Annually-Funded Developers' Update: November and December 2025

Hello Fellow Clojurists!

This is the sixth and final report from the 5 developers who received Annual Funding in 2025. You can review their reports from throughout the year here:

Jan/Feb 2025
March/April 2025
May/June 2025
July/Aug 2025
Sept/Oct 2025

Thanks everyone for the fantastic work!

Dragan Djuric: Neanderthal, Deep Diamond, Diamond ONNX Runtime
Eric Dallo: ECA, clojure-lsp
Michiel Borkent: clj-kondo, Reagami, Squint, babashka, SCI, and more…
Oleksandr Yakushev: CIDER nREPL, Orchard, clj-async-profiler, Virgil
Peter Taoussanis: Telemere, Tufte, Sente, Tempel, Carmine, Trove

Dragan Djuric

2025 Annual Funding Report 6. Published January 4, 2026.

My goal with this funding in 2025 is to support Apple silicon (M cpus) in Neanderthal (and other Uncomplicate libraries where that makes sense and where it’s possible).

Having achieved a lot of the goals for this project in 2025 in the previous 10 months, in this funding period, my main effort was concentrated on the icing on the cake.

• I improved support for various data types in Deep Diamond (including :double)
• improved the implementation of the info method in DD
• released Deep Diamond 0.41.0
• improved cuda handling of :long descriptors
• extended Neanderthal Vector with the support for Tensor protocols,
• extended Neanderthal Matrix with the support for Tensor protocols,
• simplified the code in various places,
• wrote new tests,
• GE matrices are now also tensors
• fixed the transfer support for integer matrices
• implementated integer kernels for vectors and GE matrices in CUDA,
• updated Apple BNNS tensor to be compatible with the changes in the last 3-4 months,
• fixed leftover reflections in the old BNNS-based engine in DD
• released Neanderthal 0.60.0,
• released Deep Diamond 0.42.0,
• Update upstream onnxruntime to 1.23.2, also build it locally with CUDA to update diamond-onnxrt,
• released diamond-onnxrt 0.21.0

I released several new versions of Uncomplicate libraries with these user-facing improvements including:

• Deep Diamond
• Neanderthal
• Diamond ONNX Runtime

Hammock time. Did some research on LLMs and the future Clojure implementation of high-level LLMs based on Diamond ONNX Runtime

I also wrote a tutorial on dragan.rocks. I had plans to write more, but couldn’t find time and energy, since December was especially full with lectures at the university, and I did not want to risk burnout :)

Eric Dallo

2025 Annual Funding Report 6. Published January 6, 2026.

What a year! This was probably the year that I most commited and worked in some many things for Clojure community, all of that thanks to ClojuristsTogether, thank you very much! In November I met so many people at ClojureConj that I work for 5 years and never met personally, it was a very good feeling to talk about so many subjects, projects, and hear about the best people in Clojure community. Check it out the picture with the biggest names in developer tooling for Clojure!

(From left to right: Eric Dallo, Rich Hickey, Peter Strömberg, Michiel Borkent, and Arthur Fücher)

I spent some time preparing my talk that I gave there about ECA which should be available soon for anyone interested.

eca

ECA is growing even faster, with more people using, testing, finding bugs, asking for features, and **I’m confident to say that after 6 months, ECA is a tool as good comparing with big players in the market, being free, OSS, written in Clojure and so much extensible, I’m really happy with the result so far and there are so many ideas and improvements I wanna do next year thanks to community sponsor and support!

