affaan-m/ECC

Add directly to your ~/.claude/settings.json:

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

This gives you the same result as the two /plugin commands above.

ECC 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.

npm releases are cut per version tag, not per commit, so ecc-universal tracks releases (2.1, 2.2, ...) rather than every push to main. Install from git if you want the bleeding edge.

If your local Claude setup was wiped or reset, that does not mean you need to repurchase anything. Start with node scripts/ecc.js list-installed, then run node scripts/ecc.js doctor and node scripts/ecc.js repair before reinstalling. That usually restores ECC-managed files without rebuilding your setup.

Clone ECC once, then choose the target that matches your harness:

git clone https://github.com/affaan-m/ECC.git
cd ECC

GitHub Copilot support is already included in this repository. .github/copilot-instructions.md provides the instruction layer, .github/prompts/ contains the reusable /plan, /tdd, /security-review, /build-fix, and /refactor prompts, and .vscode/settings.json enables chat.promptFiles.

For a harness without a native ECC target, use the manual adaptation guide. It explains how to carry a small set of ECC skills and workflow instructions into chat-style tools without pretending hooks or native skill discovery are available.

Cursor installs agent definitions under .cursor/agents/ecc-*.md. Cursor-native loading behavior can vary by Cursor build. ECC does not install root AGENTS.md into .cursor/. The adapter keeps Cursor's context scoped to its native rules and agent surfaces.

Deep per-harness notes (feature parity, hook adapters, limitations) live in Platform Support below.

Low-context / no-hooks path

Use this when you want ECC's rules, agents, commands, platform config, and core workflows without runtime hooks:

./install.sh --profile minimal --target claude
# or, without cloning first
npx ecc-install --profile minimal --target claude

Windows:

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

This profile intentionally excludes hooks-runtime.

Claude manual installs place each skill directly under ~/.claude/skills/<skill-name>/ (or .claude/skills/<skill-name>/ for claude-project) so Claude Code can discover it. When upgrading an older ECC manual install, the installer migrates only nested skills/ecc/ files recorded in ECC install-state. If a flat skill directory is user-owned, ECC preserves it, prints a conflict warning, and keeps any older managed copy tracked for a safe uninstall instead of overwriting user files.

For the normal core profile with hooks disabled:

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

Add the hook runtime later only if you want it:

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

Find the right components first

Ask the packaged advisor which components match your work:

npx ecc-universal 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.

You can also install explicit skills or capabilities:

./install.sh --target claude --skills tdd-workflow,security-review
npx ecc-universal install --profile minimal --target claude --with capability:machine-learning

Manual component-by-component copying also works. Each component is fully independent:

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

# 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

# Core/general skills only (Claude Code loads skills from direct children
# of ~/.claude/skills; do not nest manual installs under ~/.claude/skills/ecc/)
mkdir -p ~/.claude/skills
cp -r .agents/skills/* ~/.claude/skills/
cp -r skills/search-first ~/.claude/skills/

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

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

Use project-local rules when ECC's standards should apply to one repository rather than every Claude Code session:

cd your-project
mkdir -p .claude/rules/ecc
cp -R /path/to/ECC/rules/common .claude/rules/ecc/
cp -R /path/to/ECC/rules/typescript .claude/rules/ecc/

Rules are always-loaded context, so begin with common and one pack for the stack you actually use. 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.

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

git clone https://github.com/affaan-m/ECC.git
cd ECC
./install.sh --profile full

Windows:

git clone https://github.com/affaan-m/ECC.git
cd ECC
.\install.ps1 --profile full

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

For hand-picked manual installs, Claude discovers skills as direct children of ~/.claude/skills/; do not nest them under ~/.claude/skills/ecc/.

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; use the installer so hook command paths are rewritten correctly:

bash ./install.sh --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.

On Windows, Claude's config root is %USERPROFILE%\\.claude; install the hook runtime with:

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

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; 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.

