# DefinitelyTyped/DefinitelyTyped

The repository for high quality TypeScript type definitions.

Repository: https://github.com/DefinitelyTyped/DefinitelyTyped
Canonical: https://ross.abutalabs.com/products/definitelytyped
Language: TypeScript
License: NOASSERTION
License Family: other
Topics: typescript, definition, dts, types, typings, typescript-definitions, hacktoberfest
Last push: 2026-08-26T23:44:37+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 8, longevity 100
- inputs: {"age_days": 5080, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 51407, forks 30388 (observed 2026-08-28T04:12:11.839859+00:00)

## What it is
Definitely Typed is the central repository of high-quality TypeScript type definitions (.d.ts files) for thousands of popular JavaScript packages without bundled types. Definitions are published to npm under the @types scope and validated by CI type-checking and linting.

## Use cases
- add TypeScript types for a JavaScript npm package
- install @types definitions for a library
- fix type errors when using an untyped JS dependency
- contribute type definitions for a package I use
- find typings for express or react

## When to choose
- you use TypeScript with npm packages that lack their own type declarations
- you want community-maintained, CI-validated typings installed via @types packages

## When to avoid
- the library already ships its own TypeScript types
- you need types for a niche package not accepted into the repo

## Facets
- artifact type: library
- maturity: active
- function: type-system, developer-tools
- domain: programming-languages, developer-tools, web-development
- platform: cross-platform
- tags: typescript, type-definitions, dts, npm, monorepo, nodejs

## Member repositories
- DefinitelyTyped/DefinitelyTyped (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:11.839859+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 2026-08-29T16:19:45.668988+00:00, confidence not recorded.
  - readme: https://github.com/DefinitelyTyped/DefinitelyTyped (fetched 2026-08-28T04:12:11.839859+00:00, sha b079cae790b9)
- Data as of 2026-08-30T08:39:29.467469+00:00.