spec

A workflow that turns a product requirements document, or PRD, into a detailed requirements file. It uses EARS, a format that describes when a system should respond and what it should do.

In plain words
What is it for?
Use it to read a PRD, ask questions that clarify the project, and write structured requirements to specs/requirements.md.
Why use it?
It helps turn broad project plans into clearer, testable statements before development begins.

Skill for Claude CodeCodex

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/johncrickett/ai-coding-workflow/spec
Any agent
npx skills add JohnCrickett/ai-coding-workflow --skill spec
Clone the repo
git clone --depth 1 https://github.com/JohnCrickett/ai-coding-workflow

Made for: Claude Code, Codex.

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 220 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 $0.00016 $0.00220
Opus 5 $0.00008 $0.00110
Sonnet 5 $0.00003 $0.00044
Haiku 4.5 $0.00002 $0.00022

Measured 2d ago against content hash f09c065261ba, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

spec 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 2d 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.

skills/spec/SKILL.md · 27 lines

What it actually says

Requirements Specification

Instructions

  1. Read the high level PRD file, probably in specs/prd.md
  2. Ask the user questions to help refine a set of requirements for the project.
  3. Use the The Easy Approach to Requirements Syntax for the requirements, write them to specs/requirements.md

The Easy Approach to Requirements Syntax (EARS) is a mechanism to gently constrain textual requirements. The EARS patterns provide structured guidance that enable authors to write high quality textual requirements.

Generic EARS syntax:

The clauses of a requirement written in EARS always appear in the same order. The basic structure of an EARS requirement is: While , when , the shall

The EARS ruleset states that a requirement must have: Zero or many preconditions; Zero or one trigger; One system name; One or many system responses.

Examples

Please generate the requirements. Create requirements. Create the requirements from the PRD. Write a requirements spec. Create the requirements.

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. 2d ago First seen · 27 lines · 16 tokens per session scan A f09c065261ba

Subscribe to this mod's changes

spec is a skill published in the GitHub repository JohnCrickett/ai-coding-workflow (16 stars, last pushed 5mo ago), licensed MIT. It adds 16 tokens to every session and 220 once invoked, about $0.0001 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 2026-08-30.

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