v2.6.0

Earlier version of the analysis for Edwards (2026), "Constraints on the Origin of the Asteroid Belt's Compositional Gradient from Debiased Taxonomic Data", which cites v2.6.3. v2.6.1 and v2.6.3 change only how figures are drawn; their numbers are identical (see their notes).

Three new figures, drawn from computed results only:

paper	file	shows
Fig. 1	fig10_snow_line_track.png	the snow line of Equation (1) along the 1 M☉ pre-main-sequence track of Baraffe et al. (2015), against the present belt and the debiased crossover. It first lies inside the belt's outer edge (3.3 AU) at 1.4 Myr and inside its inner edge (2.1 AU) at 5.3 Myr.
Fig. 3	fig11_sample_flow.png	how the four samples are built from the catalog release, with the number of bodies at each step
Fig. 12	fig12_albedo_by_group.png	the measured albedo of each taxonomic group: 84% of C-like and 13% of S-like bodies are darker than 0.10

The Baraffe et al. track (198 rows of the 1.000 M☉ table, log t ≤ 7.73) is stored in bhac15.py, with its source URL and the sha256 of the downloaded table.

summary.json. New blocks: snow_line_track, sample_sizes and albedo_by_group. Every other value, and all eleven figures of v2.5.0, are byte-identical. The input is still AsteroidCatalog data-2026-09-29c (data contract 1.8.1).

New API: figures.snow_line_track, sample_flow and albedo_by_group, bhac15.TRACK_1MSUN, and pipeline.albedo_by_group_numbers and snow_line_track_numbers.