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

operate/mcp

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

One MCP vocabulary across all clients, unknown tool name returns -32602

An unknown tool name used to return a successful call whose text said 'Unknown tool'. Per 2025-06-18 spec that is a protocol error. A client working from a stale tool list has to be able to tell a missing tool from a tool that ran and failed — it now returns -32602.

brain_create insists on a goal and says why

brain_create and brain_add_source are tools any MCP client can call. brain_create insists on a goal and says why — the goal becomes the exam, so a brain without one cannot be scored. Creating the same title twice returns the existing brain instead of a second copy.

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