices
|   |-- golang-testing/             # Go testing patterns, TDD, benchmarks
|   |-- cpp-coding-standards/         # C++ coding standards from C++ Core Guidelines (NEW)
|   |-- cpp-testing/                # C++ testing with GoogleTest, CMake/CTest (NEW)
|   |-- django-patterns/            # Django patterns, models, views (NEW)
|   |-- django-security/            # Django security best practices (NEW)
|   |-- django-tdd/                 # Django TDD workflow (NEW)
|   |-- django-verification/        # Django verification loops (NEW)
|   |-- laravel-patterns/           # Laravel architecture patterns (NEW)
|   |-- laravel-security/           # Laravel security best practices (NEW)
|   |-- laravel-tdd/                # Laravel TDD workflow (NEW)
|   |-- laravel-verification/       # Laravel verification loops (NEW)
|   |-- python-patterns/            # Python idioms and best practices (NEW)
|   |-- python-testing/             # Python testing with pytest (NEW)
|   |-- quarkus-patterns/            # Java Quarkus patterns (NEW)
|   |-- quarkus-security/            # Quarkus security (NEW)
|   |-- quarkus-tdd/                 # Quarkus TDD (NEW)
|   |-- quarkus-verification/        # Quarkus verification (NEW)
|   |-- springboot-patterns/        # Java Spring Boot patterns (NEW)
|   |-- springboot-security/        # Spring Boot security (NEW)
|   |-- springboot-tdd/             # Spring Boot TDD (NEW)
|   |-- springboot-verification/    # Spring Boot verification (NEW)
|   |-- configure-ecc/              # Interactive installation wizard (NEW)
|   |-- security-scan/              # AgentShield security auditor integration (NEW)
|   |-- java-coding-standards/     # Java coding standards (NEW)
|   |-- jpa-patterns/              # JPA/Hibernate patterns (NEW)
|   |-- postgres-patterns/         # PostgreSQL optimization patterns (NEW)
|   |-- nutrient-document-processing/ # Document processing with Nutrient API (NEW)
|   |-- docs/examples/project-guidelines-template.md  # Template for project-specific skills
|   |-- database-migrations/         # Migration patterns (Prisma, Drizzle, Django, Go) (NEW)
|   |-- api-design/                  # REST API design, pagination, error responses (NEW)
|   |-- deployment-patterns/         # CI/CD, Docker, health checks, rollbacks (NEW)
|   |-- docker-patterns/            # Docker Compose, networking, volumes, container security (NEW)
|   |-- e2e-testing/                 # Playwright E2E patterns and Page Object Model (NEW)
|   |-- content-hash-cache-pattern/  # SHA-256 content hash caching for file processing (NEW)
|   |-- cost-aware-llm-pipeline/     # LLM cost optimization, model routing, budget tracking (NEW)
|   |-- regex-vs-llm-structured-text/ # Decision framework: regex vs LLM for text parsing (NEW)
|   |-- swift-actor-persistence/     # Thread-safe Swift data persistence with actors (NEW)
|   |-- swift-protocol-di-testing/   # Protocol-based DI for testable Swift code (NEW)
|   |-- search-first/               # Research-before-coding workflow (NEW)
|   |-- skill-stocktake/            # Audit skills and commands for quality (NEW)
|   |-- liquid-glass-design/         # iOS 26 Liquid Glass design system (NEW)
|   |-- foundation-models-on-device/ # Apple on-device LLM with FoundationModels (NEW)
|   |-- swift-concurrency-6-2/       # Swift 6.2 Approachable Concurrency (NEW)
|   |-- mle-workflow/               # Production ML data contracts, evals, deployment, monitoring (NEW)
|   |-- perl-patterns/             # Modern Perl 5.36+ idioms and best practices (NEW)
|   |-- perl-security/             # Perl security patterns, taint mode, safe I/O (NEW)
|   |-- perl-testing/              # Perl TDD with Test2::V0, prove, Devel::Cover (NEW)
|   |-- autonomous-loops/           # Autonomous loop patterns: sequential pipelines, PR loops, DAG orchestration (NEW)
|   |-- plankton-code-quality/      # Write-time code quality enforcement with Plankton hooks (NEW)
|
|-- commands/         # Maintained slash-entry compatibility; prefer skills/
|   |-- plan.md             # /plan - Implementation planning
|   |-- code-review.md      # /code-review - Quality review
|   |-- build-fix.md        # /build-fix - Fix build errors
|   |-- refactor-clean.md   # /refactor-clean - Dead code removal
|   |-- quality-gate.md     # /quality-gate - Verification gate
|   |-- learn.md            # /learn - Extract patterns mid-session (Longform Guide)
|   |-- learn-eval.md       # /learn-eval - Extract, evaluate, and save patterns (NEW)
|   |-- checkpoint.md       # /checkpoint - Save verification state (Longform Guide)
|   |-- setup-pm.md         # /setup-pm - Configure package manager
|   |-- go-review.md        # /go-review - Go code review (NEW)
|   |-- go-test.md          # /go-test - Go TDD workflow (NEW)
|   |-- go-build.md         # /go-build - Fix Go build errors (NEW)
|   |-- skill-create.md     # /skill-create - Generate skills from git history (NEW)
|   |-- instinct-status.md  # /instinct-status - View learned instincts (NEW)
|   |-- instinct-import.md  # /instinct-import - Import instincts (NEW)
