Developer
leileizhang
leilzh@microsoft.com
Performance
YoY:+7000%Key patterns and highlights from this developer's activity.
Breakdown of growth, maintenance, and fixes effort over time.
Bugs introduced vs. fixed over time.
Reclassifies engineering effort based on bug attribution. Commits that introduced bugs are retrospectively counted as poor investments.
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.
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.
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
}
]
}Latest analyzed commits from this developer.
| Hash | Message | Date | Files | Effort |
|---|---|---|---|---|
| 1b4641a | This commit implements a crucial **security fix** for the **MarkdownPreviewHandler** within the `previewpane` module. It **restricts external URI navigation** in the Markdown preview pane to only `http` and `https` schemes, preventing arbitrary protocol execution. This change mitigates potential vulnerabilities, such as Remote Code Execution (RCE), that could be exploited through specially crafted links in Markdown files. The fix specifically targets `MarkdownPreviewHandlerControl.cs` to enhance the overall security posture of the preview functionality. | Feb 26 | 1 | waste |
| 5d11e8e | This commit **fixes a bug** preventing `libFuzzer` from resolving the correct target class name within the **Hosts module's fuzz tests**. Previously, the `OneFuzzConfig.json` file incorrectly specified `HostsEditor.FuzzTests.FuzzTests`, leading to test failures. This **maintenance fix** updates the configuration to the correct class name, `Hosts.FuzzTests.FuzzTests`, in `src/modules/Hosts/Hosts.FuzzTests/OneFuzzConfig.json`. This ensures the **Hosts module's fuzz testing** infrastructure operates as intended, improving the reliability of automated security testing. | Feb 25 | 1 | waste |
| 266908c | This commit **fixes** a critical **bug** that caused **Image Resizer** to stop working after **PowerToys upgrades on Windows 10**. The problem arose because the installer's logic prevented the old `PackageIdentityMSIX` (sparse app) from being properly uninstalled during an upgrade, leaving a defunct version on the system. The **fix** modifies the `UninstallPackageIdentityMSIX` condition within `installer/PowerToysSetupVNext/Product.wxs` to ensure the sparse app is always cleaned up during uninstallation or upgrade. This **maintenance** change restores the expected functionality of **Image Resizer** for **Windows 10 users** and improves the overall **upgrade reliability** of PowerToys. | Feb 5 | 2 | waste |
| 2f7fc91 | This commit **fixes a UI bug** in the **PowerToys OOBE (Out-of-Box Experience) pages** where "Launch" or "Open" buttons remained clickable even when their corresponding PowerToys modules were disabled. The **bug fix** introduces checks within the `OnNavigatedTo` event handler for `OobeColorPicker`, `OobeEnvironmentVariables`, `OobeHosts`, `OobeRun`, `OobeRegistryPreview`, and `OobeShortcutGuide` views. This ensures that the **OOBE UI accurately reflects the enabled state of PowerToys modules**, preventing users from attempting to interact with inactive features and improving the overall consistency of the **Settings UI**. | Jan 30 | 12 | waste |
| 2a0d0a1 | This commit introduces a **CI pipeline optimization** to **improve the reliability and speed of the code signing process**. It modifies the `job-build-project.yml` template to **remove the `tests` folder** before the ESRP code signing step. This action drastically **reduces the number of files submitted for signing**, mitigating issues like HTTP 429 throttling, signing operation stalls, and pipeline timeouts. This **maintenance improvement** directly impacts the **build and release infrastructure**, leading to faster and more stable builds by cutting signing time by over 10 minutes. | Jan 21 | 1 | maint |
| b7a94eb | This commit **updates the documentation** in `README.md` to clarify a critical system requirement for a specific feature. It explicitly notes that the **PowerToys extension** functionality within the **Command Palette** is exclusively available on **Windows 11**. This **documentation update** serves as a **maintenance** task, enhancing user understanding of feature compatibility and preventing potential confusion for users on unsupported operating systems. | Jan 21 | 1 | maint |
