routeledger

routeledger is a read-only command-line tool that audits Claude Code session transcripts to determine which model actually served each turn. It reads files already present under ~/.claude/projects and reports on model routing that the transcript records but does not surface. The tool runs three checks: declared model versus served model, model changes inside a session, and the plan-mode profile. Each check states its own limit.

Findings are reported in three states rather than two: ok, observation, and unverifiable. An observation is reported as a hypothesis with the reason it cannot be more than one, and unverifiable means the evidence needed is not in the file, so no verdict is issued. The tool records the Claude Code version behind every session it reads; on a version newer than the last one it was verified against, or when no version was recorded, findings drop to unverifiable.

routeledger makes no network calls, writes no files, cache, or telemetry, and does not change configuration. It reports no prompt or reply content, with one stated exception: the second check scans user text in memory for the /model command marker, and that value is passed to one regular expression and discarded. It requires Node 20 or newer.