Tuesday, 15 September 2026

dbt Labs open-sourced dbt Charts: one YAML file for a whole dashboard (SQL for the query, YAML for the chart), so a chat agent doesn't dump a React app plus three chart libraries. Same file lives next to your models, validates in CI, renders to SVG/HTML/PDF/terminal; there's a hosted BI on top. Seventy-one points because this is the chart layer trying to leave the BI tool the way dbt pulled transforms out.

• 🪺OSS
• 🤖AI
• 🦾Agents

A Swift CLI that turns a Behringer FCB1010 — or any CoreMIDI source — into extra keys on a Mac: bind a stomp to a shell command, or stream JSONL into Hammerspoon. It only reads MIDI so it needs no Accessibility grants; the actions live in your shell. Twenty-one points, zero comments, the exact nerd-hobby Show HN I'd actually install if I had a pedal under the desk.

• 🛠️Hobby
• 🔩Hardware
• 🪺OSS

Huffman-encoded country flags as stripe/shape/band layers so France is basically three stripes, blue-white-red. Indonesia is the 11-bit winner; median is 55 bits, and 67 flags with coats of arms, eagles, or maple leaves just fall off the encoding. The Union Jack is a built-in cheat because reconstructing it from primitives would eat the budget.

• 🛠️Hobby

A 2017 starter pile, lightly updated in 2022: Lamport clocks, Byzantine Generals, FLP, Viewstamped Replication, Paxos, Raft, CRDTs, and Bitcoin wedged in. Two hundred twenty-three points because it is still the shortest way into the problem space, and the thread is people adding Armstrong, chain replication, and Paxos Made Live.

• ⚙️Systems
• 📜History

An eBPF LSM file-open agent was burning kernel time reconstructing paths and walking dentries on every open just to find which path-policy applied. They memoize the result in an LRU map keyed by mount-namespace plus mount id plus inode, skip hardlinks (i_nlink != 1), and a 200k same-file-open bench drops from 28 billion kernel cycles to 3.03 billion. Title screams not-AI because they open-sourced the security daemon as bomfather/agent and people now hear agent as LLM.

• ⚙️Systems
• 🔐Security

XCancel is the big public Nitter frontend for reading X without an account; the site is HTTP 451 and the operator says a new development in ongoing legal proceedings forced another shutdown, no details. X Corp already C&D'd Nitter and the instances in late August, they briefly came back, and now the flagship is dark again. Seven hundred forty-five comments because a lot of public stuff still only lives behind that login wall.

• 🪺OSS
• 🎭Culture

Ninth Circuit vacated Amazon's preliminary injunction against Perplexity's Comet shopping agent: on this record the user accesses Amazon.com, and the Assistant is a tool, not a CFAA person. Perplexity still screenshots the page and gets navigation instructions from its servers; the panel just refused to treat that as gaining entry to Amazon's computers, and they keep repeating the holding is narrow. Hundred fifty-seven points because everyone wants to know whether the anti-hacking statute is still the kill switch for agents that shop.

• 🦾Agents
• 🔐Security

Bryan O'Sullivan bought a tiny Xteink X3, flashed CrossPoint, and found the four-shade e-ink panel was drawing dark grey as black and putting eight-pixel stripes on any grey that sat next to another shade. Astra blamed Floyd-Steinberg dither; a column-average FFT and a test pattern pointed at the short greyscale nudge waveform, plus a LUT that selected a do-nothing table for dark grey. Two freeink-sdk PRs landed the same day — restore the missing shade, then use the longer XTH4 image mode — and the stripes dropped out of the spectrum.

• 🛠️Hobby
• 🔩Hardware
• 🪺OSS

Daniel Litt's follow-up to that math-is-ending talk: assume superhuman theorem-provers are here, then stop pretending a PDF is evidence anyone understood anything. He wants PhDs awarded on a brutal oral defense of a deep topic — AI-written or not — and hiring that actually talks to people instead of counting papers. I opened it because the operationalization is concrete (defense, seminars, research-program taste) instead of another collapse headline.

• 🧮Math
• 🤖AI

Russell's post-RustConf notes on not making Tokio sad: work backward from a real metric, yield on pipelined ready-reads if you care about P99, batch filesystem work because tokio::fs is a spawn_blocking tax, and never hold a mutex while flushing. The schedule-latency histogram is the symptom they actually watch; a contended metrics lock can park every worker at once. I glanced because it's the rare async post that tells you when long polls are fine.

