
Entrepreneur & engineer. Founder @gratitude_plus. Previously building at @thrive @rapidsos @nytimes @community
New York
Joined May 2012
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Daniel Shaffer retweeted
Decision models could damage Anthropic's business.
You don't need Opus 5.5 when you can instantaneously run hundreds of natural language assertions on agent output...
... at a fraction of the cost.
This approach is being streamlined via Traits.
traits.sh/
Daniel Shaffer retweeted
You ask your agent to rename `parse` to `decode`, but it keeps the old file name and aliases the import:
`import { decode as parse } from "./parse.ts"`
No lint rule can determine that this is slop.
System one models can...
Daniel Shaffer retweeted
Effect-native x402.
Schemas, chain-agnostic adapter system, fetch/http layers, extension support and more coming soon!
Please try it out and join the Discord!
crosshatch.dev
Daniel Shaffer retweeted
On July 10, 2008, Apple launched the App Store.
#InternetHistory
Daniel Shaffer retweeted
We've heard more and more cases of developers ending up on the wrong side of Apple for using non-IAP payments in their apps. There is a lot of confusion and some ambiguity right now in the US on what is and isn't allowed following the December 2025 appeal of the Epic v Apple case.
Our basic understanding:
1. Linking to an out-of-app web browser from your app that lets US users purchase - 100% OK
2. Linking to an in-app web browser that lets US users purchase - Unclear if this is ok, but we've seen some reviewers ok with it some not, benefits marginal
3. Having a button that uses an in-app, non-StoreKit (Stripe or others) to complete via Apple Pay - Very not ok, some people have been getting through, but pretty sure this is asking for a rejection or a ban
This is a somewhat probabilistic understanding as every submission to the App Store is a bit random, and we don't have direct channels with app review day to day, but we believe that right now, #1 is the only 100% safe path.
There are other vendors, some partners of ours, who are giving misleading guidance. We're working with these partners to try and keep everyone in the clear, but it's a bit of whack-a-mole.
If in doubt, play it safe. It's really really not worth the few percentage points margin to risk your main channel and main partner.
Daniel Shaffer retweeted
"First was the mouse. The second was the click wheel. And now, we’re going to bring multi-touch to the market. And each of these revolutionary interfaces has made possible a revolutionary product — the Mac, the iPod and now the iPhone." - Steve Jobs, MacWorld, 2007
Daniel Shaffer retweeted
Introducing abtest.design, a curated collection of A/B test results from best-in-class apps.
Nice feature! @gratitude_plus
Gratitude Plus makes social networking positive, private and personal tcrn.ch/3Uy9iob
Daniel Shaffer retweeted
This book is a 100 page biography of the human species
A few lessons of history:
1. In the end superior ability has its way.
2. History reports that the men who can manage men manage the men who can manage only things, and the men who can manage money manage all.
3. Every advance in the complexity of the economy puts an added premium upon superior ability.
4. All technological advances are merely new means of achieving old ends.
5. The influence of geographic factors diminishes as technology grows.
6. Economic development specializes functions, differentiates abilities, and makes men unequally valuable to their group.
7. In every age men have been dishonest and governments have been corrupt.
8. Competition is not only the life of trade, it is the trade of life.
9. We cooperate in our group in order to strengthen our group in its competition with other groups.
10. War is a nation's way of eating.
11. War is the ultimate form of competition.
12. Leave men free and their natural inequalities will multiply.
13. History shows little alteration in the conduct of mankind.
14. The initiative individual—the "great man," the "hero," the "genius"—regains his place as a formative force in history.
14b. At times his eloquence, like Churchill's, may be worth a thousand regiments; his foresight in strategy and tactics, like Napoleon's, may win battles and campaigns and establish states.
14c. These initiative individuals are effects of numberless causes, and causes of endless effects.
15. The imitative majority follows the innovating minority and this follows the originative individual.
16. Even the skeptical historian develops a humble respect for religion, since he sees it functioning, and seemingly indispensable, in every land and age.
17. History remains, at bottom, a natural selection of the fittest individuals and groups.
18. Every advance in the complexity of the economy puts an added premium upon superior ability.
19. Our capacity for fretting is endless.
20. If a man is fortunate he will, before he dies, gather up as much as he can of his civilized heritage and transmit it to his children.
21. The final test is the ability to survive.
New episode on The Lessons of History is available now!
Daniel Shaffer retweeted
5 habits that are killing your productivity:
1. You don’t wake up early (Marcus Aurelius)
2. You focus on what’s outside your control (Epictetus)
3. You’re in the wrong crowd (Marcus Aurelius)
4. You don’t know how to say “no” (Seneca)
5. You think you’ll live forever (Seneca)
New review for @gratitude_plus today. I love reading ones like these. It makes all the tough days worth it.
Gratitude Plus was mentioned in the NYTimes!
“More than 100 respondents said that they use journals or apps like Day One, Gratitude Plus and Flavors of Gratefulness to keep track of the good things in their lives.”
Download: gratitudeplus.app.link/downl…
nytimes.com/2023/07/07/well/…
For my TypeScript and crypto friends: check out Capi, a new TypeScript framework for crafting interactions with Substrate chains from @Polkadot @harrysolovay - good work 🎉
docs.capi.dev/blog/2023/06/2…
Daniel Shaffer retweeted
It’s like every technology Apple has produced was prepared for Apple Vision. Operating systems, chip design, graphics, spatial audio, cameras, networking, payments, computer vision, and a massive developer ecosystem. Pretty impressive vertical integration.
Daniel Shaffer retweeted
Welcome to the era of spatial computing with Apple Vision Pro. You’ve never seen anything like this before!