| 8e2123c | This commit **drafts the release notes** for the upcoming **PowerToys 0.97 release**, updating the `README.md` to reflect the new version's features and download links. This is a **documentation update** that prepares the project's public-facing information for the new release. Additionally, it includes a minor **maintenance update** to the spell-check configuration, adding 'checkmarks' to the exclusion list in `.github/actions/spell-check/expect.txt`. This ensures users have access to the latest changes and download options for the new PowerToys version. | Jan 20 | 2 | maint |
| 3c2cb45 | This commit **temporarily disables** the **AI Super Resolution feature** within the **Image Resizer** module. The change is implemented by wrapping the feature's initialization and detection logic in a conditional compilation block within `src/modules/imageresizer/ui/App.xaml.cs`. This **maintenance** action ensures the feature's code remains intact for future re-enabling, but it will not be available to users in the current release. | Jan 17 | 1 | waste |
| 22ce3b8 | This commit **reverts** the recently added **drag-and-drop functionality** within the **Environment Variables** module. The feature is being removed due to a **WinUI 3 limitation** that prevents drag operations when the application is running with administrator privileges. This change impacts the user experience by no longer allowing reordering of environment variable values via drag-and-drop. Specifically, the UI reverts from a `ListView` to an `ItemsControl` in `EnvironmentVariablesMainPage.xaml`, and the associated drag-and-drop event handlers and related constants are removed from `EnvironmentVariablesMainPage.xaml.cs`. | Jan 13 | 2 | grow |
| 7444835 | This commit **improves the user experience** of the **Peek module** by implementing robust error handling for unsupported virtual folders. Previously, activating Peek in folders like Home or Recent would result in a stuck loading state or an incorrect "Search in Microsoft Store" prompt; now, users will see a clear "No files selected or this folder is not supported for preview" message. This **bug fix** prevents misleading UI behavior by hiding the `FilePreview` control and automatically closing the Peek window when the error `InfoBar` is dismissed. The changes primarily affect the **Peek UI's initialization and error display logic**, ensuring a more predictable and user-friendly interaction when the Shell API returns no selected items. | Jan 13 | 4 | grow |
| b68b845 | This commit provides a **maintenance fix** by **upgrading the ESRP Code Signing task** within the project's **CI/CD pipelines**. It updates the `EsrpCodeSigning` task from version 5 to version 6 in the `.pipelines/v2/templates/steps-esrp-signing.yml` template. This change is crucial as the previous version was encountering a **Node 16 End-of-Life dependency**, which was actively **blocking the application's code signing process**. By performing this upgrade, the commit resolves the signing blockage, ensuring the continued successful build and release of the application. | Jan 13 | 1 | maint |
| 8b79da5 | This commit **fixes a critical bug** in the **Image Resizer UI** that caused an `ArgumentOutOfRangeException` when `CustomSize` or `AiSize` properties were modified, preventing the feature from working correctly. The **bug fix** was implemented by changing the collection changed notification from `Replace` to `Reset` for these properties within `src/modules/imageresizer/ui/Properties/Settings.cs`. While `Reset` is less efficient, it resolves the underlying index validation issue, ensuring the **Image Resizer UI** functions reliably for users managing custom image sizes. Additionally, this commit includes a **maintenance update** to the **Image Resizer CLI**'s logging folder path and an **adjustment to related tests** to reflect the new notification behavior. | Jan 13 | 3 | waste |
| c88fe1f | This commit significantly **improves the usability and robustness of the FancyZones CLI** by addressing several key areas. It **fixes a bug** related to GUID parsing, allowing users to pass GUIDs without braces and providing friendly error messages when PowerShell incorrectly interprets `{GUID}` as a script block, primarily affecting the `SetHotkeyCommand` and `SetLayoutCommand`. Additionally, the **command-line interface is enhanced** with the introduction of `--help` support for individual subcommands, making it easier to discover and understand specific command options. These **usability improvements** streamline interaction with the `FancyZonesCLI` module, particularly for PowerShell users, by making it more forgiving and informative. | Jan 12 | 7 | grow |