|   |-- instinct-export.md  # /instinct-export - Export instincts (NEW)
|   |-- evolve.md           # /evolve - Cluster instincts into skills
|   |-- prune.md            # /prune - Delete expired pending instincts (NEW)
|   |-- pm2.md              # /pm2 - PM2 service lifecycle management (NEW)
|   |-- multi-plan.md       # /multi-plan - Multi-agent task decomposition (NEW)
|   |-- multi-execute.md    # /multi-execute - Orchestrated multi-agent workflows (NEW)
|   |-- multi-backend.md    # /multi-backend - Backend multi-service orchestration (NEW)
|   |-- multi-frontend.md   # /multi-frontend - Frontend multi-service orchestration (NEW)
|   |-- multi-workflow.md   # /multi-workflow - General multi-service workflows (NEW)
|   |-- sessions.md         # /sessions - Session history management
|   |-- test-coverage.md    # /test-coverage - Test coverage analysis
|   |-- update-docs.md      # /update-docs - Update documentation
|   |-- update-codemaps.md  # /update-codemaps - Update codemaps
|   |-- python-review.md    # /python-review - Python code review (NEW)
|-- legacy-command-shims/   # Opt-in archive for retired shims such as /tdd and /eval
|   |-- tdd.md              # /tdd - Prefer the tdd-workflow skill
|   |-- e2e.md              # /e2e - Prefer the e2e-testing skill
|   |-- eval.md             # /eval - Prefer the eval-harness skill
|   |-- verify.md           # /verify - Prefer the verification-loop skill
|   |-- orchestrate.md      # /orchestrate - Prefer dmux-workflows or multi-workflow
|
|-- rules/            # Always-follow guidelines (copy to ~/.claude/rules/ecc/)
|   |-- README.md            # Structure overview and installation guide
|   |-- common/              # Language-agnostic principles
|   |   |-- coding-style.md    # Immutability, file organization
|   |   |-- git-workflow.md    # Commit format, PR process
|   |   |-- testing.md         # TDD, 80% coverage requirement
|   |   |-- performance.md     # Model selection, context management
|   |   |-- patterns.md        # Design patterns, skeleton projects
|   |   |-- hooks.md           # Hook architecture, TodoWrite
|   |   |-- agents.md          # When to delegate to subagents
|   |   |-- security.md        # Mandatory security checks
|   |-- typescript/          # TypeScript/JavaScript specific
|   |-- python/              # Python specific
|   |-- golang/              # Go specific
|   |-- swift/               # Swift specific
|   |-- php/                 # PHP specific (NEW)
|   |-- arkts/               # HarmonyOS / ArkTS specific
|
|-- hooks/            # Trigger-based automations
|   |-- README.md                 # Hook documentation, recipes, and customization guide
|   |-- hooks.json                # All hooks config (PreToolUse, PostToolUse, Stop, etc.)
|   |-- memory-persistence/       # Session lifecycle hooks (Longform Guide)
|   |-- strategic-compact/        # Compaction suggestions (Longform Guide)
|
|-- scripts/          # Cross-platform Node.js scripts (NEW)
|   |-- lib/                     # Shared utilities
|   |   |-- utils.js             # Cross-platform file/path/system utilities
|   |   |-- package-manager.js   # Package manager detection and selection
|   |-- hooks/                   # Hook implementations
|   |   |-- session-start.js     # Load context on session start
|   |   |-- session-end.js       # Save state on session end
|   |   |-- pre-compact.js       # Pre-compaction state saving
|   |   |-- suggest-compact.js   # Strategic compaction suggestions
|   |   |-- evaluate-session.js  # Extract patterns from sessions
|   |-- setup-package-manager.js # Interactive PM setup
|
|-- tests/            # Test suite (NEW)
|   |-- lib/                     # Library tests
|   |-- hooks/                   # Hook tests
|   |-- run-all.js               # Run all tests
|
|-- contexts/         # Dynamic system prompt injection contexts (Longform Guide)
|   |-- dev.md              # Development mode context
|   |-- review.md           # Code review mode context
|   |-- research.md         # Research/exploration mode context
|
|-- examples/         # Example configurations and sessions
|   |-- CLAUDE.md             # Example project-level config
|   |-- user-CLAUDE.md        # Example user-level config
|   |-- saas-nextjs-CLAUDE.md   # Real-world SaaS (Next.js + Supabase + Stripe)
|   |-- go-microservice-CLAUDE.md # Real-world Go microservice (gRPC + PostgreSQL)
|   |-- django-api-CLAUDE.md      # Real-world Django REST API (DRF + Celery)
|   |-- laravel-api-CLAUDE.md     # Real-world Laravel API (PostgreSQL + Redis) (NEW)
|   |-- rust-api-CLAUDE.md        # Real-world Rust API (Axum + SQLx + PostgreSQL) (NEW)
|
|-- mcp-configs/      # MCP server configurations
|   |-- mcp-servers.json    # GitHub, Supabase, Vercel, Railway, etc.
|
|-- ecc_dashboard.py  # Desktop GUI dashboard (Tkinter)
|
|-- assets/           # Assets for dashboard
|   |-- images/
|       |-- ecc-logo.png
|
|-- marketplace.json  # Self-hosted marketplace config (for /plugin marketplace add)

