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Don't let the model write SQL: designing an MCP server around a semantic layer
Ask an LLM with a warehouse connection for last week's ROAS and you get an answer in seconds. It is confident, nicely formatted, and often wrong. The model doesn't know which attribution model your company reports with, whether "revenue" means gross or net, what counts as a new customer, or how…
LLM Rate Limits: Your Retry Loop Is the Easy Part
The first time an LLM feature hits real traffic, the logs fill with 429s and somebody writes a retry loop. It usually looks like the one from the last REST API they integrated: catch the error, sleep, try again, maybe double the sleep. It ships, the errors drop, and everyone moves on. Then the bill…
TypeScript 7.1 Beta: Restores the Compiler API and Makes Vue and Svelte First-Class
TypeScript 7.1 Beta, announced October 20, 2026, restores the compiler API removed in 7.0, now split into separate entry points. It adds content mappers, letting tools like Vue check non-standard files. One Vue project's type checks fell from 14.19 to 3.10 seconds. An editor issue remains open, and…
Data Access Testing With @testcontainers
Testing data access code has always been awkward: unit tests want to be fast and isolated, and a real database is neither. With Docker and @testcontainers you can spin up a throwaway Postgres inside your Vitest suite, push your Drizzle schema into it, and verify that your real insert and query code…
Chrome Opens Trial for the Email Verification API: Letting Sites Verify Without Sending Emails
Google has opened a Chrome origin trial for the Email Verification API, a WICG proposal that lets the browser confirm email ownership without sending a message. Gmail is the first provider. Developers add form hints and validate a signed token server-side. Commenters question the privacy benefit…
Angular 20 End of Support Nov 28, 2026: Node & TS for v21
Angular v20 LTS ends November 28, 2026. The v21 and v22 upgrade paths, the Node and TypeScript versions each needs, and what to check first.
How to Build an AI Agent Harness from Scratch in TypeScript
Many AI agent tutorials start with a language model, give it a few tools, and run a loop until it produces an answer. That's enough to demonstrate tool calling, but it leaves the interesting engineeri
Structured Output with TanStack AI
Part 2 of this intro to TanStack AI covers structured output: constraining the model's response to a Zod schema, then streaming that JSON in and rendering it while it's still incomplete.
How to Detect Operational Drift Before It Becomes an Incident
In my previous article, I explored operational conformance: how to evaluate whether observed evidence satisfies an operational specification. That gives us a useful point-in-time question: Does the s
The Unreasonable Effectiveness of Constructive Data Modeling
Alexis King (tweet): The type systems provided by mainstream languages have grown vastly more sophisticated, but how much value does that complexity actually provide programmers in practice? I would like to make the case that it is somewhat less than one might think. While at times convenient…
Running Doom in TypeScript with Dimitri Mitropoulos
Doom has seemingly been ported to every electronic device imaginable, including picture frames, lamps, and coffee machines. The meme of “it runs Doom” has become so widespread that it spawned the r/itrunsdoom sub-Reddit. Recently, Doom made headlines again for being ported to TypeScript. The…
