New per-request debug mode captures the full pipeline — raw input, every redaction and token mapping, the post-redaction upstream body, the raw upstream response, and the final restored output. A diff view in the traffic log detail shows exactly what was changed and what was restored at each stage. Off by default, opt-in via X-Grepture-Debug: true header or the SDK's debug: true option. Auto-deletes after 24 hours and is never offloaded to cold storage. Hard-blocked when zero-data mode is enabled.