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Your system prompt is too big #19212
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bugSomething isn't workingSomething isn't workingextensionIssues related to the VS Code extensionIssues related to the VS Code extensionrate-limitsIssues related to rate limits, quotas, and token usage reportingIssues related to rate limits, quotas, and token usage reporting
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bugSomething isn't workingSomething isn't workingextensionIssues related to the VS Code extensionIssues related to the VS Code extensionrate-limitsIssues related to rate limits, quotas, and token usage reportingIssues related to rate limits, quotas, and token usage reporting
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What version of the IDE extension are you using?
26.417.40842
What subscription do you have?
Plus
Which IDE are you using?
VSCode/.Cursor (same)
What platform is your computer?
No response
What issue are you seeing?
I am trying Codex (after years of using Cursor and months of Claude Code) and the system prompt looks bloated.
Asking a simple question "what is 2+2" consumes ~13k (13 thousand!) tokens. I don't have any skills, custom prompts, MCPs, my project's agents.md is 30 lines (500 tokens).
I interrogated Codex to tell me how big the system instructions are and it says:
Pardon my French, this is nuts.
What steps can reproduce the bug?
Ask "What is 2+2" in VScode extension, see this
What is the expected behavior?
No response
Additional information
No response