Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

September 30 – October 2, 2026
Charlotte Convention Center, Charlotte, NC

Join us for the largest gathering of

Clojure 1.12.5-alpha1 is now available! Find download and usage information on the Downloads page.

• CLJ-2945 - reify - incorrectly transfers reader metadata to runtime object

• CLJ-2228 - constantly - unroll to remove re

Clojure: Zero to REPL

As part of the Clojure team’s efforts to improve the onboarding experience for new users, we have recorded a step-by-step tutorial taking you from zero to a running REPL.

The video begins with instal

Clojure: The Official Documentary premieres April 16th!

From a two-year sabbatical and a stubborn idea to powering the engineering stack of one of the world’s largest fintech companies — this is the story of Clojure.

Feat

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Do you use clojure for Data Science? Please take the survey. Your responses will help shape the future of the Noj

core.async 1.9.847-alpha3 is now available. This release reverts the core.async virtual thread implementation added in alpha2, and provides a new implementation (ASYNC-272).

Threads must block while waiting on I/O operations to complete. "P

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Do you use clojure for Data Science? Please take the survey. Your responses will help shape the future of the Noj

Recently, we completed the 2025 State of Clojure survey. You can find the full survey results in this report.

In the report and the highlights below, "Clojure" is often used to refer to the whole ecosystem of Clojure and its dialects a

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure real-world-data 46: Feb 13

• Clojure Jam 2026: Apr 18-19 & 25-26. Online & free!

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Join the Clojure core team for an update on what we’ve been working on and what’s on our horizon. We’ll save time for a Q&am

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Join the Clojure core team for an update on what we’ve been working on and what’s on our horizon. We’ll save time for a Q&am

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Lexical Complexity in Software Engineering (by Samantha Cohen): Feb 10

• Clojure Jam 2026: Apr 18-1

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Scicloj AI Meetup: Agent-o-rama: Jan 17

• Lexical Complexity in Software Engineering (by Samantha C

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure real-world-data 40: Jan 9

• Scicloj AI Meetup: Agent-o-rama: Jan 17

• Cloju

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Time is running out to take the Clojure surveys! Please help spread the word, and take a moment t

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Help shape the future of Clojure!

Whether you use Clojure, ClojureScript, Babashka, or any other C

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Help shape the future of Clojure!

Whether you use Clojure, ClojureScript, Babashka, or any other C

Clojure 1.12.4 is now available! Find download and usage information on the Downloads page.

• CLJ-2924 - LazySeq - fix visibility issues with non-volatile reads

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Help shape the future of Clojure!

Whether you use Clojure, ClojureScript, Babashka, or any other C

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Help shape the future of Clojure!

Whether you use Clojure, ClojureScript, Babashka, or any other C

It’s time for the annual State of Clojure Survey!

If you use Clojure, ClojureScript, Babashka, or any other Clojure dialect, we would love to get your responses to the following survey:

• State of Clojure 2025

M

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The State of ClojureScript 2025 Survey is live!

If you ever wondered what’s happening in cljs world, this is your cha

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Grab a big cup of coffee or your favorite beverage, because this Deref covers the last three weeks. The Clojure community has been busy!

core.async 1.9.829-alpha2 is now available, which adds support for Java virtual threads (ASYNC-262).

Threads must block while waiting on I/O operations to complete. "Parking" allows the platform to unmount and free the underlying threa

Clojure 1.12.3 is now available! Find download and usage information on the Downloads page.

• CLJ-2919 - Compiler - fix nested compilation emitting for keyword and protocol call sites

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Scicloj AI Meetup 12: Practicing Grain: Sep 30

• Clojure South 2025: Oct 6-7

• Macr

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure real-world-data 35: Sep 19

• Clojure South 2025: Oct 6-7

• Macroexpand 2025

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• Clojure/Conj 2025: Schedule is now live

• Clojure South 2025: Tickets On Sale

• Mac

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure/Conj 2025: Schedule is now live

• Clojure South 2025: Tickets On Sale

• Mac

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure/Conj 2025: Schedule is now live

• Clojure South 2025: Tickets On Sale, Call for Proposals c

Clojure 1.12.2 is now available! Find download and usage information on the Downloads page.

• CLJ-2914 - Compiler - syntax error if qualified instance method expression is missing instance

• CLJ-1798 - Refs - avoid creati

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure/Conj 2025: Early Bird Tickets go away on Aug 20

• Clojure South 2025: Tickets On Sale, Call

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Clojure/Conj 2025: Early Bird Tickets Available Now!

• Clojure South 2025: Tickets On Sale and Call

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Macroexpand 2: Aug 9

• Clojure/Conj 2025: Early Bird Tickets Available Now!

• Cloju

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• Datomic Workshop: July 31

• Clojure/Conj 2025: Early Bird Tickets Available Now!

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The Clojure/conj 2025 Call for Presentations is open now until July 27! We are seeking proposals for both 30 minute sessions and 10 minute li

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The Clojure/conj 2025 Call for Presentations is open now until July 27! We are seeking proposals for both 30 minute sessions and 10 minute li

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The Clojure/conj 2025 Call for Presentations is open now until July 27! We are seeking proposals for both 30 minute sessions and 10 minute li

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The Clojure/conj 2025 Call for Presentations is open now until July 27! We are seeking proposals for both 30 minute sessions and 10 minute li

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

The Clojure/conj 2025 Call for Presentations is open now until July 27! We are seeking proposals for both 30 minute sessions and 10 minute li

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

Clojure/Conj 2025 will be held Nov 12-14 in Charlotte, NC. Early Bird Registration is now open. We look forward to seeing you in-person and o

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Vibe Coding With Clojure-MCP: Bruce Hauman/Luke Burton/Gene Kim - IT Revolution

• 7 UIs

Clojure 1.12.1 is now available! Find download and usage information on the Downloads page.

• CLJ-2899 - Revert change in semantics of qualified symbol in invocation position if field and method of same name

• CLJ-2898 -

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

• Let CoPilot extend VS Code with Backseat Driver and Joyride - CalvaTV

• Clojure MCP Dem

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS).

A huge thanks to Anton Fonarev who has put in a ton of work aggregating these links for the last couple of years! It’s a lot to keep up with

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS). Thanks to Anton Fonarev for link aggregation.

• E102 - Pedestal with hlship - ClojureStream Podcast

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS). Thanks to Anton Fonarev for link aggregation.

• A quick demo of core.async.flow - ClojureTV

…

core.async 1.9.808-alpha1 is now available, featuring the first release of core.async.flow. You can read more about core.async.flow in the rationale and the docs.

core.async.flow is in alpha state - all APIs are still subject to

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS). Thanks to Anton Fonarev for link aggregation.

• Fogus guests on Apropos Clojure 2025-04-22 - apropos cloj

Welcome to the Clojure Deref! This is a weekly link/news roundup for the Clojure ecosystem (feed: RSS). Thanks to Anton Fonarev for link aggregation.

• Episode 10 …​ the refactoring continues until the code im