nw-fp-domain-modeling SKILL.md skillA
nw-fp-domain-modeling from nwave-ai/nwave is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nwave-ai/nwave/nw-fp-domain-modeling@git:20260407.2d944b1Pins git:20260407.2d944b1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nwave-ai/nwave
- Path
nWave/skills/nw-fp-domain-modeling/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260407.2d944b1, committed Apr 7, 2026
- First version recorded
- Mar 17, 2026
- Size
- 9,437 bytes
- Repository stars
- 633
- License
- MIT
Domain modeling with algebraic data types, smart constructors, and type-level error handling.
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
# FP Domain Modeling Domain modeling with types. Make illegal states unrepresentable, workflows as pipelines, error handling at the type level. Cross-references: [fp-principles](../nw-fp-principles/SKILL.md) | [fp-hexagonal-architecture](../nw-fp-hexagonal-architecture/SKILL.md) | [fp-algebra-driven-design](../nw-fp-algebra-driven-design/SKILL.md) --- ## 1. The Two Building Blocks [STARTER] All domain types compose from two operations: - **AND (Record Types)**: Value has ALL of these fields. Order requires CustomerInfo AND ShippingAddress AND OrderLines. - **OR (Choice Types)**: Value is ONE OF these alternatives. ProductCode is either WidgetCode OR GizmoCode. Combined recursively, these express virtually any domain structure. --- ## 2. Domain Wrappers for Primitives [STARTER] Never use primitives directly in the domain model. Each domain concept gets its own wrapper type. **What**: Wrap primitives so the compiler distinguishes CustomerId from OrderId. **When**: Every primitive with domain meaning. **Why**: Prevents accidental mixing (compiler rejects comparing CustomerId with OrderId). Each wrapper carries its own validation rules. The type name IS the documentation. …
Read the whole file at its exact version.
How to install
mdr add nwave-ai/nwave/nw-fp-domain-modeling@sha256:10f78944b4f90344The line at the top of this page pins the label git:20260407.2d944b1, 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_o3tlmwlqriuv3v3f)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Mar 17, 2026 and Apr 7, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260407.2d944b1 latest | 2026-04-07 | 2d944b1 | 9,437 B | A | view · diff |
| git:20260320.d98f3cb | 2026-03-20 | d98f3cb | 9,387 B | A | view · diff |
| git:20260318.e6a0e19 | 2026-03-18 | e6a0e19 | 9,365 B | A | view · diff |
| git:20260317.1d16147 | 2026-03-17 | 1d16147 | 9,356 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 (9437 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
nwave-ai/nwave · 633 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_o3tlmwlqriuv3v3f GET https://markdownregistry.com/api/v1/resolve?ref=nwave-ai/nwave/nw-fp-domain-modeling GET https://markdownregistry.com/api/v1/blob/10f78944b4f9034486a5be98521308fe6839f6034e171f43777394e6f474ae3b
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.