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TypeScript

Optional static type-checking for JavaScript.

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The only string in our alert email that nobody on our side wrote, and the four characters standing in front of it

The only string in our alert email that nobody on our side wrote, and the four characters standing in front of it

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6 min read
What the Gamepad API actually tells you about stick drift (with a working verdict

What the Gamepad API actually tells you about stick drift (with a working verdict

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3 min read
An AI agent read a Japanese novel as 208,953 replacement characters

An AI agent read a Japanese novel as 208,953 replacement characters

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3 min read
Our workspace runs 1,129 tests and the app people actually hold has 67 of them

Our workspace runs 1,129 tests and the app people actually hold has 67 of them

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7 min read
Twelve links chosen alphabetically on all 461 of our generated pages, and the 128 pages nothing else points to

Twelve links chosen alphabetically on all 461 of our generated pages, and the 128 pages nothing else points to

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6 min read
Building hldays #6: Names are harder than dates

Building hldays #6: Names are harder than dates

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7 min read
tanstack-fetch 2.0.0: A Smaller Core, WebSockets, WebTransport, and Type-Safe Streams

tanstack-fetch 2.0.0: A Smaller Core, WebSockets, WebTransport, and Type-Safe Streams

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6 min read
Type-safe, scalable WebSockets in Python: a FastAPI tutorial

Type-safe, scalable WebSockets in Python: a FastAPI tutorial

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9 min read
How we deliver voice only to people nearby in a 2D virtual office (SFU subscription permissions, not mixing)

How we deliver voice only to people nearby in a 2D virtual office (SFU subscription permissions, not mixing)

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7 min read
Prompt Caching: Your Prompt's Prefix Is a Cache Key

Prompt Caching: Your Prompt's Prefix Is a Cache Key

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4 min read
Your AI Agent Needs No Framework: A 200-Line TypeScript Harness

Your AI Agent Needs No Framework: A 200-Line TypeScript Harness

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11 min read
What Gemma 4 vision gets right about circuit sketches, and the validator that fixes the rest

What Gemma 4 vision gets right about circuit sketches, and the validator that fixes the rest

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6 min read
Our app has 601 serverless invocations a day and exactly one background task, and the task gets 1,800 seconds

Our app has 601 serverless invocations a day and exactly one background task, and the task gets 1,800 seconds

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6 min read
Our example env file documents 19 variables, the code reads 15 of them, and its longest comment describes a design we deleted

Our example env file documents 19 variables, the code reads 15 of them, and its longest comment describes a design we deleted

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6 min read
One capital letter turns /pricing into a login form, and /Sitemap.xml into a 404

One capital letter turns /pricing into a login form, and /Sitemap.xml into a 404

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7 min read
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