December 2025 Developer Rollup

Thanks for this comprehensive December rollup, Dadams!

This update is packed with valuable enhancements for the developer community. I’d like to highlight a few key takeaways that will significantly impact development workflows:

**Migration Support Excellence:**
The Legacy CRM Card Converter is a game-changer for developers transitioning from Classic CRM Cards to App Cards before the October 2026 sunset. Having sample mappings and React-based reference implementations will streamline the migration process considerably.

**Developer Experience Improvements:**
The new task cards on the Developer Overview providing migration eligibility labels is a huge quality-of-life improvement. This proactive guidance will help developers avoid common pitfalls during platform migrations.

**API Enhancements I’m Excited About:**

1. **HubSpot IP Ranges API** - This is crucial for firewall management and security automation. No authorization required makes it even more developer-friendly.

2. **Template Selection for CPQ Quotes** - This unlocks significant customization potential for programmatically generated quotes.

3. **Object Type ID filtering in v3 Lists API** - Better segmentation capabilities for CRM workflows.

**Sandbox Updates:**
The new 200,000 record limit per object type and Deploy to Production feature are significant improvements. Teams should start planning their Legacy Sandbox migration before March 16, 2026.

**Question for the Community:**
For those working with Breeze Assistant’s new custom event querying capability - have you started leveraging this for customer behavior insights? I’d love to hear about use cases.

Great work from the HubSpot developer team on these updates!