ECC is a toolkit that organizes and improves how coding agents work through skills, memory, security checks, research practices, and related extensions. It is for developers using agents such as Claude Code, Codex, OpenCode, and Cursor.
Borrowing it
Nothing to install: this file belongs to affaan-m/ECC. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/affaan-m/ECC/main/AGENTS.mdgit clone --depth 1 https://github.com/affaan-m/ECCWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/affaan-m/ecc/agents-md)<a href="https://agentmods.dev/instructions/affaan-m/ecc/agents-md"><img src="https://agentmods.dev/badge/instructions/affaan-m/ecc/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/affaan-m/ecc/agents-md"><img src="https://agentmods.dev/badge/instructions/affaan-m/ecc/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.02792 | $0.02792 |
| Opus 5.5 | $0.01117 | $0.01117 |
| Sonnet 5.5 | $0.00558 | $0.00558 |
| Haiku 4.5 | $0.00279 | $0.00279 |
Grade A, and why
ECC AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
3 near-identical copies found in the catalogue:
- awesome-claude-notes AGENTS.md — 89% identical, 104 lines differ
- everything-claude-code AGENTS.md — 83% identical, 109 lines differ
- everythingclaudecode AGENTS.md — 83% identical, 109 lines differ
How it starts
The opening of the file, as written. The whole thing — 223 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ECC — Agent Instructions
This is a production-ready AI coding plugin providing 71 specialized agents, 311 skills, 97 commands, and automated hook workflows for software development.
Version: 2.2.3
Core Principles
- Agent-First — Delegate to specialized agents for domain tasks
- Test-Driven — Write tests before implementation, 80%+ coverage required
- Security-First — Never compromise on security; validate all inputs
- Immutability — Always create new objects, never mutate existing ones
- Plan Before Execute — Plan complex features before writing code
Available Agents
| Agent | Purpose | When to Use |
|---|---|---|
| planner | Implementation planning | Complex features, refactoring |
| architect | System design and scalability | Architectural decisions |
| tdd-guide | Test-driven development | New features, bug fixes |
| code-reviewer | Code quality and maintainability | After writing/modifying code |
| bengali-reviewer | Bengali text review | Unicode, normalization, grapheme, search, and locale correctness |
| security-reviewer | Vulnerability detection | Before commits, sensitive code |
| spec-miner | Brownfield spec extraction | Onboarding brownfield projects to spec-driven development |
| build-error-resolver | Fix build/type errors | When build fails |
| e2e-runner | End-to-end Playwright testing | Critical user flows |
| refactor-cleaner | Dead code cleanup | Code maintenance |
| doc-updater | Documentation and codemaps | Updating docs |
| cpp-reviewer | C/C++ code review | C and C++ projects |
| cpp-build-resolver | C/C++ build errors | C and C++ build failures |
| fsharp-reviewer | F# functional code review | F# projects |
| docs-lookup | Documentation lookup via Context7 | API/docs questions |
| go-reviewer | Go code review | Go projects |
| go-build-resolver | Go build errors | Go build failures |
| kotlin-reviewer | Kotlin code review | Kotlin/Android/KMP projects |
| kotlin-build-resolver | Kotlin/Gradle build errors | Kotlin build failures |
| database-reviewer | PostgreSQL/Supabase specialist | Schema design, query optimization |
| python-reviewer | Python code review | Python projects |
| django-reviewer | Django code review | Django apps, DRF APIs, ORM, migrations |
| django-build-resolver | Django build, migration, and setup errors | Django startup, dependency, migration, collectstatic failures |
| java-reviewer | Java and Spring Boot code review | Java/Spring Boot projects |
| java-build-resolver | Java/Maven/Gradle build errors | Java build failures |
| loop-operator | Autonomous loop execution | Run loops safely, monitor stalls, intervene |
| harness-optimizer | Harness config tuning | Reliability, cost, throughput |
| rust-reviewer | Rust code review | Rust projects |
| rust-build-resolver | Rust build errors | Rust build failures |
| pytorch-build-resolver | PyTorch runtime/CUDA/training errors | PyTorch build/training failures |
| mle-reviewer | Production ML pipeline review | ML pipelines, evals, serving, monitoring, rollback |
| rag-pipeline-reviewer | RAG pipeline review | Retrieval quality, chunking, reranking, RAGAS evaluation coverage |