| 876130c | This commit delivers a critical **security fix** for the **Peek file previewer**, resolving Local File Inclusion (LFI) and Remote Code Execution (RCE) vulnerabilities. It introduces strict resource filtering within the `BrowserControl` to block external content loading and XSS attacks, while safely re-enabling HTML rendering for local Markdown files. The previewer logic is **refactored** to dynamically apply security contexts based on file type, ensuring robust protection against malicious content. Additionally, the "Open URI" dialog receives **UI enhancements** with clearer warnings, significantly improving the security and user experience of **Peek**'s preview functionality when interacting with external links. | Jan 8 | 5 | waste |
| 03d1dfc | This commit **fixes a build failure** within the **UI tests pipeline** by updating its configuration. Specifically, the `.pipelines/v2/templates/job-build-ui-tests.yml` file is modified to use an `MSBuild` task for NuGet package restoration, replacing the problematic `NuGetCommand` task. This **maintenance update** resolves a critical issue that was preventing UI tests from building successfully. The change ensures the stability and reliability of the **CI/CD process** for UI test validation, allowing for consistent and accurate test execution. | Jan 7 | 1 | waste |
| 673cd5a | This commit introduces a **new command-line interface (CLI) executable** (`PowerToys.ImageResizerCLI.exe`) for the **Image Resizer** module, providing a programmatic and scriptable method for image resizing. This **new capability** allows users to automate image manipulation with extensive options, including specifying dimensions, fit mode, quality, output directory, and metadata handling, directly from the command line. The implementation involves a dedicated CLI project with classes like `CliOptions`, `CliSettingsApplier`, and `ImageResizerCliExecutor`, alongside updates to the core `ResizeBatch` logic for seamless integration. This significantly enhances the **Image Resizer**'s utility by enabling advanced automation workflows and integration into other tools. | Dec 26 | 35 | grow |
| 3f10634 | This commit **adds comprehensive localization and telemetry support** to the **FancyZones CLI**. It **enhances the user experience for international users** by ensuring all command descriptions, arguments, output, and error messages are now **localizable** through `Properties.Resources`. Concurrently, a new **telemetry event** (`FancyZonesCLICommandEvent`) is introduced to **track command execution**, providing valuable insights into CLI usage patterns. This **feature addition** impacts nearly all existing FancyZones CLI commands, making them more accessible and their usage more transparent for product improvement. | Dec 25 | 16 | grow |
| dd138fb | This commit significantly **refactors** the **FancyZones CLI** to utilize `System.CommandLine`, providing a more robust and extensible command-line interface. It introduces numerous **new CLI commands** for managing layouts, hotkeys, monitors, and interacting with the FancyZones editor and settings. Crucially, all **FancyZones configuration data I/O** is now centralized through `FancyZonesEditorCommon`'s new `FancyZonesDataIO` utility and `FancyZonesPaths`, ensuring consistent serialization and file paths are shared between the CLI and the FancyZones Editor. This **enhancement** improves data integrity, maintainability, and expands the programmatic control over **FancyZones** functionality. | Dec 19 | 37 | grow |
| 4b2ee60 | This commit provides a **bug fix** for the **Advanced Paste** feature's AI provider settings, addressing an issue where non-endpoint-requiring providers like Google/Gemini would incorrectly persist an Azure OpenAI placeholder endpoint. It **refactors** the `AdvancedPastePage.xaml.cs` file by centralizing the logic for determining if an AI service type requires an endpoint into a new `RequiresEndpointForService` helper method. This ensures that the `endpoint-url` is explicitly cleared on save for services that do not use an endpoint, preventing stale or irrelevant data from being written to `settings.json` and improving the robustness of **Advanced Paste** AI provider configuration. | Dec 15 | 1 | waste |