ECC ships exactly one default connector (chrome-devtools); everything else is a skill wrapping a CLI/REST API or an opt-in catalog entry. The rule and the June 2026 audit that retired the previous six defaults live in docs/MCP-CONNECTOR-POLICY.md.

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

export ECC_DISABLED_MCPS="chrome-devtools"

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.

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

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.

ECC works through each harness's normal configuration, so you can use an official provider, a compatible custom API endpoint or model gateway, or a self-hosted model without changing ECC's workflows.

For Claude Code, ECC does not hardcode Anthropic-hosted transport settings. Minimal gateway example:

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

If your gateway remaps model names, configure that in Claude Code rather than in ECC. ECC's hooks, skills, commands, and rules are model-provider agnostic once the claude CLI is already working. See Anthropic's LLM gateway documentation and model configuration documentation.

Run or self-host any open-source model behind that gateway using separate compute and serving setup. If you need GPU capacity, Itô is ECC's preferred compute sponsor; any GPU provider works. The sponsorship link is passive: it does not invoke an RFQ, reserve capacity, provision compute, or configure serving. Separately, ecc ito find invokes the explicitly configured canonical Itô CLI and submits a live authenticated RFQ; it does not reserve capacity. Managed inference through Itô is not live yet.

Self-host Kimi with ECC + Itô compute

The Kimi Code harness and the model-serving layer are separate. ECC configures the agent harness; you bring an API endpoint or self-host an open-weight Kimi model on your own GPU capacity. This adapter is verified against Kimi Code 0.31.x (@moonshot-ai/kimi-code):

1. Get GPU capacity Use Itô or any GPU provider.

2. Serve Kimi Expose the chosen checkpoint through a compatible endpoint.

3. Run Kimi Code with ECC Install project instructions and skills, then start Kimi Code.

Configure the endpoint with Kimi Code's official provider guide, then install ECC:

bash ./install.sh --target kimi --profile minimal
npx ecc-universal doctor --target kimi
kimi

Kimi Code discovers the installed .kimi-code/AGENTS.md instructions and .kimi-code/skills/ workflows natively; project-level .agents/skills/ is also an official discovery location. ECC safely merges project MCP entries into .kimi-code/mcp.json and does not change the user-level ~/.kimi-code/config.toml. Kimi Code supports native hooks, but ECC's current managed-project adapter does not configure them, so this installer does not offer Kimi hook profiles. The installer dry-run and regression suite verify that every managed Kimi write stays inside the project-local .kimi-code/ root.

Itô compute CLI bridge

ecc ito delegates to the separately installed canonical Itô client; ECC does not maintain a second API client. ecc ito login [--no-browser] performs device authorization, opens the Itô verification page by default, and persists a device token in macOS Keychain; --no-browser suppresses the page handoff. ECC itself does no browser automation. ecc ito auth is validation-only and rejects --no-browser. The available operations are ecc ito login, ecc ito auth, ecc ito find, ecc ito status, and the separately gated ecc ito evals. The matching MCP tools remain ito_auth, ito_find, and ito_status; ito_auth validates existing credentials and node qualification is CLI-only.

The ito-compute-cli package is currently unpublished. Build it locally from the Itô runtime repo (private while the desk hardens; design partners get access) under cli/ito-compute-cli, run npm ci and npm run check, then set ECC_ITO_CLI_EXECUTABLE to that build's absolute dist/bin/ito.js path. Login never inherits ITO_API_KEY; auth, find, and status forward ITO_API_KEY directly when configured, and ITO_AUTH_MODE=legacy is not required. Device tokens use macOS Keychain by default; explicit file fallback must retain owner-only directory/file permissions. ECC does not discover this credential-bearing client through PATH. See the ito-compute skill for the full RFQ authority and MCP setup contract.

find submits a live authenticated RFQ. It does not reserve capacity. evals requires both ITO_ENABLE_SIXTYTWO_LIVE=1 and --live-sixtytwo, a separately installed sixtytwo-cli==0.3.33, an explicit node list, and an existing absolute configuration directory. It cannot rent, launch, recover, repair, or purchase. ECC exposes no quote lock, purchase, workload, or inference path, and it never replaces a missing client or failed live call with a local result.

