# Effect-TS/effect

> A TypeScript library for building robust production applications: typed errors, dependency injection, structured concurrency, tracing, and schema validation.

- Magnitude: 4.4 out of 10 — Breakout
- Stars: 16,403 total · +39 stars today, ≈ 74 by evening
- Star trust: star growth looks organic
- Category: Developer tools · Language: TypeScript · License: MIT · Created: 2019-11-13 · Last push: 2026-10-02
- GitHub: https://github.com/Effect-TS/effect · Homepage: https://effect.website · Page: https://gitnova.dev/en/r/Effect-TS/effect

## Useful for

- Build a service with dependency injection and typed errors
- Add OpenTelemetry tracing to a TypeScript application
- Connect a SQL client to PostgreSQL or SQLite via @effect/sql

## Why it’s here

- 39 stars so far today, about 74 expected by the end of the day. The usual pace is 20 per day, so that's 3.7× as much.
- Over the last two days the pace is 6.1× that of the previous week and a half.
- The spike has held for 2 days in a row — not a one-off blip.
- GitHub Trending today: #16, +76 stars.
- GitHub Trending TypeScript today: #5, +76 stars.
- Hacker News: “Effect 4.0” — 72 points, 18 h ago.
- Recent forks include notable developers: @gunta (227 followers).

## Star trust

Star growth looks organic.

Star-trust labels are heuristics based on the repository’s behavior, not a check of every stargazer.

## Numbers

- Forks: 796
- Issues and pull requests: 8,639
- Watchers: 39
- Average over the last week: 33 per day
- Usual pace: 20 per day
- Stars in the last hour (measured): 14
- Latest release: @effect/openapi-generator@4.0.0 (2026-10-01)

## Stars per day, last 30 days (oldest → newest, today is partial)

2026-09-03 … 2026-10-02: 40, 25, 12, 14, 33, 20, 14, 14, 31, 25, 13, 21, 32, 9, 18, 14, 23, 11, 20, 19, 14, 18, 9, 7, 13, 8, 9, 25, 92, 39

## Hacker News

- Effect 4.0 — 72 points, 49 comments: https://news.ycombinator.com/item?id=49925812

## Spotted in now

- GitHub Trending today: #16, +76 stars
- GitHub Trending TypeScript today: #5, +76 stars

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Magnitude (0–10) measures how fast and how unusually interest in a repository is growing right now. It is not a quality score.
Days are UTC. “So far today” is a fact; “expected by the end of the day” is a forecast.
Summaries and use cases are written by an LLM (DeepSeek V4.1 Flash) from the README and may be inaccurate: verify specific claims (benchmarks, speed, hardware) in the repository itself.
Data as of 2026-10-02 13:20 UTC, updated every 30 minutes.