Ecosystem Tools

Skill Creator

Two ways to generate Claude Code skills from your repository:

Option A: Local Analysis (Built-in)

Use the /skill-create command for local analysis without external services:

/skill-create                    # Analyze current repo
/skill-create --instincts        # Also generate instincts for continuous-learning-v2

This analyzes your git history locally and generates SKILL.md files.

Option B: GitHub App (Advanced)

For advanced features (10k+ commits, auto-PRs, team sharing):

Install GitHub App | ecc.tools

# Comment on any issue:
/skill-creator analyze

# Or auto-triggers on push to default branch

Both options create:

• SKILL.md files - Ready-to-use skills for Claude Code
• Instinct collections - For continuous-learning-v2
• Pattern extraction - Learns from your commit history

AgentShield — Security Auditor

Built at the Claude Code Hackathon (Cerebral Valley x Anthropic, Feb 2026). 1282 tests, 98% coverage, 102 static analysis rules.

Scan your Claude Code configuration for vulnerabilities, misconfigurations, and injection risks.

# Quick scan (no install needed)
npx ecc-agentshield scan

# Auto-fix safe issues
npx ecc-agentshield scan --fix

# Deep analysis with three Opus 4.6 agents
npx ecc-agentshield scan --opus --stream

# Generate secure config from scratch
npx ecc-agentshield init

What it scans: CLAUDE.md, settings.json, MCP configs, hooks, agent definitions, and skills across 5 categories — secrets detection (14 patterns), permission auditing, hook injection analysis, MCP server risk profiling, and agent config review.

The --opus flag runs three Claude Opus 4.6 agents in a red-team/blue-team/auditor pipeline. The attacker finds exploit chains, the defender evaluates protections, and the auditor synthesizes both into a prioritized risk assessment. Adversarial reasoning, not just pattern matching.

Output formats: Terminal (color-graded A-F), JSON (CI pipelines), Markdown, HTML. Exit code 2 on critical findings for build gates.

Use /security-scan in Claude Code to run it, or add to CI with the GitHub Action.

GitHub | npm

Continuous Learning v2

The instinct-based learning system automatically learns your patterns:

/instinct-status        # Show learned instincts with confidence
/instinct-import  # Import instincts from others
/instinct-export        # Export your instincts for sharing
/evolve                 # Cluster related instincts into skills

See skills/continuous-learning-v2/ for full documentation. Keep continuous-learning/ only when you explicitly want the legacy v1 Stop-hook learned-skill flow.

Requirements

Claude Code CLI Version

Minimum version: v2.1.0 or later

This plugin requires Claude Code CLI v2.1.0+ due to changes in how the plugin system handles hooks.

