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easySystem Design

Context windows in 2025-26: how do you use 128k-1M tokens without drowning?

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01

Understand the problem

Lost-in-the-middle, needle-in-haystack, and strategies for huge contexts.

context-windowlong-context
02

Attempt it yourself

Sketch your approach before reading the solution — that's what interviews test.

Nudge consolestandby

Stuck? Beam a request up — the console returns a conceptual nudge that guides your logic without spoiling the implementation.

03

Study the solution

128k is table stakes, Gemini/Claude offer 1M. Do not stuff — retrieve + place key info at start/end, compress middle, and test needle recall.

Solution ready — 2 min read

Classified // press E to declassify

04

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Transmission complete // awaiting log

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STREAK ALIVE.

Dossier 5 of 80 decoded in the AI Engineering track. One more won't hurt.

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