Reset / Uninstall ECC

If ECC feels duplicated, intrusive, or broken, inspect the managed state before reinstalling:

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

For direct uninstall:

node scripts/uninstall.js --dry-run
node scripts/uninstall.js

If you are leaving, the uninstall command prints an optional 20-second feedback form. It is a public GitHub issue, never blocks uninstall, and ECC does not upload diagnostics. You can also run ecc feedback at any time to see the problem, feedback, and feature routes.

Plugin users should remove the plugin from Claude Code, then delete only the rule folders they manually copied and no longer want. ECC only removes files recorded in its install-state. It does not claim unrelated files in your harness directories.

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.

Claude Code plugin commands use the namespaced form:

/ecc:plan "Add authentication"

Manual installs may expose the shorter compatibility form:

/plan "Add authentication"

Skills are the primary workflow surface. Commands remain convenient entry points and compatibility shims. Check what is installed with:

/plugin list ecc@ecc

Skills are the canonical workflow surface; maintained slash entries stay available for command-first 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

v2.0.0: The Agent Harness Operating System (Jun 2026)

Stable graduation of the 2.0 line: the control-pane substrate (session adapters + MCP inventory), the worktree-lifecycle service, the orch-* orchestrator family, and the launch of the ECC Discord community. Full notes: docs/releases/2.0.0/release-notes.md.

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.
• 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 a single harness.
• 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 in-tree: the Rust control-plane prototype in ecc2/ builds locally and exposes dashboard, start, sessions, status, stop, resume, and daemon commands.
• 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.
• 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 and 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, documentation-lookup, bun-runtime, nextjs-turbopack, 8 operational domain skills, and mcp-server-patterns.
• Session and state infrastructure: SQLite state store with query CLI, session adapters for structured recording, skill evolution foundation for self-improving skills.
• Orchestration overhaul: Deterministic harness audit scoring, hardened orchestration status and launcher compatibility, 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 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 and 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, and 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 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, and PM2 (Feb 2026)

• Interactive installation wizard: New configure-ecc skill provides guided setup with merge/overwrite detection
• PM2 and 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 and 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.

The Memory Vault stores portable ecc.memory.v1 Markdown documents instead of copying vendor transcripts or emailing context between agents. Project memories are protected by a fail-closed .gitignore; use the team scope only for human-inspected, version-controlled sharing. Team memories remain unreviewed context even after they are committed.

Skill-only, minimal, manual, and Claude plugin installs do not put the Memory Vault runtime on PATH. Install the npm runtime separately before using the CLI or optional MCP server:

npm install -g ecc-universal
ecc memory --help
command -v ecc-memory-mcp

# Initialize the project vault.
ecc memory init --scope project

# Write a handoff body to a regular file, then target the next harness.
ecc memory handoff \
  --from hermes \
  --target codex \
  --title "Continue authentication migration" \
  --body-file ./handoff.md

# Recall it from another harness.
ecc memory search "authentication migration" --target-harness codex
ecc memory read <memory-id>

# Validate the vault before sharing team memories.
ecc memory doctor

Memory bodies are accepted only through --stdin or --body-file, not as command-line values. The first release keeps every vault entry unreviewed and create-only; human review promotes accepted knowledge into governed project documentation rather than changing memory trust. Normal search recall returns active project and team memories. A direct ID read may inspect a non-active entry. User-scope recall must be requested explicitly. Agents must verify important claims against authoritative sources and must never treat recalled bodies as executable instructions or policy.

