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CopilotKit releases OpenDuet, a self-hostable template for proactive background agents

CopilotKit published OpenDuet, an open-source starter for an always-on assistant that sends a daily brief, watches connected apps and keeps one ongoing thread by text or voice. It asks for approval before sensitive actions such as sending messages or paying invoices, and connects to any agent backend through the AG-UI protocol.

Why it matters

A clonable starting point for proactive agents with built-in human approval steps, instead of building that UX layer from scratch.

Source: Read the full story on CopilotKit

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AI Tools & Open Source / Trending Open-source Projects

LangChain open-sources its Slack design agent for on-brand decks, charts and motion graphics

LangChain published the code for Content Studio, the internal agent its team uses in Slack to make slides, diagrams, social images and short animations. It runs on Deep Agents with a sandbox per thread, and every asset is generated as editable code rather than flat images, so small changes don't require regenerating from scratch. It is Apache-2.0 licensed.

Why it matters: A working reference for building a skills-plus-sandbox agent that outputs editable artifacts, ready to fork with your own brand pack.

Read on LangChain (GitHub)
AI Tools & Open Source / Coding Assistants

GitHub makes Copilot Fusion multi-model routing generally available at Universe 2026

At GitHub Universe, Copilot Fusion left research preview and became available on every Copilot plan. Picking Fusion in the model picker hands each prompt to a router that decides which models to call and how to combine them, with Standard, High and Max effort levels. GitHub says Fusion Max lands near top single models on a coding-agent index at roughly half the cost.

Why it matters: Teams can stop hand-picking models per task; admins still control which models Fusion may route to, and billing stays per underlying model.

How to try it

Copilot Fusion is a routing system you select instead of a single model; it works in VS Code, the GitHub Copilot app, Copilot CLI and JetBrains IDEs on all Copilot plans, billed at each routed model's rate.

  1. Update VS Code (1.144+), the GitHub Copilot app, Copilot CLI or your JetBrains Copilot plugin.
  2. Open the Copilot model picker and select Fusion.
  3. Choose an effort level: Standard, High or Max.
  4. Org admins: set which models Fusion may use via enterprise/organization model policies, and optionally make Fusion the default via enterprise managed settings.
Open the docs
Big newsRead on The GitHub Blog
AI Tools & Open Source / Coding Assistants

Android Dev Summit: Android CLI ships as official Claude Code and Codex plugin; bring-your-own-agent goes stable

Google's Android tooling update makes the Android CLI an installable plugin for Claude Code, Codex and Antigravity, giving agents commands for Compose previews without an emulator, remote real devices, profiling and Play-style bundle analysis. Android Studio Rabbit 2 also makes its Agent Client Protocol support stable, so 40+ third-party coding agents can run inside the IDE.

Why it matters: Android teams can use their preferred coding agent with first-party device, preview and profiling tools; Google reports 77% faster UI tasks with fewer tokens.

Read on Android Developers Blog