How to use Feature Forge skill in Claude Code for beginners

Feb 14, 2026

Purpose

This post demonstrates how to use the Feature Forge skill in Claude Code for workflow development and feature implementation.

Environment

Claude Code CLI (latest)
claude-skills plugin
Feature Forge skill
macOS/Linux or Windows with WSL

What is Feature Forge?

Feature Forge is a skill in the claude-skills ecosystem that helps me implement new features in a structured way. When I need to add functionality to my code, Feature Forge guides me through planning, implementation, and testing.

The skill has 2 main goals:

Structure: Break down features into manageable steps
Quality: Ensure proper testing and code review

I should use Feature Forge when:

I’m adding a new feature larger than a simple bug fix
I need help planning the implementation approach
I want to ensure test coverage and quality checks
The feature requires multiple files or complex changes

Installation and Setup

First, I need to install the claude-skills plugin if I haven’t already:

# Install claude-skills
npm install -g claude-skills

# Or using the Claude Code plugin manager
claude plugin install claude-skills

Then I verify the Feature Forge skill is available:

# List available skills
claude skill list

# I should see "feature-forge" in the output

Basic Usage

To activate Feature Forge, I use one of these trigger phrases:

"Use feature-forge to implement user authentication"
"Plan a new feature with feature-forge"
"I want to add a shopping cart using feature-forge"

The skill will then:

Ask me to describe the feature requirements
Create an implementation plan
Guide me through writing tests first
Help implement the code
Run code review checks
Verify test coverage meets 80%

Example 1: Simple Feature

Let me show how I used Feature Forge to add a user profile feature.

I started with:

Use feature-forge to add user profile pages

Feature Forge asked me questions about what I needed:

What data should be displayed?
Who can access profiles?
Should users edit their own profiles?

After I answered, it created this plan:

Feature: User Profile Pages
1. Create UserProfile component
2. Add profile API endpoint
3. Implement profile editing
4. Add access control
5. Write tests for all components

Then it guided me to write tests first:

import { render, screen } from '@testing-library/react'
import UserProfile from './UserProfile'

describe('UserProfile', () => {
  it('displays user name', () => {
    render(<UserProfile user={{ name: 'Alice' }} />)
    expect(screen.getByText('Alice')).toBeInTheDocument()
  })

  it('shows edit button for own profile', () => {
    render(<UserProfile user={{ id: '123', name: 'Alice' }} currentUserId="123" />)
    expect(screen.getByText('Edit')).toBeInTheDocument()
  })
})

I ran the tests and they failed (RED phase):

npm test -- user-profile.test.ts

# FAIL: UserProfile component not found

Then I implemented the component:

interface UserProfileProps {
  user: { id: string; name: string }
  currentUserId: string
}

export function UserProfile({ user, currentUserId }: UserProfileProps) {
  const isOwnProfile = user.id === currentUserId

  return (
    <div>
      <h1>{user.name}</h1>
      {isOwnProfile && <button>Edit</button>}
    </div>
  )
}

Now the tests passed (GREEN phase):

npm test -- user-profile.test.ts

# PASS: UserProfile 2/2 tests passed

Example 2: Complex Feature

For a shopping cart feature, I used Feature Forge to handle multiple files and components.

I triggered it with:

Use feature-forge to implement shopping cart with persistence

Feature Forge broke this into phases:

Phase 1: Planning
- Define cart data structure
- Plan localStorage persistence
- Design cart API endpoints

Phase 2: Testing
- Write tests for cart state management
- Write tests for persistence
- Write tests for API endpoints

Phase 3: Implementation
- Implement cart context
- Add persistence layer
- Create cart API routes

Phase 4: Review
- Run code review checks
- Verify test coverage
- Check for edge cases

The skill reminded me to test edge cases I might forget:

describe('Shopping Cart', () => {
  it('handles empty cart', () => {
    expect(cart.getItems()).toEqual([])
  })

  it('prevents duplicate items', () => {
    cart.addItem({ id: '1', name: 'Widget' })
    cart.addItem({ id: '1', name: 'Widget' })
    expect(cart.getItems()).toHaveLength(1)
  })

  it('persists across page refresh', () => {
    cart.addItem({ id: '1', name: 'Widget' })
    const saved = localStorage.getItem('cart')
    expect(saved).toBeTruthy()
  })
})

Best Practices

DO

Start with clear requirements

Good: "Add user authentication with email/password and session management"
Bad: "Add auth"

Let Feature Forge guide the process

Answer the planning questions
Follow the test-first approach
Trust the review phase feedback

Run the full workflow

Don’t skip testing
Don’t skip code review
Don’t skip coverage checks

Use for appropriate features

New features requiring multiple files
Features with complex logic
Features needing API changes
Features with security implications

DON’T

Don’t use for simple changes

One-line bug fixes
Variable renames
Simple CSS tweaks
Typo corrections

Don’t skip the planning phase

The questions help clarify requirements
The plan prevents missing pieces
Rushing leads to rework

Don’t ignore test failures

Feature Forge won’t let you proceed
Failing tests indicate problems
Fix tests before moving on

Don’t skip code review

The skill catches common issues
Security checks are important
Quality standards matter

Common Patterns

Pattern 1: Database Schema Changes

When I need to modify the database:

Use feature-forge to add user preferences table

Feature Forge helps me:

Design the schema
Write migration tests
Create migration files
Update model definitions
Test the migration

Pattern 2: API Endpoints

For new API routes:

Use feature-forge to create order management API

The skill guides:

Define endpoint contracts
Write integration tests
Implement request validation
Add error handling
Document endpoints

Pattern 3: UI Components

For new React components:

Use feature-forge to build dashboard widgets

Feature Forge ensures:

Component design
Storybook stories
Unit tests
Accessibility checks
Responsive design

Tips for Maximum Effectiveness

Be specific in initial request

More detail = better plan
Include constraints
Mention dependencies

Answer planning questions honestly

If I’m unsure, say so
Feature Forge adapts to uncertainty
Partial answers still help

Trust the TDD process

Tests first feels slow at first
Prevents bugs from appearing
Makes refactoring safer

Use code review feedback

The skill catches security issues
It finds performance problems
It enforces code style

Run coverage checks

80% minimum is real
Missing coverage = missing tests
Edge cases need coverage too

Feature Forge works well with other claude-skills:

code-reviewer: Use after Feature Forge completes
security-reviewer: For features with authentication/authorization
tdd-workflow: For strict TDD enforcement
planner: For complex multi-feature projects

Summary

In this post, I showed how to use the Feature Forge skill in Claude Code for structured feature development. The key point is that Feature Forge guides me through planning, testing, implementation, and review in a systematic way.

When I use Feature Forge, I get:

Better feature planning
Test-first development
Automatic code review
Consistent quality standards

The skill works best for features requiring multiple files or complex logic. For simple changes, I skip Feature Forge and edit directly.

Final Words + More Resources

My intention with this article was to help others share my knowledge and experience. If you want to contact me, you can contact by email: Email me

Here are also the most important links from this article along with some further resources that will help you in this scope:

Oh, and if you found these resources useful, don’t forget to support me by starring the repo on GitHub!