| 4de4d5f | This commit provides a **bug fix** for the **Advanced Paste** module, specifically addressing an issue where selecting an item from the clipboard history would inadvertently create a duplicate entry at the top of the list. The problem stemmed from `ClipboardHistory_ItemInvoked` using `ClipboardHelper.SetTextContent()` or `ClipboardHelper.SetImageContent()`, which internally generated a new history entry. The **solution** involves updating `MainPage.xaml.cs` to utilize `Clipboard.SetHistoryItemAsContent()` instead, ensuring that existing history items are set as content without creating redundant entries. This change significantly improves the usability and integrity of the **Advanced Paste** clipboard history, allowing users to manage and delete items correctly. | Dec 11 | 1 | waste |
This commit implements a crucial **security fix** for the **MarkdownPreviewHandler** within the `previewpane` module. It **restricts external URI navigation** in the Markdown preview pane to only `http` and `https` schemes, preventing arbitrary protocol execution. This change mitigates potential vulnerabilities, such as Remote Code Execution (RCE), that could be exploited through specially crafted links in Markdown files. The fix specifically targets `MarkdownPreviewHandlerControl.cs` to enhance the overall security posture of the preview functionality.
This commit **fixes a bug** preventing `libFuzzer` from resolving the correct target class name within the **Hosts module's fuzz tests**. Previously, the `OneFuzzConfig.json` file incorrectly specified `HostsEditor.FuzzTests.FuzzTests`, leading to test failures. This **maintenance fix** updates the configuration to the correct class name, `Hosts.FuzzTests.FuzzTests`, in `src/modules/Hosts/Hosts.FuzzTests/OneFuzzConfig.json`. This ensures the **Hosts module's fuzz testing** infrastructure operates as intended, improving the reliability of automated security testing.
This commit **fixes** a critical **bug** that caused **Image Resizer** to stop working after **PowerToys upgrades on Windows 10**. The problem arose because the installer's logic prevented the old `PackageIdentityMSIX` (sparse app) from being properly uninstalled during an upgrade, leaving a defunct version on the system. The **fix** modifies the `UninstallPackageIdentityMSIX` condition within `installer/PowerToysSetupVNext/Product.wxs` to ensure the sparse app is always cleaned up during uninstallation or upgrade. This **maintenance** change restores the expected functionality of **Image Resizer** for **Windows 10 users** and improves the overall **upgrade reliability** of PowerToys.
This commit **fixes a UI bug** in the **PowerToys OOBE (Out-of-Box Experience) pages** where "Launch" or "Open" buttons remained clickable even when their corresponding PowerToys modules were disabled. The **bug fix** introduces checks within the `OnNavigatedTo` event handler for `OobeColorPicker`, `OobeEnvironmentVariables`, `OobeHosts`, `OobeRun`, `OobeRegistryPreview`, and `OobeShortcutGuide` views. This ensures that the **OOBE UI accurately reflects the enabled state of PowerToys modules**, preventing users from attempting to interact with inactive features and improving the overall consistency of the **Settings UI**.
This commit introduces a **CI pipeline optimization** to **improve the reliability and speed of the code signing process**. It modifies the `job-build-project.yml` template to **remove the `tests` folder** before the ESRP code signing step. This action drastically **reduces the number of files submitted for signing**, mitigating issues like HTTP 429 throttling, signing operation stalls, and pipeline timeouts. This **maintenance improvement** directly impacts the **build and release infrastructure**, leading to faster and more stable builds by cutting signing time by over 10 minutes.
This commit **updates the documentation** in `README.md` to clarify a critical system requirement for a specific feature. It explicitly notes that the **PowerToys extension** functionality within the **Command Palette** is exclusively available on **Windows 11**. This **documentation update** serves as a **maintenance** task, enhancing user understanding of feature compatibility and preventing potential confusion for users on unsupported operating systems.
