The Daily Index — Monday, March 2, 2026 · TLDR Index

Across today’s newsletters

Today’s Index

TLDR

HOW TALKS BETWEEN ANTHROPIC AND THE DEFENSE DEPT. FELL APART

Emil Michael, the Department of War's chief technology officer, had been negotiating with Anthropic for weeks on a $200 million AI contract. The talks had hit an obstacle as Anthropic would not allow its technology to be used for purposes such as the surveillance of Americans. Michael demanded that Anthropic's CEO, Dario Amodei, get on the phone to discuss the issue, but he was told Amodei was in a meeting with his executive team and needed more time. Michael had been hammering out a deal with OpenAI on the side, so the Department of War designated Anthropic as a security risk and cut it off from working with the government.

links.tldrnewsletter.com · 8 min

TLDR AI

OPENAI AGREEMENT WITH THE DEPARTMENT OF WAR

OpenAI announced a classified deployment agreement with the US Department of War that included explicit red lines against mass surveillance, autonomous weapons control, and high-stakes automated decision-making.

links.tldrnewsletter.com · 4 min

TLDR Dev

CREATING QUERY ABSTRACTIONS

Custom hooks are the wrong way to abstract useQuery, as they lock you into one hook, get messy with TypeScript generics, and can't be used outside components. Instead, use queryOptions to define your key and fetch function once, then spread it into whatever hook you need (useQuery, useSuspenseQuery, etc.) with per-usage options on top.

tkdodo.eu · 8 min

TLDR InfoSec

CANADIAN TIRE 2025 DATA BREACH IMPACTS 38 MILLION USERS

A 2025 e‑commerce breach at Canadian Tire exposed data from over 38 million accounts, including names, contact details, hashed passwords, and partial card numbers, with under 150,000 records containing full dates of birth. Financial systems and in‑store transactions were reportedly unaffected, but 42 million records were added to Have I Been Pwned.

securityaffairs.com · 2 min

TLDR Crypto

CRYPTO TRADERS HEDGE IRAN WAR RISKS WITH TRADING ON HYPERLIQUID

Following coordinated US-Israeli missile strikes on Iran, traders migrated to Hyperliquid to hedge commodity exposure via perpetual futures, with oil-linked contracts gaining 5% to $70.6/barrel, gold up 1.3% to $5,323/oz, and silver leading 24-hour volume at $227M on a 2% move to $94.9/oz. The structural advantage driving activity was Hyperliquid's 24/7 availability, allowing real-time position-taking while traditional commodity markets remained closed over the weekend. Broader crypto markets reflected the risk-off sentiment, with BTC declining to $63,000 during the strikes, while Polymarket recorded over $500M in US-Iran war prediction bets, marking a new volume record for the platform.

finance.yahoo.com · 3 min

TLDR

SPACEX WEIGHS CONFIDENTIAL IPO FILING AS SOON AS MARCH

SpaceX may file for its initial public offering as soon as this month. The firm expects to submit its draft IPO registration to the US SEC in the next few weeks, keeping it on track for a June listing. It could be seeking a valuation of more than $1.75 trillion. The listing could raise as much as $50 billion.

links.tldrnewsletter.com · 4 min

TLDR

GOOGLE QUANTUM-PROOFS HTTPS BY SQUEEZING 15KB OF DATA INTO 700-BYTE SPACE

Google has implemented a new Merkle Tree Certificate system in Chrome. It uses Merkle Trees to provide quantum-resistant assurances that a certificate has been published without having to add most of the lengthy keys and hashes. Cloudflare is enrolling roughly 1,000 TLS certificates to test how well the system works. The Internet Engineering Task Force standards body has formed a new group to develop a long-term solution for generating the distributed ledger.

arstechnica.com · 3 min

TLDR

‘WORLD'S LARGEST BATTERY' TO PROVIDE 100-HOUR IRON-AIR STORAGE FOR GOOGLE DATA CENTER

Google is building a new data center in Pine Island, Minnesota, that will be powered by 1.9 gigawatts of clean energy from wind and solar. It will use a 300-megawatt iron-air battery with a 30-gigawatt-hour capacity and 100-hour duration. Iron-air batteries store electricity by making rust and then reversing the rusting process to release energy when needed. While these batteries are heavier and less efficient than their counterparts, they are almost three times cheaper. Google will fund the installation of many smaller batteries across the grid to increase power capacity and make the system more reliable.

interestingengineering.com · 4 min

TLDR

LESSONS FROM BUILDING CLAUDE CODE: SEEING LIKE AN AGENT

Designing tools for models is as much of an art as it is a science. It depends heavily on the model, the goal of the agent, and the environment it's operating in. Developers need to experience often, read outputs, and try new things. This post provides a useful framework for designing agents with tools that are shaped to their own abilities.

links.tldrnewsletter.com · 8 min