August 14, 2026 / Daily Edition / 1 story in this issue
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A Forgotten Tool Is No Longer Callable in Pydantic AI

After compaction hides how a deferred tool reached an agent, Pydantic AI now makes the agent put that evidence back before the call can go through.

A torn-paper diagram shows compaction separating an unavailable deferred tool from tool-search and capability-load cards, with a circled call-blocked retry and a not-a-security-boundary stamp.
Diagram Punka tool must be visible in the surviving history before Pydantic AI lets it run.
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