Nikesh Pandya

Software developer who likes building things 👨‍💻
Currently exploring AI, automation & markets.
Sharing what I build and learn along the way.
📍 India

[Claude @claudeai]

Sonnet 5.5 improves on Sonnet 5 across benchmarks, in some cases dramatically.

It’s a faster, lower-cost complement to Claude Opus 5.5, strongest at well-scoped everyday tasks, fixing bugs, and creating polished documents, slides, and spreadsheets.

[Nikesh Pandya @ImNpandya]

@cleeeeeeeeement SEO

[Nikesh Pandya @ImNpandya]

Runnable demo (bug, validation error, fix): https://t.co/c7OWZUUZPW

[Nikesh Pandya @ImNpandya]

Day 1/15 · .NET Interview Prep

"What happens when you inject a Scoped service into a Singleton?"

Most people answer "it throws". In Production it usually doesn't.

.NET Core turns on ValidateScopes and ValidateOnBuild only in the Development environment. Everywhere else they are off by default, so the app starts, the tests pass, and the bug ships.

The bug has a name: captive dependency. The singleton is created once and keeps the scoped object for the life of the app. Your "one per request" service is now shared by every request.

With a DbContext, concurrent requests hit an object that isn't thread-safe. With a tenant context in a multi-tenant SaaS, you are close to showing one customer another customer's data.

The fix:
- Make the consumer Scoped, or inject IServiceScopeFactory and create a scope per unit of work
- For EF Core, use IDbContextFactory
- Turn on ValidateOnBuild in CI so it can't sneak back in

Senior bonus: a Transient injected into a Singleton is captured too. The rule is simple: a service should only depend on services that live as long as it does, or longer.

Tomorrow, Day 2: why .Result can deadlock, and when ConfigureAwait(false) actually matters.

#dotnet #csharp

[Nikesh Pandya @ImNpandya]

Free traffic thread. 🔥

Drop what you're building.

[Nikesh Pandya @ImNpandya]

Claude Opus 5.5 just dropped — and this is the one that actually matters for builders.

Fable-level on most work.
~40% cheaper than Opus 5.
$4/$20 per MTok. Cache reads at $0.20.
That’s the agent tax cut.
Overnight multi-repo jobs stay on task. Writing is clearer. Coding benchmarks look strong.

And this is just the first of the 5.5 family.

Sonnet and Haiku are still coming.

What are you moving to Opus 5.5 first?

#ClaudeAI #Opus55 #ClaudeCode #AI

[Nikesh Pandya @ImNpandya]

.NET 8 has 50 days left.

November 10, 2026. .NET 8 LTS and .NET 9 STS both stop getting security patches.

𝗧𝗵𝗲 𝗰𝗮𝗹𝗹: Skip .NET 11 (STS, 2-year support). Go 8 → 10 LTS instead. You don't have time to chase a major every year.

𝗨𝗽𝗴𝗿𝗮𝗱𝗲 𝗰𝗵𝗲𝗰𝗸𝗹𝗶𝘀𝘁:

  • TargetFramework bump
  • EF Core + Npgsql + SqlClient together
  • Run breaking changes against integration tests
  • Update Azure App Service runtime
  • Update CI build images

𝗥𝗲𝗮𝗹 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻: Which version of .NET are you using right now? Are you already planning the upgrade?

#dotnet #csharp #aspnetcore #softwaredevelopment #softwareengineering #saas #microsoft

[Claude @claudeai]

Projects now run from one conversation, starting in Claude Code. You describe what needs doing, and Claude directs parallel threads that keep working after you close your laptop.

In beta today for select Pro and Max users in cloud sessions; coming to all Claude users soon.

[Nikesh Pandya @ImNpandya]

AI code review can now run builds and tests. Great progress.

But a passing test can still confirm the wrong assumption.

Month-end dates, duplicate retries, permissions: the hardest bugs often start with a question nobody asked.

What edge case taught you that lesson?

