prd-mastery SKILL.md skillA
prd-mastery from coco-research/coco is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add coco-research/coco/prd-mastery@git:20261008.90cf64cPins git:20261008.90cf64c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- coco-research/coco
- Path
skills/prd-mastery/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261008.90cf64c, committed Oct 8, 2026
- First version recorded
- Apr 26, 2026
- Size
- 846 bytes
- Repository stars
- 629
- License
- Apache-2.0
Pointer to the upstream skill for writing PRDs grounded in the existing repo, with a fixed output folder, installed from upstream.
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-mastery Coco does not ship this skill because the upstream has no licence file, so it points to the original instead. The name prd-mastery stays so /prd-mastery still resolves. Upstream calls the skill ba-prd-skills. ## Install from upstream Review the upstream repository before you run its installer; Coco does not vet or pin it. ```bash npx skills add gocallum/nextjs16-agent-skills ``` Source: https://github.com/gocallum/nextjs16-agent-skills/tree/531ee5767d772aa21ed2d9a08e441527c812d3e1/skills/ba-prd-skills Coco will not reproduce the upstream text. If you are the author and want this link removed or changed, see docs/personas/TAKEDOWN.md.
Read the whole file at its exact version.
How to install
mdr add coco-research/coco/prd-mastery@sha256:66c0eee4713d9651The line at the top of this page pins the label git:20261008.90cf64c, 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_qq5m235mnguhkkpm)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Apr 26, 2026 and Oct 8, 2026, about one every 55 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261008.90cf64c latest | 2026-10-08 | 90cf64c | 846 B | A | view · diff |
| v1.0 | 2026-09-14 | e75f220 | 16,708 B | A | view · diff |
| v1.0 | 2026-08-02 | 1479e32 | 16,711 B | A | view · diff |
| v1.0 | 2026-04-26 | d53cc6c | 16,700 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 (846 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
coco-research/coco · 629 stars · license Apache-2.0 · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_qq5m235mnguhkkpm GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/prd-mastery GET https://markdownregistry.com/api/v1/blob/66c0eee4713d965138000bea935d7d36c34bd599b39d9ae2d18adfa437b03820
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.