Check your version:

claude --version

Important: Hooks Auto-Loading Behavior

WARNING: For Contributors: Do NOT add a "hooks" field to .claude-plugin/plugin.json. This is enforced by a regression test.

Claude Code v2.1+ automatically loads hooks/hooks.json from any installed plugin by convention. Explicitly declaring it in plugin.json causes a duplicate detection error:

Duplicate hooks file detected: ./hooks/hooks.json resolves to already-loaded file

History: This has caused repeated fix/revert cycles in this repo (#29, #52, #103). The behavior changed between Claude Code versions, leading to confusion. We now have a regression test to prevent this from being reintroduced.

Installation

Option 1: Install as Plugin (Recommended)

The easiest way to use this repo - install as a Claude Code plugin:

# Add this repo as a marketplace
/plugin marketplace add https://github.com/affaan-m/ECC

# Install the plugin
/plugin install ecc@ecc

Or add directly to your ~/.claude/settings.json:

{
  "extraKnownMarketplaces": {
    "ecc": {
      "source": {
        "source": "github",
        "repo": "affaan-m/ECC"
      }
    }
  },
  "enabledPlugins": {
    "ecc@ecc": true
  }
}

This gives you instant access to all commands, agents, skills, and hooks.

Note: The Claude Code plugin system does not support distributing rules via plugins (upstream limitation). You need to install rules manually:

bash Copy

# Clone the repo first
git clone https://github.com/affaan-m/ECC.git
cd ECC

# Option A: User-level rules (applies to all projects)
mkdir -p ~/.claude/rules/ecc
cp -r rules/common ~/.claude/rules/ecc/
cp -r rules/typescript ~/.claude/rules/ecc/   # pick your stack
cp -r rules/python ~/.claude/rules/ecc/
cp -r rules/golang ~/.claude/rules/ecc/
cp -r rules/php ~/.claude/rules/ecc/

# Option B: Project-level rules (applies to current project only)
mkdir -p .claude/rules/ecc
cp -r rules/common .claude/rules/ecc/
cp -r rules/typescript .claude/rules/ecc/     # pick your stack

Option 2: Manual Installation

If you prefer manual control over what's installed:

# Clone the repo
git clone https://github.com/affaan-m/ECC.git
cd ECC

# Copy agents to your Claude config
cp agents/*.md ~/.claude/agents/

# Copy rules directories (common + language-specific)
mkdir -p ~/.claude/rules/ecc
cp -r rules/common ~/.claude/rules/ecc/
cp -r rules/typescript ~/.claude/rules/ecc/   # pick your stack
cp -r rules/python ~/.claude/rules/ecc/
cp -r rules/golang ~/.claude/rules/ecc/
cp -r rules/php ~/.claude/rules/ecc/
cp -r rules/arkts ~/.claude/rules/ecc/

# Copy skills first (primary workflow surface)
# Recommended (new users): core/general skills only
mkdir -p ~/.claude/skills/ecc
cp -r .agents/skills/* ~/.claude/skills/ecc/
cp -r skills/search-first ~/.claude/skills/ecc/

# Optional: add niche/framework-specific skills only when needed
# for s in django-patterns django-tdd laravel-patterns springboot-patterns quarkus-patterns; do
# cp -r skills/$s ~/.claude/skills/ecc/
# done

# Optional: keep maintained slash-command compatibility during migration
mkdir -p ~/.claude/commands
cp commands/*.md ~/.claude/commands/

# Retired shims live in legacy-command-shims/commands/.
# Copy individual files from there only if you still need old names such as /tdd.

Install hooks

Do not copy the raw repo hooks/hooks.json into ~/.claude/settings.json or ~/.claude/hooks/hooks.json. That file is plugin/repo-oriented and is meant to be installed through the ECC installer or loaded as a plugin, so raw copying is not a supported manual install path.

Use the installer to install only the Claude hook runtime so command paths are rewritten correctly:

# macOS / Linux
bash ./install.sh --target claude --modules hooks-runtime

# Windows PowerShell
pwsh -File .\install.ps1 --target claude --modules hooks-runtime

That writes resolved hooks to ~/.claude/hooks/hooks.json and leaves any existing ~/.claude/settings.json untouched.

If you installed ECC via /plugin install, do not copy those hooks into settings.json. Claude Code v2.1+ already auto-loads plugin hooks/hooks.json, and duplicating them in settings.json causes duplicate execution and cross-platform hook conflicts.

