Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Test-Driven Development Workflow
This skill ensures all code development follows TDD principles with comprehensive test coverage.
## When to Activate
- Writing new features or functionality
- Fixing bugs or issues
- Refactoring existing code
- Adding API endpoints
- Creating new components
## Core Principles
### 1. Tests BEFORE Code
ALWAYS write tests first, then implement code to make tests pass.
### 2. Coverage Requirements
- Minimum 80% coverage (unit + integration + E2E)
- All edge cases covered
- Error scenarios tested
- Boundary conditions verified
### 3. Test Types
#### Unit Tests
- Individual functions and utilities
- Component logic
- Pure functions
- Helpers and utilities
#### Integration Tests
- API endpoints
- Database operations
- Service interactions
- External API calls
#### E2E Tests (Playwright)
- Critical user flows
- Complete workflows
- Browser automation
- UI interactions
## TDD Workflow Steps
### Step 1: Write User Journeys
```
As a [role], I want to [action], so that [benefit]
Example:
As a user, I want to search for markets semantically,
so that I can find relevant markets even without exact keywords.
```
### Step 2: Generate Test Cases
…
The line at the top of this page pins the label v1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (9822 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag
Source
GitHub
affaan-m/ecc · 299,696 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_z6qiiubp2qczvlvh
GET https://markdownregistry.com/api/v1/resolve?ref=affaan-m/ecc/tdd-workflow
GET https://markdownregistry.com/api/v1/blob/25ba83a8042f33aecc109de94628e52b44f9cffe3e876f836f780f5913bb3c73
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
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affaan-m/ecc · .agents/skills/tdd-workflow/SKILL.md · Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+…
affaan-m/ecc · docs/es/skills/tdd-workflow/SKILL.md · Usar este skill al escribir nuevas funcionalidades, corregir bugs o refactorizar código. Aplica el desarrollo guiado…
travisjneuman/.claude · skills/tdd-workflow/SKILL.md · Test-Driven Development workflow enforcement with RED-GREEN-REFACTOR cycle. Use only when the user explicitly asks for…
naimkatiman/continuous-improvement · plugins/continuous-improvement/skills/tdd-workflow/SKILL.md · Enforces Law 3 (One Thing at a Time) and Law 4 (Verify Before Reporting) of the 7 Laws of AI Agent Discipline. Use this…
harshadmadaye/opm · skills/tdd-workflow/SKILL.md · Drives test-driven development through a strict RED-GREEN-REFACTOR cycle with test-runner detection, a "fails for the…