• ⚙️Systems
• 🪺OSS

Valve finally put a number on Steam Frame: $1,059 for 256GB, $1,299 for 1TB, Half-Life: Alyx in the box, lottery signup through September 17. Onboard Snapdragon 8 Gen 3 with 16GB, dual 2160×2160 LCDs, SteamOS locally plus PC streaming; charger is $29 extra and color passthrough is a $149 nose-bridge camera. Four hundred seventy-four points of people doing Index-plus-Quest math after the RAM delay.

• 🎮Games
• 🔩Hardware

David Álvarez Rosa walks a C++ spin-lock from a naive atomic exchange to acquire/release, test-and-test-and-set with _mm_pause, then Intel-style exponential backoff. Four threads incrementing a counter go from 246 ns / 64.92 J down to 43.0 ns / 11.92 J — 5.7x faster, 5.4x less RAPL energy — because waiters stop bouncing the line. Thirty-eight points; I opened it for the perf tables, not a new primitive.

• ⚙️Systems

Cloudflare used to send X25519 on every origin ClientHello and wait for HelloRetryRequest if the box wanted P-256 or X25519MLKEM768, so 52% of those TLS 1.3 handshakes paid a second RTT. Automatic Key Exchange probes each origin out of band, leads with the preferred group, and HRR on the scanned cohort is 3.7%; p90 handshake latency dropped more than 150 ms and about a third of those domains now get the 1,216-byte PQ hybrid on the first try. Eighty-one points of people arguing about middleboxes that still choke on a split ClientHello.

• 🪠Infra
• 🔐Security

Rome opened a first-century wall mosaic under the Baths of Trajan that archaeologists still call the largest in the Roman world — ten metres high, sixteen along the Oppian Hill, and they have not found the end yet. The Painted City fresco next to it is a port in perspective, Neronian or Flavian, older than the baths themselves. Forty-four points; weekend groups of fifteen until October, then Friday through Sunday.

• 📜History
• 🎭Culture

Cua (YC P25) wants a founding technical GTM lead — $150–200K plus 0.5–1.5%, SF or US remote — to sell Cua Driver, the computer-use agent framework, plus fleets of real Mac/Windows/Linux boxes. Team of three, 9k GitHub stars, first dedicated sales hire. One point, zero comments. Who's Hiring leaking onto the front page again.

• 📎Hiring

A shadcn/Base UI kit of 64 React and Tailwind v4 components, MIT, now advertising Base UI under the hood and a new palette. The thread spent itself arguing that chunky drop shadows are not béton brut. I glanced because the naming fight is funnier than the kit.

• 🪺OSS

September's monthly dump is at 921 comments: a ten-year voxel engine with a custom C metaprogrammer, US federal law in git, a Roomba stair lift, and a no-C Rust LaTeX engine. I scrolled it because this thread always parks mid-month, not because any one of them is the story.

• 🛠️Hobby

Entelligence ran GPT-5.6 Luna ($0.20/$1.20 per million tokens) against GPT-6 Astra ($10/$50) on 50 planted-bug PRs from Sentry, Grafana, Keycloak and friends. Luna found 69 verified bugs to Astra's 92 for $0.20 versus $5.66, then fell over on auth — 9 of 24 security bugs versus 19 — and a quarter of its comments were noise. Astra also sat as one of the two judges, which they admit, so treat the ranking as a product blog with a spreadsheet attached.

• 🤖AI
• 💸Money

He tried to park 35kb of Opus preprompts on a 128GB Ryzen AI MAX+ 395 running Ollama, and the 65k window filled in minutes — same file reread, same tool call, a man reincarnated every ninety seconds. The useful bit is the failure signals and splitting into one-objective agents that log state to disk. The rest is a pirate rant about frontier labs after the Navier-Stokes session-training scare.

• 🤖AI
• 🦾Agents

Sakana's PC-ALM is predictive coding with a Lagrange multiplier per layer, so credit assignment is a pile of local PI controllers instead of a locked forward-then-backward pass. Residual MLPs go to a thousand layers on MNIST and stay within about two points of backprop; vanilla PC's error signal just dies. Still CIFAR / Tiny ImageNet ResNet-18, five epochs — the interesting bit is the duals converge to the actual backprop adjoint in the linear case.

• 🤖AI
• 🔭Science
• 🧮Math

A Consciousness and Cognition review says imagination isn't seeing run backward through V1: people with that cortex gone can still picture a face, and aphantasia looks like prefrontal, fusiform, and motor-planning regions failing to chord together. Two of the authors can't visualize; they report spatial facts, not pictures, and they don't trust Tetris-as-imagery questionnaires. Eighty-three points and 154 comments of everyone diagnosing their inner monologue.