0.78.2 - 0.87.2

• Add workspaces to /doctor
• Improve LLM request logs to include headers.
• Add openai/gpt-5.1 to default models.
• Fix regression exceptions on specific corner cases with log obfuscation.
• Fix absolute paths being interpreted as commands. #199
• Remove non used sync models code during initialize. #100
• Fix system prompt to mention the user workspace roots.
• Improve system prompt to add project env context.
• Add support to rollback messages via chat/rollback and chat/clear messages. #42
• Add new models to GitHub config (Gpt 5.1 and Opus 4.5).
• Update anthropic default models to include opus-4.5
• Update anthropic default models to use alias names.
• Fix binary for macos amd64. #217
• Support rollback file changes done by write_file, edit_file and move_file. #218
• Improve rollback to keep consistent UI before the rollback, fixing tool names and user messages.
• Support nested folder for rules and commands. #220
• Fix custom tools output to return stderr when tool error. #219
• Support dynamic string parse (${file:/path/to/something} and ${env:MY_ENV}) in all configs with string values. #200
• Improve /compact UI in chat after running, cleaning chat and showing the new summary.
• Better config values dynamic string parse:
  • Support ${classapath:path/to/eca/classpath/file} in dynamic string parse.
  • Support ${netrc:api.foo.com} in dynamic string parse to parse keys. #200
  • Support default env values in ${env:MY_ENV:default-value}.
  • Support for ECA_CONFIG and custom config file.
• Deprecate configs:
  • systemPromptFile in favor of systemPrompt using ${file:...} or ${classpath:...}
  • urlEnv in favor of url using ${env:...}
  • keyEnv in favor of key using ${env:...}
  • keyRc in favor of key using ${netrc:...}
  • compactPromptFile in favor of compactPrompt using ${classpath:...}
• Fix ${netrc:...} to consider :netrcFile config.
• Fix ${netrc:...} to consider :netrcFile config properly.
• Enhanced hooks documentation with new types (sessionStart, sessionEnd, chatStart, chatEnd), JSON input/output schemas, execution options (timeout)
• Fix custom tools to support argument numbers.
• Improve read_file summary to mention offset being read.
• Enhanced hooks documentation with new types (sessionStart, sessionEnd, chatStart, chatEnd), JSON input/output schemas, execution options (timeout)
• Support rollback only messages, tool call changes or both in chat/rollback.
• Fix backwards compatibility for chat rollback.
• Support providers <provider> httpClient version config, allowing to use http-1.1 for some providers like lmstudio. #229
• Support openai/gpt-5.2 and github-copilot/gpt-5.2 by default.
• Improve agent behavior prompt to mention usage of editor_diagnostics tool. #230
• Use selmer syntax for prompt templates.
• Support Google Gemini thought signatures.
• Support gemini-3-pro-preview and gemini-3-flash-preview models in Google and Copilot providers.
• Fix deepseek reasoning with openai-chat API #228
• Support ~ in dynamic string parser.
• Support removing nullable values from LLM request body if the value in extraPayload is null. #232
• Improve read-file summary to show final range properly.
• Improve model capabilities for providers which model name has slash: my-provider/anthropic/my-model
• Fix openai-chat tool call + support for Mistral API #233
• Skip missing/unreadable @file references when building context
• Fix regression: /compact not working for some models. Related to #240

clojure-lsp

We finally support vertical alignment in clojure-lsp format via cljfmt, one of the most requested features!
I started a sequence of lots of outdated bumps which fixed some issues and intend to finish on the next release as some break tests and some existing features. Also, we had some new features like squint projects support!

2025.11.28-12.47.43

• New keywords completion inside namespaced maps. #2113
• Pass current namespace aliases to cljfmt when range-formatting. #2129
• bump clj-kondo to 2025.10.24-20251120.193408-8 improving performance, fixing false-positives and supporting java inner classes.
• Bump cljfmt to 0.15.5 - adding support for vertical alignment.
• Support squint projects when having squint.edn. #2158
• Support find definition of java inner classes (Foo$Bar). #2157
• Bump babashka/fs to 0.5.28.
• Bump opentelemetry to 1.51.0.
  

Michiel Borkent

2025 Annual Funding Report 6. Published January 6, 2026.

In this post I’ll give updates about open source I worked on during November and December 2025.

To see previous OSS updates, go here.

Sponsors

I’d like to thank all the sponsors and contributors that make this work possible. Without you, the below projects would not be as mature or wouldn’t exist or be maintained at all! So a sincere thank you to everyone who contributes to the sustainability of these projects.