Windows note: the Claude config directory is %USERPROFILE%\\.claude, not ~/claude.

Configure MCPs

Claude plugin installs intentionally do not auto-enable ECC's bundled MCP server definitions. This avoids overlong plugin MCP tool names on strict third-party gateways while keeping manual MCP setup available.

Use Claude Code's /mcp command or CLI-managed MCP setup for live Claude Code server changes. Use /mcp for Claude Code runtime disables; Claude Code persists those choices in ~/.claude.json.

For repo-local MCP access, copy desired MCP server definitions from mcp-configs/mcp-servers.json into a project-scoped .mcp.json.

If you already run your own copies of ECC-bundled MCPs, set:

export ECC_DISABLED_MCPS="github,context7,exa,playwright,sequential-thinking,memory"

ECC-managed install and Codex sync flows will skip or remove those bundled servers instead of re-adding duplicates. ECC_DISABLED_MCPS is an ECC install/sync filter, not a live Claude Code toggle.

Important: Replace YOUR_*_HERE placeholders with your actual API keys.

Key Concepts

Agents

Subagents handle delegated tasks with limited scope. Example:

---
name: code-reviewer
description: Reviews code for quality, security, and maintainability
tools: ["Read", "Grep", "Glob", "Bash"]
model: opus
---

You are a senior code reviewer...

Skills

Skills are the primary workflow surface. They can be invoked directly, suggested automatically, and reused by agents. ECC still ships maintained commands/ during migration, while retired short-name shims live under legacy-command-shims/ for explicit opt-in only. New workflow development should land in skills/ first.

# TDD Workflow

1. Define interfaces first
2. Write failing tests (RED)
3. Implement minimal code (GREEN)
4. Refactor (IMPROVE)
5. Verify 80%+ coverage

Hooks

Hooks fire on tool events. Example - warn about console.log:

{
  "matcher": "tool == \"Edit\" && tool_input.file_path matches \"\\\\.(ts|tsx|js|jsx)$\"",
  "hooks": [{
    "type": "command",
    "command": "#!/bin/bash\ngrep -n 'console\\.log' \"$file_path\" && echo '[Hook] Remove console.log' >&2"
  }]
}

Rules

Rules are always-follow guidelines, organized into common/ (language-agnostic) + language-specific directories:

rules/
  common/          # Universal principles (always install)
  typescript/      # TS/JS specific patterns and tools
  python/          # Python specific patterns and tools
  golang/          # Go specific patterns and tools
  swift/           # Swift specific patterns and tools
  php/             # PHP specific patterns and tools
  arkts/           # HarmonyOS / ArkTS patterns and constraints

See rules/README.md for installation and structure details.

Which Agent Should I Use?

Not sure where to start? Use this quick reference. Skills are the canonical workflow surface; maintained slash entries stay available for command-first workflows.

Common Workflows

Slash forms below are shown where they remain part of the maintained command surface. Retired short-name shims such as /tdd and /eval live in legacy-command-shims/ for explicit opt-in only.

Starting a new feature:

/ecc:plan "Add user authentication with OAuth"
                                              → planner creates implementation blueprint
tdd-workflow skill                            → tdd-guide enforces write-tests-first
/code-review                                  → code-reviewer checks your work

Fixing a bug:

tdd-workflow skill                            → tdd-guide: write a failing test that reproduces it
                                              → implement the fix, verify test passes
/code-review                                  → code-reviewer: catch regressions

Preparing for production:

/security-scan                                → security-reviewer: OWASP Top 10 audit
e2e-testing skill                             → e2e-runner: critical user flow tests
/test-coverage                                → verify 80%+ coverage

FAQ

/plugin list ecc@ecc

export ANTHROPIC_BASE_URL=https://your-gateway.example.com
export ANTHROPIC_AUTH_TOKEN=your-token
claude

# Just agents
cp agents/*.md ~/.claude/agents/

# Just rules
mkdir -p ~/.claude/rules/ecc/
cp -r rules/common ~/.claude/rules/ecc/

Running Tests

The plugin includes a comprehensive test suite:

# Run all tests
node tests/run-all.js

# Run individual test files
node tests/lib/utils.test.js
node tests/lib/package-manager.test.js
node tests/hooks/hooks.test.js

Contributing

Contributions are welcome and encouraged.