This commit **drafts the release notes** for the upcoming **PowerToys 0.97 release**, updating the `README.md` to reflect the new version's features and download links. This is a **documentation update** that prepares the project's public-facing information for the new release. Additionally, it includes a minor **maintenance update** to the spell-check configuration, adding 'checkmarks' to the exclusion list in `.github/actions/spell-check/expect.txt`. This ensures users have access to the latest changes and download options for the new PowerToys version.
This commit **temporarily disables** the **AI Super Resolution feature** within the **Image Resizer** module. The change is implemented by wrapping the feature's initialization and detection logic in a conditional compilation block within `src/modules/imageresizer/ui/App.xaml.cs`. This **maintenance** action ensures the feature's code remains intact for future re-enabling, but it will not be available to users in the current release.
This commit **reverts** the recently added **drag-and-drop functionality** within the **Environment Variables** module. The feature is being removed due to a **WinUI 3 limitation** that prevents drag operations when the application is running with administrator privileges. This change impacts the user experience by no longer allowing reordering of environment variable values via drag-and-drop. Specifically, the UI reverts from a `ListView` to an `ItemsControl` in `EnvironmentVariablesMainPage.xaml`, and the associated drag-and-drop event handlers and related constants are removed from `EnvironmentVariablesMainPage.xaml.cs`.
This commit **improves the user experience** of the **Peek module** by implementing robust error handling for unsupported virtual folders. Previously, activating Peek in folders like Home or Recent would result in a stuck loading state or an incorrect "Search in Microsoft Store" prompt; now, users will see a clear "No files selected or this folder is not supported for preview" message. This **bug fix** prevents misleading UI behavior by hiding the `FilePreview` control and automatically closing the Peek window when the error `InfoBar` is dismissed. The changes primarily affect the **Peek UI's initialization and error display logic**, ensuring a more predictable and user-friendly interaction when the Shell API returns no selected items.
This commit provides a **maintenance fix** by **upgrading the ESRP Code Signing task** within the project's **CI/CD pipelines**. It updates the `EsrpCodeSigning` task from version 5 to version 6 in the `.pipelines/v2/templates/steps-esrp-signing.yml` template. This change is crucial as the previous version was encountering a **Node 16 End-of-Life dependency**, which was actively **blocking the application's code signing process**. By performing this upgrade, the commit resolves the signing blockage, ensuring the continued successful build and release of the application.
This commit **fixes a critical bug** in the **Image Resizer UI** that caused an `ArgumentOutOfRangeException` when `CustomSize` or `AiSize` properties were modified, preventing the feature from working correctly. The **bug fix** was implemented by changing the collection changed notification from `Replace` to `Reset` for these properties within `src/modules/imageresizer/ui/Properties/Settings.cs`. While `Reset` is less efficient, it resolves the underlying index validation issue, ensuring the **Image Resizer UI** functions reliably for users managing custom image sizes. Additionally, this commit includes a **maintenance update** to the **Image Resizer CLI**'s logging folder path and an **adjustment to related tests** to reflect the new notification behavior.
This commit significantly **improves the usability and robustness of the FancyZones CLI** by addressing several key areas. It **fixes a bug** related to GUID parsing, allowing users to pass GUIDs without braces and providing friendly error messages when PowerShell incorrectly interprets `{GUID}` as a script block, primarily affecting the `SetHotkeyCommand` and `SetLayoutCommand`. Additionally, the **command-line interface is enhanced** with the introduction of `--help` support for individual subcommands, making it easier to discover and understand specific command options. These **usability improvements** streamline interaction with the `FancyZonesCLI` module, particularly for PowerShell users, by making it more forgiving and informative.
This commit delivers a critical **security fix** for the **Peek file previewer**, resolving Local File Inclusion (LFI) and Remote Code Execution (RCE) vulnerabilities. It introduces strict resource filtering within the `BrowserControl` to block external content loading and XSS attacks, while safely re-enabling HTML rendering for local Markdown files. The previewer logic is **refactored** to dynamically apply security contexts based on file type, ensuring robust protection against malicious content. Additionally, the "Open URI" dialog receives **UI enhancements** with clearer warnings, significantly improving the security and user experience of **Peek**'s preview functionality when interacting with external links.