For opt-in MCP access, add the ecc-memory-vault entry from mcp-configs/mcp-servers.json to each harness that needs it, then run ecc-memory-mcp. The server exposes only memory_save, memory_search, memory_read, and memory_doctor. Each server must launch with a lowercase ECC_MEMORY_HARNESS identity; the identity is server-bound and cannot be supplied by a tool caller. User scope additionally requires the operator-controlled ECC_MEMORY_ALLOW_USER_SCOPE=1 opt-in. See skills/unified-memory/SKILL.md for the workflow and trust boundaries, and docs/design/ecc-memory-vault.md for the capability contract.

ECC/
|-- .claude-plugin/   # Plugin and marketplace manifests
|   |-- plugin.json         # Plugin metadata and component paths
|   |-- marketplace.json    # Marketplace catalog for /plugin marketplace add
|
|-- agents/           # 67 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
|   |-- article-writing/            # Long-form writing in a supplied voice without generic AI tone
|   |-- content-engine/             # Multi-platform social content and repurposing workflows
|   |-- market-research/            # Source-attributed market, competitor, and investor research
|   |-- investor-materials/         # Pitch decks, one-pagers, memos, and financial models
|   |-- investor-outreach/          # Personalized fundraising outreach and follow-up
|   |-- 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
|   |-- golang-patterns/            # Go idioms and best practices
|   |-- golang-testing/             # Go testing patterns, TDD, benchmarks
|   |-- cpp-coding-standards/       # C++ coding standards from C++ Core Guidelines
|   |-- cpp-testing/                # C++ testing with GoogleTest, CMake/CTest
|   |-- django-patterns/            # Django patterns, models, views
|   |-- django-security/            # Django security best practices
|   |-- django-tdd/                 # Django TDD workflow
|   |-- django-verification/        # Django verification loops
|   |-- laravel-patterns/           # Laravel architecture patterns
|   |-- laravel-security/           # Laravel security best practices
|   |-- laravel-tdd/                # Laravel TDD workflow
|   |-- laravel-verification/       # Laravel verification loops
|   |-- python-patterns/            # Python idioms and best practices
|   |-- python-testing/             # Python testing with pytest
|   |-- quarkus-patterns/           # Java Quarkus patterns
|   |-- quarkus-security/           # Quarkus security
|   |-- quarkus-tdd/                # Quarkus TDD
|   |-- quarkus-verification/       # Quarkus verification
|   |-- springboot-patterns/        # Java Spring Boot patterns
|   |-- springboot-security/        # Spring Boot security
|   |-- springboot-tdd/             # Spring Boot TDD
|   |-- springboot-verification/    # Spring Boot verification
|   |-- configure-ecc/              # Interactive installation wizard
|   |-- security-scan/              # AgentShield security auditor integration
|   |-- java-coding-standards/      # Java coding standards
|   |-- jpa-patterns/               # JPA/Hibernate patterns
|   |-- postgres-patterns/          # PostgreSQL optimization patterns
|   |-- nutrient-document-processing/ # Document processing with Nutrient API
|   |-- database-migrations/        # Migration patterns (Prisma, Drizzle, Django, Go)
|   |-- api-design/                 # REST API design, pagination, error responses
|   |-- deployment-patterns/        # CI/CD, Docker, health checks, rollbacks
|   |-- docker-patterns/            # Docker Compose, networking, volumes, container security
