Daily TEA – The Loop That Prompts Itself

Claude Code that prompts itself, frozen raises funding AI, Cash App’s magic wand, Tether’s gold rewards card, and a surgery-free pacemaker

Hello, dear TEA-mates! Here is what you need to know today.

1. 🫀 MIT’s Ultrasound Sticker Steadies the Heart Without Surgery

MIT engineers have built a noninvasive pacemaker that steadies the heart with ultrasound instead of surgery. The prototype is a sticker about the size of a postage stamp, wired to a pocket-sized box of batteries and electronics. It runs on sonogenetics: a one-time genetic tweak makes heart cells respond to ultrasound, and tiny transducers then send waves that trigger the ion channels behind each contraction. Led by professor Xuanhe Zhao with first author Chen Gong, plus collaborators at USC, Harvard, and UCLA, the team tested it on engineered human cardiac cells and in rats. Roughly 3 million U.S. adults live with implanted pacemakers today, all of which require surgery and direct contact with the heart. The study ran in Nature Biomedical Engineering on June 2, 2026, and the next goal is a single sticker that both images and stimulates the heart. (Read More)

🫖 TEA For Thought: “Portable hardware for health is the future, not just for general wellness but for specific diseases. After all, we need something to help us collect the data to upload a human!”

2. 💸 Teradata Tells Staff: No Raises This Year, the Budget Is Going to AI

Teradata, a cloud-analytics firm with about 5,100 employees, told staff in a January 2026 internal memo not to expect an annual salary raise this year, redirecting the compensation budget toward AI investments, according to Business Insider. The company casts autonomous AI and knowledge tools as the foundation of its next era. The memo drew attention because regular merit raises were frozen while the executive team still received increases. Steve McMillan is the president and CEO steering the shift. The decision became a flashpoint in a broader 2026 debate over how companies are reprioritizing payroll toward AI spending. (Read More)

🫖 TEA For Thought: “The money has to come from somewhere, so it is understandable. But with inflation, if your salary stays the same every year, you are actually earning less, because your purchasing power keeps shrinking.”

3. 🪄 Cash App Turns Tap-to-Pay Into a $25 Magic Wand

Cash App has launched a $25 tap-and-pay device shaped like a magic wand, inspired by a social trend of people hiding contactless cards inside homemade wands. The wand links to the Cash App Card and works anywhere Visa tap-to-pay is accepted, with no minimum balance, instant spend alerts, and the option to lock or deactivate it from the app if lost. Built by Block (Cash App’s parent), it went on sale Thursday, June 4, 2026, with more tag types, limited-edition drops, and permanent versions due by summer. Block hardware lead Thomas Templeton said the aim is to make payments visible and social, unlike invisible digital wallets and buried physical cards. The push targets Gen Z, following Cash App’s teen accounts and kids’ debit cards. (Read More)

🫖 TEA For Thought: “Imagine a marketplace for customized wands. This is cute!”

4. 🪙 Tether and Fasset Launch a Gold-Backed Rewards Card

Tether has teamed up with digital bank Fasset on a Visa rewards card tied to XAUT, its gold-backed token. Cardholders pay in fiat at any Visa merchant and earn up to 6% cashback in XAUT, with an automatic round-up that invests spare change into tokenized gold and rewards deposited in real time to a Fasset wallet. XAUT and Tether’s USDT can be converted to fiat at the point of sale. XAUT carries a market cap near $2.6 billion and is backed by about 24 tons of physical gold, inside a tokenized-gold market now worth over $5.3 billion. Tether has committed up to $1 million in XAUT rewards. CEO Paolo Ardoino said gold has long been a store of value, not a medium of exchange, and that this changes that. Fasset, which operates across Asia and Africa, is targeting emerging markets. (Read More)

🫖 TEA For Thought: “Tether is really doing something here.”

5. 🔁 Claude Code’s Boss Now Writes Loops, Not Code

In a WorkOS-hosted Acquired Unplugged talk, Anthropic’s head of Claude Code, Boris Cherny, laid out how AI is reshaping software work. He said Claude Code went from writing 10 to 20% of his code to replacing his editor entirely, and that he uninstalled his IDE after not opening it for a month. Instead of prompting by hand, he now writes loops, automated workflows that prompt Claude and decide what to build next, shifting his job from coding to orchestrating agents. He shared internal Anthropic figures: per-engineer productivity up 200%, over 90% of the Claude Code team’s code now written with Claude Code, and new-hire ramp-up down from weeks to about two days. He called it the golden age of the generalist, where designers, chiefs of staff, and finance folks all ship code. Asked what stays uniquely human, his answer was values: teaching the model to be good, the way we teach kids. (Read More)

🫖 TEA For Thought: “I am trying really hard to figure out how you create a loop where Claude Code keeps prompting itself, not just repeating the same prompt, but adapting based on errors and goals. Any insights?”

🛠️ Skill of the Day

The Self-Correcting Loop: make AI grade its own work against your goal and fix it before you ever see it.

You are my self-correcting assistant. I will give you a task and what a great result looks like. Do not show me your first attempt.

TASK: [describe what you want done]
DEFINITION OF DONE: [list 3 to 5 concrete things a great result must have]

Before you reply, work this loop silently:
1. Write a first draft of the task.
2. Score the draft from 1 to 10 on each item in the Definition of Done, and name the single weakest point.
3. Rewrite to fix that weakest point.
4. Repeat steps 2 and 3 until every item scores 8 or higher, or you have done 3 rounds.

Then show me only three things: the final result, the final scores, and one line on what changed between your first and last version. If you cannot reach an 8 on something, say so and tell me exactly what you need from me.

Paste into ChatGPT, Claude, or your tool of choice, and replace the bracketed bits. It is the hand-run version of the self-prompting loops in today’s last story.

TEAHEE Moment

Stay sharp, stay informed. See you Monday.

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