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Valentyna

Developer

Valentyna

vkozlova@microsoft.com

40 commits~8 files/commit

Performance

YoY:+6%
2026Previous year

Insights

Key patterns and highlights from this developer's activity.

Peak MonthMar'25113 performance
Growth Trend↓90%vs prior period
Avg Files/Commit8files per commit
Active Days35of 455 days
Top Repofluentui40 commits

Effort Over Time

Breakdown of growth, maintenance, and fixes effort over time.

Bug Behavior

Beta

Bugs introduced vs. fixed over time.

Investment Quality

Beta

Reclassifies engineering effort based on bug attribution. Commits that introduced bugs are retrospectively counted as poor investments.

63%Productive TimeGrowth 71% + Fixes 29%
35%Maintenance Time
2%Wasted Time
How it works

Methodology

Investment Quality reclassifies engineering effort based on bug attribution data. Commits identified as buggy origins (those that introduced bugs later fixed by someone) have their grow and maintenance time moved into the Wasted Time category. Their waste (fix commits) remains counted as productive. All other commits retain their standard classification: grow is productive, maintenance is maintenance, and waste (fixes) is productive.

Relationship to Growth / Maintenance / Fixes

The standard model classifies commits as Growth, Maintenance, or Fixes. Investment Quality adds a quality lens: a commit that introduced a bug is retrospectively counted as a poor investment — the engineering time spent on it was wasted because it ultimately required additional fix work. Fix commits (Fixes in the standard model) are reframed as productive, because fixing bugs is valuable work.

Proposed API Endpoint

Currently computed client-side from commit and bug attribution data. Ideal server-side endpoint:

POST /v1/organizations/{orgId}/investment-quality
Content-Type: application/json

Request:
{
  "startTime": "2025-01-01T00:00:00Z",
  "endTime": "2025-12-31T23:59:59Z",
  "bucketSize": "BUCKET_SIZE_MONTH",
  "groupBy": ["repository_id" | "deliverer_email"]
}

Response:
{
  "productivePct": 74,
  "maintenancePct": 18,
  "wastedPct": 8,
  "buckets": [
    {
      "bucketStart": "2025-01-01T00:00:00Z",
      "productive": 4.2,
      "maintenance": 1.8,
      "wasted": 0.6
    }
  ]
}

Recent Activity

Latest analyzed commits from this developer.