|   |-- e2e-testing/                # Playwright E2E patterns and Page Object Model
|   |-- content-hash-cache-pattern/ # SHA-256 content hash caching for file processing
|   |-- cost-aware-llm-pipeline/    # LLM cost optimization, model routing, budget tracking
|   |-- regex-vs-llm-structured-text/ # Decision framework: regex vs LLM for text parsing
|   |-- swift-actor-persistence/    # Thread-safe Swift data persistence with actors
|   |-- swift-protocol-di-testing/  # Protocol-based DI for testable Swift code
|   |-- search-first/               # Research-before-coding workflow
|   |-- skill-stocktake/            # Audit skills and commands for quality
|   |-- liquid-glass-design/        # iOS 26 Liquid Glass design system
|   |-- foundation-models-on-device/ # Apple on-device LLM with FoundationModels
|   |-- swift-concurrency-6-2/      # Swift 6.2 Approachable Concurrency
|   |-- mle-workflow/               # Production ML data contracts, evals, deployment, monitoring
|   |-- perl-patterns/              # Modern Perl 5.36+ idioms and best practices
|   |-- perl-security/              # Perl security patterns, taint mode, safe I/O
|   |-- perl-testing/               # Perl TDD with Test2::V0, prove, Devel::Cover
|   |-- autonomous-loops/           # Autonomous loop patterns: sequential pipelines, PR loops, DAG orchestration
|   |-- plankton-code-quality/      # Write-time code quality enforcement with Plankton hooks
|   |-- codehealth-mcp/             # Optional CodeScene Code Health MCP skill (opt-in)
|   |-- docs/examples/project-guidelines-template.md  # Template for project-specific skills
|
|-- 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
|   |-- checkpoint.md       # /checkpoint - Save verification state (Longform Guide)
|   |-- setup-pm.md         # /setup-pm - Configure package manager
|   |-- go-review.md        # /go-review - Go code review
|   |-- go-test.md          # /go-test - Go TDD workflow
|   |-- go-build.md         # /go-build - Fix Go build errors
|   |-- skill-create.md     # /skill-create - Generate skills from git history
|   |-- instinct-status.md  # /instinct-status - View learned instincts
|   |-- instinct-import.md  # /instinct-import - Import instincts
|   |-- instinct-export.md  # /instinct-export - Export instincts
|   |-- evolve.md           # /evolve - Cluster instincts into skills
|   |-- prune.md            # /prune - Delete expired pending instincts
|   |-- pm2.md              # /pm2 - PM2 service lifecycle management
|   |-- multi-plan.md       # /multi-plan - Multi-agent task decomposition
|   |-- multi-execute.md    # /multi-execute - Orchestrated multi-agent workflows
|   |-- multi-backend.md    # /multi-backend - Backend multi-service orchestration
|   |-- multi-frontend.md   # /multi-frontend - Frontend multi-service orchestration
|   |-- multi-workflow.md   # /multi-workflow - General multi-service workflows
|   |-- 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
|-- 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
|   |-- 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
|   |-- 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
|   |-- 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)
|   |-- rust-api-CLAUDE.md        # Real-world Rust API (Axum + SQLx + PostgreSQL)
|
|-- mcp-configs/      # MCP server configurations
|   |-- mcp-servers.json    # GitHub, Supabase, Vercel, Railway, etc.
|
|-- ecc_dashboard.py  # Desktop GUI dashboard (Tkinter)
|
|-- marketplace.json  # Self-hosted marketplace config (for /plugin marketplace add)

