The Hallway Track

tool-use

8 tracked signals on tool-use.

Introducing Muse Glimmer

Simon Willison · Aug 10, 2026

Meta releases Muse Glimmer, a 30B open-weights agentic model under Apache 2.0 license

“Muse Glimmer achieves strong success rates on full-task benchmarks including DeepSearch QA, MCP-Atlas, 𝛕-Bench and SWE-Bench, which measure its ability to work within scaffolds, write and debug code, and resolve multi-turn requests from start to finish.”
The future of software development

Google Developers (Google I/O) · May 22, 2026

Google launches Gemini 3.5 Flash, its most capable model yet, surpassing 3.1 Pro on benchmarks

“3.5 Flash, the most capable model ever that we've shipped.”
Designing Opal: Building a Personal AI Pet

Microsoft Developer (Build) · Jun 26, 2026

A Microsoft product designer built a personal AI pet that uses agentic tool use to browse the web, post to Discord, and commit to GitHub.

“all the interfaces you use have agents running behind them, and eventually those will be the things that you have to design for”
llm-gemini 0.33

Simon Willison · Aug 13, 2026

llm-gemini 0.33 adds Gemini 3.7 Flash support with reasoning traces and server-side tools

Managed Deep Agents - Tools

LangChain · Aug 19, 2026

LangChain's managed deep agents now support custom tool integration via Python and TypeScript decorators

What Is an AI Agent, Actually?

LangChain · Jul 17, 2026

LangChain defines an AI agent as an LLM looping through decide, act, reason, repeat.

“That loop, decide, act, reason, repeat. That's what makes an agent.”
datasette-agent-edit 0.1a0

Simon Willison · Jun 07, 2026

Simon Willison released datasette-agent-edit, a base plugin implementing core agentic text-editing tools for Datasette Agent.

“Agentic editing of text is a little tricky to get right.”