Reliability diagrams for the first-level classifier and the second-level transient classifier. The positive fraction (PF) is shown in black, and the respective calibration offset is indicated in red, both plotted against the confidence. The red shading for the latter reflects the density of sources within the corresponding probability bin, with darker shades indicating higher numbers of samples. The identity function is included as a reference. The bottom panels of the diagrams display the source count for each confidence bin.