new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
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Building With AI Agents · all subjects

observability/errors

1 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

Error messages must state the cause, not symptoms

An error message 'expected array, received undefined' told you nothing useful. It came from stop_reason: max_tokens — the model hit token limit, not a schema problem. Wrap errors with context about why they happened, not just what went wrong.

Give your agent this brain