Compares the two most recent scorable audits stored for ONE URL and reports the movement: score and grade before → after, which checks improved, which regressed, with both run timestamps. This is the progress meter of the fix loop. USE THIS to prove a deploy actually moved the number: lekta_audit → apply the fixes → deploy → lekta_audit again → lekta_diff. DO NOT use it to compare two different URLs or two pages of one site — it takes ONE url and compares that page against its own history — and do not call it when fewer than two scorable audits exist for that URL, which returns an error rather than a partial answer. For the ranked work list use lekta_fix_plan; for the current state of a page use lekta_audit. COST AND BEHAVIOUR: free and idempotent — reads storage only, no fetch, no quota; it never triggers an audit, so no diff exists until you have run lekta_audit twice yourself. Runs that could not be scored (grade U) and runs where a rule crashed server-side are excluded from the comparison entirely, so a failed re-audit is never reported as a regression — it simply is not there. When the engine version changed between the two runs the output says so, because part of the delta is then ours rather than yours.
ConnectorAPI key
