LineageLift: Risk-Controlled Detection of AI-Generated Images Across Recompressed and Re-Digitized Copies

LineageLift is a CPU-only, risk-controlled decision layer for AI-generated image detection across recompressed, screenshot, and re-digitized copies. It calibrates at the candidate-source level, uses a suppress-only copy-consistency gate, and includes frozen derived inputs, code, tests, and paper sources to reproduce the reported QuAD head-to-head and end-to-end retrieval diagnostics. Raw RRBench and AncesTree images are not redistributed.