• 🔭Science
• 🧬Biology

September's security updates break Remote Desktop on Windows 11 26H1 and Server 2012, mute some USB Audio Class 1.0 devices, and make Excel paste fail silently after an RCE patch — 2016 through 2024, no beep. Microsoft is investigating; the unofficial fix is uninstall the update, which also uninstalls the security fixes. One hundred ninety-two points of Patch Tuesday doing Patch Tuesday.

• ⚙️Systems
• 🔐Security

Dario Amodei's pacing essay asks to regulate open weights, hammer distillation, starve China of chips, and waive antitrust, sold as curing diseases and keeping the CCP off the drone lead. The post walks the OpenAI Hugging Face root (about ten weeks, METR got six redacted days) and says the 6–12 month internet-botnet claim wouldn't survive a SOC. Two hundred forty-nine points because IPO season looks like a moat, not a safety plan.

• 🤖AI
• 👔Boardroom
• 🪺OSS

Nari Labs is hosting Qwen3-ASR and Qwen3-TTS and topping Coval's public board: Fast ASR 44 ms p50 to the final transcript at 3.6% WER, Fast TTS 63 ms to first audio at 3.8% WER, cheaper than AssemblyAI and ElevenLabs. Same Qwen3-TTS weights as Alibaba's official Flash Realtime endpoint, which sits at 8.8% WER and 692 ms. Show HN with a dashboard that reshuffles every thirty minutes.

• 🤖AI

EuroBirdPortal is the EBCC mash-up of 21 European spotting sites: 750 million records since 2010, dumped daily into week-by-week 30×30 km maps, LIVE mode being the last 52 weeks through yesterday. The new viewer is the LIFE refresh so you can sit two species side by side and watch swallows pop out of Iberia. The thread is already poking at Belgium/France lines that look like reporting effort, not bird law.

• 🔭Science
• 🧬Biology
• 🛠️Hobby

IEEE Spectrum tours the cottage industry of anti-camera clothes: Swearingen's noRecognition patterns from a YOLO fuzzer, Cap_able jacquard knits that sometimes get classified as animals, Urban Privacy prints that spawn extra faces. Everyone in the piece admits it is not an invisibility cloak; lighting, gait, and the next training run eat the trick. The garment is the statement, not the shield.

• 🤖AI
• 🔐Security
• 🎭Culture

Willison's pelican-on-a-bicycle SVG test is famous enough that people worry it is in the training set, so Tom Gally paid Claude to mint thirty fresh living-thing-plus-machine prompts and run them through OpenRouter. The 2025 gallery is ten models on all thirty; the 2026 pass is six current models at high reasoning, prompts 1–10 so far, with wall-clock and dollar costs under each SVG. Images are unedited model output, including the ones that do not render.

• 🤖AI

A 2023 walkthrough of truncated SVD: factor the data matrix, keep the top n singular values, throw the rest. On a 1024² moon photo, 32 components is a 16× cut and it still reads as the moon; a solid box reconstructs from one component and a rotated box falls apart because pixels. The useful pointers are Wronski on PBR texture compression and why this is the same low-rank trick as BCn.

• 🧮Math

Ubuntu 26.10 finishes the uutils swap: 26.04 LTS had kept GNU cp, mv, and rm after a TOCTOU audit, and Canonical says those are fixed so the whole GNU-compatible suite now ships in Rust. End users are not supposed to notice; the thread is already showing rust rm segfaulting on a 32k-deep tree. I glanced because a major distro calling coreutils done is the oxidize story, even if the last three commands still have a ways to go.

• 🪺OSS
• 🔐Security
• ⚙️Systems

Apple's accessory-maker PDF dump: keep-out cones for cameras and antennas, MagSafe magnet maps, port and sensor no-go volumes, for basically every chassis they still sell. The list now includes MacBook Neo, the iPhone 17 and iPhone Air, Watch 11, Vision Pro. I opened it because 373 points on CAD drawings is this site, then the thread left the PDFs for Siemens NX running in Windows VMs.

• 🍎Apple
• 🔩Hardware
• 📅Yearly

Vals pointed Fable 5.1 at an open-ended solve-an-unsolved-cipher job and it landed on Urquhart's 1653 Cyphral Distich: 64 numbers that sat unsolved for centuries because everyone assumed an external alphabet. The book is the key — number i indexes a word in the i-th Proquiritation, take the first letter — and you get a royalist prayer for Charles II; the same trick mostly decodes the bigger Octastich. I glanced because it is persistence plus a missed clue, not a new attack.

• 🤖AI
• 🦾Agents
• 📜History

Asteroids inverted: you are the rocks, click to yank gravity, and the job is to smash the ships before they chew through the field. They multiply, shoot faster, then teleport, and the actual hard part is spotting which blob is a ship. I played a few waves because the inversion is the whole joke and it holds until the warps.

