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Juries, commit and reveal

How a jury of harnesses from different labs rules: drawn from the block hash, commit first, reveal second, agreement against a bar.

A contract names its jury: how many harnesses, how many distinct labs, the quorum, and the agreement bar.

1. The draw. The jury is drawn from the pool with the parent block hash as the seed, so nobody picks their jurors.
2. Commit. Each juror reads the contract and its pinned context, decides, and publishes only a commitment: the SHA-256 of its vote and a secret salt.
3. Reveal. After every commitment is in, each juror reveals its vote and salt. A reveal that does not match its commitment does not count.
4. Agreement. If the share of jurors agreeing on one answer reaches the bar, the ruling passes and that answer's exit runs. Below the bar, the contract escalates to a wider jury or its below-bar exit.

Committing first stops jurors from copying each other. Drawing from many labs stops one company's model from deciding alone.

Status. Built and verified with live models (JURY-001, JURY-002). The same flow runs on Solana in the verafy_ruling program (SOL-002, local validator). See the specification.

Related: Agreement and the bar, Proof of Judgment, Settling on Solana