This repo is meant to be a community resource. If you have:

• Useful agents or skills
• Clever hooks
• Better MCP configurations
• Improved rules

Please contribute! See CONTRIBUTING.md for guidelines.

Ideas for Contributions

• Language-specific skills (Rust, C#, Kotlin, Java) — Go, Python, Perl, Swift, TypeScript, and HarmonyOS/ArkTS already included
• Framework-specific configs (Rails, FastAPI) — Django, NestJS, Spring Boot, and Laravel already included
• DevOps agents (Kubernetes, Terraform, AWS, Docker)
• Testing strategies (different frameworks, visual regression)
• Domain-specific knowledge (ML, data engineering, mobile)

Community Ecosystem Notes

These are not bundled with ECC and are not audited by this repo, but they are worth knowing about if you are exploring the broader Claude Code skills ecosystem:

• claude-seo — SEO-focused skill and agent collection
• claude-ads — Ad-audit and paid-growth workflow collection
• claude-cybersecurity — Security-oriented skill and agent collection

Cursor IDE Support

ECC provides Cursor IDE support with hooks, rules, agents, skills, commands, and MCP configs adapted for Cursor's project layout.

Quick Start (Cursor)

# macOS/Linux
./install.sh --target cursor typescript
./install.sh --target cursor python golang swift php

# Windows PowerShell
.\install.ps1 --target cursor typescript
.\install.ps1 --target cursor python golang swift php

What's Included

Cursor Loading Notes

ECC does not install root AGENTS.md into .cursor/. Cursor treats nested AGENTS.md files as directory context, so copying ECC's repo identity into a host project would pollute that project.

Cursor-native loading behavior can vary by Cursor build. ECC installs agents as .cursor/agents/ecc-*.md; if your Cursor build does not expose project agents, those files still work as explicit reference definitions instead of hidden global prompt context.

Hook Architecture (DRY Adapter Pattern)

Cursor has more hook events than Claude Code (20 vs 8). The .cursor/hooks/adapter.js module transforms Cursor's stdin JSON to Claude Code's format, allowing existing scripts/hooks/*.js to be reused without duplication.

Cursor stdin JSON → adapter.js → transforms → scripts/hooks/*.js
                                              (shared with Claude Code)

Key hooks:

• beforeShellExecution — Blocks dev servers outside tmux (exit 2), git push review
• afterFileEdit — Auto-format + TypeScript check + console.log warning
• beforeSubmitPrompt — Detects secrets (sk-, ghp_, AKIA patterns) in prompts
• beforeTabFileRead — Blocks Tab from reading .env, .key, .pem files (exit 2)
• beforeMCPExecution / afterMCPExecution — MCP audit logging

Rules Format

Cursor rules use YAML frontmatter with description, globs, and alwaysApply:

---
description: "TypeScript coding style extending common rules"
globs: ["**/*.ts", "**/*.tsx", "**/*.js", "**/*.jsx"]
alwaysApply: false
---

Codex macOS App + CLI Support

ECC provides first-class Codex support for both the macOS app and CLI, with a reference configuration, Codex-specific AGENTS.md supplement, and shared skills.

Quick Start (Codex App + CLI)

# Run Codex CLI in the repo — AGENTS.md and .codex/ are auto-detected
codex

# Automatic setup: sync ECC assets (AGENTS.md, skills, MCP servers) into ~/.codex
npm install && bash scripts/sync-ecc-to-codex.sh
# or: pnpm install && bash scripts/sync-ecc-to-codex.sh
# or: yarn install && bash scripts/sync-ecc-to-codex.sh
# or: bun install && bash scripts/sync-ecc-to-codex.sh

# Or manually: copy the reference config to your home directory
cp .codex/config.toml ~/.codex/config.toml

The sync script safely merges ECC MCP servers into your existing ~/.codex/config.toml using an add-only strategy — it never removes or modifies your existing servers. Run with --dry-run to preview changes, or --update-mcp to force-refresh ECC servers to the latest recommended config.

For Context7, ECC uses the canonical Codex section name [mcp_servers.context7] while still launching the @upstash/context7-mcp package. If you already have a legacy [mcp_servers.context7-mcp] entry, --update-mcp migrates it to the canonical section name.

Codex macOS app:

• Open this repository as your workspace.
• The root AGENTS.md is auto-detected.
• .codex/config.toml and .codex/agents/*.toml work best when kept project-local.
• The reference .codex/config.toml intentionally does not pin model or model_provider, so Codex uses its own current default unless you override it.
• Optional: copy .codex/config.toml to ~/.codex/config.toml for global defaults; keep the multi-agent role files project-local unless you also copy .codex/agents/.

