Calls, puts & mise en place

Appel & Mise

Vol. IFriday, October 2, 2026 · 66° & clear on the UWSThe daily, for Jeremy Ettlinger

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The lede

Using Opus 5.5 to discover a new eyewitness record of the dodo

Benjamin Breen, Res Obscura · made the Sunday

The method is the thing, and it is unglamorous enough to copy: take a real research question you already have standing, find a large well-edited corpus (here the GLOBALISE archive of Dutch East India Company records), embed it, use semantic search to surface candidates, and let agents read the hits in several languages and rank them for a human. What came back was a 1615 ship's log from the Wapen van Amsterdam noting a crew that 'caught many tortoises, dodos, and some geese and parrots' — filling a documented gap in the dodo timeline — plus a 1638 reference to the extinct red rail that a French scholar mistranslated as 'partridges' in 1890 and nobody re-checked. Breen is just as clear about the failure mode: left alone, a dozen agents drill into Inca khipu and produce findings he has no way to evaluate, because models are bad at judging significance and cannot ask the right question in the first place. The conclusion is the one worth carrying into your own work — the bottleneck moves off the finding and onto the attention of the few people qualified to tell you whether it matters.

AI & Agents

Dan Harrison, turbopuffer

RIP, vector database

turbopuffer is tearing out the design decision it was built on: the ANN index has been the primary index since v1, every document keyed by its cluster-and-local address, and that worked beautifully for vector search on object storage and increasingly badly for everything else customers started doing with it. The write amplification is the line to remember — because SPFresh rebalances clusters to protect recall, and the document body and its inverted indexes all hang off the vector's address, updating one vector can move hundreds of attributes. Worth following as a public rebuild of a storage layer with Cursor, Notion and Linear's sync engine already on top of it, and as the clearest sign yet that 'vector database' was a phase rather than a category.

Cloudflare

Introducing Clef: our open-source decision models, and new RL fine-tuning platform

The interesting claim is the category, not the benchmark table: a decision model returns typed, bounded, probability-weighted answers cheaply and consistently, which is what you actually want at the branch points of an agent workflow where an LLM's open-endedness is a liability rather than a feature. Cloudflare's own example is concrete — Clef classified a domain in 2.2 seconds including fetch and render, against 4.7 seconds for its fastest general model, which returned two categories instead of a distribution. Apache 2.0 on Hugging Face, Jev-API compatible, hosted on Workers AI, with RL fine-tuning alongside, so the experiment costs an afternoon rather than a procurement cycle.

Engineering & Leadership

Paul LaPosta, LeadDev · made the Sunday

Your error budgets don't know AI exists

The scenario is uncomfortably recognisable: a consequential change fails, rollback is clean, the SLO never moves, and in the after-action nobody can say why it broke — they can produce the ticket, the approval chain, the passing tests, everything except an explanation. LaPosta's framing is that an error budget prices failure but silently assumed the collateral behind a change was human understanding, and AI has made producing a change cheap without making understanding cheap. The practical test is the best part and costs nothing: talk to the team that owns your most critical service without the engineer whose name is on every review, and see whether the rest can explain what was changed, what alternatives were considered, and what risk was accepted. He explicitly warns off the obvious bad answer, which is inventing a comprehension score.

Gergely Orosz, The Pragmatic Engineer

The Pulse: Firebase's global outage & poor handling by Google

A backend change crashed the Firebase iOS SDK, which took down every app using Firebase analytics for somewhere between two and six hours, and Google neither updated the status page nor published a postmortem — from the company whose incident-management writing half the industry cribbed from. Filed in the same issue: Vercel's AI gateway now sees 60% of model spend going to open-weight models, and a theory about the CTO and VP Engineering exodus that is not founder mode but something more awkward, namely people who love building software deciding they can do it alone again.

Web & Product Craft

Rob Sutter, Cloudflare

Introducing Workers KV Instant — powered by Quicksilver

Quicksilver is the key-value store nearly every request to Cloudflare already touches, and after years of asking, customers can finally put data in it: same KV API, 1.62ms p99 reads against classic mode's 287ms, and 99% of writes replicated to 300-plus locations in about 250ms. The pricing is where the shape of the thing shows — reads are 60% cheaper than classic KV, and storage is $100 per megabyte per month with writes at ten cents each and one write per namespace per second, which is a polite way of saying this is for flags, routing tables and settings you read on every request and change twice a week. No metadata, no pagination, 10,000 keys, private beta; the honest read is that Cloudflare has priced a config store rather than a database, and priced it so you cannot mistake it for one.

New York & the Table

Nadia Chaudhury, Eater NY

This New Restaurant Brings the Amazon Rainforest to the Lower East Side

Vitor Mendes went back to Brazil after his father died, travelled, and came home convinced that the Brazilian cooking New York knows — rice, beans, barbecue — had skipped the part that matters, which is cassava and everything made from it: a dozen flours, tapioca, and tucupi, the fermented juice he now cooks almost everything in. Iara opens tonight on Allen Street with a moqueca in dende oil and tucupi, tapioca fries under the picanha, a martini made with tucupi, and a dessert built on warm cassava coconut cake and tonka toffee. For anyone who finds the ingredient more interesting than the cuisine label, this is the better kind of opening — a menu organised around one root rather than one country.