HashMessageDateFilesEffort
0fbdec7This commit introduces a **new feature** to the **`react-calendar-compat`** package, significantly enhancing keyboard navigation within the **`CalendarDayGrid`** component. Users can now seamlessly navigate to the next date using arrow keys, improving accessibility and overall user experience. The implementation updates the internal arrow navigation group to utilize a `grid-linear` axis for more intuitive movement across the calendar grid. Comprehensive test cases have been added to `CalendarDayGrid.test.tsx` to ensure the correct behavior of this new navigation, including various boundary conditions.Mar 53maint
3399d8eThis commit introduces a **new feature** to the **`react-calendar-compat` package**, enabling **reverse date selection** within the `CalendarMultiDayView` component. It modifies the `getDateRangeArray` utility to correctly handle negative `daysToSelectInDayView` values, allowing date ranges to be selected backward from a specified end date. This enhancement provides greater flexibility for users when selecting date ranges. The change includes new unit tests for the updated **date math utilities**, a storybook example demonstrating the new functionality, and **visual regression tests** to ensure the UI behaves as expected.Sep 296maint
c7c1715This commit introduces a **bug fix** for the **`@fluentui/priority-overflow`** package, resolving an issue where the `overflowMenuSize` was not correctly included in the `occupiedSize` calculation, leading to improper overflow behavior. To facilitate this, a **new feature** was added to the **`@fluentui/react-overflow`** package: a `hasHiddenItems` prop for the `Overflow` component and an option for the `useOverflowContainer` hook. This allows consumers to explicitly indicate when items are initially hidden, ensuring the `createOverflowManager` accurately accounts for the overflow menu's space. The change improves the reliability of overflow components across Fluent UI, with updated API documentation and a `BreadcrumbOverflowExample` story demonstrating its usage.Sep 2210waste
3283edeThis commit delivers a **bug fix** for the **`react-datepicker-compat`** component, resolving an issue where clicking the date picker's icon would inadvertently trigger the `useOnClickOutside` hook. Previously, this interaction could cause the date picker to immediately close or fail to open correctly after an icon click. The fix involves adding `ev.preventDefault()` to the `onIconClick` handler within `useDatePicker.tsx`, preventing the default event behavior from interfering with the picker's state. This ensures that **clicking the date picker icon** now functions as expected, providing a more reliable user experience for the **date picker component**.Sep 22waste
b2aff77This commit **improves the developer experience** for the **`@fluentui-react-popover` package** by **updating documentation**. Specifically, it adds a direct link to comprehensive positioning documentation within the JSDoc comment for the `positioning` prop in `PopoverProps` located in `Popover.types.ts`. This **documentation update** ensures that developers can easily access relevant information about how to configure popover positioning directly from their IDEs or generated API docs, streamlining the development process.Aug 192maint
aba3aaeThis commit performs a **documentation update** for the **`@fluentui/react-color-picker`** package. It specifically **removes a line of text** from the component's "preview stage" information, as indicated by the changelog entry `change/@fluentui-react-color-picker-874b61c9-eeae-4d2e-a3a1-a8220e5a4154.json`. This is a **documentation maintenance** task aimed at improving the clarity and accuracy of the `react-color-picker` component's usage guidelines for developers.Jun 102maint
26b88c5This commit provides a **bug fix** for the **`react-calendar-compat`** package, specifically addressing an **accessibility issue** within the `CalendarMonth` component. It corrects the `headerAriaLabelFormatString` used by the `getYearStrings` utility, changing it from `yearPickerHeaderAriaLabel` to `monthPickerHeaderAriaLabel`. This ensures that screen readers provide the correct contextual `aria-label` when users are interacting with the year selection header, thereby improving the overall **user experience and accessibility** of the calendar component.Jun 52maint
cabec06This commit provides a **documentation fix** within the **`react-calendar-compat`** package, specifically addressing an issue in the `CalendarMultiDayView.stories.tsx` example. It corrects how options are displayed in a dropdown within the **`CalendarMultiDayView`** story by ensuring the option's value is properly rendered as children of the `Dropdown.Option` component. This **maintenance** change improves the accuracy and functionality of the component's usage example, making the storybook documentation more reliable for developers.May 271maint
1dfab58This commit introduces comprehensive **keyboard accessibility** for the **resizable `Drawer` component** within the **`react-drawer`** package. It enables users to adjust the drawer's size through various methods, including **arrow key adjustments**, a dedicated **input field with validation** for setting width, and a **dialog for precise width input**. This **new feature** significantly enhances the component's usability and accessibility, allowing for more robust interaction without relying solely on mouse input, as demonstrated in the `DrawerResizable.stories.tsx` story file.May 121grow
c6046b9This commit introduces **HEX8 color code support** to the **`react-color-picker`** component, enabling the use of 8-digit hexadecimal values that include an alpha channel. It also resolves a **bug** where the alpha channel was not properly synchronized when the hex color value was modified. These **enhancements** improve the accuracy and flexibility of color input, particularly within the `Default` story example. The changes involve updating the HEX color regex, adjusting input width, and ensuring alpha channel synchronization when the hex value changes in `ColorPickerDefault.stories.tsx`.May 61grow