Current top tier sponsors:

• Clojurists Together
• Roam Research
• Nextjournal
• Nubank

Open the details section for more info about sponsoring.

Updates

Clojure Conj 2025

Last November I had the honor and pleasure to visit the Clojure Conj 2025. I met a host of wonderful and interesting long-time and new Clojurians, many that I’ve known online for a long time and now met for the first time. It was especially exciting to finally meet Rich Hickey and talk to him during a meeting about Clojure dialects and Clojure tooling. The talk that I gave there: “Making tools developers actually use” will come online soon.

(From left to right: Steven Lombardi, Eric Dallo, Rich Hickey, Peter Strömberg, Michiel Borkent, Burin Choomnuan, and Arthur Fücher).

Babashka conf and Dutch Clojure Days 2026

In 2026 I’m organizing Babashka Conf 2026. It will be an afternoon event (13:00-17:00) hosted in the Forum hall of the beautiful public library of Amsterdam. More information here. Get your ticket via Meetup.com (currently there’s a waiting list, but more places will come available once speakers are confirmed). CfP will open mid January. The day after babashka conf, Dutch Clojure Days 2026 will be happening. It’s not too late to get your talk proposal in. More info here.

Clojurists Together: long term funding

I’m happy to announce that I’m among the 5 developers that were granted Long term support for 2026. Thanks to all who voted! Read the announcement here.

Projects

Here are updates about the projects/libraries I’ve worked on in the last two months in detail.

• babashka: native, fast starting Clojure interpreter for scripting.

  • Bump process to 0.6.25
  • Bump deps.clj
  • Fix #1901: add java.security.DigestOutputStream
  • Redefining namespace with ns should override metadata
  • Bump nextjournal.markdown to 0.7.222
  • Bump edamame to 1.5.37
  • Fix #1899: with-meta followed by dissoc on records no longer works
  • Bump fs to 0.5.30
  • Bump nextjournal.markdown to 0.7.213
  • Fix #1882: support for reifying java.time.temporal.TemporalField (@EvenMoreIrrelevance)
  • Bump Selmer to 1.12.65
  • SCI: sci.impl.Reflector was rewritten into Clojure
  • dissoc on record with non-record field should return map instead of record
  • Bump edamame to 1.5.35
  • Bump core.rrb-vector to 0.2.0
  • Migrate detecting of executable name for self-executing uberjar executable from ProcessHandle to to native image ProcessInfo to avoid sandbox errors
  • Bump cli to 0.8.67
  • Bump fs to 0.5.29
  • Bump nextjournal.markdown to 0.7.201

• SCI: Configurable Clojure/Script interpreter suitable for scripting

  • Add support for :refer-global and :require-global
  • Add println-str
  • Fix #997: Var is mistaken for local when used under the same name in a let body
  • Fix #1001: JS interop with reserved js keyword fails (regression of #987)
  • sci.impl.Reflector was rewritten into Clojure
  • Fix babashka/babashka#1886: Return a map when dissociating a record basis field.
  • Fix #1011: reset ns metadata when evaluating ns form multiple times
  • Fix for https://github.com/babashka/babashka/issues/1899
  • Fix #1010: add js-in in CLJS
  • Add array-seq

• clj-kondo: static analyzer and linter for Clojure code that sparks joy.
  

