Claude Code Mods launched on 1 October, and they're on by default since Claude Code v2.1.287. A mod is a plugin made of JavaScript or TypeScript handlers that run inside Claude Code: it can step into tool calls and prompts, add slash commands and tools, and draw its own panes in the terminal. I wrot
On Tuesday (29 September), at DevDay, OpenAI launched Dots): always-on agents that live inside ChatGPT and keep working when you close the window.
On 29 September 2026, OpenAI added a third Pro tier to ChatGPT: ChatGPT Pro 500. It costs $500 a month, has the highest included usage of the Pro plans, and is the only Pro plan with GPT-6 Astra Ultrafast in ChatGPT Work and Codex.
On 22 September 2026, OpenAI released GPT-6 Sol and GPT-6 Luna, the faster and cheaper siblings of GPT-6 Astra. It landed about an hour after Anthropic shipped Claude Opus 5.5. Simon Willison covered both releases in one write-up, calling it "a new price war".
I've released two updates of the Life Tracker plugin for Obsidian today: 3.1.0 and 3.2.0. Most changes are quality of life things that some of you asked for in the Knowii Community.
Tools
Every capture used to cost me the same routine: open the daily note, scroll, find the right heading, write. So I built Quick Actions into the Obsidian Starter Kit v5. One click, type, done. Here's how they work and why removing that friction matters.
Tools
10,000+ movies, TV shows, anime, video games and board games now live as plain Markdown notes in my Obsidian vault. Here's how the Media Management System of the Obsidian Starter Kit works, from the note types to the Bases, the MoCs and the AI skills, and what it lets me do.
OpenHarness (the app itself is just called "Harness") is an open-source command center for coding agents, built by Autonomous (autonomous.ai). Their tagline: "The ultimate harness for coding agents and beyond. All your agents. All your machines. One command center."
GPT-6.1 Sol is the middle model of OpenAI's GPT-6 family, between GPT-6 Luna and GPT-6 Astra. OpenAI released it on 29 September 2026, at DevDay, exactly one week after GPT-6 Sol. It replaces GPT-6 Sol as "the newer Sol model" in the API docs, so GPT-6 Sol had the shortest run as OpenAI's current So
Before you type anything, a Claude Code session already loads the system prompt, tools, MCP servers, agents, memory files and skills. All of it takes space in the same Context Window, and all of it is sent with every request.
Tools
A newsletter discussing AI, Knowledge Work, Knowledge Management Systems, Zen Productivity, Personal Organization, and everything in between!
I just shipped Obsidian Starter Kit 5.0.1. After v5.0.0 went out on September 25, some of you told me that the daily note template wasn't always applied. You were right, and the cause was a change in Templater.
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