ddd skillA
ddd is agent-read markdown (skill) from usetemi/skills: Write, revise, or consolidate DOMAIN.md, a repository's domain model, by interviewing the user as the domain expert. Use to create DOMAIN.md, to model a domain with domain-driven design (ubiquitous language, entities, value objects, domain services, aggregates, domain events, rules and invariants), when a task introduces a term, rule, or concept absent from DOMAIN.md, when code and DOMAIN.md disagree, or to remove inconsistencies and redundancies from an existing DOMAIN.md. Produces the document.
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
# Domain-Driven Design Agents already know domain-driven design. What they lack is the domain: the terms, rules, and boundaries of this business. `DOMAIN.md` supplies that. It records the ubiquitous language, the model, and the rules and invariants, so every later task starts from the same model instead of re-deriving one from code. This skill writes and maintains `DOMAIN.md` at the repository root. Treat the user as the domain expert: extract rules through concrete scenarios and write down only what they confirm. The skill does not change code. Bringing the implementation in line with the model is separate work that reads `DOMAIN.md`. [`references/domain-driven-design.md`](references/domain-driven-design.md) is this skill's definition of domain-driven design. Read it: - before the first interview in a repository, for the interview technique and the modeling concepts - when mapping evidence from an existing system to concepts; its "Bring Key Concepts Into Light" and "Review an Existing System" sections say what to look for - during a consolidation pass, for what makes a term or boundary precise The reference says to keep the model and the implementation aligned. That …
Read the whole file at its exact version.
How to install
mdr add usetemi/skills/ddd@git:20260921.1d9903emdr add usetemi/skills/ddd@sha256:dd6012cdec443b44Pin 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_ze7my57wsokl3tgp)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260921.1d9903e latest | 2026-09-21 | 1d9903e | 8,626 B | A | view · diff |
| git:20260921.3066ef1 | 2026-09-21 | 3066ef1 | 8,128 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 (8626 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
usetemi/skills · 6 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ze7my57wsokl3tgp GET https://markdownregistry.com/api/v1/resolve?ref=usetemi/skills/ddd GET https://markdownregistry.com/api/v1/blob/dd6012cdec443b4418736ea3ef45393fa14271316b5a5e0b85ce1b7a3c89839a
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.