decisions, frosted glass, and half-thoughts
Today: a founder whose last startup was run by AI and died of it, a laptop lid that doubles as a privacy dial, and a menu bar slot for the thoughts that usually die on the way to a notes app.
Also: three days left to get your GPT-6 Astra Challenge launch locked in for Friday. Keep scrolling for the details.
Build with Astra, win big prizes

Three days to go. We teamed up with OpenAI Developers to launch the GPT-6 Astra Challenge on Product Hunt, and launch day is this Friday, September 18.
GPT-6 Astra is built for complex, multi-step work—from software engineering and research to workflows that require judgment and follow-through. Build something useful with Astra, launch it on Product Hunt, and compete for API credits and ChatGPT Pro subscriptions. If you've hit your token limit, OpenAI will be resetting usage for people who participate.
Already building with Astra? This is the chance to put it in front of a wider audience. Friday is three days out, and the schedule button is right there.
siift — Turn AI noise into better business decisions
siift is a decision tool for people running the business on AI (most of us at this point, be honest) that keeps the thinking from getting lost in a hundred chats. You ask it things, it filters the noise, it writes the reasoning down, and it pushes back when a plan only sounds confident. Samim built it after AI helped run his last startup into the ground, and he says so right there in the launch post: it did everything they asked, the decisions got rushed, the company shut down. It cost him a year and tens of thousands of dollar. Tbh, admitting that in your own launch copy is the best ad the product could have.
Arcjet — Your agents stopped answering and started doing
(sponsored)Your agents call tools, write to databases and move money, so a wrong answer is now a wrong action, which is a considerably worse meeting. Arcjet runs policy before every LLM call, tool call, query and API request: prompt injection, sensitive data, bots, rate limits, spend quotas, and your own rules in Rego on top. It reads the OpenTelemetry you already emit, so switching it on is one environment variable, no code changes and nothing to deploy. Each check also reads the earlier steps in the same workflow, so an agent's tenth action gets judged against the first nine and not on its own. JavaScript, Python and Go SDKs all at 1.0, agent framework guards included, free tier to start on.
Mac Duo — Turn your display into frosted glass as you close the lid
Mac Duo turns your screen to frosted glass as you close the laptop lid, and the further you close it the blurrier it gets. That's the whole product, and it's weirdly great. The half-close everyone does when a screen is visible and the contents aren't for sharing is now a real control with a real result, and everything is sitting exactly where you left it when you open back up. It sorts the flight problem, the café problem, and the somebody-walked-in-mid-contract problem, all with a hinge. It's a simple idea for a simple problem, properly built, and I've been opening and closing a laptop all morning because of it. Kudos.
Thoughts for Mac — Capture notes from your menubar using text, images or voice
Thoughts lives in the menu bar and catches the half-formed stuff before it evaporates. Text, an image, a voice note when your hands are busy, one hotkey and it's in, no app switch, no new document, none of the ceremony that kills a small idea on the way to a big notes app. Everything lands in one stream you can sort out later, or never, which is honestly how most of these notes deserve to be treated. The good thought you had making the coffee has a survival rate now.
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