> For the complete documentation index, see [llms.txt](https://adatrack.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://adatrack.gitbook.io/docs/changelog/2026-02.md).

# February 2026

### Features & Enhancements

* **Statistics V2 Overhaul:**
  * Visual Query Builder for constructing complex telemetry filters.
  * Ability to save and reuse custom queries and chart configurations.
  * Integration of saved charts into Interactive Dashboards.
  * New "Saved Queries" panel for quick access to frequent analyses.
* **Persistent Usage Metering:**
  * Introduced `usage_ledger` for precise tracking of billable events.
  * Decoupled usage from data retention, ensuring historical usage remains accurate.
  * Real-time quota enforcement across Reporting, Workflows, and Statistics.
* **Data Retention Policies:**
  * Added support for per-account data retention settings (in days).
  * Automated background tasks to purge expired telemetry while preserving usage records.
* **Statistics Quotas:**
  * Implemented quota management for complex query executions and saved queries.

### Improvements & Fixes

* **Dashboard Stability:** Replaced flaky container width detection with `@mantine/hooks` for responsive grid resizing.
* **Query Performance:** Added metrics for query execution time to identify and optimize slow analytical queries.