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Open Source @Github

How we exploited CodeRabbit: From simple PR to RCE and write access on 1M repos

https://research.kudelskisecurity.com/2025/08/19/how-we-exploited-coderabbit-from-a-simple-pr-to-rce-and-write-access-on-1m-repositories/
371•spiridow•5h ago•122 comments

D2 (text to diagram tool) now supports ASCII renders

https://d2lang.com/blog/ascii/
114•alixanderwang•3h ago•15 comments

Emacs as your video-trimming tool

https://xenodium.com/emacs-as-your-video-trimming-tool
135•xenodium•5h ago•68 comments

Without the futex, it's futile

https://h4x0r.org/futex/
203•eatonphil•7h ago•99 comments

Perfect Freehand – Draw perfect pressure-sensitive freehand lines

https://www.perfectfreehand.com/
64•NikxDa•1h ago•4 comments

Show HN: OpenAI/reflect – Physical AI Assistant that illuminates your life

https://github.com/openai/openai-reflect
20•Sean-Der•1h ago•7 comments

How Figma’s multiplayer technology works (2019)

https://www.figma.com/blog/how-figmas-multiplayer-technology-works/
71•redbell•3d ago•32 comments

The new geography of stolen goods

https://www.economist.com/interactive/britain/2025/08/17/the-new-geography-of-stolen-goods
49•tlb•1d ago•30 comments

Candle Flame Oscillations as a Clock

https://cpldcpu.com/2025/08/13/candle-flame-oscillations-as-a-clock/
203•cpldcpu•3d ago•41 comments

Vendors that treat single sign-on as a luxury feature

https://sso.tax/
143•vinnyglennon•1h ago•75 comments

Notion releases offline mode

https://www.notion.com/help/guides/working-offline-in-notion-everything-you-need-to-know
123•ericzawo•2h ago•87 comments

AnduinOS

https://www.anduinos.com/
46•TheFreim•2h ago•58 comments

Why Semantic Layers Matter (and how to build one with DuckDB)

https://motherduck.com/blog/semantic-layer-duckdb-tutorial/
40•secondrow•4h ago•2 comments

Custom telescope mount using harmonic drives and ESP32

https://www.svendewaerhert.com/blog/telescope-mount/
238•waerhert•11h ago•86 comments

Lazy-brush – smooth drawing with mouse or finger

https://lazybrush.dulnan.net
543•tvdvd•4d ago•67 comments

A renovation project in Turkey led to the discovery of a lost city (2023)

https://www.atlasobscura.com/articles/derinkuyu-turkey-underground-city-strange-maps
52•areoform•5h ago•13 comments

Branch prediction: Why CPUs can't wait?

https://namvdo.ai/cpu-branch-prediction/
13•signa11•3d ago•14 comments

The joy of recursion, immutable data, & pure functions: Making mazes with JS

https://jrsinclair.com/articles/2025/joy-of-immutable-data-recursion-pure-functions-javascript-mazes/
20•jrsinclair•1d ago•1 comments

Launch HN: Uplift (YC S25) – Voice models for under-served languages

75•zaidqureshi•9h ago•35 comments

CRDT: Text Buffer

https://madebyevan.com/algos/crdt-text-buffer/
8•skadamat•1h ago•0 comments

Show HN: Chroma Cloud – serverless search database for AI

https://trychroma.com/cloud
67•jeffchuber•1d ago•21 comments

How to Build a Medieval Castle

https://archaeology.org/issues/september-october-2025/features/how-to-build-a-medieval-castle/
208•benbreen•16h ago•62 comments

Geotoy – Shadertoy for 3D Geometry

https://3d.ameo.design/geotoy
85•Ameo•1d ago•15 comments

CRLite: Certificate Revocation Checking in Firefox

https://hacks.mozilla.org/2025/08/crlite-fast-private-and-comprehensive-certificate-revocation-checking-in-firefox/
34•TangerineDream•5h ago•2 comments

Launch HN: Parachute (YC S25) – Guardrails for Clinical AI

48•ariavikram•6h ago•19 comments

Critical Cache Poisoning Vulnerability in Dnsmasq

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2025q3/018288.html
106•westurner•8h ago•71 comments

Positron, a New Data Science IDE

https://posit.co/blog/positron-product-announcement-aug-2025/
110•kgwgk•7h ago•36 comments

Prime Number Grid

https://susam.net/primegrid.html
256•todsacerdoti•13h ago•89 comments

Medical cannabis patient data exposed by unsecured database

https://www.wired.com/story/highly-sensitive-medical-cannabis-patient-data-exposed-by-unsecured-database/
33•hacker_yacker•2h ago•10 comments

"Remove mentions of XSLT from the html spec"

https://github.com/whatwg/html/pull/11563
302•troupo•6h ago•369 comments
Open in hackernews

Show HN: OpenAI/reflect – Physical AI Assistant that illuminates your life

https://github.com/openai/openai-reflect
20•Sean-Der•1h ago
I have been working on making WebRTC + Embedded Devices easier for a few years. This is a hackathon project that pulled some of that together. I hope others build on it/it inspires them to play with hardware. I worked on it with two other people and I had a lot of fun with some of the ideas that came out of it.

* Extendable/hackable - I tried to keep the code as simple as possible so others can fork/modify easily.

* Communicate with light. With function calling it changes the light bulb, so it can match your mood or feelings.

* Populate info from clients you control. I wanted to experiment with having it guide you through yesterday/today.

* Phone as control. Setting up new devices can be frustrating. I liked that this didn't require any WiFi setup, it just routed everything through your phone. Also cool then that they device doesn't actually have any sensitive data on it.

Comments

Sean-Der•1h ago
I also have been working with Daily on https://github.com/pipecat-ai/pipecat-esp32

I see so much potential if I can make hardware hacking + WebRTC easy. Not just for AI assistants but security cameras + robotics. If anyone has questions/ideas/feedback here to help :)

joshu•34m ago
what is Daily?
baxtr•1h ago
If you want to know what this is about, here’s the video they provided:

https://www.youtube.com/watch?v=G5OUnpPAyCg

TZubiri•41m ago
I get that this is as-is, but I wonder if so many ultra-alpha products don't dilute the OpenAI brand and create redundancy in the product line. It feels like the opposite of Apple's well thought out planned product design and product line.

Let's see if it pays out.

Telemakhos•25m ago
Somewhere in here there's a joke about how many tokens it takes to turn on a lightbulb.
throwup238•9m ago
It deserves a minor rewrite of the Fifteen Million Merits Black Mirror episode where people do menial labor like folding laundry and washing dishes to earn tokens so that their AI will turn on their lightbulbs and dispense their toothpaste.
voxelizer•5m ago
I love seeing that hackathons are encouraged inside OpenAI and most importantly, that their outcome is also shared :)