prd SKILL.md skillA
prd from sethgammon/citadel is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sethgammon/citadel/prd@git:20260611.0f3f8e7Pins git:20260611.0f3f8e7 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sethgammon/citadel
- Path
skills/prd/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260611.0f3f8e7, committed Jun 11, 2026
- First version recorded
- Mar 29, 2026
- Size
- 6,717 bytes
- Repository stars
- 929
- License
- MIT
Generates a Product Requirements Document from a natural language app description. Asks clarifying questions, researches similar apps, defines scope, stack, architecture, and produces a structured PRD that Archon can decompose into a campaign.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# /prd — Product Requirements Document Generator
## When to Use
**Don't use when:** architecture is already defined and you need implementation (use /architect then /archon); adding a small feature to an existing app (use /marshal directly).
- User describes an app or feature to build (greenfield or feature mode)
- Before any Archon campaign for a new project or feature
## Mode Detection
Before starting, determine the mode:
**Greenfield mode**: No existing source files, or user explicitly says "new app" / "from scratch."
Produces a full PRD as described below.
**Feature mode**: The project already has source files (check for `src/`, `app/`, `lib/`,
`package.json` with dependencies, or similar). The user describes a feature to add, not a
whole app ("add auth", "add a dashboard", "add payment processing").
In feature mode:
- Read the existing file tree and `package.json`/equivalent before asking questions
- The existing stack is a given — don't recommend alternatives
- "Architecture" section describes integration points with existing code, not standalone shape
- End conditions MUST include regression checks: "existing tests still pass", "typecheck has no new errors"
…Read the whole file at its exact version.
How to install
mdr add sethgammon/citadel/prd@sha256:a83976ae5708be42The line at the top of this page pins the label git:20260611.0f3f8e7, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_d7gpwbdnnd7fpouy)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Mar 29, 2026 and Jun 11, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260611.0f3f8e7 latest | 2026-06-11 | 0f3f8e7 | 6,717 B | A | view · diff |
| git:20260611.a647953 | 2026-06-11 | a647953 | 6,704 B | A | view · diff |
| git:20260503.631b94d | 2026-05-03 | 631b94d | 6,618 B | A | view · diff |
| git:20260329.6c378a2 | 2026-03-29 | 6c378a2 | 9,028 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6717 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
sethgammon/citadel · 929 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_d7gpwbdnnd7fpouy GET https://markdownregistry.com/api/v1/resolve?ref=sethgammon/citadel/prd GET https://markdownregistry.com/api/v1/blob/a83976ae5708be423b9ea9f932c5e7d06e7f636e46a3f6611e1b8a30455f4ac8
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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