Month 2025-10 focused on stabilizing and hardening the Census Builder in cellxgene-census. Delivered two critical bug fixes that enhance data integrity and downstream analytics, and updated dependency management to improve compatibility with evolving data tooling. These changes reduce risk of data type errors, breakages from dependency updates, and CI instability, enabling more reliable analytics pipelines.

Summary for 2025-09: Delivered a scalable TranscriptFormer embeddings pipeline for Census data, including a Dockerfile, a WDL workflow, and Python planning/inference/deposition scripts. Implemented support for data sharding and GPU-accelerated inference with memory optimizations, enabling scalable generation of census embeddings. Fixed mypy type-checking issues by refining annotations and casts in _highly_variable_genes.py and build_soma.py, improving correctness and maintainability. These efforts reduce operational risk and accelerate downstream analytics.

August 2025 — Focused on improving documentation quality and build stability for the cellxgene-census repo. No new user-facing features were delivered this month; two major fixes implemented to reduce risk and improve maintainability.

July 2025 monthly summary for chanzuckerberg/cellxgene-census focusing on feature delivery, code cleanup, and process improvements that reduce maintenance burden and improve build reliability.

April 2025 monthly summary for chanzuckerberg/cellxgene-census: Key features delivered include a new Jupyter notebook for training scVI models using TileDB-SOMA-ML, consolidation of Geneformer components with unit tests, and documentation formatting improvements for the PyTorch notebook tutorial. These efforts enabled researchers to run reproducible scVI experiments against the census data, streamlined maintenance via code consolidation, and improved user-facing docs to reduce onboarding friction.

March 2025 monthly summary for chanzuckerberg/cellxgene-census focused on CI modernization and dependency management improvements that enable broader compatibility and more maintainable CI pipelines.

February 2025 monthly summary focusing on delivering cross-repo improvements, stabilizing CI/CD, and ensuring accurate data handling across cell biology data platforms. Highlights include dependency alignment with TileDB Embedded for tiledb-vector-search, upgrades to the cell embedding generation pipeline aligned with the 2025-01-30 LTS release, and CI/CD stability improvements for Geneformer and git-lfs, plus a critical bug fix in Census Models date handling that ensures correct default epoch processing.