nw-pbt-typescript SKILL.md skillA

nw-pbt-typescript from nwave-ai/nwave is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add nwave-ai/nwave/nw-pbt-typescript@git:20261102.c67d57b

Pins git:20261102.c67d57b 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-pbt-typescript/SKILL.md
Versions recorded: 3
Latest version: git:20261102.c67d57b, committed Nov 2, 2026
First version recorded: Mar 18, 2026
Size: 5,189 bytes
Repository stars: 633
License: MIT

TypeScript/JavaScript property-based testing with fast-check framework and arbitraries.

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

# PBT TypeScript -- fast-check

## Framework Selection

**fast-check** is the dominant PBT framework for TypeScript/JavaScript. No serious competitors.

- 8+ years mature, very actively maintained
- First-class TypeScript types
- Zero runtime dependencies
- Used by jest, jasmine, fp-ts, ramda, js-yaml

## Quick Start

```typescript
import fc from 'fast-check';

test('sort is idempotent', () => {
  fc.assert(
    fc.property(fc.array(fc.integer()), (arr) => {
      const sorted = [...arr].sort((a, b) => a - b);
      const twice = [...sorted].sort((a, b) => a - b);
      expect(sorted).toEqual(twice);
    }),
    { numRuns: 1000 }
  );
});
```

## Generator (Arbitrary) Cheat Sheet

### Primitives
```typescript
fc.integer()                          // any safe integer
fc.integer({ min: 0, max: 99 })
fc.nat()                              // non-negative integer
fc.float()
fc.double()
fc.string()
fc.string({ minLength: 1, maxLength: 50 })
fc.boolean()
fc.constant(null)
fc.constantFrom(1, 2, 3)             // pick from values
```

### Collections
```typescript
fc.array(fc.integer())
fc.array(fc.integer(), { minLength: 1, maxLength: 10 })
fc.set(fc.integer())
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add nwave-ai/nwave/nw-pbt-typescript@sha256:e148f9979a0e7b55

The line at the top of this page pins the label git:20261102.c67d57b, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_khg734tbuljtnm7l.svg)](https://markdownregistry.com/a/art_khg734tbuljtnm7l)

0 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Mar 18, 2026 and Nov 2, 2026, about one every 115 days.

version	committed	commit	size	audit
git:20261102.c67d57b latest	2026-11-02	c67d57b	5,189 B	A	view · diff
git:20260320.d98f3cb	2026-03-20	d98f3cb	5,220 B	A	view · diff
git:20260318.e6a0e19	2026-03-18	e6a0e19	5,198 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (5189 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

GitHub

nwave-ai/nwave · 633 stars · license MIT · pushed 2026-11-07 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_khg734tbuljtnm7l
GET https://markdownregistry.com/api/v1/resolve?ref=nwave-ai/nwave/nw-pbt-typescript
GET https://markdownregistry.com/api/v1/blob/e148f9979a0e7b55e274e480dcbe005526794619735eb89d4553b6c217f849b3

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.

More from nwave-ai/nwave

nw-ab-agent-template SKILL.md skill

nwave-ai/nwave · nWave/skills/nw-ab-agent-template/SKILL.md · KNOWLEDGE — the canonical agent-spec template (frontmatter + body skeleton). Reference loaded by the create/migrate…