  • #2600: NEW linter: unused-excluded-var to warn on unused vars in :refer-clojure :exclude (@jramosg)
  • #2459: NEW linter: :destructured-or-always-evaluates to warn on s-expressions in :or defaults in map destructuring (@jramosg)
  • Add type checking support for sorted-map-by, sorted-set, and sorted-set-by functions (@jramosg)
  • Add new type array and type checking support for the next functions: to-array, alength, aget, aset and aclone (@jramosg)
  • Fix #2695: false positive :unquote-not-syntax-quoted in leiningen’s defproject
  • Leiningen’s defproject behavior can now be configured using leiningen.core.project/defproject
  • Fix #2699: fix false positive unresolved string var with extend-type on CLJS
  • Rename :refer-clojure-exclude-unresolved-var linter to unresolved-excluded-var for consistency
  • v2025.12.23
  • #2654: NEW linter: redundant-let-binding, defaults to :off (@tomdl89)
  • #2653: NEW linter: :unquote-not-syntax-quoted to warn on ~ and ~@ usage outside syntax-quote (`) (@jramosg)
  • #2613: NEW linter: :refer-clojure-exclude-unresolved-var to warn on non-existing vars in :refer-clojure :exclude (@jramosg)
  • #2668: Lint & syntax errors in let bindings and lint for trailing & (@tomdl89)
  • #2590: duplicate-key-in-assoc changed to duplicate-key-args, and now lints dissoc, assoc! and dissoc! too (@tomdl89)
  • #2651: resume linting after paren mismatches
  • clojure-lsp#2651: Fix inner class name for java-class-definitions.
  • clojure-lsp#2651: Include inner class java-class-definition analysis.
  • Bump babashka/fs
  • #2532: Disable :duplicate-require in require + :reload / :reload-all
  • #2432: Don’t warn for :redundant-fn-wrapper in case of inlined function
  • #2599: detect invalid arity for invoking collection as higher order function
  • #2661: Fix false positive :unexpected-recur when recur is used inside clojure.core.match/match (@jramosg)
  • #2617: Add types for repeatedly (@jramosg)
  • Add :ratio type support for numerator and denominator functions (@jramosg)
  • #2676: Report unresolved namespace for namespaced maps with unknown aliases (@jramosg)
  • #2683: data argument of ex-info may be nil since clojure 1.12
  • Bump built-in ClojureScript analysis info
  • Fix #2687: support new :refer-global and :require-global ns options in CLJS
  • Fix #2554: support inline configs in .cljc files

• edamame: configurable EDN and Clojure parser with location metadata and more
  Edamame: configurable EDN and Clojure parser with location metadata and more

  • Minor: leave out :edamame/read-cond-splicing when not splicing
  • Allow :read-cond function to override :edamame/read-cond-splicing value
  • The result from :read-cond with a function should be spliced. This behavior differs from :read-cond + :preserve which always returns a reader conditional object which cannot be spliced.
  • Support function for :features option to just select the first feature that occurs

• squint: CLJS syntax to JS compiler

  • Allow macro namespaces to load "node:fs", etc. to read config files for conditional compilation
  • Don’t emit IIFE for top-level let so you can write let over defn to capture values.
  • Fix js-yield and js-yield* in expression position
  • Implement some? as macro
  • Fix #758: volatile!, vswap!, vreset!
  • pr-str, prn etc now print EDN (with the idea that you can paste it back into your program)
  • new #js/Map reader that reads a JavaScript Map from a Clojure map (maps are printed like this with pr-str too)
  • Support passing keyword to mapv
  • #759: doseq can’t be used in expression context
  • Fix #753: optimize output of dotimes
  • alength as macro

• reagami: A minimal zero-deps Reagent-like for Squint and CLJS

  • Performance enhancements
  • treat innerHTML as a property rather than an attribute
  • Drop support for camelCased properties / (css) attributes
  • Fix :default-value in input range
  • Support data param in :on-render
  • Support default values for uncontrolled components
  • Fix child count mismatch
  • Fix re-rendering/patching of subroots
  • Add :on-render hook for mounting/updating/unmounting third part JS components

• NEW: parmezan: fixes unbalanced or unexpected parens or other delimiters in Clojure files

• CLI: Turn Clojure functions into CLIs!

  • #126: - value accidentally parsed as option, e.g. --file -
  • #124: Specifying exec fn that starts with hyphen is treated as option
  • Drop Clojure 1.9 support. Minimum Clojure version is now 1.10.3.