What's Included

Skills

Skills at .agents/skills/ are auto-loaded by Codex:

Canonical Anthropic skills such as claude-api, frontend-design, and skill-creator are intentionally not re-bundled here. Install those from anthropics/skills when you want the official versions.

Key Limitation

Codex does not yet provide Claude-style hook execution parity. ECC enforcement there is instruction-based via AGENTS.md, optional model_instructions_file overrides, and sandbox/approval settings.

Multi-Agent Support

Current Codex builds support stable multi-agent workflows.

• Enable features.multi_agent = true in .codex/config.toml
• Define roles under [agents.<name>]
• Point each role at a file under .codex/agents/
• Use /agent in the CLI to inspect or steer child agents

ECC ships three sample role configs:

Zed Support

ECC provides Zed project support through a conservative .zed adapter for project-local settings, flattened rules, agents, commands, and skills.

./install.sh --profile minimal --target zed

.\install.ps1 --profile minimal --target zed

The adapter writes ECC-managed files under .zed/ and keeps BYOK/OpenRouter credentials out of the repo. Configure Zed account or API keys through Zed's own settings UI or your local user settings.

OpenCode Support

ECC provides full OpenCode support including plugins and hooks.

Quick Start

# Install OpenCode
npm install -g opencode

# Run in the repository root
opencode

The configuration is automatically detected from .opencode/opencode.json.

Feature Parity

Hook Support via Plugins

OpenCode's plugin system is MORE sophisticated than Claude Code with 20+ event types:

Additional OpenCode events: file.edited, file.watcher.updated, message.updated, lsp.client.diagnostics, tui.toast.show, and more.

Maintained Slash Entries

Plugin Installation

Option 1: Use directly

cd ECC
opencode

Option 2: Install as npm package

npm install ecc-universal

Then add to your opencode.json:

{
  "plugin": ["ecc-universal"]
}

That npm plugin entry enables ECC's published OpenCode plugin module (hooks/events and plugin tools). It does not automatically add ECC's full command/agent/instruction catalog to your project config.

For the full ECC OpenCode setup, either:

• run OpenCode inside this repository, or
• copy the bundled .opencode/ config assets into your project and wire the instructions, agent, and command entries in opencode.json

Documentation

• Migration Guide: .opencode/MIGRATION.md
• OpenCode Plugin README: .opencode/README.md
• Consolidated Rules: .opencode/instructions/INSTRUCTIONS.md
• LLM Documentation: llms.txt (complete OpenCode docs for LLMs)

GitHub Copilot Support

ECC provides GitHub Copilot support for VS Code via Copilot Chat's native instruction and prompt file system — no extra tooling required.

What's Included

Quick Start (GitHub Copilot)

The files are already in place — open any repo that contains this project and GitHub Copilot Chat will automatically pick up .github/copilot-instructions.md. The committed .vscode/settings.json enables chat.promptFiles so VS Code can load the reusable prompts from .github/prompts/.

To use the workflow prompts in Copilot Chat:

1. Open the Copilot Chat panel in VS Code.
2. Click the paperclip / attach icon and select Prompt..., or type / and choose a prompt.
3. Select the prompt (e.g. plan, tdd, code-review).

How It Works

GitHub Copilot in VS Code reads two types of files automatically:

• .github/copilot-instructions.md — repository-level instructions, always injected into every Copilot Chat request. Contains ECC's core coding standards, security checklist, testing requirements, and git workflow.
• .github/prompts/*.prompt.md — reusable prompt files users invoke on demand. Each prompt walks Copilot through a specific ECC workflow (plan → TDD → review → ship).

The .vscode/settings.json adds per-task instruction overlays so Copilot receives the right context depending on whether you are generating code, writing tests, reviewing a selection, or drafting a commit message.

Feature Coverage

Limitations

GitHub Copilot does not have a hook system or a subagent API, so ECC's hook automations (auto-format, TypeScript check, session persistence, dev-server guard) and agent delegation are unavailable. The instruction and prompt layer still brings the full ECC coding philosophy — standards, security, TDD, and workflow — into every Copilot Chat session.

