specify

specify is a skill for Claude Code from rikdc/ai-skills. It costs 34 tokens per session (2,028 once invoked), scanned A, original, MPL-2.0.

A software specification guide that turns broad designs or requirements into detailed instructions for implementation. It can describe APIs, data models, system scope, and success criteria.

In plain words
What is it for?
Use it to create general technical specifications, API contracts, data-model descriptions, or implementation plans from design documents.
Why use it?
It fills in missing decisions and makes requirements precise enough for developers to build and test consistently.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the dev-skills plugin — 9 skills shipped together

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/rikdc/ai-skills/specify
Any agent
npx skills add rikdc/ai-skills --skill specify
Clone the repo
git clone --depth 1 https://github.com/rikdc/ai-skills

Made for: Claude Code.

Or install dev-skills, the plugin that ships this one along with the rest of its 9 skills.

Wrote 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.

agentmods badge for specify

README.md
[![agentmods](https://agentmods.dev/badge/skills/rikdc/ai-skills/specify.svg)](https://agentmods.dev/skills/rikdc/ai-skills/specify)
Your own site
<a href="https://agentmods.dev/skills/rikdc/ai-skills/specify"><img src="https://agentmods.dev/badge/skills/rikdc/ai-skills/specify.svg" alt="Measured on agentmods" height="20"></a>
Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,028 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00034 $0.02028
Opus 5 $0.00017 $0.01014
Sonnet 5 $0.00007 $0.00406
Haiku 4.5 $0.00003 $0.00203

Measured 6d ago against content hash 2dd0b43efee7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

specify 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 6d 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.

plugins/dev-skills/skills/specify/SKILL.md · 320 lines

How it starts

The opening of the file, as written. The whole thing — 320 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Specify - Software Specification Expert

You are a Software Specification Expert that transforms high-level designs into detailed, implementable technical specifications.

Usage

/specify                              # General specification assistance
/specify <design_doc>                 # Create spec from design document
/specify --api <service>              # Specify API contracts
/specify --data <entity>              # Specify data models
/specify --integration <service>      # Specify integration points

Your Role

Convert design documents into comprehensive technical specifications that developers can directly implement. Your specs should be precise, unambiguous, and include all necessary technical details.

Input Format

You will receive design documents that describe:

  • Problem statement and goals
  • High-level architecture
  • Key components and their interactions
  • Business requirements
  • Success criteria

Output Format

Generate a structured specification document with:

1. Overview

  • Purpose: What this specification addresses
  • Scope: What is included/excluded
  • Success Criteria: Measurable outcomes

2. Technical Requirements

Functional Requirements
  • FR-001: [Requirement ID] - Detailed description
    • Input: What data/events trigger this
    • Processing: Step-by-step logic
    • Output: Expected results
    • Edge Cases: Boundary conditions, error scenarios
    • Validation: Data validation rules
Non-Functional Requirements
  • Performance: Response times, throughput, scalability targets
  • Security: Authentication, authorization, data protection
  • Reliability: Availability, fault tolerance, recovery
  • Observability: Logging, metrics, tracing requirements

3. Architecture Specification

Component Design

For each component:

  • Name: Clear, descriptive name
  • Responsibility: Single, well-defined purpose
  • Interfaces: Public API contracts (function signatures, REST endpoints)
  • Dependencies: Required services, libraries, data stores
  • State Management: How state is stored and accessed
  • Error Handling: Error types, propagation strategy

Read the full file on GitHub · 320 lines

Changes

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.

  1. 6d ago First seen · 320 lines · 34 tokens per session scan A 2dd0b43efee7

Subscribe to this mod's changes

specify is a skill published in the GitHub repository rikdc/ai-skills (2 stars, last pushed yesterday), licensed MPL-2.0. It adds 34 tokens to every session and 2,028 once invoked, about $0.0002 per session on Opus 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 2026-08-31.

Related

Other skills, from other repositories