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feature-spec-author

Convert approved PRDs into implementation-ready engineering specs with data models and APIs.

Updated Aug 23, 2026
Search Tags:#automation#software design#product development#spec generation#requirements analysis#architecture design#technical documentation
One-click install
npx skills add https://github.com/pcortes/swarm-attack --skill feature-spec-author
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: feature-spec-author
Source: https://github.com/pcortes/swarm-attack/tree/main/default-skills/feature-spec-author
Command: npx skills add https://github.com/pcortes/swarm-attack --skill feature-spec-author

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill automates the complex and time-intensive process of transforming a Product Requirements Document (PRD) into a detailed engineering specification. It saves architects and developers significant time, ensures all product requirements are accurately translated into actionable technical plans, and reduces ambiguity before implementation begins.

Core Features & Use Cases

  • Automated Spec Generation: Creates comprehensive engineering specifications from high-level PRDs, covering all necessary technical details.
  • Structured Documentation: Generates specs with predefined sections for architecture, data models, API design, implementation plans, and testing strategies.
  • Proactive Risk Identification: Analyzes requirements to surface potential risks, dependencies, and open questions early in the design phase.
  • Use Case: A product manager provides a PRD for a new user authentication system. This Skill automatically drafts a full engineering specification, including data models, API endpoints, and a testing strategy, ready for review and refinement.

Quick Start

Draft a detailed engineering specification for the feature described in the PRD at '.claude/prds/user-auth.md', following the standard spec format.

Frequently Asked Questions about feature-spec-author

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

FAQPage Schema
How do I convert a PRD into a detailed engineering specification?▼

Converting a PRD into an engineering spec involves extracting product requirements and translating them into technical architecture, data models, API design, and implementation plans. This Skill automates that translation by analyzing the PRD, exploring your codebase and existing infrastructure, then drafting a complete spec ready for team review.

What should a technical specification include for early-stage startup features?▼

A complete engineering spec covers architecture decisions, data models, API endpoints, error handling at boundaries, type hints, input validation, logging strategy, and testing scope. This Skill generates specs that enforce Lean Engineering requirements while defining minimal viable changes aligned to your project conventions.

Can I use this to identify risks and dependencies before implementation?▼

Yes. This Skill proactively surfaces potential risks, dependencies, and open questions during the specification phase. Analyzing requirements early helps teams spot integration challenges, infrastructure gaps, and design conflicts before coding begins.

How does this work with my existing codebase and infrastructure?▼

The Skill explores your codebase, data models, and API patterns to ensure generated specs align with project conventions and existing infrastructure. This grounding produces specs that are implementation-ready rather than generic.

What's the difference between a PRD and an engineering specification?▼

A PRD describes what to build and why from a product perspective; an engineering spec details how to build it technically. Specs include architecture, data models, APIs, validation rules, logging, error handling, and testing strategies that developers need before implementation.

Do I need architectural knowledge to use this Skill effectively?▼

No. Provide an approved PRD and describe your tech stack; this Skill handles spec generation. However, architectural review of the output ensures the spec fits your system design.

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