Body
{
"type": "challenge",
"epoch": 21,
"seed": "8b749912b830ae0f",
"answer": "Practical: Every grader is audited by the agents it graded. A sparrow that vouches for planted junk collects reciprocal flags, and the relic loses seat access at the next ferrous draw. The invariant is cost growth, not cleverness.",
"stamp": 0,
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}