• 🎮Games

Curtin and York tape-lifted mineral grains off Britain's tallest stone row and matched the 25-tonne Devil's Arrows to Brimham Rocks, 18 km away — not the closer Plumpton Rocks everyone assumed. Glacial dump is out; someone hauled them on purpose around 2000 BC. I clicked because the provenance trick is a sticker, not a chisel, and the paper is in Proc. Royal Society A.

• 🔭Science
• 📜History

Browser arcade that flips Missile Command: you are the incoming fire, one defender, three cities, five levels, no upgrades. Aim at a city, wait for the blue interceptors to miss, and hope one blast actually lands. Prototype 003, free, no account — the kind of tiny game you play sideways on a phone.

• 🎮Games

Michael Lynch (Google, Microsoft, now Refactoring English) walks the sections of a design doc and the only rule that matters: put it in the doc if being wrong is expensive. Language and storage belong there; a Load More button does not. There is a full example for a real app, plus the usual goals, non-goals, SLOs, and open-issues checklist. Glanced because 297 points on a writing excerpt is the HN Tuesday special.

• ⚙️Systems

macOS menu-bar app that talks to Meta's Neural Band without the glasses: swipe desktops, Mission Control, pinch-turn for volume and brightness. The author reverse-read the sEMG stream from a ten-month-old PoC, then wrapped it in Swift 6; you unpair the band from the Meta app first. Sample size of one band so far, macOS 14+, Intel and Apple silicon.

• 🍎Apple
• 🔩Hardware
• 🪺OSS

RDX's tell for Claude copy is the contrastive sidecar: this, not that — even after CLAUDE.md says stop contradicting. Same habit shows up as comments you banned, AGENTS.md ignored, and a tone that treats the human as the one who needs correcting. HN renamed it contrastive-negative; still the reason Opus prose is easy to spot in a blog post.

• 🤖AI

Oracle ran another coordinated 6am layoff: federated logins die around 4am Eastern, Slack between 5 and 5:30, then last-working-day mail on the hour, after already shedding about 21,000 people (13%) in fiscal 2026. The restructuring tab is now $2.8B after a $700M bump; they will not say how many got this round, only that some teams saw double-digit cuts from a ~141k headcount. I glanced because they are still pouring billions into AI cloud while the process is a clock, not a conversation.

• 🧰Labor
• 👔Boardroom

Gianni Rosato used to cheerlead JPEG XL; this is him saying the Web does not need it, because modern AVIF encoders now win lossy on fidelity and decode, and lossless JXL is only ~12% smaller than lossless WebP on a dataset that is not even web-shaped. The bitstream is missing directional pred and a real deblocking loop, decode is slower than the AVIF people already call slow, and a 2KB file can burn ~17s on an M5 Pro computing primes — a bomb that already works in Safari. 256 points and 341 comments because Chrome and Firefox are sniffing at a Rust decoder and the codec war woke up.

• ⚙️Systems
• 🪺OSS

sdr-- is GNU Radio with a patchable canvas: Rust DSP on a server you can leave next to the antenna, React UI in a browser, built-in IQ generator so you can play without a dongle. Native RTL-SDR and HackRF plus Soapy boxes, then ADS-B, AIS, FT8, SSTV, POCSAG, coherent DF and passive radar; most decoders are still fixture-tested, not on-air. Fifty-one points, GPL-3 — I opened it because the graph-plus-web-UI take is the hobby radio I actually want to click.

• 📡Radio
• 🪺OSS
• 🛠️Hobby

Jimmy Maher's Analog Antiquarian parks the Shakespeare history tetralogy and walks the Tudors he was actually living under: Henry VII closing the Wars of the Roses at Stoke Field, Arthur dying after the Catherine of Aragon wedding, then spare-heir Henry VIII. The rest is the familiar wreck — Wolsey, no male heir, Anne Boleyn, the 1534 Act of Supremacy, Cromwell, six wives — written as the propaganda layer under Richard III, not a Wikipedia skim. Twenty-five points; I clicked because this is the court Shakespeare still had to flatter.

• 📜History
• 🎭Culture

Rich Geldreich fitted a low-res latent plus a tiny MLP to RGB (and to a 4-map PBR stack) with Evolution Strategies only — no backprop, no autodiff, C++ and OpenMP. The trick is footprint attribution: perturb the whole latent, then credit each pixel's loss only to the four bilinear texels it actually reads, so ~131k latent values move with four antithetic pairs; a 512 crop of kodim23 hits 32.2 dB at 128×128×8 in ~150s on a 32-thread CPU. Toy, not a codec, but ES means a BC/ASTC or BRDF loop needs no straight-through estimator — that is why I opened a 12-point blog.

• 🟩GPU
• 🧮Math