product-from-scratch skillA
product-from-scratch is agent-read markdown (skill) from linegel/threejs-complete-set-of-skill: 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..
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.
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@git:20260905.3f334d1mdr add linegel/threejs-complete-set-of-skill/product-from-scratch@sha256:c12042a80cd82dc0Pin 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.
[](https://markdownregistry.com/a/art_o7hepzbtgq2dj773)
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Versions
| 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 · 9 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 agent 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.