Reading a card

An evidence card answers one question about one claim. These fields matter most:

Field	Question it answers
claim_boundary	What exactly does this card show, and where does it stop?
result_status	What did the frozen gate say?
reproduction_level	Has anyone reproduced it?
verification_level	How many operators, and were they independent?
official_source_url, access_date	Which public source, and when was it read?
sanitized_report_sha256	Which report do the hashes refer to?
execution_mode	Manual or AI-assisted provenance.
known_limitations	What the maintainer already knows the card does not cover.

Result status

Status	Meaning
PASSED_UNDER_PROTOCOL	The narrow claim passed the frozen gate. Not a statement about general quality or safety.
NEGATIVE_RESULT_UNDER_PROTOCOL	The check completed and the candidate did not pass.
BLOCKED_SOURCE	The source could not support a fair verdict (access, rights, lineage).
INSUFFICIENT_COVERAGE	The source is too sparse for the pre-registered test.

Colors on the SVG are a visual aid; the exact strings are authoritative. See the full result status protocol.

Reproduction

A rerun that reaches the same outcome with the same source bytes gives REPRODUCED_OUTCOME. If the source bytes changed but the gate outcome is the same, the level is REPRODUCED_OUTCOME_WITH_SOURCE_BYTE_DRIFT (yellow chip). It is not a failed gate.

The evidence card protocol lists every field. The common misreadings page covers the mistakes readers make most often.