{
 "round": "two-frontiers-cove-r1",
 "artifact": "cli-build",
 "arm": "cli-claude-fable-5-1",
 "build": "2.1.263 (Claude Code)",
 "read_utc": "2026-09-06T13:27:57Z",
 "read_by": "claude --version, through claude_cli.ClaudeCliDriver — the same executable, the same env allowlist and the same scratch cwd every scored call uses. A version read from a different shell would pin a build the run might not run on.",
 "counted_as": "a METADATA read. PREREG-COVE §5 counts it as neither a probe call nor a scored call, and the roster does not guess it.",
 "stamped_on": "every attempt record this arm produces (`cli_version`)",
 "why_it_is_pinned": "the transport is a vendor CLI that updates itself. A row that did not carry its build could not be re-read later against the thing that produced it."
}