TanStack/query
Nov 2024 – Jun 2025
7 Months active
Languages Used
JavaScriptTypeScriptYAMLGitText
Technical Skills
Code ConsistencyJavaScriptReactReact QueryReact TestingRefactoring
Jonghyeon Ko
PROFILE
Jonghyeon Ko
Manudeli Ko contributed to the TanStack/query repository by enhancing test reliability, modernizing build tooling, and improving type safety across the codebase. Over seven months, Manudeli refactored asynchronous test suites using JavaScript and TypeScript, adopting fake timers to reduce flakiness and accelerate CI feedback. They consolidated core types and standardized API naming, streamlining code organization for maintainability. Manudeli also migrated documentation and publishing scripts to TypeScript, strengthening the build process and repository hygiene. Their work included dependency management, CI/CD integration, and robust unit testing, resulting in a more stable, maintainable, and developer-friendly codebase with improved documentation and test coverage.
Overall Statistics
Feature vs Bugs
81%Features
Repository Contributions
52Total
Bugs
3
Commits
52
Features
13
Lines of code
9,686
Activity Months7
Your Network
133 people
Work History
June 2025
7 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for TanStack/query focused on quality, reliability, and developer experience. Delivered CI-based link verification for PRs, modernized build tooling and publishing workflows by migrating documentation generation and related scripts to TypeScript, stabilized flaky tests, and improved repository hygiene. These changes lower time-to-verify documentation, improve type safety in the publishing process, and maintain a cleaner codebase.
7 Commits • 3 Features
Jun 1, 2025June 2025 performance summary for TanStack/query focused on quality, reliability, and developer experience. Delivered CI-based link verification for PRs, modernized build tooling and publishing workflows by migrating documentation generation and related scripts to TypeScript, stabilized flaky tests, and improved repository hygiene. These changes lower time-to-verify documentation, improve type safety in the publishing process, and maintain a cleaner codebase.
June 2025
May 2025
10 Commits • 3 Features
May 1, 2025May 2025 monthly summary for TanStack/query: Focused on improving test reliability, API naming consistency, and core type consolidation across the query ecosystem. Delivered foundation for faster CI feedback, more maintainable code, and clearer API semantics across React, Angular, Solid, Svelte, and Vue packages, driving stability and developer productivity.
May 2025
10 Commits • 3 Features
May 1, 2025May 2025 monthly summary for TanStack/query: Focused on improving test reliability, API naming consistency, and core type consolidation across the query ecosystem. Delivered foundation for faster CI feedback, more maintainable code, and clearer API semantics across React, Angular, Solid, Svelte, and Vue packages, driving stability and developer productivity.
April 2025
11 Commits
Apr 1, 2025April 2025 monthly summary for TanStack/query focusing on stabilizing the test suite via fake timers across React Query, Solid-Query, and related test infra. The work addressed flaky tests in hydration, queriesObserver, queryObserver, infiniteQueryBehavior, useMutationState, useMutation, useQueryOptions, persister tests, and related test infrastructure. Coordinated across multiple test suites and dependencies to improve determinism, enable faster feedback, and reduce maintenance overhead.
11 Commits
Apr 1, 2025April 2025 monthly summary for TanStack/query focusing on stabilizing the test suite via fake timers across React Query, Solid-Query, and related test infra. The work addressed flaky tests in hydration, queriesObserver, queryObserver, infiniteQueryBehavior, useMutationState, useMutation, useQueryOptions, persister tests, and related test infrastructure. Coordinated across multiple test suites and dependencies to improve determinism, enable faster feedback, and reduce maintenance overhead.
April 2025
March 2025
13 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for TanStack/query: Delivered a major test-infrastructure feature that enhances reliability and speed of the Query library's test suites, plus a persistence client bug fix. Key feature delivered: Query Library Test Suite Reliability Improvements — refactored tests to use fake timers across isFetching, isMutating, query caches, notifications, mutation observers, focus manager, hydration boundary, and related test files, resulting in deterministic, faster tests and more stable CI. Major bug fixed: PersistQueryClientProvider Prop Handling Fix — corrected unnecessary spreading of the client prop; access client via props.client within useEffect and QueryClientProvider to ensure correct client handling. Impact: significantly reduced flaky tests, faster validation of changes, lower risk of misconfigured client state in persisted scenarios. Technologies/skills demonstrated: test automation with fake timers, Jest/RTL test refactoring, test suite architecture improvements, cross-repo collaboration.
March 2025
13 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for TanStack/query: Delivered a major test-infrastructure feature that enhances reliability and speed of the Query library's test suites, plus a persistence client bug fix. Key feature delivered: Query Library Test Suite Reliability Improvements — refactored tests to use fake timers across isFetching, isMutating, query caches, notifications, mutation observers, focus manager, hydration boundary, and related test files, resulting in deterministic, faster tests and more stable CI. Major bug fixed: PersistQueryClientProvider Prop Handling Fix — corrected unnecessary spreading of the client prop; access client via props.client within useEffect and QueryClientProvider to ensure correct client handling. Impact: significantly reduced flaky tests, faster validation of changes, lower risk of misconfigured client state in persisted scenarios. Technologies/skills demonstrated: test automation with fake timers, Jest/RTL test refactoring, test suite architecture improvements, cross-repo collaboration.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 — TanStack/query: Strengthened reliability of Query Core by adding dedicated test coverage for the keepPreviousData path. The new test ensures keepPreviousData returns its input unmodified and documents the expected behavior, reducing regression risk and improving maintainability for data caching flows. No major bug fixes recorded this month in this repository. Overall impact: higher confidence in Query Core semantics, more robust tests, and improved onboarding for future contributors. Technologies demonstrated: JavaScript/TypeScript, test-driven development, unit testing, and clear documentation.
