pmndrs/valtio
Oct 2024 – Jan 2026
10 Months active
Languages Used
JavaScriptTypeScriptMarkdownCSSHTMLYAMLcssyaml
Technical Skills
Frontend DevelopmentProxy ObjectsState ManagementTestingDocumentationFront-end Development
Michael Sweeney
PROFILE
Michael Sweeney
Mike contributed to the pmndrs/valtio repository by building and refining core state management utilities, focusing on proxy-based data structures and their integration with React. He implemented features such as epoch-based versioning for proxyMap and proxySet, deep-cloning enhancements, and a recursive deep proxy utility, all designed to improve reactivity and reliability. Using TypeScript, JavaScript, and CSS, Mike addressed subtle edge cases, modernized API surfaces, and ensured cross-theme UI consistency. His work included comprehensive documentation updates, targeted bug fixes, and expanded test coverage, resulting in a more maintainable codebase and a smoother onboarding experience for both users and contributors.
Overall Statistics
Feature vs Bugs
47%Features
Repository Contributions
18Total
Bugs
8
Commits
18
Features
7
Lines of code
10,647
Activity Months10
Your Network
13 peopleShared Repositories
13
Work History
January 2026
1 Commits
Jan 1, 2026Month: 2026-01 | Focus: Documentation reliability in pmndrs/valtio. Delivered a targeted documentation fix to restore access to learning resources, improving the onboarding experience for new users and reducing confusion around educational materials. What was delivered: - Documentation: Fixed a broken link in the Valtio docs, pointing to a valid learning resource and ensuring uninterrupted access to educational materials.
1 Commits
Jan 1, 2026Month: 2026-01 | Focus: Documentation reliability in pmndrs/valtio. Delivered a targeted documentation fix to restore access to learning resources, improving the onboarding experience for new users and reducing confusion around educational materials. What was delivered: - Documentation: Fixed a broken link in the Valtio docs, pointing to a valid learning resource and ensuring uninterrupted access to educational materials.
January 2026
November 2025
2 Commits • 1 Features
Nov 1, 2025Month: 2025-11 focused on TypeScript modernization and API enhancements for ProxySet in pmndrs/valtio, delivering a safer and more extensible API with improved typing and maintainability.
November 2025
2 Commits • 1 Features
Nov 1, 2025Month: 2025-11 focused on TypeScript modernization and API enhancements for ProxySet in pmndrs/valtio, delivering a safer and more extensible API with improved typing and maintainability.
September 2025
1 Commits • 1 Features
Sep 1, 2025September 2025 (pmndrs/valtio) monthly summary: Key feature delivered: unstable_deepProxy utility enabling recursive proxying of objects, with Maps/Sets proxied via proxyMap/proxySet equivalents; preserves reactivity and handles circular references; includes documentation and tests. Also reverted deepClone to its original implementation to stabilize behavior, highlighting unstable_deepProxy as an alternative for state with proxyMaps/proxySets. Commit: 8a057d5d628f972329dab8cc892824b86a89ba9e ('changed deepClone back to original and added deepProxy (#1169)')
1 Commits • 1 Features
Sep 1, 2025September 2025 (pmndrs/valtio) monthly summary: Key feature delivered: unstable_deepProxy utility enabling recursive proxying of objects, with Maps/Sets proxied via proxyMap/proxySet equivalents; preserves reactivity and handles circular references; includes documentation and tests. Also reverted deepClone to its original implementation to stabilize behavior, highlighting unstable_deepProxy as an alternative for state with proxyMaps/proxySets. Commit: 8a057d5d628f972329dab8cc892824b86a89ba9e ('changed deepClone back to original and added deepProxy (#1169)')
September 2025
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 (2025-05) monthly summary for pmndrs/valtio. Focused on improving developer experience and ecosystem discoverability through documentation updates and a cross-framework import fix. Highlights include ecosystem docs enhancements and a key import-compatibility fix that reduces friction for non-React usage.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 (2025-05) monthly summary for pmndrs/valtio. Focused on improving developer experience and ecosystem discoverability through documentation updates and a cross-framework import fix. Highlights include ecosystem docs enhancements and a key import-compatibility fix that reduces friction for non-React usage.
April 2025
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for pmndrs/valtio: Delivered documentation and linting improvements to the core TypeScript codebase, enhancing maintainability and onboarding. Focused on TS-Doc coverage across core modules (hooks, types, utilities) and linting fixes to improve clarity and consistency. No major bug fixes reported this period. Business impact: improved API discoverability for contributors, faster onboarding, and higher code quality.
