---
name: pseudo-random
description: Use when implementing or debugging code that uses @suaveplan/pseudo-random: Deterministic seeded PRNG implementations (Mulberry32, SFC32, Xoshiro256++, CounterRng) with offset/fork/checkpoint/restore semantics.
---

# @suaveplan/pseudo-random

Deterministic, seeded pseudo-random number generators (PRNGs) conforming to the `Rng` interface from `@suaveplan/types`. Ships four algorithms — Mulberry32, SFC32, Xoshiro256++, and CounterRng — with a unified `SeededRng` surface that includes `nextUint32`, `nextFloat`, `skip`, `at`, `fork`, `checkpoint`, and `restore`. Use this package when you need reproducible randomness (procedural generation, game simulations, property tests) or seek O(1) access to arbitrary positions in the sequence. For cryptographically secure randomness use `@suaveplan/random` (CSPRNG-backed) or `@suaveplan/crypto` (raw bytes). Utility functions `shuffle`, `sample`, `choice`, and `weightedChoice` accept any `Rng` and work with both seeded and crypto-backed sources.

## When to use this skill

- Implementing or debugging code that imports `@suaveplan/pseudo-random`.
- The task touches: see package README.
- You need API guidance for this package's exports.

## Quick reference

```ts
import { /* see API Reference below */ } from "@suaveplan/pseudo-random";
```

## Dependencies

Workspace dependencies: `@suaveplan/error`, `@suaveplan/types`

## Where to read more

This skill is intentionally short. The package's own documentation is the authoritative source — read these in order:

1. **`packages/foundation/pseudo-random/README.md`** — overview, install, quick-start, module index
2. **`packages/foundation/pseudo-random/src/**/*.md`** — co-located docs per implementation file (Purpose, Features, Basic + Advanced examples, full API reference, Implementation notes — all packages  ship ≥200 words per module)
3. **`packages/foundation/pseudo-random/package.json`** `exports` map — every subpath you can import from

When the user asks an API question, read the relevant co-located `.md` first; do not answer from training-data memory.

## See also

- `@suaveplan/error`
- `@suaveplan/types`

---

_This SKILL.md is auto-generated by `suaveplan-skills/scripts/generate-skills.ts` from the package's README. Do not edit by hand — re-run the generator after the README changes._