1 Commits • 1 Features
Feb 1, 2025February 2025 — TanStack/query: Strengthened reliability of Query Core by adding dedicated test coverage for the keepPreviousData path. The new test ensures keepPreviousData returns its input unmodified and documents the expected behavior, reducing regression risk and improving maintainability for data caching flows. No major bug fixes recorded this month in this repository. Overall impact: higher confidence in Query Core semantics, more robust tests, and improved onboarding for future contributors. Technologies demonstrated: JavaScript/TypeScript, test-driven development, unit testing, and clear documentation.
February 2025
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 Monthly Summary for TanStack/query:\n\n- Focus: Strengthened type safety and ecosystem compatibility by updating React type-definition devDependencies to align with latest React versions. This work reduces type-related risk for downstream consumers and prepares the ground for upcoming features relying on up-to-date typings.\n- Scope: TanStack/query repository.\n\nKey achievements and focus areas:\n- Key feature delivered: React Type Definitions Dependency Update. Updated @types/react and @types/react-dom to newer versions to improve compatibility with latest React features and fixes. This aligns development tooling with the broader React ecosystem and reduces potential type errors in downstream projects.\n- Commits: ee628e1f9ee1e4cc448bdfd0a4e7e8a41b5ffc25 ("chore(react-query): update devDeps (#8427)").\n\nMajor bugs fixed: None reported this month.\n\nOverall impact and accomplishments:\n- Technical: Improved type-safety and compatibility for applications consuming TanStack/query, enabling smoother integration with updated React tooling and reducing maintenance burden related to type definitions.\n- Business value: Lower risk of type-related regressions for downstream projects, better alignment with React release cycles, and clearer upgrade paths for developers relying on TypeScript typings.\n\nTechnologies/skills demonstrated:\n- TypeScript typings management, dependency versioning, and release hygiene.\n
December 2024
1 Commits • 1 Features
Dec 1, 2024December 2024 Monthly Summary for TanStack/query:\n\n- Focus: Strengthened type safety and ecosystem compatibility by updating React type-definition devDependencies to align with latest React versions. This work reduces type-related risk for downstream consumers and prepares the ground for upcoming features relying on up-to-date typings.\n- Scope: TanStack/query repository.\n\nKey achievements and focus areas:\n- Key feature delivered: React Type Definitions Dependency Update. Updated @types/react and @types/react-dom to newer versions to improve compatibility with latest React features and fixes. This aligns development tooling with the broader React ecosystem and reduces potential type errors in downstream projects.\n- Commits: ee628e1f9ee1e4cc448bdfd0a4e7e8a41b5ffc25 ("chore(react-query): update devDeps (#8427)").\n\nMajor bugs fixed: None reported this month.\n\nOverall impact and accomplishments:\n- Technical: Improved type-safety and compatibility for applications consuming TanStack/query, enabling smoother integration with updated React tooling and reducing maintenance burden related to type definitions.\n- Business value: Lower risk of type-related regressions for downstream projects, better alignment with React release cycles, and clearer upgrade paths for developers relying on TypeScript typings.\n\nTechnologies/skills demonstrated:\n- TypeScript typings management, dependency versioning, and release hygiene.\n
November 2024
9 Commits • 4 Features
Nov 1, 2024November 2024 (TanStack/query): Focused on test-driven reliability improvements and maintainability. Delivered targeted feature/refactor changes and robust test coverage across prefetch/infinite query flows, suspense usage, and utility functions, while standardizing core helpers to reduce confusion and hidden bugs. Result: clearer API expectations, fewer regressions, and improved developer experience.
9 Commits • 4 Features
Nov 1, 2024November 2024 (TanStack/query): Focused on test-driven reliability improvements and maintainability. Delivered targeted feature/refactor changes and robust test coverage across prefetch/infinite query flows, suspense usage, and utility functions, while standardizing core helpers to reduce confusion and hidden bugs. Result: clearer API expectations, fewer regressions, and improved developer experience.
November 2024
Activity
Loading activity data...
Quality Metrics
Correctness98.0%
Maintainability98.0%
Architecture92.8%
Performance96.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
GitJavaScriptTextTypeScriptYAML
Technical Skills
Asynchronous JavaScriptAsynchronous ProgrammingBuild ConfigurationBuild ToolsCI/CDCode ConsistencyCode OrganizationCode QualityConfiguration ManagementDependency ManagementDocumentationESLintESLint ConfigurationFrontend DevelopmentGit
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline