Added nanovirdx.inference.simulation._compat as the single compatibility boundary between Histo v2 domain representations and DiffSim.
Preserved the fine28-to-nine-tissue mapping, calibrated tissue parameters, sparse region_ids remapping, resolution validation, and simulation-state construction.
Kept Torch, NumPy, virdx-ome, and DiffSim Histo imports lazy.
Verified the module with Ruff check, Ruff format check, and Python byte compilation in the NanoVirDx Pixi environment.
Lessons Learned: Pitfalls
The diffsim workstream has no sops/index.md, so the required startup reading points to a path that does not exist.
git pull --ff-only in the knowledge repository failed with “Cannot fast-forward to multiple branches” despite a clean main; explicit fetch and merge worked.
Lessons Learned: Improvements
Document the NanoVirDx compatibility boundary and its public adapter function once the calling module is integrated.
Add a diffsim SOP index, even if it only links to current integration notes and compatibility constraints.