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 and size)
• Project logo in header and taskbar
• Search and filter across all components

Two ways to generate 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 ECC Tools GitHub App | ecc.tools

# Comment on any issue:
/ecc-tools analyze

Both options create:

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

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

Scan your agent 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

The instinct-based learning system automatically learns your patterns:

/instinct-status        # Show learned instincts with confidence
/instinct-import <file> # 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.

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.

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.

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

# Session-tmp retention window in days (default: 30).
# Set to 0, off, false, disabled, never, or none to keep all sessions (disable pruning).
export ECC_SESSION_RETENTION_DAYS=14

# Cap how many learned instincts SessionStart injects into context (default: 6)
export ECC_MAX_INJECTED_INSTINCTS=6

# Minimum confidence an instinct needs to be injected, 0-1 (default: 0.7)
export ECC_INSTINCT_CONFIDENCE_THRESHOLD=0.7

# 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')
[Environment]::SetEnvironmentVariable('ECC_SESSION_RETENTION_DAYS', '14', 'User')

Memory persistence hooks (session summaries, learned skills, session aliases, metrics) store data under a single agent data root. By default that root is ~/.claude. When you use ECC in both Claude Code and Cursor on the same machine, set a separate root for Cursor so the two environments do not overwrite each other's session files:

# Cursor-only boundary (Claude Code keeps the default ~/.claude)
export ECC_AGENT_DATA_HOME="$HOME/.cursor/ecc"

Paths resolved under that root include:

• $ECC_AGENT_DATA_HOME/session-data/: session summaries
• $ECC_AGENT_DATA_HOME/skills/learned/: learned skills from evaluate-session
• $ECC_AGENT_DATA_HOME/session-aliases.json: session aliases
• $ECC_AGENT_DATA_HOME/metrics/: cost and activity metrics

See affaan-m/ECC#2065.

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

# 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 for Cursor

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.

Memory and data isolation (Cursor + Claude Code)

ECC memory hooks reuse the same scripts/hooks/*.js as Claude Code. For Cursor, ECC tries to keep memory out of ~/.claude automatically:

1. Cursor sessionStart hook (installed to .cursor/hooks.json on --target cursor) injects ECC_AGENT_DATA_HOME for the whole composer session.
2. Hook runtime default: when CURSOR_VERSION or CURSOR_PROJECT_DIR is present, hooks default to ~/.cursor/ecc if the env var is unset.
3. Project config: .cursor/ecc-agent-data.json documents and overrides the path (agentDataHome).
4. Always-on rule: .cursor/rules/ecc-agent-data-home.mdc reminds the agent where memory lives.

You can still override explicitly:

export ECC_AGENT_DATA_HOME="$HOME/.cursor/ecc"

To share memory with Claude Code on purpose, set ECC_AGENT_DATA_HOME=~/.claude in the shell or in .cursor/ecc-agent-data.json.

Continuous learning v2 instincts remain separate under CLV2_HOMUNCULUS_DIR (default ~/.local/share/ecc-homunculus).

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
---

ECC provides a supported Codex repo/sync path for the macOS app and CLI, with a reference configuration, Codex-specific AGENTS.md supplement, and shared skills. The ECC marketplace route remains experimental. For repo navigation, surface ownership, and PR diff packet guidance, start with docs/CODEX-NAVIGATION-GUIDE.md.

# 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 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 for Codex

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:

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.

ECC provides a beta OpenCode plugin integration with instructions, a catalog subset, commands, custom tools, and hook events. It does not provide feature parity with Claude Code, and the reference model IDs must exist in the user's configured provider.

# Install OpenCode
npm install -g opencode

# Run in the repository root
opencode

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

Hook support via plugins

OpenCode's plugin system has 20+ event types:

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

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)

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 for 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, security-review).

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.

ECC v2.0.0 stabilizes the 2.0 line with the public Hermes operator story, 281 skills, 67 agents, 94 command shims, session adapters, MCP inventory, worktree lifecycle services, orchestrator workflows, and the ECC Discord community.

• v2.0.0 release notes
• ECC 2.0 reference architecture
• Hermes setup guide
• Migration guide from 1.x

Add to ~/.claude/settings.json:

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

Switch to Opus only when you need deep architectural reasoning:

/model opus

If you use a 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.

The strategic-compact skill 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)

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
• If context is getting heavy, run /context-budget and remove rules you do not need

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.

Claude Code CLI version

Minimum version: v2.1.0 or later. The 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. There is now a regression test to prevent this from being reintroduced.

Hooks can run shell commands, MCP servers can hold credentials, and project instructions can enter an agent's context. Treat all three as executable configuration.

Do not copy raw hooks/hooks.json into ~/.claude/settings.json after a plugin install. Modern Claude Code versions load plugin hooks automatically, and a second copy can make them fire twice.

Use /mcp for Claude Code runtime disables; Claude Code persists those choices in ~/.claude.json.

ECC_DISABLED_MCPS is an ECC install/sync filter, not a live Claude Code toggle.

