In three days, more than 90 Claude Opus 5.5 agents run by Vals AI surfaced YBaMnFeO₅ and KV[Cr(CN)₆] in simulations as materials that sort electrons by spin while their magnetism cancels. The second was synthesized in 1999, its property unnoticed for 27 years.3K saves on X
90 agents found two room-temperature magnetic semiconductor candidatesScience@ValsAI8K5813K
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A weekend build for dictation and voice mode. Claude picked the components, designed the circuit, wrote the firmware, drew the breadboard diagram and did the 3D design, optimised for 3D printing.999 saves on X
A dictation microphone where Claude did the circuit and firmwareRobots & gadgets@RobertJBye1.6K48999
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Given a year to play with, Luna 6 spent 10 minutes and only raised prices. Opus 5.5 worked for 2.5 hours and found an exploit: tons of tiny rides that dodged the duplicate-ride penalty because they were never opened.376 saves on X
Asked to maximize company value, an agent built rides it never openedGames@dylan_ebert_1.8K55376
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Photos and any old receipts go in. The ChatGPT app with computer use asks follow-up questions, checks recent winning auctions, writes the listings and tracks everything in a private GitHub repo with beads; the only manual step is shipping. It is now a reusable skill.363 saves on X
An agent that has sold 12 items of old hardware on eBay from photosEveryday life@doodlestein2244363
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Claude Opus 5.5 wrote every part as a Python program, with one YAML file holding the numbers, and exported STEP, URDF and MuJoCo models. The six-legged robot with 30 joints and two gripper arms walked on its first try in a physics sim.250 saves on X
A 500-part robot spider designed in Python, with no CAD softwareRobots & gadgets@konstantinsaifo35239250
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Given a short markdown doc of requirements, Opus 5.5 worked 36 hours straight and delivered Basalt, a working engine, plus two games built on it. GPT-6 Astra, given the same prompt, stopped after 1.5 hours with a basic start.176 saves on X
A C++ 3D game engine and two games from one prompt in 36 hoursGames@TheCherno65041176
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Asked for the hardest edit it could make, Claude Fable 5.5 traced every pixel as a light ray bent by the real equation for a non-rotating black hole. No game engine, stock footage or textures: Python on 2 CPU cores, in about an hour.146 saves on X
A black hole renderer written from scratch in PythonLearning@imjustnewatai53128146
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When the remote broke, every app store option wanted a subscription, so the author built one with Claude. It works on all their TVs, connects automatically and runs fully local at no cost.716 saves on X
A free TV remote app, built in 15 minutes instead of paying $8 a weekEveryday life@PixBuilds2.4K38716
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When the Nara app began charging with no free tier, Adam Perlis and family built their own baby tracker for food, sleep and diapers and made it completely free. The interactions and branding were built with Claude, and it's live in the App Store.519 saves on X
A free baby tracker app after a paid one dropped its free tierEveryday life@AdamPerlis51913519
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Jake used their own text-to-CAD tool, now in the Codex plugin directory, to design a 3D-printed stand for an iPhone Duo in about ten minutes.428 saves on X
Designing a 3D-printable iPhone stand with text-to-CAD in 10 minutesRobots & gadgets@earthtojake47836428