# gvergnaud/hotscript

A library of composable functions for the type-level! Transform your TypeScript types in any way you want using functions you already know.

Repository: https://github.com/gvergnaud/hotscript
Canonical: https://ross.abutalabs.com/products/hotscript
Language: TypeScript
License: MIT
License Family: permissive
Topics: typescript, type-level-programming
Last push: 2024-12-28T03:19:05+00:00

## Health v2 (maintenance only)
Score: 31/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 92
- inputs: {"age_days": 1298, "days_push": 613, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3677, forks 60 (observed 2026-08-28T04:08:13.690302+00:00)

## What it is
HotScript is a TypeScript library of composable type-level functions for transforming types, offering higher-order functions like Map, Filter, and Pipe that operate on tuples, strings, numbers, and object types. It lets developers write complex type manipulations using familiar functional programming patterns.

## Use cases
- transform typescript types at the type level
- map filter and reduce over tuple types
- perform type-level math operations on number literal types
- compose type transformations with a pipe
- define custom type-level lambda functions
- transform object type keys and values
- type-level pattern matching

## When to avoid
- your project uses plain JavaScript or another language
- you need a stable, frozen API - the library is a work in progress with possible breaking changes
- you only need simple built-in TypeScript utility types

## Facets
- artifact type: library
- maturity: active
- function: type-system, serialization, parser, developer-tools
- domain: programming-languages, developer-tools, frontend
- platform: cross-platform
- tags: typescript, type-level-programming, type-transformations, higher-order-types, type-utilities, nodejs

## Member repositories
- gvergnaud/hotscript (main) score 31

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.690302+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:31:15.761948+00:00, confidence not recorded.
  - readme: https://github.com/gvergnaud/hotscript (fetched 2026-08-28T04:08:13.690302+00:00, sha b0221527db41)
  - registry_npm: https://registry.npmjs.org/hotscript (fetched 2026-08-29T09:25:28.399613+00:00, sha 600288151b78)
- Data as of 2026-08-30T08:39:29.467469+00:00.