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Show HN: Skatanica – Browse and share skate clips by location https://ift.tt/2YOwMyp

Show HN: Skatanica – Browse and share skate clips by location https://skatanica.com (no login or download required) I love Dern Bros skate spot history videos, and wanted to see 1.) places my favorite skaters have skated 2.) which skaters had skated my favorite places 3.) find new skaters and new places 4.) have an easy way to just watch clips 5.) have an easy place to document tricks I/people have done anywhere Some examples: 1.) Clips from Dominick Walker: https://ift.tt/iYkOhME 2.) Skaters at Santa Monica Triple Set: https://ift.tt/OuJI3LH 3.) Find some spots/clips from spots in [Southern California]( https://ift.tt/MQdAFcB ) , or [Southeast Asia]( https://ift.tt/LjHyu31 ) --- Contributing as a Curator: If you like this, and you want to go beyond just sharing a clip here or there, I've built a ton of curator tools specifically for quickly chopping up long videos into clips and labeling the tricks/publishing directly to platform. Message me or comment and I can give you mor...
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Safer Trips to Class: Share Your Ideas on Safe School Connections

Safer Trips to Class: Share Your Ideas on Safe School Connections By Glennis Markison-Busi From events to programs to projects, our teams work hard to make school trips safer. We’re working as a city to make San Francisco more livable for families. At the SFMTA, that means giving families more options to get around. That’s why we’re excited to launch Safe School Connections. This new initiative builds on the years of work we’ve done to make school trips safer and easier. Our long-term goal is to connect all 249 K-12 schools (public and private) in San Francisco to the city’s biking and rolling network. Learn how community members shaped Safe School Connections, and how we’ll keep... Published 2026-09-02T00:00:00Z https://ift.tt/XtfbZ8C
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Show HN: Windrunner – AI-powered project collaboration workspace https://ift.tt/hO89bvA

Show HN: Windrunner – AI-powered project collaboration workspace https://shzlw.github.io/windrunner/ September 2, 2026 at 07:19PM
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Show HN: Newton's Orchard – Browser-based space/gravity playground https://ift.tt/467WVFb

Show HN: Newton's Orchard – Browser-based space/gravity playground Hi HN! My son spent a lot of time in 5th grade playing with the 2-dimensional PhET gravity/space sims[1]. His STEM class uses it, and he was playing with it at home, and has been looking for more. I found several space sims/playgrounds online, including NASA's Eyes on the Solar System[2], but nothing that seemed to offer a real progression from what he was getting out of the PhET sims, so I built Newton's Orchard over the summer for him. https://ift.tt/mDTGgpU The source is also published at https://ift.tt/QqOZPl9 It features deterministic time scrubbing, all bodies are editable, different preset systems and experiments, missions to complete (complete 3 to unlock the blackhole object type and mission), and a gallery for user submissions. I would very much appreciate feedback from HN - particularly from the lens of making it engaging and illuminating for students, and anyone that would like to just get a ...
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Show HN: Semantic Overlays – an NX bit for LLM prompt injection (live demo) https://ift.tt/iVNq9cm

Show HN: Semantic Overlays – an NX bit for LLM prompt injection (live demo) I've built a new method for steering LLMs called Semantic Overlays, small trained adapters on a frozen model which change how it perceives a piece of its context. The most readily applicable usage is to mitigate prompt injection, and it lets us take a very-injectable Qwen-3.5-9B to SOTA scores on all the prompt injection benchmarks I could find. (They are only blackbox attacks, but I did NOT train on anything like them — whitebox attacks are out of scope for this paper) I'm excited for you to play with the tech — see if YOU can break it! (let me know if you can) Paper at https://ift.tt/lOJMxfq if you want to read more about it, code at https://ift.tt/lzQi5kc , adapters at https://ift.tt/xBkVXOe... Also https://ift.tt/7zmOEcl if you wanna watch a little video I made! https://semantic-overlays.vercel.app/ September 2, 2026 at 12:40AM
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Celebrate Transit Month on Muni

Celebrate Transit Month on Muni By Service improvements and increasing ridership numbers are making Transit Month even more joyful for us. Muni moves San Francisco all year long. But September is special because it’s Transit Month! We kicked things off this morning with a rally featuring Mayor Daniel Lurie and Director of Transportation Julie Kirschbaum on the steps of San Francisco City Hall. And we have a lot to celebrate this year: • A strong Muni ridership recovery that shows an increasing demand for public transit since COVID. Earlier this year, our weekend ridership surpassed pre-pandemic levels! • Service improvements... Published 2026-09-01T00:00:00Z https://ift.tt/Fhw0NsY
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Show HN: Running 104GB Qwen3.8-Flash-Next on 48GB Mac with at ~12 tok/s https://ift.tt/GzPnpFY

Show HN: Running 104GB Qwen3.8-Flash-Next on 48GB Mac with at ~12 tok/s I built slotstream, a way to run Qwen3.8-Flash-Next 4-bit on a low-memory mac starting from 16GB, a 125B parameter model that would need 100GB+ memory/RAM, thanks to expert-offloading/ssd-streaming. Easy to install/update, and mac-native using MLX and Swift. It ships with auto-mode, which makes a good tradeoff between memory usage and speed. I'll be implementing and porting the MTP module for speculative decoding next https://ift.tt/1z973fV September 1, 2026 at 11:42PM
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