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November 10th, 2026, ISSUE 631

READING

Checking Relevance With Verdict4s

Salar Rahmanian shows how he filters articles for Scala News with verdict4s, his new Scala 3 library giving typed access to decision models such as TypeSafe AI's Jev.
Salar Rahmanian (@SalarRahmanian)
Capture Checking Notes

Notes on capture checking, the experimental Scala 3 feature that tracks which capabilities (files, connections, other resources) a value's type has captured.
HKT
Apache DataSketches in Scala: HLL, KLL & Frequent Items

Learn HLL, KLL and Frequent Items sketches in Scala with Apache DataSketches, and inspect stored sketches with SketchProbe.
Yadu Krishnan (@yadukrishnank)
Security advisory: update your JDK (CVE-2026-91403)

CVE-2026-91403: compromised CA certificates ship with all supported JDKs (8 to 27), affecting any JVM app, including build tools fetching dependencies. Update your JDK, or distrust the certificates manually until you can.
Piotr Chabelski, Eugene Yokota (@scala_lang)
Introducing Eezo: Next-gen Scala Web Framework

A hands-on tour of Eezo, the direct-style Scala 3 web framework: from a case class to a Postgres table, derived CRUD routes, auth guards and live components synced across tabs.
Riccardo Cardin (@riccardo_cardin)

VIDEOS

Scala Summit 2026 recordings

All talks from Scala Summit 2026, recorded live in San Francisco on October 19th.
SF Scala (@sfscala)

RELEASES

sketchprobe

Inspect and decode Apache DataSketches binaries. Find a serialized sketch in MongoDB, Parquet, Delta, Spark or Databricks, and get a readable report in the browser or CLI.
Yadu Krishnan (@yadukrishnank)
madrileno

AI-first Scala 3 backend template - http4s + Skunk + cats-effect, with MCP servers and docs wired for assistant-driven development.
Iterators (@iteratorshq)
Scala 3.3.9 LTS is now available!

Patch release of the 3.3 LTS line backporting fixes from 3.9.0: better Java generic signatures, exhaustiveness checks for sealed Java classes, a warning on dubious negative literals, and lighter Scaladoc.
Tomasz Godzik (@scala_lang)

EVENTS

Art of Scala, Dec 3rd, Warsaw, Poland

One-day, non-commercial Scala conference in Warsaw (in person and online), with talks on Metals 2, Rig, Cellar, cross-platform Scala games and more.
Evolution

VARIA

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  1. Scala Times Issue #631

    Checking Relevance With Verdict4s. Capture Checking Notes. Apache DataSketches in Scala: HLL, KLL & Frequent Items. Security advisory: update your JDK (CVE-2026-91403). Introducing Eezo: Next-gen Scala Web Framework.

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