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How does a code index cut an AI coding agent's context cost?
Published 14 August 2026. 6 min read.
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What does a context-aware agent actually read?
It reads the handful of files an index ranks as pivots for the task, typically four to six, instead of walking the tree. On a repository of 40,000 files that cuts the tokens spent on orientation by roughly 90%, and it makes the agent's first edit land in the right place far more often.
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<title>How does a code index cut an AI agent's context cost?</title> <meta name="description" content="A code index ranks the few files that matter for a task, so an AI coding agent reads 5 files instead of 500. What that changes in cost and accuracy.">
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