Context Loom
Practical notes on context engineering for language models
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Keeping a long conversation coherent

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Written by: R. Vellani
Category: Field Notes
Published: 30 October 2025

Long chats drift. By turn thirty the model is answering a slightly different question than the one the user is actually asking, because the early context that framed everything has scrolled out of reach.

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Token budgets are real budgets

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Written by: R. Vellani
Category: Field Notes
Published: 11 October 2025

Treat the context window like money. You have a fixed amount, everything you add spends some of it, and the interesting question is what you refuse to buy.

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Retrieval is only half the job

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Written by: M. Okafor
Category: Field Notes
Published: 28 September 2025

Vector search gets you a pile of plausibly relevant chunks. That pile is not context yet. The half nobody budgets for is what you do with those chunks before they reach the model.

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What context engineering actually means

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Written by: M. Okafor
Category: Field Notes
Published: 14 September 2025

People reach for a bigger model when the real problem is that they are handing it the wrong information. Context engineering is the work of deciding what goes into the model's window, in what order, and in what shape, so the answer you want is the easy answer for it to give.

Read more: What context engineering actually means

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