Repo · Safety & guardrails

pi-heed

Checks every side-effecting tool call against what you asked for.

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How builders describe it

Runtime constraints for the pi coding agent: checks every side-effecting tool call against what you said, before it runs. Powered by TypeSafe Jev.

Pi coding-agent extension that turns conversational user constraints into structured policy and checks side-effecting tool calls against that policy before they run, with TypeSafe Jev helping classify policy changes.

Hi guys, I built pi-heed for Pi: It keeps conversational constraints like “don’t modify files” or “never call production” as runtime state, then checks side-effecting tool calls before they execute. Obvious cases use deterministic rules; ambiguous free-text constraints use Jev. It defaults to…

The decision Jev makes

Allow, flag or escalate a message, tool call or action.

Where it fits

Screening messages, tool calls and outputs before they cause trouble. Jev gives a fast, calibrated verdict that can sit in front of every request or agent action. All 131 safety & guardrails projects →

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