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December 2025 Product Updates

December focused on introducing powerful workflow capabilities with Spec-Driven Development (SDD), enhanced content formatting with markdown tables and copy features, and significant platform stability improvements across both VS Code and JetBrains plugins.
New: Zenflow is now available! Orchestrate multiple AI agents to tackle complex development tasks with our new desktop app. Try Zenflow →

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Spec-Driven Development Workflows

Build Features with Guided Workflows

Create features or fix bugs reliably using agentic workflows that guide you through a structured development process with SDD (spec-driven development).
Zencoder now supports custom workflows for spec-driven development, making complex tasks more manageable and reliable: Key capabilities:
  • Guided development process walks you through feature creation and bug fixes with a structured approach
  • Custom workflow support allows you to create and configure workflows tailored to your team’s development process
  • Spec-first approach ensures clear requirements before implementation begins
  • Improved reliability through systematic planning and execution of development tasks
This feature brings enterprise-grade development practices to your daily workflow, helping teams maintain consistency and quality across projects.

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Enhanced Markdown Support

Better Content Formatting and Sharing

Improved markdown rendering with table support and new copy-as-markdown functionality for easier content sharing.
We’ve significantly improved how Zencoder handles markdown content in chat: New capabilities:
  • Markdown tables rendering displays tabular data properly formatted in chat responses
  • Copy as Markdown button makes it easy to export AI-generated content in markdown format
  • Enhanced code blocks preserve language syntax highlighting information
  • Line break preservation maintains formatting in user messages and code snippets
These improvements make it easier to work with formatted content and share AI-generated responses with your team.

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Model Context Protocol Enhancements

Per-Project MCP Configuration

Configure Model Context Protocol (MCP) tools on a per-project basis for better control over integrations and external tool availability.
Model Context Protocol tool configuration now supports project-level customization, giving you more flexibility in how AI agents interact with external services: What’s improved:
  • Per-project tool configuration allows different MCP server setups for different repositories, enabling project-specific integrations
  • Better session management with improved MCP session lifecycle handling and automatic cleanup on client close
  • Enhanced reliability through fixes for timeout issues, permission handling, and transport layer error messaging
  • RAG search integration with automatic MCP configuration for repository search capabilities
  • Improved MCP config parsing ensures proper tool detection and initialization
This granular control helps teams customize which external tools and services are available to AI agents based on specific project requirements and security policies.

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Platform Stability Improvements

Faster, More Reliable Experience

Major performance and stability enhancements deliver faster agent responses, better edge case handling, improved memory usage, and enhanced reliability during long sessions.
December brings extensive stability improvements across the platform: Performance enhancements:
  • Faster agent responses with optimized request handling and reduced latency
  • Better edge case handling prevents errors in unusual scenarios
  • Improved memory usage reduces resource consumption during extended sessions
  • Enhanced long-session reliability maintains stability during complex, multi-step tasks
User experience improvements:
  • Improved file browser behavior prevents duplicate dialogs when attaching files
  • Better context handling preserves current-file context settings correctly
  • Enhanced error messaging with clearer feedback for issues
These improvements create a noticeably smoother experience throughout your development workflow.

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Additional Updates

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Chat and Interface Enhancements

  • Fixed mention duplication when copying and pasting content in chat
  • Improved keyboard shortcuts with better keybinding display in the agent menu
  • Unicode filename support sanitizes pasted image filenames to prevent errors
  • Better custom agent updates ensure agent details refresh immediately after modifications

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Testing and Development Tools

  • Automatic Playwright installation for E2E and Web Dev agents eliminates manual setup steps
  • Open file from changes list allows quick navigation directly to modified files
  • Improved streaming reliability prevents interruptions when tool errors occur
  • Better diff handling with enhanced code change tracking and visualization

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Integration and Tool Updates

  • Improved CLI stability with better error handling and retry logic
  • Background process support for long-running operations without blocking
  • Enhanced RAG integration with automatic configuration and better error handling

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Version History

  • 3.20.0 (December 18, 2025)
  • 3.18.0 (December 12, 2025)
  • 3.16.0 (December 5, 2025)
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