This commit **fixes a build failure** within the **UI tests pipeline** by updating its configuration. Specifically, the `.pipelines/v2/templates/job-build-ui-tests.yml` file is modified to use an `MSBuild` task for NuGet package restoration, replacing the problematic `NuGetCommand` task. This **maintenance update** resolves a critical issue that was preventing UI tests from building successfully. The change ensures the stability and reliability of the **CI/CD process** for UI test validation, allowing for consistent and accurate test execution.
This commit introduces a **new command-line interface (CLI) executable** (`PowerToys.ImageResizerCLI.exe`) for the **Image Resizer** module, providing a programmatic and scriptable method for image resizing. This **new capability** allows users to automate image manipulation with extensive options, including specifying dimensions, fit mode, quality, output directory, and metadata handling, directly from the command line. The implementation involves a dedicated CLI project with classes like `CliOptions`, `CliSettingsApplier`, and `ImageResizerCliExecutor`, alongside updates to the core `ResizeBatch` logic for seamless integration. This significantly enhances the **Image Resizer**'s utility by enabling advanced automation workflows and integration into other tools.
This commit **adds comprehensive localization and telemetry support** to the **FancyZones CLI**. It **enhances the user experience for international users** by ensuring all command descriptions, arguments, output, and error messages are now **localizable** through `Properties.Resources`. Concurrently, a new **telemetry event** (`FancyZonesCLICommandEvent`) is introduced to **track command execution**, providing valuable insights into CLI usage patterns. This **feature addition** impacts nearly all existing FancyZones CLI commands, making them more accessible and their usage more transparent for product improvement.
This commit significantly **refactors** the **FancyZones CLI** to utilize `System.CommandLine`, providing a more robust and extensible command-line interface. It introduces numerous **new CLI commands** for managing layouts, hotkeys, monitors, and interacting with the FancyZones editor and settings. Crucially, all **FancyZones configuration data I/O** is now centralized through `FancyZonesEditorCommon`'s new `FancyZonesDataIO` utility and `FancyZonesPaths`, ensuring consistent serialization and file paths are shared between the CLI and the FancyZones Editor. This **enhancement** improves data integrity, maintainability, and expands the programmatic control over **FancyZones** functionality.
This commit provides a **bug fix** for the **Advanced Paste** feature's AI provider settings, addressing an issue where non-endpoint-requiring providers like Google/Gemini would incorrectly persist an Azure OpenAI placeholder endpoint. It **refactors** the `AdvancedPastePage.xaml.cs` file by centralizing the logic for determining if an AI service type requires an endpoint into a new `RequiresEndpointForService` helper method. This ensures that the `endpoint-url` is explicitly cleared on save for services that do not use an endpoint, preventing stale or irrelevant data from being written to `settings.json` and improving the robustness of **Advanced Paste** AI provider configuration.
This commit provides a **bug fix** for the **Advanced Paste** module, specifically addressing an issue where selecting an item from the clipboard history would inadvertently create a duplicate entry at the top of the list. The problem stemmed from `ClipboardHistory_ItemInvoked` using `ClipboardHelper.SetTextContent()` or `ClipboardHelper.SetImageContent()`, which internally generated a new history entry. The **solution** involves updating `MainPage.xaml.cs` to utilize `Clipboard.SetHistoryItemAsContent()` instead, ensuring that existing history items are set as content without creating redundant entries. This change significantly improves the usability and integrity of the **Advanced Paste** clipboard history, allowing users to manage and delete items correctly.
Commit activity distribution by hour and day of week. Shows when this developer is most active.
Developers who frequently work on the same files and symbols. Higher score means stronger code collaboration.