| typescript-reviewer | TypeScript/JavaScript code review | TypeScript/JavaScript projects |
| react-reviewer | React/JSX code review | React component and hook changes |
| react-build-resolver | React/Vite/Next.js/webpack build errors | React build failures |
| vue-reviewer | Vue.js Composition API and reactivity review | Vue component, Pinia, and Nuxt changes |
| swift-reviewer | Swift/iOS code review | Swift code changes |
| swift-build-resolver | Swift/Xcode/SPM build errors | Swift build failures |
| flutter-reviewer | Flutter/Dart widget and state review | Flutter app changes |
| dart-build-resolver | Dart/Flutter build and pub dependency errors | Flutter compilation failures |
| csharp-reviewer | C#/.NET async patterns, nullability, security | All C# code changes |
| fastapi-reviewer | FastAPI async correctness, Pydantic, OpenAPI | FastAPI endpoint and schema changes |
| php-reviewer | PHP/PSR-12, Eloquent, security review | PHP code changes |
| harmonyos-app-resolver | HarmonyOS ArkTS/ArkUI code and API review | HarmonyOS/OpenHarmony application changes |
| healthcare-reviewer | Clinical safety, PHI compliance, CDSS accuracy | Healthcare, EMR/EHR application code |
| a11y-architect | WCAG 2.2 accessibility architecture | Designing UI components, accessibility audits |
| code-architect | Feature architecture blueprints from codebase patterns | New features needing implementation design |
| network-architect | Enterprise multi-site network architecture | Complex network design decisions |
| homelab-architect | Home/small-lab network design | Home infrastructure planning |
| network-config-reviewer | Router/switch config security and correctness | Network configuration changes |
| network-troubleshooter | OSI-layer connectivity and routing diagnosis | Network connectivity and routing issues |
| performance-optimizer | Bottleneck detection, bundle size, memory leaks | Slow code or high resource usage |
| silent-failure-hunter | Swallowed errors and missing propagation | Code reliability audits |
| type-design-analyzer | Type encapsulation and invariant design | Type design and invariant reviews |
| pr-test-analyzer | PR test coverage quality and completeness | Before merging pull requests |
| code-explorer | Execution path tracing and architecture mapping | Understanding unfamiliar code paths |
| code-simplifier | Clarity-focused code refinement without behavior change | Post-implementation cleanup |
| comment-analyzer | Comment accuracy, freshness, and rot risk | Code comment audits |
| agent-evaluator | 5-axis quality scoring for agent output | Evaluating task completion quality |
| chief-of-staff | Multi-channel communication triage and drafting | Managing email/Slack communication workflows |
| conversation-analyzer | Extract hook behaviors from session transcripts | Creating hooks from observed patterns |
| marketing-agent | Campaign planning, copy creation, content calendars | Product launches, marketing campaigns |
| seo-specialist | Technical SEO audit, structured data, Core Web Vitals | Site audits, meta tag and schema issues |
| opensource-forker | Fork projects and strip secrets for open-sourcing | Starting an open-source release |
| opensource-sanitizer | Verify sanitized fork is release-ready | Before any public release |
| opensource-packager | Generate OSS packaging boilerplate (README, LICENSE, etc.) | Finalizing an open-source release |
| gan-planner | Expand a prompt into a full product specification | Starting a GAN harness session |
| gan-generator | Implement features per spec, iterate on evaluator feedback | GAN harness implementation phase |
| gan-evaluator | Test running application via Playwright and score it | GAN harness evaluation phase |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago Changed 63f61dcfaa2c
- 14d ago Changed · +1 lines · +23 tokens per session c3536bef387a
- 22d ago Changed · -5 tokens per session 6bbda111a95f
- 24d ago Changed · +47 lines · +891 tokens per session 9df528ead9c1
- 1mo ago Changed · +21 tokens per session c82ffad107ae
- 1mo ago Changed 5d77abbadedd
- 1mo ago Changed 70fc243ecd93
- 1mo ago First seen · 175 lines · 1,862 tokens per session scan A 8d39c1fc1468
ECC AGENTS.md is an instructions file published in the GitHub repository affaan-m/ECC (287,323 stars, last pushed 3d ago), licensed MIT. It adds 2,792 tokens to every session, about $0.0112 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).