Most agent-friendly Scala repos

6 Scala repos, ranked by their overall score: the average across every agent we score. The average Scala repo scores 68.9, and delta-io/delta leads with 84.7.

What Scala repos most often miss

Pre-commit / git hooks: 17% pass rate
Reproducible dev env: 28% pass rate
AGENTS.md / CLAUDE.md: 50% pass rate

Checks that only one agent reads are left out, since almost no repo has them. See the methodology for what each check looks for.

Leaderboard — page 1 of 1 for Scala repos, overall
Rank	Repo	Stars	Score	External link
1	delta-io/deltaGitHub An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs	9k ★	84.7	open
2	apache/sparkGitHub Apache Spark - A unified analytics engine for large-scale data processing	44.2k ★	76.8	open
3	zio/zioGitHub ZIO — A type-safe, composable library for async and concurrent programming in Scala	4.4k ★	75.6	open
4	scala/scala3GitHub The Scala 3 compiler, also known as Dotty.	6.3k ★	75.1	open
5	playframework/playframeworkGitHub The Community Maintained High Velocity Web Framework For Java and Scala.	12.6k ★	52.5	open
6	gatling/gatlingGitHub Modern Load Testing as Code	7k ★	48.7	open