Calls, puts & mise en place

Appel & Mise

Vol. IMonday, October 19, 2026 · 52° & clear on the UWSThe daily, for Jeremy Ettlinger

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The lede

Anthropic's Scion is heavily inspired by Mononoke

sunshowers · made the Sunday

Last Wednesday's paper led with Anthropic's account of Scion, the version control system it built because git could not survive thirty thousand merges a day. The engineer who helped build Mononoke — Meta's source control server — read it and put two images side by side: Anthropic's description of how Scion uses 'derived data' to make blames cheap, and their own 2022 Oxide candidate materials describing how Mononoke uses derived data to make blames cheap. The post credits Sapling for 'hard-won lessons' and never mentions Mononoke, which the author calls borderline plagiarism while being explicit that they do not mind the design being copied — it was open-sourced precisely so the ideas would spread. The sharper point is the one every engineer handing architecture work to an agent should sit with: Mononoke is in every model's training set, so an LLM asked to design a scalable source control server will reconstruct it, and both Opus 5.5 and GPT-6 Astra name the resemblance immediately if you simply ask about prior art. The citation was one prompt away. That is the part that makes this more than a credit dispute — attribution has never been cheaper to produce, which is exactly why leaving it out now reads as a choice.

AI & Agents

Quanta Magazine

He wants AI benchmarking to be a science, not a dark art

Moritz Hardt, a Max Planck director, calls benchmarks 'the mistake that made machine learning' and argues they drove six decades of real progress anyway, mostly by luck. His diagnosis is mechanical rather than moral: the textbook holdout method says lock the test set away and use it once, the field published every test set to the internet instead, and once a benchmark sits inside the development loop a leaderboard stops measuring capability and starts measuring adaptation to the leaderboard. His salvage is worth stealing for internal evals — treat absolute scores as noise and trust only the ranking between models.

jrdsgl

If you don't run your own LLM proxy, how the fuck do you even know what's going on?

The argument underneath the title is an observability one: provider dashboards show you a spend number and a pretty chart, not the time series an engineer needs to make a decision, so put a proxy you control between your agents and every model you call. What you get back is the boring infrastructure you already expect everywhere else — one endpoint across providers, per-key logs of which harness called which model when and with what status, virtual keys so your main credential stops leaking into every tool, and the ability to swap providers without re-plumbing. The detail that lands: when a cache miss shows up mid-coding-session, the author can explain why in twenty seconds.

Engineering & Leadership

Karri Saarinen · made the Sunday

Someone behind the software

Linear's co-founder on why two teams with the same customers and the same tools ship very different products, and why so much software has started to feel messy — change is additive because adding a capability is far easier than rethinking one, so products become collections of abilities with no unified point of view. His worry about agentic work is organizational rather than technical: when each engineer runs a small private software factory, every change can be locally sensible and the whole thing still ends up assembled rather than shaped. Useful as the counterweight to throughput metrics when you are deciding what an engineering org is actually for.

Web & Product Craft

Cloudflare

Continuous accountability for Verified bots

Cloudflare splits identity from conduct — Web Bot Auth answers 'are you who you say you are,' and this is the second question — and starts scoring verified bots on observed behavior over time rather than at registration. The two opening signals are the ones any origin operator would pick: does the crawler's traffic match the robots.txt it was served, and does it actually slow down after an HTTP 429. Trust bands get published on Radar, which turns 429 from a response your framework returns by default into a signal somebody is grading your own crawlers on.

Lean Rada

Inline rendering with document.currentScript

Worth the archive trip: a script element can reach itself through document.currentScript and call replaceWith, so a one-line inline script swaps itself for its own computed value in place — no id, no querySelector, no template language. Alias it to a single character and you get something that reads like a template literal in plain HTML. Small, old and entirely unnecessary, which is roughly the definition of a trick you will remember next time a static page needs exactly one dynamic word.

New York & the Table

Eater NY

A pop-up bread bakery gets a forever Brooklyn home

Boots Bread, formerly Apt. 2 Bread, has gone from apartment pop-up to Kickstarter to a signed lease on Nostrand Avenue in Crown Heights, opening early 2027 with focaccia, milk breads and cinnamon rolls. The route from a home oven to a storefront almost never gets written down, and this one has receipts at every step. Also in the week's intel: Jeju Noodle Bar has opened a second Nolita location, and a Singapore and Hong Kong wagyu chef is taking a Tribeca room.

Diversions

Eric Gullichsen

William Gibson and the trademarking of Cyberspace™

The man who filed the trademark finally settles the oldest rumor on the web. In 1989 Gullichsen was building VR at the Autodesk research lab — a 386, two Matrox cards, an EyePhone, six to ten frames per second — when Autodesk applied to register 'cyberspace' and Gibson's lawyers wrote back. Timothy Leary, who had nicknamed the lab Cyberia, invented the retaliation story about Gibson trademarking 'Eric Gullichsen' and set it loose; Barlow and Rudy Rucker embellished it from there. The two men met a year later in a Barcelona hotel lobby, where Gibson delivered the line that should be taped above every platform team's desk.

