Jordan Marr
@jordanmarr.bsky.social
Spreading the gospel of F#
https://github.com/JordanMarr
https://github.com/JordanMarr
Reposted by Jordan Marr
February 10, 2026 at 9:51 PM
FSharp.SystemCommandLine v2.1 provides a more declarative way to inject services alongside CLI arguments and options.
github.com/JordanMarr/F... #fsharp
github.com/JordanMarr/F... #fsharp
Release v2.1.0 · JordanMarr/FSharp.SystemCommandLine
✨ New: First‑class dependency injection with Input.inject
Input.inject now allows you to pass runtime dependencies (loggers, configuration, services, etc.) directly into your command actions as fir...
github.com
February 8, 2026 at 9:17 PM
FSharp.SystemCommandLine v2.1 provides a more declarative way to inject services alongside CLI arguments and options.
github.com/JordanMarr/F... #fsharp
github.com/JordanMarr/F... #fsharp
SqlHydra - v3.4 is out today. It is a rollup of the last two releases. Lots of nice, new features and some deprecated ones to help transition into an upcoming v4.0. #fsharp
github.com/JordanMarr/S...
github.com/JordanMarr/S...
Release SqlHydra v3.3 + v3.4 · JordanMarr/SqlHydra
An ergonomic release that modernizes how query contexts are created, improves left‑join projections, and introduces a more expressive join API. Fully backward‑compatible with 3.2, and forward-looki...
github.com
February 3, 2026 at 2:46 PM
SqlHydra - v3.4 is out today. It is a rollup of the last two releases. Lots of nice, new features and some deprecated ones to help transition into an upcoming v4.0. #fsharp
github.com/JordanMarr/S...
github.com/JordanMarr/S...
Big update for the Fable + Lit ecosystem!
✨ Fable.Lit.Dsl
✨ Fable.Lit.Dsl.Shoelace
✨ Fullstack template update (.NET 10 + Fable 5)
#fsharp #webcomponents #lit
github.com/JordanMarr/f...
✨ Fable.Lit.Dsl
✨ Fable.Lit.Dsl.Shoelace
✨ Fullstack template update (.NET 10 + Fable 5)
#fsharp #webcomponents #lit
github.com/JordanMarr/f...
GitHub - JordanMarr/fable-lit-fullstack-template: A SAFE-style template with Fable.Lit, Fable.Remoting and Giraffe
A SAFE-style template with Fable.Lit, Fable.Remoting and Giraffe - JordanMarr/fable-lit-fullstack-template
github.com
January 27, 2026 at 12:43 AM
Big update for the Fable + Lit ecosystem!
✨ Fable.Lit.Dsl
✨ Fable.Lit.Dsl.Shoelace
✨ Fullstack template update (.NET 10 + Fable 5)
#fsharp #webcomponents #lit
github.com/JordanMarr/f...
✨ Fable.Lit.Dsl
✨ Fable.Lit.Dsl.Shoelace
✨ Fullstack template update (.NET 10 + Fable 5)
#fsharp #webcomponents #lit
github.com/JordanMarr/f...
🚀 Agent.NET has evolved significantly since the alpha.1 announcement — alpha.2 and now alpha.3 bring proper MAF execution, symmetrical InProcess/Durable workflows, and a more cohesive workflow CE with ROP built in.
Full release history:
github.com/JordanMarr/A...
#fsharp #dotnet #aiagents
Full release history:
github.com/JordanMarr/A...
#fsharp #dotnet #aiagents
Releases · JordanMarr/Agent.NET
A composable AI agent framework for .NET. Contribute to JordanMarr/Agent.NET development by creating an account on GitHub.
github.com
January 21, 2026 at 4:46 PM
🚀 Agent.NET has evolved significantly since the alpha.1 announcement — alpha.2 and now alpha.3 bring proper MAF execution, symmetrical InProcess/Durable workflows, and a more cohesive workflow CE with ROP built in.
Full release history:
github.com/JordanMarr/A...
#fsharp #dotnet #aiagents
Full release history:
github.com/JordanMarr/A...
#fsharp #dotnet #aiagents
Reposted by Jordan Marr
It's kind of funny that due to AI/LLMs these days another metric to rate #programming languages on has become "token efficiency".
On the bright side - some of the beloved languages like #Clojure, #Ruby, #FSharp and #OCaml fared pretty well due to their expressive and compact syntax.
On the bright side - some of the beloved languages like #Clojure, #Ruby, #FSharp and #OCaml fared pretty well due to their expressive and compact syntax.
