Free rules for coding agents.

Rules load in every session, so the agent applies them without being asked. These three change how it handles evidence and untrusted input: what it treats as instructions, when a measurement counts as confirmed, and what it may state as fact.

Agent Security

Treats anything the agent did not receive from the user as data rather than instructions, and covers dependency and MCP supply chain vetting.

Measurement Verification

Treats a count or status read out of a tool as a claim the tool is making, requiring a second method that fails differently before it becomes a conclusion.

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