Pawel Gerr

Claude Code now supports an `if` field in hooks It uses permission rule syntax to filter when a hook runs, which is useful when you want a hook on some bash commands but not every single one!

I wanted to share a bunch of my favorite hidden and under-utilized features in Claude Code. I'll focus on the ones I use the most. Here goes.

What happens when your PostgreSQL system hits its limits? This guide shows how to break it on purpose—before production does: hackernoon.com/how-to-break-y…

New on the Anthropic Engineering Blog: How we use a multi-agent harness to push Claude further in frontend design and long-running autonomous software engineering. Read more: anthropic.com/engineering/ha…

New on the Engineering Blog: How we designed Claude Code auto mode. Many Claude Code users let Claude work without permission prompts. Auto mode is a safer middle ground: we built and tested classifiers that make approval decisions instead. Read more: anthropic.com/engineering/cl…

Introducing dotnet/skills, a repository that hosts a set of agent skills for .NET developers from the team who is building the platform itself. devblogs.microsoft.com/dotnet/extend-…

NET AI Community Standup - MCP C# SDK v1.0 is Here! x.com/i/broadcasts/1…

WebGPU is INSANE! 🤯 Here's a 24B parameter model running locally in a web browser, at a blazing ~50 tokens/second on my M4 Max. ⚡️ It's the largest model we've ever run with Transformers.js... and we're not stopping here. Big announcement soon.

New in Claude Code: auto mode. Instead of approving every file write and bash command, or skipping permissions entirely, auto mode lets Claude make permission decisions on your behalf. Safeguards check each action before it runs.

Holy shit… someone just made Claude instances talk to each other. Not APIs. Not agents. Not orchestrators. Just multiple Claude Code sessions… messaging each other like coworkers. It’s called claude-peers — and it turns one Claude into a team. Here’s what’s happening: Run 5 Claude Code sessions across different projects Each one auto-discovers the others They send messages instantly Ask questions Share context Coordinate work Your AI tools literally collaborate. Example: Claude A (poker-engine): "what files are you editing?" Claude B (frontend): "working on auth.ts + UI state" Claude A: "ok I'll avoid touching auth logic" No conflicts. No manual coordination. Just AI syncing itself. Under the hood: • Local broker daemon (localhost) • SQLite peer registry • MCP servers per session • Instant channel push messaging • Auto peer discovery • Cross-project communication Everything runs locally. No cloud. No latency. What it unlocks: • Multi-agent coding without frameworks • One Claude writes backend, another frontend • One debugs while another refactors • Research Claude feeds builder Claude • Large projects split across AI workers This is basically: "spawn 5 Claudes and let them coordinate themselves" Even crazier: Each instance auto-summarizes what it's doing Other Claudes can see: • working directory • git repo • current task • active files They know what the others are working on. Commands: • list_peers → find all Claude sessions • send_message → talk to another Claude • set_summary → describe your task • check_messages → manual fallback So you can literally say: "message peer 3: what are you working on?" …and it responds instantly. No orchestration layer. No agent framework. Just Claudes… talking. This is the cleanest multi-agent system I've seen. We're moving from: 1 AI assistant → to AI teams that coordinate themselves. And it's all running on your machine. Wild.

GitHub SqLite #dotnet framework support issue: github.com/dotnet/efcore/…

Microsoft.Data.SqlClient 7.0 Is Here: A Leaner, More Modular Driver for SQL Server #dotnet #sqlserver techcommunity.microsoft.com/blog/sqlserver…

.NET 11 Preview 2 is here: ⚙️ Faster runtime + async V2 📦 Smarter libs (Matrix4x4, Tar picks, Json type info) 🌐 ASP.NET Core: OTel + OpenAPI 3.2 📱 MAUI perf wins 🗄️ EF Core: DiskANN + JSON_CONTAINS 🐳 Smaller SDK images Learn more: ift.tt/sxBIPpb

New in Claude Code: Code Review. A team of agents runs a deep review on every PR. We built it for ourselves first. Code output per Anthropic engineer is up 200% this year and reviews were the bottleneck Personally, I’ve been using it for a few weeks and have found it catches many real bugs that I would not have noticed otherwise

.NET is at a slight disadvantage with coding agents since the distirbution mechanism is binaries (dlls). I've been experimenting with a decompile skill using the ilspy command line tool. You can install it here: github.com/davidfowl/dotn… #dotnet #agents

Implementing Agent-to-Agent Protocol in .NET - techcommunity.microsoft.com/blog/azuredevc…

Anthropic is acquiring @bunjavascript to further accelerate Claude Code’s growth. We're delighted that Bun—which has dramatically improved the JavaScript and TypeScript developer experience—is joining us to make Claude Code even better. Read more: anthropic.com/news/anthropic…

Big news for API developers! The latest OpenAPI .NET updates bring improved tooling, enhanced compatibility, and new features to streamline your API workflows. Whether you’re building or consuming APIs, these updates (cont) msft.it/l/6019tjzZ3

Version 10.0 of #npgsql and the #efcore provider for PostgreSQL are now out and available on nuget.org. Thanks for the wait and it's heart-warming to see so many people patiently (and sometimes not so patiently ;)) waiting for the release!

Just published: "Discriminated Unions in .NET: Integration with Frameworks and Libraries" by @PawelGerr! Covers framework integration, JSON serialization, model binding, EF Core & more. Read now: lnk.thinktecture.cloud/DU_4 #dotnet #csharp #DiscriminatedUnions #EntityFramework #ASPNetCore #devcommunity