09f1926This commit **fixes** an issue in the **`ColorArea` component** within the **`@fluentui-react-color-picker` package** by introducing **touch event support**. It refactors the event handling logic in `useColorArea.ts` and `getCoordinates.ts` to utilize `PointerEvent` instead of `MouseEvent`, updating types and tests accordingly. This **enhancement** significantly improves the **usability** and **accessibility** of the color picker for users interacting via touch-enabled devices, ensuring a more consistent experience across input methods.May 213waste
3de1fc1This commit **enhances the `react-drawer` component's documentation** by updating the `DrawerResizable` story. It **replaces the direct drag-to-resize functionality with a new dialog-based input** for precisely setting the drawer's width. This **story enhancement** improves the interactive examples within `DrawerResizable.stories.tsx`, offering developers a more controlled way to test and understand the component's resizing behavior.Apr 281grow
08e7cbdThis commit **enhances the documentation** for the **`react-badge` component** by introducing a new Storybook example. It adds a dedicated story, `BadgeColorVsAppearance.stories.tsx`, to visually demonstrate the various combinations and interactions between the `Badge` component's `color` and `appearance` properties. This **new example** provides clearer guidance for developers on how to effectively style badges, improving the overall usability of the component's documentation. Additionally, a minor reordering of appearance types was made in `BadgeAppearance.stories.tsx` for consistency.Apr 233maint
8adf569This commit introduces a **fix** to the **`@fluentui/react-tags`** package, specifically enhancing the **`Tag` component**. It **increases the clickable area** of `extra-small` tags by 2 pixels from the top and bottom, improving their interactive target size. This adjustment, implemented within the `useRootStyles` function in `useTagStyles.styles.ts`, significantly enhances the **accessibility** and **user experience** for users interacting with these smaller tag elements.Apr 162waste
580d410This commit **fixes a usability issue** in the **`react-drawer` component** by **increasing the target size for its resizable `Drawer`**. It specifically **widens the resizer element** and adds a pseudo-element for a visual border, making it easier for users to interact with and resize the drawer. This **usability improvement** ensures a more forgiving and intuitive experience for users of the `react-drawer` component within the `react-components` package.Apr 161waste
3b6c622This commit implements a **design fix** for the **`ColorSwatch`** component within the **`react-swatch-picker`** package. It specifically **adjusts the styling of the selected state**, particularly for small and extra-small sizes, to improve its visual appearance. The changes are applied in `useColorSwatchStyles.styles.ts`, ensuring a more refined and consistent user experience when interacting with selected color swatches. This update enhances the overall aesthetic and usability of the color selection interface.Apr 102waste
97698e7This commit **updates the documentation** for the **React v9 contribution guide**, specifically the `docs/react-v9/contributing/new-release-process-v9-packages.md` file. It **adds a new TIP block** to provide additional guidance and **corrects project names** within the `yarn nx g` commands used for the release process. This **documentation maintenance** ensures that contributors have accurate and up-to-date instructions for the stable release process, improving the overall clarity and correctness of the contribution workflow.Mar 251maint
c382a75This commit **adds a new migration guide** for the **ColorPicker component** within the React UI library. The documentation, located at `ColorPicker.stories.mdx`, details the necessary changes for developers transitioning their usage of the component **from v8 to v9**. It includes practical examples and comprehensive prop mappings to facilitate a smoother upgrade process. This **documentation update** aims to reduce friction for users adopting the latest version of the component by providing clear instructions for migration.Mar 191maint
18134c1This commit **releases the `ColorPicker` component as stable (v9.0.0)** within the `@fluentui/react-color-picker` package. It **promotes `ColorPicker`, `AlphaSlider`, `ColorArea`, and `ColorSlider` to stable status**, enabling custom style hooks for styling overrides and removing preview-specific performance tests. This involved extensive **refactoring** of file paths, imports, and configuration across the codebase, including storybook files, VR tests, and TypeScript path mappings, to align with the stable package name. Consequently, these stable components are now exported from the main `@fluentui/react-components` package, providing a finalized API for consumers.Mar 18128maint
78f34a9This commit introduces a **new `selected` state** for the **`Tag` and `InteractionTag` components** within the `@fluentui-react-tags` package, enabling users to visually and programmatically indicate selection. This **feature enhancement** adds a `selected` prop to both components and integrates selection logic into the `useTagGroup` and `useInteractionTag` hooks, allowing for controllable selection management. New styles are applied to reflect the `selected` state across `InteractionTagPrimary` and `InteractionTagSecondary` sub-components, enhancing their interactive capabilities. Comprehensive visual regression tests, Cypress tests for `TagGroup` selection, updated API documentation, and new Storybook examples are included to validate and demonstrate this new functionality. This significantly improves the interactivity and state management of tag components, providing a richer user experience.Mar 1429grow
0fbdec7Mar 5

