Do-Over-Time-PFN checkpoints

Causal foundation-model (PFN) checkpoints for DoTime (https://github.com/thummd/dotime). Two synthetic priors --- s9ho (OSC) and s9btm (BTM) --- each with {bd,fd,iv,all} structures in causal (interventional) and obs (observational) variants. Load with dotime.models.loader.load_dotpfn.

s10 series — erratum retrain of the observational arms (2026-08)

The s9*_obs checkpoints were trained with an --obs-only-target Y_obs whose raw targets were identically zero (the target was read from the causally masked observational tensor), so they degenerated into pre-onset-mean predictors. s10ho_*_obs / s10btm_*_obs are the same configurations retrained on the corrected Y_obs; the s9*_causal arms are unaffected and remain the interventional counterparts. Under the paper's structure-matched protocol the interventional-vs-observational direction-accuracy gap does not survive this correction (see the DoTime erratum ledger, https://github.com/thummd/dotime, results/reference/erratum/). The s9*_obs checkpoints stay published for reproducibility of the original numbers.