📝 New article: Designing a C#-friendly Result type (not just an F# port) The missing union types were the easy part. The real work: implicit conversions, Try-pattern, LINQ query syntax as a result {} block. romain-deneau.hashnode.dev/designing-a-... #csharp #fsharp

Designing a C#-friendly Result type (not just an F# port)

How our mostly-F# team designed a Result type in C# — the missing union types were the easy part; the real work was a C#-idiomatic API.

romain-deneau.hashnode.dev

Major update to the article: • invalid states now unrepresentable in the domain model • a 3rd builder: a CPS continuation monad for if … then return with no else — thanks @borar.bsky.social #fsharp #dotnet #fp

@romain-deneau.bsky.social · 2mo ago

C# developers use early return to avoid nesting. #fsharp doesn't have that — so guard logic keeps adding indentation levels. 📝 New article: how a tiny custom computation {} CE brings early exits back, without giving up functional style. 🔗 romain-deneau.hashnode.dev/a-real-world...

C# developers use early return to avoid nesting. #fsharp doesn't have that — so guard logic keeps adding indentation levels. 📝 New article: how a tiny custom computation {} CE brings early exits back, without giving up functional style. 🔗 romain-deneau.hashnode.dev/a-real-world...

Most languages let you pattern-match on what data IS. #FSharp lets you pattern-match on what data MEANS. Active Patterns reshape data so you can match on business concepts instead of raw structure. And they compose. 🔗 rdeneau.gitbook.io/safe-clean-a... #DotNet #PatternMatching #FuncProg

What if your pattern matching could call functions? | Safe Clean Architecture

rdeneau.gitbook.io

What if your compiler enforced your architecture rules? Why choose between Clean, Hexagonal, Vertical Slices, Screaming? Safe Clean Architecture combines all 5 & turns #fsharp file declaration order into compile-enforced layer boundaries #dotnet #CleanArchitecture www.linkedin.com/pulse/what-y...

What if your compiler could enforce your architecture rules?

Most architecture discussions focus on picking one model — Clean Architecture or Hexagonal or Vertical Slices. In practice, each brings a distinct perspective, and they're more complementary than comp...

linkedin.com

In the #TypeScript world, #TanStackQuery has set the standard: no async in components, declarative loading states, and clean error handling. The #FSharp #SAFEStack reaches the same ergonomics — but the compiler enforces correctness across the entire stack. No URL typos. No serialization mismatches.

What if Your API Calls Were Type-Safe, Auth-Aware, and Translation-Ready — All at Once?

Modern front-end apps juggle three concerns on every server call: fetching data, checking permissions, and loading translations. Most stacks solve each one separately — a fetch library here, an auth m...

linkedin.com

Mea culpa: Free Monads in F# can support parallelism. We just need a different implementation! New GitBook page comparing Program pattern variations for domain workflows — Free Monad vs Tagless Final, #FSharp & #CSharp. Featuring @azariah.bsky.social work 🙏 👉 rdeneau.gitbook.io/safe-clean-a...

Addendum: Pattern Variations | Safe Clean Architecture

rdeneau.gitbook.io

@romain-deneau.bsky.social · 5mo ago

Discovering a cornerstone of Safe Clean Architecture: Domain Workflows (repost) 📸 Here is a screenshot of the article on LinkedIn, for those who prefer not to use that platform #fsharp #dotnet

Guess how many ways to manage dependencies are used in the Safe Clean Architecture? #CleanArchitecture #FSharp #DotNet #DependencyInjection #FunctionalProgramming #SoftwareArchitecture www.linkedin.com/pulse/9-ways...

9 Ways to Manage Dependencies in One Architecture

The Safe Clean Architecture is a full-stack F# project that combines Clean Architecture, DDD, and the SAFE stack. While documenting it, I realized it uses 9 distinct dependency management techniques—n...

linkedin.com

Discovering a cornerstone of Safe Clean Architecture: Domain Workflows (repost) 📸 Here is a screenshot of the article on LinkedIn, for those who prefer not to use that platform #fsharp #dotnet

@romain-deneau.bsky.social · 5mo ago

Discovering a cornerstone of Safe Clean Architecture: Domain Workflows. www.linkedin.com/pulse/functi...

Discovering a cornerstone of Safe Clean Architecture: Domain Workflows. www.linkedin.com/pulse/functi...

Functional Core, Imperative Shell — and what happens when you push it further with F#

Back in 2020, I discovered a powerful architectural idea: separate pure business logic from side effects. Thomas Pierrain wrote about Functional Core, Imperative Shell in the context of hexagonal arch...

linkedin.com

@romain-deneau.bsky.social · 5mo ago

📖 After four months of work, the book “Safe Clean Architecture” is now complete 🎉 🔗 Check it out online. rdeneau.gitbook.io/safe-clean-a... #fsharp #free #e-book

📖 After four months of work, the book “Safe Clean Architecture” is now complete 🎉 🔗 Check it out online. rdeneau.gitbook.io/safe-clean-a... #fsharp #free #e-book

@romain-deneau.bsky.social · 8mo ago

📢 Announcing the writing of the book “Safe Clean Architecture”, available for free on GitBook to the #dotnet and #fsharp communities, and coming with a demo app already up and running: Shopfoo. 🙏 Thanks to @sergeytihon.com for the #fsadvent calendar. 🔗 rdeneau.gitbook.io/safe-clean-a...

📢 Announcing the writing of the book “Safe Clean Architecture”, available for free on GitBook to the #dotnet and #fsharp communities, and coming with a demo app already up and running: Shopfoo. 🙏 Thanks to @sergeytihon.com for the #fsadvent calendar. 🔗 rdeneau.gitbook.io/safe-clean-a...

Welcome | Safe Clean Architecture

rdeneau.gitbook.io

Blog post: Tips for unit testing #fsharp Fable apps using .NET: jordanmarr.github.io/fsharp/unit-...