Notes on AI agents, Copilot Studio, .NET and cloud engineering.
Call a six-second MCP tool as a task and poll it to completion with the C# Tasks extension: server and client code that ran, the client methods, and what to fix before production.
By Ajith Joseph · · #dotnet #csharp #mcp #aspnet-core
.NET 8 and .NET 9 reach end of support on November 10, 2026. A checklist for moving AI and MCP projects to .NET 10, and why .NET 11 can wait in CI for now.
By Ajith Joseph · · #dotnet #csharp #ai #aspnet-core
Require a human yes before an agent runs a risky tool in Microsoft Agent Framework. Tested numbers for approve and reject, and the local-function naming trap that made it look broken.
GPT-6 Astra and GPT-5.6 Terra are available in Copilot Studio only when OpenAI is enabled as a sub-processor. A governance checklist for agent owners and tenant admins.
By Ajith Joseph · · #security #copilot-studio #governance #ai-agents
Score model output in unit tests with Microsoft.Extensions.AI.Evaluation: the packages, a first relevance evaluation, how to assert safely, and rules for keeping an LLM judge repeatable.
By Ajith Joseph · · #dotnet #csharp #ai #testing
A production pipeline for IChatClient with Microsoft.Extensions.AI 10.x: cache, function invocation, OpenTelemetry and logging, why the order matters, and two tests that prove it.
By Ajith Joseph · · #dotnet #csharp #ai #middleware
The smallest stateless ASP.NET Core MCP server Copilot Studio can use, how to prove it with curl before touching the portal, whether an older client still works, and a failure checklist.
By Ajith Joseph · · #dotnet #copilot-studio #mcp #aspnet-core
What changed between MCP C# SDK 2.0 and 2.3: stateless HTTP by default, Tasks as an extension, nullable ServerInfo and stricter OAuth, with an upgrade checklist tested against a real server.
By Ajith Joseph · · #dotnet #csharp #mcp #aspnet-core
Copilot Studio is adding a reusable library of custom graders, generally available November 15, 2026. How to write graders that earn their place and keep the rubric under version control.
Microsoft says the enhanced Copilot Studio support for Copilot Chat agents reaches GA on October 26, 2026. What topics, connected agents, evaluations and lifecycle management change, and what to check first.
What WebMCP is, where it stands in October 2026, and how I added it to this blog: four tools, the exact code, real outputs, and the document.modelContext bug that hid them.
By Ajith Joseph · · #web-development #mcp #webmcp #ai-agents #chrome
Copilot Studio now runs agents on three harnesses. What each is for, the real trade-offs in cost and control, and how to decide, and migrate, without a rewrite for its own sake.
By Ajith Joseph · · #architecture #copilot-studio #github-copilot #ai-agents
How Copilot Studio credits are billed in October 2026: the rate table, a tested calculator, the enforcement rules, and the controls that stop a prototype from becoming a bill.
By Ajith Joseph · · #copilot-studio #cost-optimization #governance #copilot-credits
Run Copilot Studio agent evaluations from a pipeline with the Power Platform API, then block a release on regressions. A tested gate script, the auth caveats, and the pitfalls.
By Ajith Joseph · · #copilot-studio #power-platform #testing #ci-cd #ai-agents
Survey data shows agent adoption outrunning security. How Entra Agent IDs, MCP auth changes, and a deny-by-default tool gate (tested C#) give AI agents least privilege.
By Ajith Joseph · · #dotnet #security #authentication #copilot-studio #ai-agents
The EU delayed high-risk AI Act rules to 2027 and 2028, but Article 50 transparency duties already apply. What changed, what didn't, and a practical checklist for developers.
By Ajith Joseph · · #ai #eu-ai-act #compliance
Opus 5.5 and Sonnet 5.5 landed in September 2026. Verified Anthropic prices, the tokenizer trap, and a tested TypeScript router that cascades cheap to strong.
By Ajith Joseph · · #typescript #ai #claude #llm #cost-optimization
The July 2026 MCP spec removes sessions and the initialize handshake. Verified changes, real requests against a C# server, gateway routing, and a migration checklist.
Copilot Studio upgrades default models and retires old ones. A tested playbook to pin, evaluate, compare runs, and diff exported results so a model change never surprises you.
By Ajith Joseph · · #llm #copilot-studio #testing #ai-agents
Embed a Copilot Studio agent in a React customer portal securely: a .NET token broker, opaque session handles, safe context passing, and tools that cannot be prompt-injected.
By Ajith Joseph · · #react #dotnet #security #copilot-studio #ai-agents
A real-world Copilot Studio example with working C# code: build an MCP server over an existing order API, connect it as an agent tool, and ship it safely.
By Ajith Joseph · · #dotnet #csharp #copilot-studio #mcp #ai-agents
A hands-on, step-by-step guide to building, grounding, governing, and shipping a Microsoft Copilot Studio agent on the 2026 GitHub Copilot harness.
By Ajith Joseph · · #copilot-studio #power-platform #ai-agents
Learn how to build a production agent harness in .NET, with an orchestrator, specialized sub-agents, dedicated context windows, and durable state.
A practical migration guide from Claude Opus 4.7 to Opus 5 for agentic coding workflows, covering cost math, prompt changes, and real gotchas.
By Ajith Joseph · · #claude #llm #ai-agents
Learn how to optimize Core Web Vitals for AI-heavy Next.js apps with actionable tips, tools, and strategies to improve LCP, FID, and CLS....
By Ajith Joseph · · #ai #nextjs #web-performance