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Aki Matsumura

Posts by Aki Matsumura

Illustration captioned 'SAME MUGSHOT, EVERY TIME' with an 'ENOENT' case file, where a detective examines the executable's mugshot with a magnifying glass while the folder that actually went missing quietly slips out through a background window

Node’s spawn names the executable in every ENOENT, even when your working directory is what’s actually gone

2026.08.11

It is a common pattern in deploy scripts: create a…
Hero illustration contrasting slides that ride correctly along a circle on one side with slides pulled inward along straight connecting lines on the other, carrying the text 'Where does a circle become a line?'

A circular slider whose inertia and autoplay run on CSS alone

2026.08.07

A slider whose slides ride along a circle. Part Fe…
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…
thumbnail: roboto, man, car

Will AI Make Databases Obsolete?

2026.04.15

“If AI keeps advancing, do we even need data…
Family enjoying Taiwanese New Year dinner with traditional food, lanterns, and red envelopes.

New Year in Taiwan

2026.04.09

Hi everyone! I’m H, from the sales developme…
buntan and homemade buntan jam

Pomelos from My Garden

2026.04.06

My First Pomelo Harvest Two months after moving to…