December 2025 Changelog

Marcel Tan

Co-Founder & CEO

Release Notes

December brought the debut of our AI Trace Assistant, a debugging companion that has contextual understanding of your Tusk Drift observability data. Go beyond Sentry-level observability by drilling into request and response bodies.

We also shipped CoverBot support for Java/Kotlin repos and made reliability improvements to Tusk Drift's deviation analysis and test suite maintenance.

The Node.js SDK now has Turbopack support for Next.js, while the Tusk Drift CLI has an onboarding agent that installs and initializes the SDK with a single command. We've given the CLI secure replay functionality that runs all test operations in a local sandbox to prevent unintended external requests.

Not a bad way to close out 2025.

Platform

Major Features

  • AI Trace Assistant: Chat with your traces to debug errors and analyze performance trends, comes with built-in sandbox integration, tool calling, and session management
  • Observability Dashboard: Get full visibility into traces and spans recorded by Tusk Drift; drill down into the request and response bodies of individual spans
  • MCP Server for Tusk Drift: Model Context Protocol integration for Claude Code and other MCP clients (only part of AI Trace Assistant currently)
  • Unit Test Selection for New Pipeline: Allow test case selection when committing unit tests generated using our speedier test generation pipeline
  • Java/Kotlin Coverage Analysis: CoverBot now supports Cobertura coverage provider

Test Quality Improvements

  • Enhanced Tusk Drift's deviation analysis and test replay functionality with better error handling
  • Added intelligent API test validation before moving test from "Draft" to "In Suite"

DevEx Enhancements

  • Karma test framework support for Tusk Tester
  • UI/UX revamp across Tusk Drift run pages in web app

CLI

Major Features

  • Onboarding Agent: Automatically install and initialize the Tusk Drift SDK in one CLI command
  • Secure Replay: All test replay operations now run in a fenced local sandbox, preventing unintended external requests during testing
  • Suite-Wide Value Matching: Improved mock matching for more reliable Tusk Drift test replay
  • Multiple Git Remotes Support: Cloud onboarding now handles repos with multiple git remotes

DevEx Enhancements

  • Added JSON output option for trace list command, enabling programmatic processing
  • Better terminal rendering when color support is unavailable

SDKs

Node.js

  • Turbopack Bundler Support: Next.js compatibility with modern bundler
  • Instrumentation Manifest Generation: Build time manifest generation for improved performance

Python

We're actively building out the Python SDK, will announce more updates in the coming weeks!

[Previous post

**November 2025 Changelog**](/content/resources/november-2025-changelog/index.html)
[Next post

**We Fixed 23 Bugs in 2 Weeks By Getting AI to Break Things 24/7**](/content/resources/we-fixed-23-bugs-in-2-weeks-by-getting-ai-to-break-things-while-we-slept/index.html)