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Microsoft Developer

@msdev

Catch up on all the news from @GitHub Universe

githubuniverse.com/
Joined February 2013
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Nine engineers. 1,211 pull requests in a day. Go behind the scenes of building Copilot Cowork for six lessons on engineering with agents, including how the team moved its runtime from Python to Rust while the product was live. commandline.microsoft.com/ho…
Lessons from building Copilot Cowork

Lessons from building Copilot Cowork

Plus a case study where we put everything together by moving our runtime from Python to Rust while live.

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Claude Fable 5.2, Anthropic’s newest Fable model, is now generally available in GitHub Copilot and Microsoft Foundry. In early testing, Fable 5.2 solved more tasks than 5.1 with fewer steps and tool calls.
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We just released a free course: GitHub Copilot app for Beginners. It includes 7 chapters and a hands-on project that walks through core agent-development concepts.
Text reads, “GitHub Copilot App for Beginners.” Abstract gradient shapes and a robot icon are displayed on a dark background.

ALT Text reads, “GitHub Copilot App for Beginners.” Abstract gradient shapes and a robot icon are displayed on a dark background.

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Jump in and start building 👇 msft.it/6019aAvLd
GitHub - github/copilot-app-for-beginners: Learn how to get started using the GitHub Copilot app!

GitHub - github/copilot-app-for-beginners: Learn how to get started using the GitHub Copilot app!

Learn how to get started using the GitHub Copilot app! - github/copilot-app-for-beginners

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.@fal is coming to Microsoft Foundry. This partnership brings video models including Kling, LTX, and MiniMax to Foundry Models, giving developers more choice for building video and multimodal experiences.
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Building the next generation of multimodal AI experiences with fal in Microsoft Foundry | Microsoft...

Building the next generation of multimodal AI experiences with fal in Microsoft Foundry | Microsoft...

Video workloads do not all start with the same input or aim for the same result. A creative team might explore several interpretations of a written brief. A...

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Moonshot AI’s Kimi K3.1 Pro is available in Microsoft Foundry. Build coding, research, and document agents with an open-weight model featuring text and image understanding and up to 1M tokens of context.
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msft.it/6016aA1Zw

Moonshot AI’s Kimi K3.1 Pro comes to Microsoft Foundry | Microsoft Community Hub

The hardest work for an AI agent rarely fits into a single prompt. A coding agent may need to follow a change across a large repository. A research agent may...

techcommunity.microsoft.com
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Microsoft Developer retweeted
GitHub (@github) profile picture
GitHub
@githubNov 1
It’s time to make SHIFT happen. 🕹️ The theme for GitHub Game Off 2026 is SHIFT. Shift gears. Shift perspectives. Shift reality. Or make a game controlled by the Shift keys. Your call. You’ve got November to make something weird and wonderful. github.blog/open-source/gami…
Game Off 2026: The theme is SHIFT

Game Off 2026: The theme is SHIFT

GitHub’s annual month-long game jam is back for its 14th year! This November, make a game inspired by the theme SHIFT.

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GitHub Universe Day 2 Keynote xitter.twitterapi.xyz/i/broadcasts/1mGPaZeoZ…
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Microsoft Developer

GitHub Universe Day 2 Keynote

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Microsoft Developer retweeted
Chubby♨️ (@kimmonismus) profile picture
Chubby♨️
@kimmonismusOct 28
This is one of the most interesting reveals today: Copilot Fusion on GitHub Copilot. It offers roughly the intelligence of Opus 5.5 at 50% less cost. A truly impressive achievement. Kudos @github
Image from Chubby♨️ (@kimmonismus)
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The @github engineering team built a best-in-class, truly multi-model harness, which we've implemented across Microsoft products. Introducing Microsoft Copilot harness in Foundry Agent Service, a simpler way to build agents without rebuilding the execution layer. It handles orchestration, tools, context, and controls so you can focus on your agent’s skills and outcomes. Watch @jeffhollan's demo to see it in action.
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More on the Microsoft Copilot harness and how to get started. devblogs.microsoft.com/found…
Introducing the Microsoft Copilot harness in Foundry Agent Service | Microsoft Foundry Blog

Introducing the Microsoft Copilot harness in Foundry Agent Service | Microsoft Foundry Blog

A model can reason about a task. Completing that task takes more: the right context, tools, execution environment, and controls, and an agent loop that

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Microsoft Developer retweeted
GitHub (@github) profile picture
GitHub
@githubOct 28
Frontier performance at a fraction of the cost. In the @ArtificialAnlys Coding Agent Index, Copilot Fusion Max scored within two points of Claude Code with Opus 5.5 Max at about half the API cost per task. Get 30% off through Nov. 30. Try it now. ⬇️ docs.github.com/copilot/conc…
Chart titled "Coding Agent Index vs. Cost per Task" by Artificial Analysis. The chart displays Artificial Analysis Coding Agent Index vs. average pay-per-token API cost per task (USD). It compares various agents, including some from Claude Code, Codex, Antigravity CLI, DeepSeek Harness, Grok Build, Opencode, Muse Code, Kimi Code CLI, and GitHub Copilot. The x-axis represents higher cost per task (USD) to lower cost per task (USD), and the y-axis represents the coding agent index. The chart highlights a "Most Attractive Quadrant" in green and uses dots to differentiate agents. Copilot Fusion (max) sits within the most attractive quadrant.

