product-from-scratch SKILL.md skillA
product-from-scratch from linegel/threejs-complete-set-of-skill is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add linegel/threejs-complete-set-of-skill/product-from-scratch@git:20260905.3f334d1Pins git:20260905.3f334d1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- linegel/threejs-complete-set-of-skill
- Path
.claude/skills/product-from-scratch/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260905.3f334d1, committed Sep 5, 2026
- First version recorded
- Jul 28, 2026
- Size
- 16,260 bytes
- Repository stars
- 12
- License
- ISC
Design a product change before building it. Decides which of BRD, PRD, XDS, and SDD the change needs, and supplies the story, scenario, and state grammars for writing them, a vocabulary for naming controls precisely, and the review and verification rules. Use for any user-facing change, from a one-line fix to a new journey.
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
# Product from scratch Decide what a person will see and do before code constrains it: the user, the outcome, the journey, the interactions, the states, the failures, and the recovery. When implementation exposes a real constraint, reopen the decision that owns it instead of redesigning around the code. ## Cost rules 1. Design effort stays proportionate to consequence and unresolved uncertainty. For an ordinary change it costs materially less than implementing the change twice. 2. Every artifact and every field must force a distinct decision or improve verification. Remove one that repeatedly does neither. 3. Reuse existing canon before authoring anything. Touching the interface does not earn a new document. When work grows without resolving a decision or reducing a plausible risk, cut process. A process defect is never fixed with another process layer: no manifests, hashes, computed statuses, approval records, evidence taxonomies, reviewer machinery, or artifact quotas. Document lint proves mechanics; it never approves a design. ## The chain ```text BRD when business intent changes PRD when product behaviour changes XDS when a material experience decision exists …
Read the whole file at its exact version.
How to install
mdr add linegel/threejs-complete-set-of-skill/product-from-scratch@sha256:c12042a80cd82dc0The line at the top of this page pins the label git:20260905.3f334d1, 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_o7hepzbtgq2dj773)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jul 28, 2026 and Sep 5, 2026, about one every 40 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260905.3f334d1 latest | 2026-09-05 | 3f334d1 | 16,260 B | A | view · diff |
| git:20260728.9cef1e6 | 2026-07-28 | 9cef1e6 | 22,801 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 (16260 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
linegel/threejs-complete-set-of-skill · 12 stars · license ISC · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_o7hepzbtgq2dj773 GET https://markdownregistry.com/api/v1/resolve?ref=linegel/threejs-complete-set-of-skill/product-from-scratch GET https://markdownregistry.com/api/v1/blob/c12042a80cd82dc087714e78269985907438b178dbf4d4b487579e20d29c7f21
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.