January 16, 2026 at 9:29 AM
It's kind of funny that due to AI/LLMs these days another metric to rate #programming languages on has become "token efficiency".
On the bright side - some of the beloved languages like #Clojure, #Ruby, #FSharp and #OCaml fared pretty well due to their expressive and compact syntax.
On the bright side - some of the beloved languages like #Clojure, #Ruby, #FSharp and #OCaml fared pretty well due to their expressive and compact syntax.
A beautiful F# library for building AI agents on .NET:
• Quotation-based tool discovery
• Pipeline-style agent composition
• Computation expressions for workflows
• Railway-oriented error handling
F# deserves a place in the agent era — and this is my contribution.
#fsharp #dotnet
• Quotation-based tool discovery
• Pipeline-style agent composition
• Computation expressions for workflows
• Railway-oriented error handling
F# deserves a place in the agent era — and this is my contribution.
#fsharp #dotnet
January 5, 2026 at 6:11 AM
SqlHydra v3.2 big release today that builds on yesterday's release! Now includes DB-specific functions for all 5 supported DBs, custom functions, and adds .NET 10 support.
Samples included in the release notes.
github.com/JordanMarr/S... #fsharp
Samples included in the release notes.
github.com/JordanMarr/S... #fsharp
Release SqlHydra v3.2.0 · JordanMarr/SqlHydra
SqlHydra.Query
Built-in SQL Functions
Use SQL functions directly in your queries with full type safety! Each database provider includes a SqlFn type with common functions.
open SqlHydra.Query
open ...
github.com
December 23, 2025 at 7:13 PM
SqlHydra v3.2 big release today that builds on yesterday's release! Now includes DB-specific functions for all 5 supported DBs, custom functions, and adds .NET 10 support.
Samples included in the release notes.
github.com/JordanMarr/S... #fsharp
Samples included in the release notes.
github.com/JordanMarr/S... #fsharp
My FS Advent post for Dec 22, 2025. 🎄✨☕
Thanks to @sergeytihon.com for keeping the F# community buzzing along year after year!
jordanmarr.github.io/fsharp/cloud... #FsAdvent #fsharp
Thanks to @sergeytihon.com for keeping the F# community buzzing along year after year!
jordanmarr.github.io/fsharp/cloud... #FsAdvent #fsharp
Create a Cloudflare Worker in .NET?!
A blog about F#, Fable, and functional programming in .NET
jordanmarr.github.io
December 22, 2025 at 5:38 PM
My FS Advent post for Dec 22, 2025. 🎄✨☕
Thanks to @sergeytihon.com for keeping the F# community buzzing along year after year!
jordanmarr.github.io/fsharp/cloud... #FsAdvent #fsharp
Thanks to @sergeytihon.com for keeping the F# community buzzing along year after year!
jordanmarr.github.io/fsharp/cloud... #FsAdvent #fsharp
Reposted by Jordan Marr
December 22, 2025 at 3:46 PM
t really bothers me having to type in the full tuple return type and predicate function type in C#.
To each their own but #fsharp type inference just makes me happy.
To each their own but #fsharp type inference just makes me happy.
December 10, 2025 at 12:13 AM
t really bothers me having to type in the full tuple return type and predicate function type in C#.
To each their own but #fsharp type inference just makes me happy.
To each their own but #fsharp type inference just makes me happy.
Reposted by Jordan Marr
Fable 4 and Fable 5, both got a new release to make them work with .NET 10 🎉 #fsharp #fablecompiler
November 25, 2025 at 10:19 PM
Fable 4 and Fable 5, both got a new release to make them work with .NET 10 🎉 #fsharp #fablecompiler
Reposted by Jordan Marr
Fable 5.0.0-alpha.15 has been released.
Lot of improvements have been made for TS and Python target.
It also include fixes for Nullable Reference Types hopefully making us closer to an official stable release. Fable 5 is already used in production by some.
#fsharp #fablecompiler
Lot of improvements have been made for TS and Python target.
It also include fixes for Nullable Reference Types hopefully making us closer to an official stable release. Fable 5 is already used in production by some.
#fsharp #fablecompiler
November 19, 2025 at 11:07 AM
Fable 5.0.0-alpha.15 has been released.
Lot of improvements have been made for TS and Python target.
It also include fixes for Nullable Reference Types hopefully making us closer to an official stable release. Fable 5 is already used in production by some.
#fsharp #fablecompiler
Lot of improvements have been made for TS and Python target.