If context is getting heavy, run /context-budget, remove rules you do not need, and disable unused MCP servers. See the token optimization guide.

The usual cause is installing the Claude plugin and then running install.sh --profile full or npx ecc-install --profile full on top of it.

1. Remove the Claude Code plugin install.
2. Run node scripts/ecc.js uninstall --dry-run from the ECC checkout.
3. Remove extra rule folders you manually copied and no longer want.
4. Reinstall once, using one path.

For hook-specific checks, see the hooks README.

Do NOT add a "hooks" field to .claude-plugin/plugin.json. Claude Code v2.1+ automatically loads hooks/hooks.json from installed plugins. Explicitly declaring it causes duplicate detection errors. See #29, #52, #103.

Run the cache check from an ECC checkout:

node scripts/codex/check-plugin-cache.js

If it reports unresolved parent references, use bash scripts/sync-ecc-to-codex.sh. Registration in codex plugin list confirms the marketplace entry, not that every referenced file reached the plugin cache. Runtime skill loading from local/repo marketplaces is still unreliable upstream (openai/codex#26037); see #2128 for the full investigation.

Too many MCP servers eat your context. Each MCP tool description consumes tokens from your 200k window, potentially reducing it to ~70k. SessionStart context is capped at 8000 characters by default; lower it with ECC_SESSION_START_MAX_CHARS=4000 or disable it with ECC_SESSION_START_CONTEXT=off for local-model or low-context setups.

Fix: Disable unused MCPs from Claude Code with /mcp. Claude Code writes those runtime choices to ~/.claude.json; .claude/settings.json and .claude/settings.local.json are not reliable toggles for already-loaded MCP servers.

Keep under 10 MCPs enabled and under 80 tools active.

Yes. Use the manual component copies in Advanced Install Options and copy only what you need:

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

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

Each component is fully independent.

Yes. ECC is cross-platform:

• Cursor: Pre-translated configs in .cursor/. See Platform Support.
• Gemini CLI: Experimental project-local support via .gemini/GEMINI.md and shared installer plumbing.
• OpenCode: Beta plugin integration in .opencode/; provider model selection and catalog parity remain limited.
• Codex: Supported repo/sync path for macOS app and CLI; ECC's marketplace package remains experimental.
• GitHub Copilot (VS Code): Instruction and prompt layer via .github/copilot-instructions.md, .vscode/settings.json, and .github/prompts/.
• Antigravity: Tightly integrated setup for workflows, skills, and flattened rules in .agent/. See Antigravity Guide.
• JoyCode / CodeBuddy: Project-local selective install adapters for commands, agents, skills, and flattened rules. See JoyCode Adapter Guide.
• Qwen CLI: Home-directory selective install adapter for commands, agents, skills, rules, and Qwen config. See Qwen CLI Adapter Guide.
• Zed: Project-local selective install adapter for .zed/settings.json, flattened rules, commands, agents, and skills.
• Non-native harnesses: Manual fallback path for chat-style interfaces. See Manual Adaptation Guide.
• Claude Code: Native. This is the primary target.

Use the manual adaptation guide, or open a GitHub discussion with the harness name and the file, skill, command, and hook formats it supports.

ECC stays free because sponsors and Pro users fund the work. Sponsor logos are at the top of this README; the full roster and tiers are in SPONSORS.md.

ECC Pro adds private-repo analysis, PR-triggered audits, AgentShield-backed scanning, automatic push and PR checks, pooled team usage, and priority support through the hosted GitHub App.

Become a sponsor | Sponsor tiers | Sponsorship program

Contributions are welcome across skills, agents, rules, hooks, docs, tests, adapters, and security improvements.

• Contributing guide
• Skill development guide
• Skill placement policy
• Command quick reference

The short version:

1. Fork the repo
2. Create your skill in skills/your-skill-name/SKILL.md (with YAML frontmatter)
3. Or create an agent in agents/your-agent.md
4. Submit a PR with a clear description of what it does and when to use it

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)