ddd-best-practices SKILL.md skillA
ddd-best-practices from okhp3/skillz is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add okhp3/skillz/ddd-best-practices@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- okhp3/skillz
- Path
community/ddd-best-practices/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Aug 28, 2026
- Size
- 10,185 bytes
- Repository stars
- 3
- License
- MIT
Domain-Driven Design guidance for modeling complex domains. Use when designing Bounded Contexts or Subdomains, discovering Aggregate boundaries from invariants and transactions, defining Aggregate Roots, designing Domain Events, typed domain failures, or repository contracts, choosing exception vs Result/Either/Option semantics, choosing Repository vs DAO/query service/gateway, splitting oversized Aggregates, coordinating cross-Aggregate consistency, applying Context Mapping patterns…
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
# DDD Best Practices Use this skill when the main question is how to model a domain, where to draw boundaries, or how to structure collaboration between subdomains. ## Working Style 1. Start from the domain problem, not from technical constructs. 2. Build a Ubiquitous Language before writing any code. 3. Keep Aggregates small — consistency boundary, not convenience grouping. 4. Prefer Value Objects when a domain concept has value semantics, not as a blanket wrapper for every primitive. 5. Let Domain Events tell the story of what happened, not what to do next. 6. Never let infrastructure concerns leak into the domain model. ## Design Workflow 1. **Discover the domain.** - Who are the domain experts? What language do they use? - What are the core subdomains (Core, Supporting, Generic)? - Where does the most complex business logic live? 2. **Draw Bounded Contexts.** - One model per context — resist the urge to share models across contexts. - Name each context after a team or capability, not a technical layer. - Define context relationships explicitly (Partnership, Customer-Supplier, Anti-Corruption Layer, etc.). 3. **Design Aggregates.** …
Read the whole file at its exact version.
How to install
mdr add okhp3/skillz/ddd-best-practices@sha256:e59838a5d904cc70The line at the top of this page pins the label v1.0.0, 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_adjoscu2cykzy7lo)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 28, 2026.
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 (10185 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
okhp3/skillz · 3 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_adjoscu2cykzy7lo GET https://markdownregistry.com/api/v1/resolve?ref=okhp3/skillz/ddd-best-practices GET https://markdownregistry.com/api/v1/blob/e59838a5d904cc70f616055452abfa8b1856826cef43a042bdfe1d95564058d7
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.