Stitch changelog: what's new each month
Every stable Stitch release summarised by month: the highlights, new features, improvements, fixes and anything you need to act on. 2 months covered; the current month updates daily.
April 2026
1 release: 0.1.1
April brought significant developer experience improvements to Stitch, with native TypeScript support for the SDK and enhanced authentication options. The release focused on robustness and tooling capabilities for building consistent UI systems.
Highlights
- Native TypeScript support added to the Application Development Kit for better type safety during development.
- Dual authentication now supported: use accessToken or apiKey with StitchProxy client.
- New Design System Tools enable generation and consumption of consistent visual token systems.
- Type-safe introspection API introduced with toolMap for deep inspection of registered MCP tools.
- Improved reliability of the Project.generate() pipeline through dynamic component scanning.
New
- TypeScript support for @google/stitch-sdk/adk
- Design System Tools for visual token generation and consumption
- Dual authentication with accessToken support in StitchProxy
- Typed introspection API with toolMap for MCP tools
- buildFifeSuffix utility for high-resolution screenshot URLs
- Example containerized deployment package for Stitch MCP Proxy
Improved
- Project.generate() pipeline now uses dynamic scanning of outputComponents for greater reliability
- Added defensive null checks to generated projection paths
- AUTHFAILED errors now properly classified in parseToolResponse
Fixed
- Eliminated fragile hardcoded array index strategy in the projection generation pipeline
March 2026
3 releases: 0.0.1 → 0.0.3
March marked Stitch's initial public release with the foundational SDK library and core capabilities for project creation and variant generation. The month focused on establishing a stable, open-source foundation with proper tooling and documentation.
Highlights
- Initial SDK release with identity map pattern and core project creation functionality
- Build-time version injection from package.json for automatic SDK versioning
- New contract tests to verify example code uses correct API field names
- Stitch tools added to the SDK for expanded capabilities
New
- stitch.createProject(title?) method to create projects directly from the domain layer
- Identity map pattern implementation
- Stitch tools as part of the SDK
- Contract tests for validating example code correctness
Improved
- Monorepo structure with core functionality reorganized into packages/sdk/
- Build-time version injection sourced from package.json
- Integration tests excluded from default vitest runs for faster development cycles
Fixed
- Removed duplicate skills directory configuration
- Corrected generate-variants example to use variantCount instead of numVariants
- Removed stale dist/package.json hazard that could cause publishing issues
Summaries are written automatically from the official release notes (full changelog ↗); check the original notes before relying on a detail. Stitch: pricing, features and alternatives · All changelogs