It also include fixes for Nullable Reference Types hopefully making us closer to an official stable release. Fable 5 is already used in production by some.
#fsharp #fablecompiler
Reposted by Jordan Marr
F# 10 makes it possible to use let! .. and! to await two tasks in parallel. This brings back some memories!
November 14, 2025 at 12:13 AM
F# 10 makes it possible to use let! .. and! to await two tasks in parallel. This brings back some memories!
FSharp.SystemCommandLine v2.0 is released, following System.CommandLine out of beta! #fsharp
github.com/JordanMarr/F...
github.com/JordanMarr/F...
GitHub - JordanMarr/FSharp.SystemCommandLine
Contribute to JordanMarr/FSharp.SystemCommandLine development by creating an account on GitHub.
github.com
November 14, 2025 at 10:54 PM
FSharp.SystemCommandLine v2.0 is released, following System.CommandLine out of beta! #fsharp
github.com/JordanMarr/F...
github.com/JordanMarr/F...
SqlBulkTools.FSharp v1.0.0 is released!
github.com/JordanMarr/S...
github.com/JordanMarr/S...
Release v1.0.0 · JordanMarr/SqlBulkTools.FSharp
Changes
SqlBulkTools.FSharp v1.0.0 now uses Microsoft.Data.SqlClient instead of System.Data.SqlClient.
SqlBulkTools.FSharp now relies on a the "fretje.SqlBulkTools" fork since the original package...
github.com
September 28, 2025 at 4:07 PM
SqlBulkTools.FSharp v1.0.0 is released!
github.com/JordanMarr/S...
github.com/JordanMarr/S...
FSharp.SystemComandLine v2.0.0-beta7 is released!
This adapts to API changes in the new System.CommandLine v2.0.0-beta7.
#fsharp
github.com/JordanMarr/F...
This adapts to API changes in the new System.CommandLine v2.0.0-beta7.
#fsharp
github.com/JordanMarr/F...
August 17, 2025 at 3:38 PM
FSharp.SystemComandLine v2.0.0-beta7 is released!
This adapts to API changes in the new System.CommandLine v2.0.0-beta7.
#fsharp
github.com/JordanMarr/F...
This adapts to API changes in the new System.CommandLine v2.0.0-beta7.
#fsharp
github.com/JordanMarr/F...
I just refactored a bunch of tests with large, inline JSON strings to files using the awesome "EasyBuild.FileSystemProvider" type provider by @mangelmaxime.bsky.social. #fsharp
(The JSON strings were using up mah tokens!)
github.com/easybuild-or...
(The JSON strings were using up mah tokens!)
github.com/easybuild-or...
July 15, 2025 at 9:20 PM
I just refactored a bunch of tests with large, inline JSON strings to files using the awesome "EasyBuild.FileSystemProvider" type provider by @mangelmaxime.bsky.social. #fsharp
(The JSON strings were using up mah tokens!)
github.com/easybuild-or...
(The JSON strings were using up mah tokens!)
github.com/easybuild-or...
No matter how many times I do it, I can never remember the sequence of git commands and cryptic arguments needed to sync my commits to an upstream repository over time. This has probably become my most repeated AI chat request.
July 14, 2025 at 7:13 PM
No matter how many times I do it, I can never remember the sequence of git commands and cryptic arguments needed to sync my commits to an upstream repository over time. This has probably become my most repeated AI chat request.
Reposted by Jordan Marr
Look ma' no esbuild, no cdn, and somewhat editor tooling support! (you wouldn't believe how much the tooling "just works" when your dependencies are stored in a "node_modules" directory)
#dotnet #fsharp #webdev #spa #importmaps
#dotnet #fsharp #webdev #spa #importmaps
July 14, 2025 at 4:23 AM
Look ma' no esbuild, no cdn, and somewhat editor tooling support! (you wouldn't believe how much the tooling "just works" when your dependencies are stored in a "node_modules" directory)
#dotnet #fsharp #webdev #spa #importmaps
#dotnet #fsharp #webdev #spa #importmaps
The new `tryParse` fn in FSharp.SystemCommandLine makes it easy to parse any input type using the F# Result type for built-in validation. Perfect for parsing discriminated unions, or... anything. #fsharp
July 13, 2025 at 3:42 AM
The new `tryParse` fn in FSharp.SystemCommandLine makes it easy to parse any input type using the F# Result type for built-in validation. Perfect for parsing discriminated unions, or... anything. #fsharp