Who contributed to .NET on May 23, 2026?

3 developers shipped this update, including Youssef1313, T-Gro, and dependabot[bot].

What were the notable .NET updates?

Let JsonException bubble through problem details in minimal APIs, Switch CCR opt-out to check PR body for 'SKIP CCR REVIEW', and Bump system versions.

@dotnet

The .NET runtime, ASP.NET, and the C# tooling

github ↗

Pick a date

Topics: .NET Full archive →

The Wire · Showcase

ASP.NET Core fixes JSON exception handling in minimal APIs

By RepoJournal · Filed 06:05 UTC on May 23, 2026 · About .NET

3 people shipped this

T-Gro @T-Gro 2 cited

Youssef1313 @Youssef1313 1 cited

dependabot[bot] @dependabot[bot] 1 cited

JsonException now propagates correctly through problem details middleware instead of being swallowed, fixing a critical edge case in minimal API error handling.

The ASP.NET Core team shipped a fix [1] that lets JsonException bubble through problem details in minimal APIs, addressing a gap where malformed JSON payloads were being masked by the middleware. This one matters if you're relying on precise error signals in production. Over in F# land, the team is tightening up code review automation: they've moved CCR opt-out detection from labels to PR body comments [2], a pragmatic fix since the Copilot agent doesn't have access to label context anyway. They're also bumping the .NET SDK from 10.0.202 to 10.0.204 [3], so if you're building F# on CI, sync your images. The ASP.NET Core signing layer picked up a small but important change [4] adding catalog signing for .cat files covering customer-modifiable JS templates, keeping compliance aligned across the pipeline. Dependency updates across both repos are routine: gh-aw-actions bumped from 0.74.9 to 0.75.0 [5] and some stale version comments in GitHub Actions workflows got corrected [6] to match what Dependabot actually updated.

Action items

→ Review and test JSON error handling in minimal APIs if you use custom problem details middleware dotnet/aspnetcore [plan]
→ Sync F# builds to .NET SDK 10.0.204 in CI/CD dotnet/fsharp [plan]
→ Update any CCR opt-out instructions in F# PRs to use 'SKIP CCR REVIEW' in PR body instead of labels dotnet/fsharp [monitor]

References

[1] Let JsonException bubble through problem details in minimal APIs ↗ dotnet/aspnetcore
[2] Switch CCR opt-out to check PR body for 'SKIP CCR REVIEW' ↗ dotnet/fsharp
[3] Bump system versions ↗ dotnet/fsharp
[4] Add .cat catalog signing and update .js exclusion comment (#66443) dotnet/aspnetcore
[5] [main] (deps): Bump github/gh-aw-actions from 0.74.9 to 0.75.0 ↗ dotnet/aspnetcore
[6] Fix outdated version comments in GitHub Action workflows (#66776) dotnet/aspnetcore

Quick answers

What shipped in .NET on May 23, 2026?: JsonException now propagates correctly through problem details middleware instead of being swallowed, fixing a critical edge case in minimal API error handling. In total, 6 commits and 9 pull requests landed.
Who contributed to .NET on May 23, 2026?: 3 developers shipped this update, including Youssef1313, T-Gro, and dependabot[bot].
What were the notable .NET updates?: Let JsonException bubble through problem details in minimal APIs, Switch CCR opt-out to check PR body for 'SKIP CCR REVIEW', and Bump system versions.

RUNTIME FIXES KERBEROS FALLBACK ON UNIX, APPHOST CONVERTS TO C

The managed SPNEGO implementation now falls back to NTLM when Kerberos credentials go missing on Linux, closing a critical auth gap that broke enterprise deployments [ref:1].

dotnet 120 shipped 1-min read

@dotnet 1 day ago

MACIOS DOCS OVERHAUL SPANS 31 TYPES, ASPNETCORE VALIDATION MOVES TO SOURCE GENERATION

Rolf Bjarne shipped 31 types with proper XML documentation across macios while aspnetcore refactors validation classes out of the public API entirely.

dotnet 25 shipped 1-min read

@dotnet 2 days ago

SQLCLIENT KILLS PLATFORM-SPECIFIC BUILDS, ASPNETCORE HARDENS SIGNALR

SqlClient unified its Windows and Unix code paths without restructuring the NuGet package, collapsing build complexity across the entire SNI layer.

dotnet 97 shipped 2-min read

@dotnet 3 days ago

COMPLEX NUMBERS NOW IEEE 754 COMPLIANT, SKILLS EVALS GO VALLY-ONLY, UNSAFE EVOLVES

Complex<T> just shipped conformance to C23 Annex G special values, dotnet/skills completed its migration to the Vally eval harness, and the language is tightening unsafe semantics ahead of C# 13.

dotnet 141 shipped 2-min read

Elsewhere on the wire

AI Agents about 9 hours ago

CLAUDE OPUS 5 LANDS ACROSS THE STACK

The newest Anthropic model is now live in langchain, Cline, and llama-index, with native support for extended reasoning and 1M context windows.

ai-agents 28 shipped 1-min read

Local LLMs about 9 hours ago

OLLAMA LANDS LAGUNA SUPPORT AND CRUSHES MEMORY LEAKS WHILE SGLANG HITS V0.5.16 WITH CONFIDENCE-DRIVEN SPECULATIVE DECODING

Ollama shipped three critical performance and reliability fixes for Metal residency and concurrent access patterns, while SGL-Lang released 0.5.16 with a new speculative algorithm hitting 383.7 tok/s on DeepSeek-V4.