Create Feature Specification

Generate a structured Spec.md defining feature purpose, user stories, and testable assertions.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/rghsoftware/context-engine --skill create-feature-specification
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Create Feature Specification
Source: https://github.com/rghsoftware/context-engine/tree/main/context-engine/skills/plan-spec
Command: npx skills add https://github.com/rghsoftware/context-engine --skill create-feature-specification

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill helps users clearly define the "what" and "why" of a new feature, ensuring alignment before any technical implementation begins.

Core Features & Use Cases

  • Generates a structured feature specification document (Spec.md).
  • Guides users through defining feature overview, problem statements, user stories, requirements, and testable assertions.
  • Prevents scope creep by explicitly defining what is out of scope for the current iteration.
  • Use Case: A product manager needs to kick off development for a new user authentication flow. They use this Skill to generate a Spec.md that outlines the user experience, security requirements, and acceptance criteria.

Quick Start

Use the plan-spec skill to create a feature specification for a new user profile editing feature.

Frequently Asked Questions about Create Feature Specification

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I write a feature specification document for new software features?

To write a feature specification, define the feature overview, problem statements, user stories, requirements, and testable assertions. This structured template clarifies the what and why before technical implementation begins.

What should be included in a feature spec to prevent scope creep?

A feature spec must include user stories, requirements, and testable assertions, while explicitly defining what is out of scope. Setting these boundaries prevents scope creep during the current development iteration.

How do I define testable assertions for product management requirements?

Defining testable assertions for product management requires outlining specific acceptance criteria within your specification. This ensures the feature's purpose and user stories are verifiable before coding starts.

Does a feature specification document need technical implementation details?

A feature specification document does not need technical implementation details. It adheres to a phased planning workflow that focuses solely on defining the what and why of the feature.

What is the best way to gather requirements for a user authentication flow?

The best way to gather requirements for a user authentication flow is generating a structured specification. This aligns teams on the user experience, security requirements, and acceptance criteria before development.