ALT Chart titled "Coding Agent Index vs. Cost per Task" by Artificial Analysis. The chart displays Artificial Analysis Coding Agent Index vs. average pay-per-token API cost per task (USD). It compares various agents, including some from Claude Code, Codex, Antigravity CLI, DeepSeek Harness, Grok Build, Opencode, Muse Code, Kimi Code CLI, and GitHub Copilot. The x-axis represents higher cost per task (USD) to lower cost per task (USD), and the y-axis represents the coding agent index. The chart highlights a "Most Attractive Quadrant" in green and uses dots to differentiate agents. Copilot Fusion (max) sits within the most attractive quadrant.

Bar chart titled "Artificial Analysis Coding Agent Index". Incorporates 3 benchmarks: FrontierCode v1.1, Terminal-Bench 4.0, SWE-Atlas-QnA-AA. A higher scroe denotes higher average intelligence across becnhmarks. Copilot Fusion Max from GitHub Copilot has a score of 60. The chart also includes various coding agents from Claude Code, Devin Fusion CLI, Antigravity CLI, Codex, Grok Build, DeepSeek Harness, Muse Code, Opencode, Antigravity CLI, and Kimi Code CLI, with scores ranging from 62 to 41. Source and logo of Artificial Analysis are included at the bottom.

ALT Bar chart titled "Artificial Analysis Coding Agent Index". Incorporates 3 benchmarks: FrontierCode v1.1, Terminal-Bench 4.0, SWE-Atlas-QnA-AA. A higher scroe denotes higher average intelligence across becnhmarks. Copilot Fusion Max from GitHub Copilot has a score of 60. The chart also includes various coding agents from Claude Code, Devin Fusion CLI, Antigravity CLI, Codex, Grok Build, DeepSeek Harness, Muse Code, Opencode, Antigravity CLI, and Kimi Code CLI, with scores ranging from 62 to 41. Source and logo of Artificial Analysis are included at the bottom.

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GitHub Universe Day 1 Keynote xitter.twitterapi.xyz/i/broadcasts/1nJOLQRyl…
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Microsoft Developer

GitHub Universe Day 1 Keynote

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Microsoft Developer retweeted
Marlene Mhangami (@marlene_zw) profile picture
Marlene Mhangami
@marlene_zwOct 26
Last week in Cologne I showed how you can use the GitHub Copilot App and Foundry to build an agent you can deploy across Teams, Outlook or an app of your choice. I also showed how you can integrate our new Decision 1 model for intent classification. I'm interested in agents that can recognise intent and then take action independetly if they decide they can be helpful, so this was fun to show!
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GPT-6.1 Terra from @OpenAIDevs is now available in GitHub Copilot and Microsoft Foundry. It's designed for everyday agentic coding and terminal work, with focused execution on well-scoped tasks at a lower cost than GPT-6.1 Sol.
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Generating code is getting easier. Knowing whether to trust it is the hard part. Microsoft engineers share how they combine agents, testing, and formal verification to validate changes across massive codebases, including C/C++ to Rust migrations. commandline.microsoft.com/ag…
Cheap code, precious trust: Code modernization at scale

Cheap code, precious trust: Code modernization at scale

The promise—and challenges—of agentic software engineering, from large-scale code migration to language modernization.

commandline.microsoft.com
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1.2B users. ~40 regions. Single-digit-millisecond latency. One team. @AzureCosmosDB and @OpenAIDevs engineers scaled it together. Read the story 👇
OpenAI Developers (@OpenAIDevs) profile pictureOpenAI Developers
@OpenAIDevsOct 23
We serve data in milliseconds to more than 1.2 billion users across 40 geographic regions. To reach that scale, we worked closely with @AzureCosmosDB on our storage architecture, achieving a 12x improvement in global median read latency.
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You built it. Now put it in play. It’s not too late to submit your Inside the Game: Developer Hackathon project by Oct. 27 for the opportunity to have your work recognized and showcased. Finish your submission: msft.it/6014axj40
A promotional image for a Developer Hackathon titled 'Inside the Game.' The background is black with green text. Logos for Premier League and Microsoft are displayed at the top. Geometric shapes are subtly integrated into the design.

ALT A promotional image for a Developer Hackathon titled 'Inside the Game.' The background is black with green text. Logos for Premier League and Microsoft are displayed at the top. Geometric shapes are subtly integrated into the design.

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