A planning tool that turns a product requirements document, or PRD, into a multi-phase implementation plan saved as a Markdown file. A PRD describes what a product or feature should do.

Use it to plan features with tracer-bullet vertical slices: small end-to-end pieces that prove the main path before the rest is built.

It turns broad product requirements into smaller delivery stages, making the work easier to sequence and track.

prd-to-plan — Skill for Claude Code and Codex by JianyuLin1999

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.

Any agent

npx skills add JianyuLin1999/JianyuLin-agent-craft --skill prd-to-plan

Clone the repo

git clone --depth 1 https://github.com/JianyuLin1999/JianyuLin-agent-craft

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan/github.svg)](https://agentmods.dev/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan)

Your own site

<a href="https://agentmods.dev/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan"><img src="https://agentmods.dev/badge/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan"><img src="https://agentmods.dev/badge/skills/jianyulin1999/jianyulin-agent-craft/prd-to-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 61 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 700 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00061	$0.00700
Opus 5.5	$0.00024	$0.00280
Sonnet 5.5	$0.00012	$0.00140
Haiku 4.5	$0.00006	$0.00070

Measured 1mo ago against content hash 96fa3e558ad0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

prd-to-plan 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 1mo 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-to-plan/SKILL.md · 108 lines

The source is not reproduced here

No licence file

Read it on GitHub

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.

1mo ago First seen · 108 lines · 61 tokens per session scan A 96fa3e558ad0

Subscribe to this mod's changes

prd-to-plan is a skill published in the GitHub repository JianyuLin1999/JianyuLin-agent-craft (2 stars, last pushed 19d ago), with no licence file. It adds 61 tokens to every session and 700 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-17.

Planning Project management

prd-to-plan next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
prd-to-planJianyuLin1999/JianyuLin-agent-craft	Skill	2	19d ago	none	A	61	Claude Code, Codex
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