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API Articles

Hero illustration in which a single parcel carries two address labels for the same file, one written as file:///C:/tmp/entry-demo/cli.mjs and one written as C:tmpentry-democli.mjs, while the counter stamps them NO MATCH under the headline Same file, different spelling

Checking the Entry Point with import.meta.url in Node.js ESM, and How That Check Breaks

2026.08.31

One script, two machines. On Linux it does what yo…
An illustration of a gate at a fork in the road with the question 'Outlives the conversation?' written on it, and beyond the gate three signposts labeled 'Your Machine', 'Cloud', and 'CI'. The catchphrase 'One choice decides how far it runs' appears in the scene

How Should You Schedule Claude Code Runs?

2026.08.21

Every way to schedule Claude Code looks like it sh…
A wall clock and a strip of digital timestamp digits float side by side under the words 'Same Digits, Different Moment', hinting that identical numbers can point to different times

Why Timezone-less Date-Times Break Updates and Deletes When You Send Them as JSON

2026.08.17

When Updates and Deletes Started Failing Silently …
A row of doors at dusk, one lit with a readable sign and another left dark with no signal at all, with the words 'Which Door Explains Itself?' worked into the hero illustration

Whose Job Is It to Open That Door?

2026.08.07

This is the sixth and final part of a six-part ser…
A lighthouse beam sweeping steadily over a harbor at night while several paddle-wheel boats keep turning on their own, with the words 'Watched, not stopped' worked into the scene

How Does MCP Handle Work You Can’t Wait For?

2026.08.07

This is part 5 of a six-part series called “…
A hero illustration of a visitor stopped by a security guard at the revolving door of another office building, while next door the visitor's own building has its lit lobby standing open. The words 'Blocked. But not stopped.' are lettered across the scene.

Can React Talk to an MCP Server Directly?

2026.08.07

This is part 4 of a six-part series called “…
A small service-window building on an open notebook page, with two hatches labeled 'Resource' and 'Tool', a small tag hanging under the 'Tool' hatch reading 'Rejected if wrong', and a hand-lettered banner above reading 'What does the window hand you?'

What Does an MCP Server’s Counter Actually Hand You?

2026.08.07

This is part 3 of a six-part series called “…
An illustration of a small service counter set on an open map, with envelopes passing back and forth across it, and the words 'Speak the Server's Language' worked into the scene

What Does an MCP Server Actually Listen For?

2026.08.07

This is part 2 of a six-part series called “…
An illustration of a browser app that takes a natural-language question, has an AI draft SQL, queries a relational database, and returns a table, with the headline 'Where's the Client, Really?' worked into the scene

Where Does the MCP Client Actually Live?

2026.08.07

This is part 1 of a six-part series called “…
Illustration captioned 'Order decides everything' with a 400 marking, showing a letter being intercepted by the wrong window instead of the one it was addressed to

Your routing might be decided by ordering alone

2026.08.06

A request that should work comes back as 400 You a…
Blog header illustration for "Understanding Claude API Rate Limits" featuring a male figure and icons representing API usage limits and token counts

Understanding Claude API’s Usage Restrictions: Rate Limits Explained

2025.05.13

Hello everyone. I’m AM from the Efficiency I…