This commit introduces a **new feature** to the **`react-calendar-compat`** package, significantly enhancing keyboard navigation within the **`CalendarDayGrid`** component. Users can now seamlessly navigate to the next date using arrow keys, improving accessibility and overall user experience. The implementation updates the internal arrow navigation group to utilize a `grid-linear` axis for more intuitive movement across the calendar grid. Comprehensive test cases have been added to `CalendarDayGrid.test.tsx` to ensure the correct behavior of this new navigation, including various boundary conditions.

3 filesmaint
3399d8eSep 29

This commit introduces a **new feature** to the **`react-calendar-compat` package**, enabling **reverse date selection** within the `CalendarMultiDayView` component. It modifies the `getDateRangeArray` utility to correctly handle negative `daysToSelectInDayView` values, allowing date ranges to be selected backward from a specified end date. This enhancement provides greater flexibility for users when selecting date ranges. The change includes new unit tests for the updated **date math utilities**, a storybook example demonstrating the new functionality, and **visual regression tests** to ensure the UI behaves as expected.

6 filesmaint
c7c1715Sep 22

This commit introduces a **bug fix** for the **`@fluentui/priority-overflow`** package, resolving an issue where the `overflowMenuSize` was not correctly included in the `occupiedSize` calculation, leading to improper overflow behavior. To facilitate this, a **new feature** was added to the **`@fluentui/react-overflow`** package: a `hasHiddenItems` prop for the `Overflow` component and an option for the `useOverflowContainer` hook. This allows consumers to explicitly indicate when items are initially hidden, ensuring the `createOverflowManager` accurately accounts for the overflow menu's space. The change improves the reliability of overflow components across Fluent UI, with updated API documentation and a `BreadcrumbOverflowExample` story demonstrating its usage.

10 fileswaste
3283edeSep 2

This commit delivers a **bug fix** for the **`react-datepicker-compat`** component, resolving an issue where clicking the date picker's icon would inadvertently trigger the `useOnClickOutside` hook. Previously, this interaction could cause the date picker to immediately close or fail to open correctly after an icon click. The fix involves adding `ev.preventDefault()` to the `onIconClick` handler within `useDatePicker.tsx`, preventing the default event behavior from interfering with the picker's state. This ensures that **clicking the date picker icon** now functions as expected, providing a more reliable user experience for the **date picker component**.

2 fileswaste
b2aff77Aug 19

This commit **improves the developer experience** for the **`@fluentui-react-popover` package** by **updating documentation**. Specifically, it adds a direct link to comprehensive positioning documentation within the JSDoc comment for the `positioning` prop in `PopoverProps` located in `Popover.types.ts`. This **documentation update** ensures that developers can easily access relevant information about how to configure popover positioning directly from their IDEs or generated API docs, streamlining the development process.

2 filesmaint
aba3aaeJun 10

This commit performs a **documentation update** for the **`@fluentui/react-color-picker`** package. It specifically **removes a line of text** from the component's "preview stage" information, as indicated by the changelog entry `change/@fluentui-react-color-picker-874b61c9-eeae-4d2e-a3a1-a8220e5a4154.json`. This is a **documentation maintenance** task aimed at improving the clarity and accuracy of the `react-color-picker` component's usage guidelines for developers.

2 filesmaint
26b88c5Jun 5

This commit provides a **bug fix** for the **`react-calendar-compat`** package, specifically addressing an **accessibility issue** within the `CalendarMonth` component. It corrects the `headerAriaLabelFormatString` used by the `getYearStrings` utility, changing it from `yearPickerHeaderAriaLabel` to `monthPickerHeaderAriaLabel`. This ensures that screen readers provide the correct contextual `aria-label` when users are interacting with the year selection header, thereby improving the overall **user experience and accessibility** of the calendar component.

2 filesmaint
cabec06May 27

This commit provides a **documentation fix** within the **`react-calendar-compat`** package, specifically addressing an issue in the `CalendarMultiDayView.stories.tsx` example. It corrects how options are displayed in a dropdown within the **`CalendarMultiDayView`** story by ensuring the option's value is properly rendered as children of the `Dropdown.Option` component. This **maintenance** change improves the accuracy and functionality of the component's usage example, making the storybook documentation more reliable for developers.

1 filesmaint
1dfab58May 12

This commit introduces comprehensive **keyboard accessibility** for the **resizable `Drawer` component** within the **`react-drawer`** package. It enables users to adjust the drawer's size through various methods, including **arrow key adjustments**, a dedicated **input field with validation** for setting width, and a **dialog for precise width input**. This **new feature** significantly enhances the component's usability and accessibility, allowing for more robust interaction without relying solely on mouse input, as demonstrated in the `DrawerResizable.stories.tsx` story file.

1 filesgrow
c6046b9May 6

This commit introduces **HEX8 color code support** to the **`react-color-picker`** component, enabling the use of 8-digit hexadecimal values that include an alpha channel. It also resolves a **bug** where the alpha channel was not properly synchronized when the hex color value was modified. These **enhancements** improve the accuracy and flexibility of color input, particularly within the `Default` story example. The changes involve updating the HEX color regex, adjusting input width, and ensuring alpha channel synchronization when the hex value changes in `ColorPickerDefault.stories.tsx`.

1 filesgrow
09f1926May 2

This commit **fixes** an issue in the **`ColorArea` component** within the **`@fluentui-react-color-picker` package** by introducing **touch event support**. It refactors the event handling logic in `useColorArea.ts` and `getCoordinates.ts` to utilize `PointerEvent` instead of `MouseEvent`, updating types and tests accordingly. This **enhancement** significantly improves the **usability** and **accessibility** of the color picker for users interacting via touch-enabled devices, ensuring a more consistent experience across input methods.