[Nikesh Pandya @ImNpandya]

@Joi2James https://t.co/BuFd8YEG29

[Nikesh Pandya @ImNpandya]

𝗖# 𝟭𝟱 𝗶𝘀 𝗯𝗿𝗶𝗻𝗴𝗶𝗻𝗴 𝗮 𝗳𝗲𝘄 𝗰𝗵𝗮𝗻𝗴𝗲𝘀 𝘁𝗵𝗮𝘁 𝗮𝗿𝗲 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝘄𝗼𝗿𝘁𝗵 𝗽𝗮𝘆𝗶𝗻𝗴 𝗮𝘁𝘁𝗲𝗻𝘁𝗶𝗼𝗻 𝘁𝗼.

The one that stands out most to me is 𝘂𝗻𝗶𝗼𝗻 𝘁𝘆𝗽𝗲𝘀.

For years, .NET developers have used custom `Result<T>` patterns, third-party libraries, or exceptions to represent multiple possible outcomes from a method.

With union types, C# can model those possibilities directly, and the compiler can help make sure every case is handled.

That should make code around validation, API responses, business rules, and error handling much cleaner.

C# 15 also includes improvements such as:

• Closed hierarchies
• Extension indexers
• Collection expression arguments
• Labelled `break` and `continue`
• More memory-safety improvements

Not every new language feature changes how we write day-to-day code, but union types definitely feel like one that could.

I’m looking forward to trying them in real-world applications and seeing how much custom result/error-handling code they can replace.

Microsoft’s full C# 15 overview:
https://t.co/LHotbRohhb

𝗪𝗵𝗶𝗰𝗵 𝗖# 𝟭𝟱 𝗳𝗲𝗮𝘁𝘂𝗿𝗲 𝗮𝗿𝗲 𝘆𝗼𝘂 𝗺𝗼𝘀𝘁 𝗶𝗻𝘁𝗲𝗿𝗲𝘀𝘁𝗲𝗱 𝗶𝗻?

#dotnet #csharp #csharp15 #softwaredevelopment #backenddevelopment

[Nikesh Pandya @ImNpandya]

Apple just dropped its first foldable, the iPhone Duo — $1,999, 7.6" screen, 2nm chip, on-device AI.

Same week: OpenAI pauses Pro signups from Astra demand, Anthropic faces safety walkouts, agents keep breaking bounds.

Hardware got weirder. The AI race got real.

[Nikesh Pandya @ImNpandya]

Looking to connect with more good people here 🤝

Tech, AI, coding, startups, business or just interesting minds.

Say hi 👋

Let’s connect.

[Nikesh Pandya @ImNpandya]

The best part of building software is realizing how much there is still to learn.

One day you're fixing a small bug. The next, you're exploring AI, improving architecture, or figuring out why something works in development but not in production.

Every problem teaches you something.

I'm trying to spend more time building, experimenting, and sharing what I learn along the way.

What are you building or learning this week?

#BuildInPublic #SoftwareDevelopment #AI #Coding #Tech

[Tibo @thsottiaux]

Because we are beyond happy to have Astra rolled out today ahead of schedule and you have been super patient with us (not really, but it’s ok!)… we will do the full banked reset today too for all Plus, Pro and Business users. Lands end of day.

Happy Astra day and enjoy a phenomenal weekend.

PS: If you create the account or upgrade before 8pm PT you will get it too. Still time!

[Nikesh Pandya @ImNpandya]

AI is changing the way I write code.

Earlier, I used AI mostly to explain errors or generate small snippets.

Now I’m starting to give it complete tasks — understand the existing code, find the problem, make the change, and verify it.

The interesting part isn’t “AI can code” anymore.

It’s how much of the development workflow we can actually delegate.

[Nikesh Pandya @ImNpandya]

@BabaDev_ what that habit is?

[Nikesh Pandya @ImNpandya]

@anupamrjp https://t.co/BuFd8YEG29

Let's check this.

[Nikesh Pandya @ImNpandya]

@RaunakSood_T1D Done

[Nikesh Pandya @ImNpandya]

Hey builders 👋

Looking to connect with people who are into:

• Vibe coding
• Software development
• AI & ML
• Building SaaS/products
• Building in public
• Exploring new tech & ideas

If you're building something, experimenting with AI, or just love tech — let's connect and learn from each other.

Drop a 👋 and I’ll follow you!

#BuildInPublic #VibeCoding #AI #SoftwareDevelopment

[Nikesh Pandya @ImNpandya]

@bidyut_io Done