Effect-TS/effect has 17.4k stars and gained +93 of them in the last 7 days, a 0.5% change. It is written in TypeScript, grouped under devtools, released under MIT. A merged pull request waits a median of 2h from opening to merge, measured on 271 pull requests. Last pushed on 28 Oct 2026.
Star growth per time window: stars gained, growth percentage, the star count at the start of the period, and whether the figure was measured from our own two-hour intraday snapshots, daily snapshots, or GitHub’s rebuilt star history, for the last 6 hours, the last 12 hours, today, the last 7 days, the last 30 days, and the last year. A period with no current measurement is left blank rather than shown as zero.
Period
Stars gained
Growth
From
Measured
Last 6 hours
—
—
—
Not measured
Last 12 hours
+6
0.0%
17.4k at 04:33
Intraday snapshots, measured 16:49
Today
0
0.0%
17.4k on 27 Oct 2026
Daily snapshots
Last 7 days
+93
0.5%
17.3k on 18 Oct 2026
Weekly history
Last 30 days
+1.2k
7.4%
16.2k on 27 Sep 2026
Weekly history
Last year
+5.9k
51.3%
11.5k on 26 Oct 2025
Weekly history
A period with no current measurement is left blank: a delta needs a measurement at both ends of the period. The 6- and 12-hour periods need two intraday measurements exactly that far apart, the day-and-longer periods need snapshots on both dates, and the last year also needs star history from a year ago, which we keep for one year.
Copy either snippet into the repository's README. The badge shows total stars and the gain over the last 7d (the same window as the one below) and is hotlinked directly, with no account or token.
<a href="https://bestofgit-blue.vercel.app/projects/Effect-TS/effect">
<img src="https://bestofgit-blue.vercel.app/badge/Effect-TS/effect.svg?window=7d"
alt="Star and growth badge for Effect-TS/effect on BestOfGit" />
</a>
2 Oct 2026First seen on GitHub Trending · rank 5· same day
Stars: 16.3k when it entered our index, 17.4k on the last capture we hold (28 Oct 2026), so +1.2k in that span. That span is our own measurement window, not a claim about what happened before it.
We hold 9 mentions for it, the oldest dated 5 Feb 2023 and the first written into our database on 26 Oct 2026. Thread dates come from the source, not from when we fetched them.
What the web says
9 items so far: 9 on Hacker News, 0 on Reddit; 0 in the last 7 days, 1 in the last 30. Checked by the pipeline, which re-scans trending repositories every few hours. Last check .
Almost every single JavaScript package is on NPM. Being on NPM does not automatically increase your attack vectors. The vast majority of the npm attacks have been "Supply Chain Attacks"[0] where an upstream dependency is injected with malicious code, then automatically downloaded and executed when users update a package. If you look at Effect's package.json on GitHub[1], you'll see that they have…
Great project. Clear goal, well executed, very nice API (safe, terse, clear). I use Effect CLI https://github.com/Effect-TS/effect/tree/main/packages/cli for the same reasons. It has the advantage of fitting within the ecosystem. For example, I can reuse existing schemas.
Just as context for anyone curious: Scala is even more "powerful" than TS or Rust as it has real HKT (higher-kinded types), and for example Effect.TS needs to emulate/simulate it. https://github.com/Effect-TS/effect/blob/main/packages/effec...
And if you want more power at the type level, use effect/schema https://github.com/effect-ts/effect/tree/main/packages/schem...
Competes with
Repositories in the same collection, of a comparable size (within 5× in stars) and from a different owner, that were discussed in the same threads. Same-owner projects are excluded because they are usually pieces of the same tool, not rivals. A repository also stays out if the two never met in a discussion.
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