Loose Change

Nautilus

Even dogs seem to experience the mysterious bouba/kiki effect

Show a person a round blob and a spiky star, offer the nonsense words 'bouba' and 'kiki', and they will match them the same way almost everywhere on earth — across unrelated languages, in cultures with no writing, and in people blind since birth handed 3D models. It is one of the strongest hints we have that sound and shape are wired together somewhere below language, which is why a study in Proceedings of the Royal Society B putting 51 dogs in a room between two screens and playing them the words is a genuinely interesting idea. If the effect is not ours alone, it is older than we are.

Quanta Magazine

Triplet of 'ghostly' galaxies hints at what dark matter is — and isn't

Sixty-five million light-years out, three dim galaxies have almost no dark matter, which should be impossible since dark matter is the scaffolding galaxies are supposed to form inside. The proposed explanation is lovely: two ordinary galaxies collided, their gas and dust snagged on each other and clumped into these pale offcuts, and their dark matter sailed straight through and kept going. That separation is the point — a substance that can be left behind by a crash is a substance, which is a bad day for theories trying to explain dark matter away as a quirk of gravity.

The Back Page

The Guardian

James and Carpenter lead Chelsea surge as sorry Spurs hit for six in WSL again

Chelsea 6-2 Tottenham at the Bridge, two each for Lauren James and Ellie Carpenter, and the pressure stays on Manchester City at the top. Tottenham genuinely held their own for a half, which somehow made the second worse — Nüsken and Hamano both scored off the bench. Bompastor's note afterwards was about substitutes arriving with clarity rather than hope, which is a coaching answer about preparation disguised as a compliment.

The Guardian

Premier League: 10 talking points from the weekend's action

The Monday morning survey of a weekend Chelsea had already banked at Everton on Saturday: Wirtz creating nine chances in Liverpool's comeback against Brentford, Calvert-Lewin heading in a fifth in ten for Leeds, and Carlos Baleba and Andrey Santos — a combined £115m of summer midfield — holding their own in their first United start together. Pierre Sage is the name under pressure after Brighton put five past Palace.

Golden State of Mind

Steph Curry tweaks ankle in open practice

A no-contact slip, a limp to the locker room, and a very quiet arena — the worst thing you can watch at an open practice four days before the season. Kerr came out afterwards and said right ankle, not knee, not serious, he will be fine. Filed here mostly so the sentence 'not the knee' is on the record before the week starts.

Around town

Thu Oct 22 · 6:30pm

The AI-ndustrial Revolution?

Puttery, 446 W 14th St, Meatpacking District

An actual debate rather than a panel: will AI make the average American's life better or worse in five years, argued by a Manhattan Institute labor economist against a Columbia lecturer who spends her days helping companies turn AI budgets into something that shows up in the numbers. The framing stat is the one worth the trip — only one CEO in eight reports AI both raising revenue and cutting costs, while 77% call it overhyped so far and underhyped for the decade ahead. Opener is an economics comedian, and the venue is a mini-golf bar, which keeps everyone honest.

professional

Thu Oct 22 · 6:30pm

Transit Techies: Swiftly and WalkNYC

NYU Tandon, 370 Jay St, Rm 1201, Downtown Brooklyn

Two talks, both of them about the unglamorous middle of a problem: Phil Cline on getting bus detours drawn and distributed to riders through GTFS, and Joe Puccio on WalkNYC, an app he built to track which blocks he had walked while trying to walk every block in Manhattan, now used by 25,000 people. Bring your own dinner. This is the kind of room where somebody explains a data standard well enough that you finally understand why your bus app lies to you.

casual

Now playing · Chapters 1–3 at 1:00pm & 6:30pm

My Undesirable Friends: Part II — Exile

Film Forum, 209 W Houston St, West Village

Julia Loktev's follow-up to Last Air in Moscow runs 355 minutes and follows the young Russian journalists she filmed before the shutdown as they scatter to Istanbul, Tbilisi, Prague, Vienna and New York and keep filing anyway, over four years, while being declared extremists. Streep and Poitras executive produced; Streep recorded an introduction that plays before Chapters 1–3. Eighteen dollars, twelve for members, and you do not need to have seen the first one.

casual

Mon Nov 2 · 11:00am (runs three days)

AI DevCon

Industry City, 33 35th St, Building 5, Sunset Park, Brooklyn

Three days on agentic coding past the single-developer stage — teams, codebases, platforms — with Nick Carmont from Anthropic's applied AI group, Geoffrey Huntley of Ralph Loop, and Steve Yegge. The pitch is 'things you can use on Monday,' which is either the whole point or an admission, and the 2026 framing is agents that are governed and standardized rather than clever. Thirty percent off with the code on the listing, and the Nov 3 virtual track is free.

professional

Quote of the day

“Autodesk is not the street.”

— William Gibson, in a hotel lobby in Barcelona, 1990

On this day

October 19, 1987 — Black Monday. The Dow falls 508 points, 22.6% in a single session, still the largest one-day percentage decline in its history. The part that gets left out of the anniversary coverage is the plumbing: order-routing systems backed up under volume nobody had provisioned for, quotes went stale, and for stretches of the afternoon the tape was reporting a market that had already moved. The crash was a capacity failure as much as a confidence one.

The puzzle corner

The Mini · Wordle · Connections

Two of today's items are the same story told from different ends: a model reconstructing a design it was trained on, and a founder watching products lose their shape as everyone gets their own private factory. The cheap part was never the building.