Cross-Tool Feature Parity

ECC is the first plugin to maximize every major AI coding tool. Here's how each harness compares:

Key architectural decisions:

• AGENTS.md at root is the universal cross-tool file (read by Claude Code, Cursor, Codex, and OpenCode — GitHub Copilot uses .github/copilot-instructions.md instead)
• DRY adapter pattern lets Cursor reuse Claude Code's hook scripts without duplication
• Skills format (SKILL.md with YAML frontmatter) works across Claude Code, Codex, and OpenCode
• Codex's lack of hooks is compensated by AGENTS.md, optional model_instructions_file overrides, and sandbox permissions

Background

I've been using Claude Code since the experimental rollout. Won the Anthropic x Forum Ventures hackathon in Sep 2025 with @DRodriguezFX — built zenith.chat entirely using Claude Code.

These configs are battle-tested across multiple production applications.

Token Optimization

Claude Code usage can be expensive if you don't manage token consumption. These settings significantly reduce costs without sacrificing quality.

Recommended Settings

Add to ~/.claude/settings.json:

{
  "model": "sonnet",
  "env": {
    "MAX_THINKING_TOKENS": "10000",
    "CLAUDE_AUTOCOMPACT_PCT_OVERRIDE": "50"
  }
}

Switch to Opus only when you need deep architectural reasoning:

/model opus

Daily Workflow Commands

If you use a Claude subscription and the context monitor's API-rate estimates are not useful, set ECC_CONTEXT_MONITOR_COST_WARNINGS=off. This only suppresses the agent-facing cost warnings; it does not disable context exhaustion, scope, or loop warnings.

Strategic Compaction

The strategic-compact skill (included in this plugin) suggests /compact at logical breakpoints instead of relying on auto-compaction at 95% context. See skills/strategic-compact/SKILL.md for the full decision guide.

When to compact:

• After research/exploration, before implementation
• After completing a milestone, before starting the next
• After debugging, before continuing feature work
• After a failed approach, before trying a new one

When NOT to compact:

• Mid-implementation (you'll lose variable names, file paths, partial state)

Context Window Management

Critical: Don't enable all MCPs at once. Each MCP tool description consumes tokens from your 200k window, potentially reducing it to ~70k.

• Keep under 10 MCPs enabled per project
• Keep under 80 tools active
• Use /mcp to disable unused Claude Code MCP servers; those runtime choices persist in ~/.claude.json
• Use ECC_DISABLED_MCPS only to filter ECC-generated MCP configs during install/sync flows

Agent Teams Cost Warning

Agent Teams spawns multiple context windows. Each teammate consumes tokens independently. Only use for tasks where parallelism provides clear value (multi-module work, parallel reviews). For simple sequential tasks, subagents are more token-efficient.

WARNING: Important Notes

Token Optimization

Hitting daily limits? See the Token Optimization Guide for recommended settings and workflow tips.

Quick wins:

// ~/.claude/settings.json
{
  "model": "sonnet",
  "env": {
    "MAX_THINKING_TOKENS": "10000",
    "CLAUDE_AUTOCOMPACT_PCT_OVERRIDE": "50",
    "CLAUDE_CODE_SUBAGENT_MODEL": "haiku"
  }
}

Use /clear between unrelated tasks, /compact at logical breakpoints, and /cost to monitor spending.

Customization

These configs work for my workflow. You should:

1. Start with what resonates
2. Modify for your stack
3. Remove what you don't use
4. Add your own patterns

Community Projects

Projects built on or inspired by ECC:

Built something with ECC? Open a PR to add it here.

Sponsors

This project is free and open source. Sponsors help keep it maintained and growing.

Become a Sponsor | Sponsor Tiers | Sponsorship Program

Star History

Links

• Shorthand Guide (Start Here): The Shorthand Guide to Everything Claude Code
• Longform Guide (Advanced): The Longform Guide to Everything Claude Code
• Security Guide: Security Guide | Thread
• Follow: @affaanmustafa

License

MIT - Use freely, modify as needed, contribute back if you can.

Star this repo if it helps. Read both guides. Build something great.

🚀 Quick Start

# Clone the repo first
git clone https://github.com/affaan-m/ECC.git
cd ECC

# Install dependencies (pick your package manager)
npm install        # or: pnpm install | yarn install | bun install

# Plugin install path: copy only ECC rules into an ECC-owned namespace
mkdir -p ~/.claude/rules/ecc
cp -R rules/common ~/.claude/rules/ecc/
cp -R rules/typescript ~/.claude/rules/ecc/

# Fully manual ECC install path (use this instead of /plugin install)
# ./install.sh --profile full