The Context Window Is Full Before the First Prompt — When Project Rules in Claude Code Become a Fixed Cost of Every Session
This story is from 2026-10-22. It is preserved in the archive; the latest stories are on the live feed.
A subagent in Claude Code is supposed to answer a one-line question about the tool's documentation. It aborts before taking its first step: Prompt is too long , 347,814 tokens against a limit of 200,000. The question itself had loaded nothing. What had loaded were the project instructions that ever…
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- 2026-10-22 20:23 · DEV Community — AI
The Context Window Is Full Before the First Prompt — When Project Rules in Claude Code Become a Fixed Cost of Every Session