cristhianzl/claude-skills-czl · configs/agnostic/skills/writing-prd/SKILL.md

writing-prd skillA

writing-prd is agent-read markdown (skill) from cristhianzl/claude-skills-czl: Author product requirements — PRDs, product specs, one-pagers, PR-FAQs, product briefs — that lead with the problem, define testable success metrics and acceptance criteria, and make non-goals explicit. Use when the user asks to write a PRD, write/define product requirements, write a product spec, write a one-pager, write a PR-FAQ, "write a spec", "define requirements", scope a feature, or draft a product brief. Also use when the request is a half-baked feature idea that needs a problem framed b.

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add cristhianzl/claude-skills-czl/writing-prd@git:20260623.8ddcccf
Exact content
mdr add cristhianzl/claude-skills-czl/writing-prd@sha256:971c25cf59e9b84e

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_wxilkvjw7eyrn6bx.svg)](https://markdownregistry.com/a/art_wxilkvjw7eyrn6bx)

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Versions

versioncommittedcommitsizeaudit
git:20260623.8ddcccf latest2026-06-23 8ddcccf 8,762 BA view · diff
git:20260619.98096d22026-06-19 98096d2 8,599 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8762 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

cristhianzl/claude-skills-czl · 5 stars · license MIT · pushed 2026-09-15 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_wxilkvjw7eyrn6bx
GET https://markdownregistry.com/api/v1/resolve?ref=cristhianzl/claude-skills-czl/writing-prd
GET https://markdownregistry.com/api/v1/blob/971c25cf59e9b84e053b273841d22e9ad475fa667c8d7b04e20bdae23079adf6

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.