prd

prd is a skill for Claude Code, Codex from jh941213/codex-lattice. It costs 95 tokens per session (512 once invoked), scanned A, original, MIT.

A guide for turning an idea into product and software requirement documents. It organizes the problem, users, market, features, risks, and technical specification into files such as PRD.md and SPEC.md.

In plain words
What is it for?
Use it to plan a product, structure user stories and features, define technical details and security constraints, and create or update a complete requirements package.
Why use it?
It helps replace an informal idea with agreed requirements that developers can build and check. It also makes priorities, acceptance conditions, exclusions, and open questions explicit.

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/jh941213/codex-lattice/prd
Any agent
npx skills add jh941213/codex-lattice --skill prd
Clone the repo
git clone --depth 1 https://github.com/jh941213/codex-lattice

Made for: Claude Code, Codex.

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 prd

README.md
[![agentmods](https://agentmods.dev/badge/skills/jh941213/codex-lattice/prd.svg)](https://agentmods.dev/skills/jh941213/codex-lattice/prd)
Your own site
<a href="https://agentmods.dev/skills/jh941213/codex-lattice/prd"><img src="https://agentmods.dev/badge/skills/jh941213/codex-lattice/prd.svg" alt="Measured on agentmods" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 512 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 $0.00095 $0.00512
Opus 5 $0.00048 $0.00256
Sonnet 5 $0.00019 $0.00102
Haiku 4.5 $0.00010 $0.00051

Measured 4d ago against content hash b18f19008e3f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prd 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 4d 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/prd/SKILL.md · 57 lines

What it actually says

PRD

Codex에서는 $prd 스킬로 기획 산출물을 만든다.

산출물

prd/
├── CPS.md
├── PRD.md
├── MARKET.md
├── USERS.md
├── FEATURES.md
├── RISKS.md
├── SPEC.md
└── APPENDIX.md

절차

  1. 기존 prd/가 있으면 이어서 진행할지 확인한다.
  2. 복잡도 판정:
    • Low: 단순 기능/도구/CLI, 리서치 최소화.
    • Mid: 새 모듈/서비스/라이브러리, 핵심 리서치만 수행.
    • High: 새 제품/SaaS/플랫폼, 리서치와 인터뷰를 충분히 수행.
  3. CPS를 먼저 확정한다:
    • Context: 어떤 상황/환경인가.
    • Problem: 어떤 문제가 있고 정량 지표는 무엇인가.
    • Solution: 성공 후 어떤 상태가 되어야 하는가.
  4. 필요한 질문은 한 번에 1-3개만 한다.
  5. 기능은 사용자 스토리, 인수조건, 우선순위, 제외 범위까지 쓴다.
  6. SPEC에는 기술 스택, 아키텍처, API, 데이터 모델, 보안/배포 제약을 기록한다.
  7. 마지막에 FEATURES.mdSPEC.md가 서로 맞는지 검증한다.

리서치

시장/기술 정보가 최신성에 민감하면 공식 문서, GitHub, 웹 검색 결과를 확인하고 출처를 APPENDIX.md에 남긴다.

출력

## PRD Result
- created/updated:
- unresolved questions:
- assumptions:
- next skill:
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. 4d ago First seen · 57 lines · 95 tokens per session scan A b18f19008e3f

Subscribe to this mod's changes

prd is a skill published in the GitHub repository jh941213/codex-lattice (19 stars, last pushed 3mo ago), licensed MIT. It adds 95 tokens to every session and 512 once invoked, about $0.0005 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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