13 fileswaste
3de1fc1Apr 28

This commit **enhances the `react-drawer` component's documentation** by updating the `DrawerResizable` story. It **replaces the direct drag-to-resize functionality with a new dialog-based input** for precisely setting the drawer's width. This **story enhancement** improves the interactive examples within `DrawerResizable.stories.tsx`, offering developers a more controlled way to test and understand the component's resizing behavior.

1 filesgrow
08e7cbdApr 23

This commit **enhances the documentation** for the **`react-badge` component** by introducing a new Storybook example. It adds a dedicated story, `BadgeColorVsAppearance.stories.tsx`, to visually demonstrate the various combinations and interactions between the `Badge` component's `color` and `appearance` properties. This **new example** provides clearer guidance for developers on how to effectively style badges, improving the overall usability of the component's documentation. Additionally, a minor reordering of appearance types was made in `BadgeAppearance.stories.tsx` for consistency.

3 filesmaint
8adf569Apr 16

This commit introduces a **fix** to the **`@fluentui/react-tags`** package, specifically enhancing the **`Tag` component**. It **increases the clickable area** of `extra-small` tags by 2 pixels from the top and bottom, improving their interactive target size. This adjustment, implemented within the `useRootStyles` function in `useTagStyles.styles.ts`, significantly enhances the **accessibility** and **user experience** for users interacting with these smaller tag elements.

2 fileswaste
580d410Apr 16

This commit **fixes a usability issue** in the **`react-drawer` component** by **increasing the target size for its resizable `Drawer`**. It specifically **widens the resizer element** and adds a pseudo-element for a visual border, making it easier for users to interact with and resize the drawer. This **usability improvement** ensures a more forgiving and intuitive experience for users of the `react-drawer` component within the `react-components` package.

1 fileswaste
3b6c622Apr 10

This commit implements a **design fix** for the **`ColorSwatch`** component within the **`react-swatch-picker`** package. It specifically **adjusts the styling of the selected state**, particularly for small and extra-small sizes, to improve its visual appearance. The changes are applied in `useColorSwatchStyles.styles.ts`, ensuring a more refined and consistent user experience when interacting with selected color swatches. This update enhances the overall aesthetic and usability of the color selection interface.

2 fileswaste
97698e7Mar 25

This commit **updates the documentation** for the **React v9 contribution guide**, specifically the `docs/react-v9/contributing/new-release-process-v9-packages.md` file. It **adds a new TIP block** to provide additional guidance and **corrects project names** within the `yarn nx g` commands used for the release process. This **documentation maintenance** ensures that contributors have accurate and up-to-date instructions for the stable release process, improving the overall clarity and correctness of the contribution workflow.

1 filesmaint
c382a75Mar 19

This commit **adds a new migration guide** for the **ColorPicker component** within the React UI library. The documentation, located at `ColorPicker.stories.mdx`, details the necessary changes for developers transitioning their usage of the component **from v8 to v9**. It includes practical examples and comprehensive prop mappings to facilitate a smoother upgrade process. This **documentation update** aims to reduce friction for users adopting the latest version of the component by providing clear instructions for migration.

1 filesmaint
18134c1Mar 18

This commit **releases the `ColorPicker` component as stable (v9.0.0)** within the `@fluentui/react-color-picker` package. It **promotes `ColorPicker`, `AlphaSlider`, `ColorArea`, and `ColorSlider` to stable status**, enabling custom style hooks for styling overrides and removing preview-specific performance tests. This involved extensive **refactoring** of file paths, imports, and configuration across the codebase, including storybook files, VR tests, and TypeScript path mappings, to align with the stable package name. Consequently, these stable components are now exported from the main `@fluentui/react-components` package, providing a finalized API for consumers.

128 filesmaint
78f34a9Mar 14

This commit introduces a **new `selected` state** for the **`Tag` and `InteractionTag` components** within the `@fluentui-react-tags` package, enabling users to visually and programmatically indicate selection. This **feature enhancement** adds a `selected` prop to both components and integrates selection logic into the `useTagGroup` and `useInteractionTag` hooks, allowing for controllable selection management. New styles are applied to reflect the `selected` state across `InteractionTagPrimary` and `InteractionTagSecondary` sub-components, enhancing their interactive capabilities. Comprehensive visual regression tests, Cypress tests for `TagGroup` selection, updated API documentation, and new Storybook examples are included to validate and demonstrate this new functionality. This significantly improves the interactivity and state management of tag components, providing a richer user experience.

29 filesgrow

Work Patterns

Beta

Commit activity distribution by hour and day of week. Shows when this developer is most active.

Collaboration

Beta

Developers who frequently work on the same files and symbols. Higher score means stronger code collaboration.

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OrganizationsDistributionCompareResearch