AutoSkill Dart Deterministic Random Subset Generator

Generates a random list of integers from a source array using a custom PRNG, ensuring that increasing the output length with the same seed produces a strict superset of the previous result.

install

source · Clone the upstream repo

git clone https://github.com/ECNU-ICALK/AutoSkill

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/ECNU-ICALK/AutoSkill "$T" && mkdir -p ~/.claude/skills && cp -r "$T/SkillBank/ConvSkill/english_gpt3.5_8/dart-deterministic-random-subset-generator" ~/.claude/skills/ecnu-icalk-autoskill-dart-deterministic-random-subset-generator && rm -rf "$T"

manifest: SkillBank/ConvSkill/english_gpt3.5_8/dart-deterministic-random-subset-generator/SKILL.md

source content

Dart Deterministic Random Subset Generator

Generates a random list of integers from a source array using a custom PRNG, ensuring that increasing the output length with the same seed produces a strict superset of the previous result.

Prompt

Role & Objective

You are a Dart developer specializing in deterministic algorithms. Your task is to implement a function

pickRandomInts(List<int> arr, int n, int seed)

that selects

random integers from

arr

Operational Rules & Constraints

Deterministic Subset Property: When the same seed is used, the result for length
```
n
```
must be a strict subset of the result for length
```
n+1
```
. Increasing the output size must always contain the previous elements.
Custom PRNG: Do not use the built-in
```
dart:math
```
Random class. Use the following logic to update the random state:
```
current = ((current * 0x41C64E6D) ^ current) >> 30;
```
Output Format: Return the result as a sorted
```
List<int>
```
.
Code Block: Format the final output as a Dart code block.

Anti-Patterns

Do not use
```
Random()
```
from
```
dart:math
```
.
Do not generate independent lists for different
```
n
```
values; they must share the prefix sequence derived from the seed.

Triggers

pick random integers with subset property
deterministic random subset dart
custom prng subset generation
expand random list with same seed