• clerk: Moldable Live Programming for Clojure

  • always analyze doc (but not deps) when no-cache is set (#786)
  • add option to disable inline formulas in markdown (#780)

• scittle: Execute Clojure(Script) directly from browser script tags via SCI

  • #114: Enable source maps (@jeroenvandijk)
  • #140: Enable customizing the nrepl websocket port (@PEZ)
  • Bump shadow-cljs and SCI

• Nextjournal Markdown

  • Add config option to avoid TeX formulas
  • API improvements for passing options

• cherry: Experimental ClojureScript to ES6 module compiler

  • Fix cherry compile CLI command not receiving file arguments
  • Bump shadow-cljs to 3.3.4
  • Fix #163: Add assert to macros (@willcohen)
  • Fix #165: Fix ClojureScript protocol dispatch functions (@willcohen)
  • Fix #167: Protocol dispatch functions inside IIFEs; bump squint accordingly
  • Fix #169: fix extend-type on Object
  • Fix #171: Add satisfies? macro (@willcohen)

• deps.clj: A faithful port of the clojure CLI bash script to Clojure

  • Released several versions catching up with the clojure CLI

• quickdoc: Quick and minimal API doc generation for Clojure

  • Fix extra newline in codeblock

• quickblog: light-weight static blog engine for Clojure and babashka

  • Add support for a blog contained within another website; see Serving an alternate content root in README. (@jmglov)
  • Upgrade babashka/http-server to 0.1.14
  • Fix :blog-image-alt option being ignored when using CLI (bb quickblog render)

• nbb: Scripting in Clojure on Node.js using SCI

  • #395: fix vim-fireplace infinite loop on nREPL session close.
  • Add ILookup and Cons
  • Add abs
  • nREPL: support "completions" op

• neil: A CLI to add common aliases and features to deps.edn-based projects.
  

  • neil.el - a hook that runs after finding a package (@agzam)
  • neil.el - adds a function for injecting a found package into current CIDER session (@agzam)
  • #245: neil.el - neil-executable-path now can be set to clj -M:neil
  • #251: Upgrade library deps-new to 0.10.3
  • #255: update maven search URL

• fs - File system utility library for Clojure

  • #154 reflect in directory check and docs that move never follows symbolic links (@lread)
  • #181 delete-tree now deletes broken symbolic link root (@lread)
  • #193 create-dirs now recognizes sym-linked dirs on JDK 11 (@lread)
  • #184: new check in copy-tree for copying to self too rigid
  • #165: zip now excludes zip-file from zip-file (@lread)
  • #167: add root fn which exposes Path getRoot (@lread)
  • #166: copy-tree now fails fast on attempt to copy parent to child (@lread)
  • #152: an empty-string path "" is now (typically) understood to be the current working directory (as per underlying JDK file APIs) (@lread)
  • #155: fs/with-temp-dir clj-kondo linting refinements (@lread)
  • #162: unixify no longer expands into absolute path on Windows (potentially BREAKING)
  • Add return type hint to read-all-bytes

• process: Clojure library for shelling out / spawning sub-processes

  • #181: support :discard or ProcessBuilder$Redirect as :out and :err options

Contributions to third party projects:

• ClojureScript
  • CLJS-3466: support qualified method in return position
  • CLJS-3468: :refer-global should not make unrenamed object available

Other projects

These are (some of the) other projects I’m involved with but little to no activity happened in the past month.

Oleksandr Yakushev

2025 Annual Funding Report 6. Published January 8, 2026.

Hello friends! Here’s my update on November-December 2025 Clojurists Together work. I’ve dedicated time in equal parts to improving clj-async-profiler and to working on nREPL/CIDER stack.

clj-async-profiler

I’ve released the first beta version of the quite disruptive 2.0.0 release of the profiler. The new version contains a whole new type of graph - a heatgraph - which incorporates time as a separate dimension, and allows constructing on-demand flamegraphs over arbitrary time slices. This new version also migrates from profiles as collapsed TXT files to the industry-standard JFR (Java Flight Recorder) profiles which incorporate more data and are more compact and efficient.

