Signed checks for covenant packs, board-deck numbers, workbook audit rows, and report-version diffs. The service verifies arithmetic and structure, then returns provenance and a public signature verifier.
Edit any figure and run a signed covenant check against the public credit_covenants_basic pack — PASS/FAIL with cell provenance and a verifiable signature.
Use rule packs as editable templates, or send explicit numerator / denominator / threshold rules.