1 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for pmndrs/valtio: Delivered documentation and linting improvements to the core TypeScript codebase, enhancing maintainability and onboarding. Focused on TS-Doc coverage across core modules (hooks, types, utilities) and linting fixes to improve clarity and consistency. No major bug fixes reported this period. Business impact: improved API discoverability for contributors, faster onboarding, and higher code quality.
April 2025
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for pmndrs/valtio. Delivered targeted deep-cloning improvements for reactive state and ensured CI status is accurately reflected in documentation, enhancing developer experience and reliability of the library.
March 2025
2 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for pmndrs/valtio. Delivered targeted deep-cloning improvements for reactive state and ensured CI status is accurately reflected in documentation, enhancing developer experience and reliability of the library.
January 2025
1 Commits
Jan 1, 2025January 2025 monthly summary focusing on key accomplishments, major bugs fixed, and overall impact. Key work centered on delivering a cross-theme styling fix for code and pre elements on valtio.dev, ensuring correct display in light and dark modes by updating prism-theme.css. This change enhances UI consistency, readability, and accessibility, while reducing potential user confusion across themed environments. The work is demonstrated through a targeted bug fix in repo pmndrs/valtio, with direct impact on user-facing code blocks and developer experience.
1 Commits
Jan 1, 2025January 2025 monthly summary focusing on key accomplishments, major bugs fixed, and overall impact. Key work centered on delivering a cross-theme styling fix for code and pre elements on valtio.dev, ensuring correct display in light and dark modes by updating prism-theme.css. This change enhances UI consistency, readability, and accessibility, while reducing potential user confusion across themed environments. The work is demonstrated through a targeted bug fix in repo pmndrs/valtio, with direct impact on user-facing code blocks and developer experience.
January 2025
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for pmndrs/valtio: Key features delivered include improvements to documentation and website styling for Valtio to boost readability and consistency across the site. Major bugs fixed comprise StackBlitz rendering fixes through an updated syntax highlighter aligned with the React version and cleanup of unused dependencies, and homepage code display improvements for valtio.dev by resolving build issues and adding necessary declaration files. Overall, these efforts enhanced developer experience, reduced friction for trying examples, and cleaned up project dependencies.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for pmndrs/valtio: Key features delivered include improvements to documentation and website styling for Valtio to boost readability and consistency across the site. Major bugs fixed comprise StackBlitz rendering fixes through an updated syntax highlighter aligned with the React version and cleanup of unused dependencies, and homepage code display improvements for valtio.dev by resolving build issues and adding necessary declaration files. Overall, these efforts enhanced developer experience, reduced friction for trying examples, and cleaned up project dependencies.
November 2024
2 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on contributions to the pmndrs/valtio repository. Highlights include a critical bug fix to UI reactivity and documentation improvements that enable emoji-based alerts, driving reliability and cross-platform consistency across GitHub and the project site.
2 Commits • 1 Features
Nov 1, 2024Concise monthly summary for 2024-11 focusing on contributions to the pmndrs/valtio repository. Highlights include a critical bug fix to UI reactivity and documentation improvements that enable emoji-based alerts, driving reliability and cross-platform consistency across GitHub and the project site.
November 2024
October 2024
1 Commits
Oct 1, 2024Month: 2024-10 — Key accomplishments focused on correctness and reliability of the proxy-based state management in pmndrs/valtio. Implemented epoch-based versioning for proxy data structures and fixed subtle has() edge-cases in proxyMap and proxySet, backed by targeted tests to cover add/delete/clear scenarios. This work improved snapshot consistency, reduced regressions in production applications, and enhanced maintainability of the codebase.
October 2024
1 Commits
Oct 1, 2024Month: 2024-10 — Key accomplishments focused on correctness and reliability of the proxy-based state management in pmndrs/valtio. Implemented epoch-based versioning for proxy data structures and fixed subtle has() edge-cases in proxyMap and proxySet, backed by targeted tests to cover add/delete/clear scenarios. This work improved snapshot consistency, reduced regressions in production applications, and enhanced maintainability of the codebase.
Activity
Loading activity data...
Quality Metrics
Correctness93.4%
Maintainability92.8%
Architecture89.4%
Performance88.8%
AI Usage21.2%
Skills & Technologies
Programming Languages
CSSHTMLJavaScriptMarkdownTypeScriptYAMLcssyaml
Technical Skills
Build ToolsCSSCSS StylingCode QualityDependency ManagementDocumentationFront End DevelopmentFront-end DevelopmentFrontend DevelopmentJavaScriptProxy APIProxy ObjectsReactState ManagementTesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline