# dudykr/stc

Speedy TypeScript type checker

Repository: https://github.com/dudykr/stc
Canonical: https://ross.abutalabs.com/products/stc
Homepage: https://stc.dudy.dev
Language: Rust
License: Apache-2.0
License Family: permissive
Topics: rust, typescript
Archived: true
Last push: 2024-01-25T14:30:28+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2073, "days_push": 951, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5714, forks 158 (observed 2026-08-28T04:09:28.193950+00:00)

## What it is
stc is a TypeScript type checker written in Rust, aiming to be a much faster alternative to tsc while matching its behavior. The project is officially abandoned and never reached a stable release.

## Use cases
- type-check typescript files faster than tsc
- integrate a fast typescript type checker into a rust toolchain
- build a custom typescript language server
- run type checking in ci with lower latency
- check typescript code with isolatedModules semantics

## When to choose
- you need a fast, embeddable TypeScript type checker in Rust and accept experimental quality
- you want to fork or build upon a Rust-based tsc alternative

## When to avoid
- you need a production-ready, fully compatible TypeScript type checker today
- you expect ongoing maintenance or bug fixes
- you rely on namespaces or non-isolatedModules features

## Facets
- artifact type: library
- maturity: abandoned
- function: type-system, compiler, developer-tools
- domain: programming-languages, developer-tools, compilers
- platform: rust, cross-platform, cli
- tags: typescript, type-checker, static-analysis, tsc-alternative

## Member repositories
- dudykr/stc (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:28.193950+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 2026-08-29T17:53:29.457912+00:00, confidence not recorded.
  - readme: https://github.com/dudykr/stc (fetched 2026-08-28T04:09:28.193950+00:00, sha 28707f514ec0)
  - homepage: https://stc.dudy.dev (fetched 2026-08-29T08:49:00.051922+00:00, sha aa11d453a4b6)
  - site_page: https://stc.dudy.dev/docs/getting-started (fetched 2026-08-29T08:49:00.061054+00:00, sha 09db02715c1f)
  - site_page: https://stc.dudy.dev/docs/roadmap (fetched 2026-08-29T08:49:00.064696+00:00, sha f7c10af0e6cf)
  - site_page: https://stc.dudy.dev/docs/contributing (fetched 2026-08-29T08:49:00.066378+00:00, sha 818c6ce9c516)
- Data as of 2026-08-30T08:39:29.467469+00:00.