Diversions

Paulina Borsook, Literary Hub

A Prophetic Classic About the Dangers of Tech is Back in Print

Borsook's Cyberselfish catalogued Silicon Valley's libertarian self-mythology in 2000, sold badly, went out of print within a few years, and sat at five dollars used for two decades. Her account of its resurrection is a small, precise story about how things surface now: used prices creeping from five dollars to over two hundred, graduate students emailing to ask for a copy she could not give them, no electronic version left anywhere because the publisher had vaporised them all, and a stranger's LinkedIn appreciation going viral in 2025 and setting off the chain that ended in a Tin House reissue this fall. The line she lands on is the uneasy one — she is not sure she would have the courage to write it in 2026.

Loose Change

The Inner Ring

Shimano Bicycle Museum Review

A corporate museum that declines to be about the corporation: in Sakai, fifteen kilometres south of Osaka, Shimano has built four thousand square metres of glass and steel and filled it with bicycles rather than with itself. You enter past a wall explaining that the Japanese word for bicycle, jitensha, means 'wheels rotated by oneself,' then walk a darkened hall of machines under spotlights from hobby horses forward, into a bright room where Freddy Maertens' steel Flandria sits on a low stage with nothing between you and its Ishiwata tubing decal. The humdrum is given the same lighting as the heroic — a Swedish postal bike on studded tires, a Cannondale still caked in dust from a 55,000km ride, an Olympic road bike with its crash dents — and one stand takes a race bike apart into all 3,200 of its pieces, counting every chain pin. Shimano's own origin gets a sentence in passing: gun blacksmiths in a sword-making city started repairing imported bikes, and the company's first product was a freewheel, which is also why a quarter of its revenue now comes from fishing reels. The top floor holds the Dura-Ace cases from 1973 onward, with four empty displays waiting. Admission is about three euros and there is no gift shop.

The Back Page

Leander Schaerlaeckens, The Guardian · made the Sunday

The ultra-rich face … accountability? Manchester City and Clippers verdicts show it's possible

One column for both halves of this page: the Clippers caught paying Kawhi Leonard $28m off the books through a no-show sponsorship job, docked five first-round picks and $30m with Ballmer suspended for a year, and City found guilty of a hundred-plus charges spanning 2009 to 2018 plus four years of obstructing the inquiry. Schaerlaeckens tracks the stages of billionaire accountability from total denial to the non-apology, notes that the Clippers case was broken by Pablo Torre's podcast rather than by the league, and sets both beside the cases that went nowhere — Kraft, and Dolan, whom Torre also reported on and who will probably never feel a thing. Mark Cuban's contribution to the record, before the findings landed, was 'I'm on Team Ballmer. Steve isn't that dumb.'

Around town

Mon Oct 5 – Sun Oct 11

AI Week NYC — Fall Edition

Venues across the city

A week of AI events across New York, organized loosely by Pulse NYC — anyone can host, approved events land on the official calendar, and Gary's Guide is keeping the running list. Mostly free, mostly evenings, and the useful way to read it is as a menu rather than a conference: pick the two sessions that touch something you are actually building and skip the rest.

professional

Wed Oct 7 · 7:30pm

Revelry: The Lovestruck Balladeers

Leonard Nimoy Thalia at Symphony Space, 95th & Broadway, Upper West Side

Ninety minutes of swing standards, country rags, Mexican waltzes and mandolin pieces, played by people who clearly enjoy the gear-change between traditions. Twenty-five dollars and a ten-block walk, in the small theater rather than the big hall.

casual

Sun Oct 11 · 7:30pm

Greek Theater on Screen: Sophocles' Electra

Leonard Nimoy Thalia at Symphony Space, 95th & Broadway, Upper West Side

A world-premiere screening of Electra staged as dark European cabaret — the revenge tragedy played as political allegory rather than myth, in Greek with subtitles, a hundred minutes. Director Dimitri Tarlow stays for questions afterward, which is the part that makes it an evening rather than a film.

casual

Thu Oct 15 · 7:00pm

AI Engineers — Poker & Game Night

25 Kent Ave, Williamsburg

Four poker tables, board games, Smash Bros and Mario Kart, pizza and drinks, for engineers and founders building AI companies — the rare industry evening with no panel attached. Free to attend; a poker seat is a hundred-dollar buy-in and first come at check-in. Registration asks for your title and whether you are hiring, which tells you honestly what the room is for.

professional

Fri Oct 16 · 6:00pm

Agentic Security NYC, during BSides week

Venue announced on registration, Manhattan

Practitioners only, no slides, Chatham House rules — a small room of security engineers and leaders who are already running agents in production, arguing out a handful of deliberately uncomfortable questions. The best of them: who in your org actually has the authority to say no to an agent going to production, and could you prove what an agent did last week if someone made you. Second run of this; the first was in August.

professional

Quote of the day

“The people shortening them will increasingly be people who were simply curious.”

— Carter Church, on the world's lists of unsolved problems

On this day

October 2, 1925 — in a Soho attic, John Logie Baird transmits the first recognisable moving television picture: the head of a ventriloquist's dummy called Stooky Bill. He then goes downstairs for the office boy, William Taynton, who becomes the first human being ever televised, and who has to be paid to sit still under the lights.

The puzzle corner

The Mini · Wordle · Connections

Nothing from the Nuxt or Vue camps worth the counter space today, so Web & Product Craft runs short rather than padded — the one Cloudflare post earns the room.