• Released 2.0.0-beta with support for JFR profiler data and heatgraphs.
• 45: Released version 1.7.0 for the older pre-2.0.0 branch of the profiler to restore compatibility with Linux kernerl 6.17.

nREPL

nREPL 1.6.0-alpha1 has been prepared which contains many updates that improve the stability of nREPL and simplify its codebase. nREPL is continually moving towards its original goal of being a simple reliable foundation for other tools to build upon.

• #403: Fix off by 1 error in CallbackBufferedOutputStream.
• #408: Refactor stdin middleware.
• #409: Refactor handler construction and middleware application.

Orchard

Plenty of work has gone into Orchard, mostly on the inspector and doc/Javadoc side. These changes will go into the next named CIDER release.

• #362: Info: don’t crash if symbol contains $ or /.
• #363: Inspector: show duplicates in analytics.
• #365: Inspector: don’t datafy vars.
• #367: Inspector: pretty-print arrays distinctively from vectors.
• #369: Inspector: group methods by declaring class.
• #370: Inspector: dedicated view for methods.
• #371: Inspector: analytics improvements.
• #368: Print: correctly render empty records.

cider-nrepl

Here I worked on the dependency footprint of the library. Cider-nrepl has many dependencies and a complicated solution to managing and shading them.

• #956: [ci] Include nrepl dependency into releases again.
• #959: Stop shading Compliment and clj-reload.

Virgil

Released Virgil 0.5.1.

• #45: Address reflection warnings.
• #46: Enable linting on CI.
  

Peter Taoussanis

2025 Annual Funding Report 6. Published January 9, 2026.

Hi everyone 👋

Another year behind us! I hope everyone had a peaceful break, and managed to get some quality time with family/friends/pets ^^

2025 was a productive year for my Clojure projects with >36 non-trivial library releases and one talk (“Effective Open Source Maintenance Maintenance”).

Some highlights included:

• Telemere v1 (now at v1.2.1) - Structured logs and telemetry for Clj+s
• Tempel v1 (now at v1.1) - Data security framework for Clj
• Trove v1 (now at v1.1) - Modern logging facade for Clj+s
• Tufte v3 - Simple performance monitoring library for Clj+s
• Sente v1.21 - Realtime web comms library for Clj+s
• Truss v2 (now at v2.3) - Micro toolkit for Clj+s errors
• http-kit v2.9b1 (now at beta3) - Fast HTTP client+server for Clj
• Carmine v3.5 - Redis client + message queue for Clj

My main unifying themes for the year were observability and documentation. I’m pretty happy now with the combo of Telemere, Trove, Tufte, and Truss. These work well together as a sort of opinionated observability suite for serious Clojure applications. And I think that together they offer a pretty compelling demonstration of some of the kinds of real-world advantages Clojure can offer people trying to get things done at scale.

As always, a very big and warm thank you to the many users and contributors that helped patiently test, give feedback, report bugs, and offer improvements over the year. The Clojure community has always been and continues to be a special one ❤️

Likewise a big thank you to the companies and folks (incl. Clojurists Together, Nubank, and other sponsors) that have helped support my OSS work financially! It’s been great being able to dedicate so much time to open source, and it’s something I feel very grateful to have been able to benefit from 🙏

Those closely following my releases may have noted that I was unusually quiet over Nov/Dec. tl;dr ended up with some unexpected Life stuff coming up that has required the bulk of my attention and energy. So a few releases I had planned for that period will need to wait until later (likely Q2 2026).

Relatedly, I should warn that I might need to deload a little in 2026. Will still be providing maintenance and support as usual, just not sure yet to what extent I’ll be able to contribute the usual amount of attention to substantial greenfield work.

I’m in Clojure for the long haul, and will continue to be present and as active as I’m able- things may just be a little bit more unpredictable on my side for the next few months as I see how next developments play out.

Best wishes to everyone for the new year, and much love to you all! 🫶

- Peter Taoussanis