Computer History builds on the Chronicle research preview with reduced token usa

• token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
• context window — The maximum amount of text a model can consider at once — its working memory for the current conversation or task.

Desktop-wide activity capture feeding ChatGPT and Codex changes what context an assistant has and what a developer is handing it, so the scoping controls matter.

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