July 2025 – plotly.js: Strengthened reliability and test coverage while modernizing the runtime and dependencies. Highlights include Jasmine test expansion, CI/test infrastructure improvements, and strategic repository and environment upgrades that deliver measurable business value through faster feedback loops, more reliable renders, and easier maintainability. The work also includes targeted bug fixes and baseline updates that stabilize releases and improve developer experience.

June 2025 focused on security hardening, test reliability, and cross-chart consistency for Plotly.js, delivering a reusable user-facing feature and accelerating feedback loops through CI optimizations. Key outcomes include the rollout of a unified hovertemplate across chart types, proactive security upgrades, and browser/runtime stability improvements that collectively reduce risk and shorten release cycles.

December 2024 monthly summary for plotly/plotly.js focusing on release engineering, stability, and security hygiene. The month delivered a major release candidate (3.0.0-rc.2) with targeted performance improvements and removal of deprecated attributes, alongside critical maintenance updates to tighten security and align versioning across the v2/v3 streams.

November 2024 focused on stabilizing test data, cleaning test assets, and delivering RC-level releases across plotly.js and plotly.py. Highlights include mock data integrity fixes and test assets cleanup, a Release 3.0.0-rc.1 with major module/build updates and deprecations, Plotly.js upgrade in the Python package with changelog updates, and new deprecation warnings for Mapbox traces to guide users without breaking templates. These efforts improved test reliability, build stability, upgrade paths, and overall user experience while maintaining backward compatibility where feasible.

October 2024 (2024-10) monthly summary for plotly.js focused on build hygiene, security, and user guidance. Implemented cleaner build artifacts by removing unused CSS files from bundles; patched security vulnerabilities via npm audit fix; enhanced deprecation and migration guidance with updated warnings and Python migration links; updated release notes accordingly. These changes reduce output clutter, improve security posture, and provide clearer upgrade paths for users, strengthening overall product reliability and developer experience.