Khan/perseus
Nov 2024 – Mar 2026
16 Months active
Languages Used
JSONJavaScriptLessTypeScripttsxCSStsMarkdown
Technical Skills
Backend DevelopmentCode RefactoringFrontend DevelopmentFull Stack DevelopmentJavaScriptJest
Sarah Third
PROFILE
Sarah Third
Sarah Third contributed to the Khan/perseus repository by building and modernizing interactive educational widgets, focusing on reliability, accessibility, and internationalization. She refactored core components like the Radio and Numeric Input widgets using React and TypeScript, migrating legacy code to functional paradigms and improving test coverage with Jest and Storybook. Her work included implementing locale-aware input parsing, enhancing server-side scoring APIs, and introducing robust debugging tools to streamline development and QA. By addressing cross-platform issues, such as iOS touch handling and accessibility font scaling, Sarah delivered maintainable solutions that improved user experience, reduced technical debt, and enabled scalable, accurate content validation.
Overall Statistics
Feature vs Bugs
58%Features
Repository Contributions
92Total
Bugs
23
Commits
92
Features
32
Lines of code
68,780
Activity Months16
Your Network
54 peopleWork History
March 2026
3 Commits • 2 Features
Mar 1, 2026March 2026: Khan/perseus monthly summary focusing on delivering a more accurate Expression Widget validation, stabilizing graph interaction on iOS Safari, and keeping dependencies up to date. Key outcomes: more nuanced grading feedback for Expression Widget; robust iOS Safari phantom-click protection; updated dependencies for compatibility, security, and performance. All tests pass; changes are well-documented and traceable via PRs.
3 Commits • 2 Features
Mar 1, 2026March 2026: Khan/perseus monthly summary focusing on delivering a more accurate Expression Widget validation, stabilizing graph interaction on iOS Safari, and keeping dependencies up to date. Key outcomes: more nuanced grading feedback for Expression Widget; robust iOS Safari phantom-click protection; updated dependencies for compatibility, security, and performance. All tests pass; changes are well-documented and traceable via PRs.
March 2026
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for Khan/perseus focused on reliability and accessibility improvements in interactive graph widgets. Delivered a bug fix for iOS where touch coordinates could be misaligned under accessibility font scaling. Implemented a cumulative zoom factor utility to decouple SVG coordinate calculations from UI zoom, ensuring accurate point positioning during add/drag actions. PR #3221 (commit 131d5e6688a1ba5d70f383538022a39d63afac15) with cross-platform validation and all existing tests passing.
February 2026
1 Commits
Feb 1, 2026February 2026 monthly summary for Khan/perseus focused on reliability and accessibility improvements in interactive graph widgets. Delivered a bug fix for iOS where touch coordinates could be misaligned under accessibility font scaling. Implemented a cumulative zoom factor utility to decouple SVG coordinate calculations from UI zoom, ensuring accurate point positioning during add/drag actions. PR #3221 (commit 131d5e6688a1ba5d70f383538022a39d63afac15) with cross-platform validation and all existing tests passing.
December 2025
3 Commits • 2 Features
Dec 1, 2025December 2025 — Khan/perseus: Key deliverables focused on server-side scoring architecture and scoring accuracy improvements. Delivered Perseus Core Server-Side Scoring API and Dependency Synchronization by moving Khanmigo data functions into Perseus Core to support server-side scoring and aligning dependencies across the codebase. Implemented Widget Scoring Logic Enhancement with isScorable, removing the previous scoreNoop behavior to improve scoring accuracy and determinism. Major bugs fixed: none reported this month. Overall impact: consolidated data handling and dependencies into Perseus Core, enabling a scalable, maintainable scoring pathway and reducing cross-repo drift. Technologies/skills demonstrated: backend consolidation, server-side scoring design, dependency management, code refactoring for isScorable logic, and cross-repo collaboration.
3 Commits • 2 Features
Dec 1, 2025December 2025 — Khan/perseus: Key deliverables focused on server-side scoring architecture and scoring accuracy improvements. Delivered Perseus Core Server-Side Scoring API and Dependency Synchronization by moving Khanmigo data functions into Perseus Core to support server-side scoring and aligning dependencies across the codebase. Implemented Widget Scoring Logic Enhancement with isScorable, removing the previous scoreNoop behavior to improve scoring accuracy and determinism. Major bugs fixed: none reported this month. Overall impact: consolidated data handling and dependencies into Perseus Core, enabling a scalable, maintainable scoring pathway and reducing cross-repo drift. Technologies/skills demonstrated: backend consolidation, server-side scoring design, dependency management, code refactoring for isScorable logic, and cross-repo collaboration.
December 2025
November 2025
6 Commits • 1 Features
Nov 1, 2025November 2025: Delivered key editor improvements and stability fixes in Khan/perseus, enabling content backfill control with Editing Disabled, stabilizing test data for Chromatic, addressing cursor reliability in editors, and updating dependencies for release readiness. These changes reduce editing risks during backfills, decrease flaky UI tests, and improve release confidence and developer velocity.
November 2025
6 Commits • 1 Features
Nov 1, 2025November 2025: Delivered key editor improvements and stability fixes in Khan/perseus, enabling content backfill control with Editing Disabled, stabilizing test data for Chromatic, addressing cursor reliability in editors, and updating dependencies for release readiness. These changes reduce editing risks during backfills, decrease flaky UI tests, and improve release confidence and developer velocity.
October 2025
4 Commits • 2 Features
Oct 1, 2025Month 2025-10: Delivered stability enhancements and locale-aware UI improvements in Khan/perseus, driving reliability, better UX on iOS, and cleaner code for future work. Focused on cross-platform stability, locale-specific rendering, and widget lifecycle improvements to reduce maintenance overhead and accelerate upcoming features.
4 Commits • 2 Features
Oct 1, 2025Month 2025-10: Delivered stability enhancements and locale-aware UI improvements in Khan/perseus, driving reliability, better UX on iOS, and cleaner code for future work. Focused on cross-platform stability, locale-specific rendering, and widget lifecycle improvements to reduce maintenance overhead and accelerate upcoming features.
October 2025
September 2025
3 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for Khan/perseus: Delivered key frontend reliability and internationalization enhancements, focusing on robust input handling, locale-aware parsing, and improved component interoperability. Implemented a fix for RadioNew ref propagation in getPromptJSON, integrated the Unified User Input Manager into Explanation and Number Line widgets to stabilize input handling for nested scorable widgets, and added locale-aware support for colon as a division symbol in the Expression Widget with accompanying tests. These changes reduce runtime errors, improve user input fidelity, and enable correct locale-specific expression evaluation across locales, supported by updated documentation changesets.
September 2025
3 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for Khan/perseus: Delivered key frontend reliability and internationalization enhancements, focusing on robust input handling, locale-aware parsing, and improved component interoperability. Implemented a fix for RadioNew ref propagation in getPromptJSON, integrated the Unified User Input Manager into Explanation and Number Line widgets to stabilize input handling for nested scorable widgets, and added locale-aware support for colon as a division symbol in the Expression Widget with accompanying tests. These changes reduce runtime errors, improve user input fidelity, and enable correct locale-specific expression evaluation across locales, supported by updated documentation changesets.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for Khan/perseus: Key feature delivery around the Radio Widget including Storybook documentation, regression tests, and a functional API exposure. Major refactor migrated the Radio widget (MultipleChoiceWidget) from a class component to a forwardRef/useImperativeHandle-enabled functional component to support an imperative API (getPromptJSON) for improved Perseus integration. Also reorganized widget stories, added subpages for testing, and enhanced Storybook documentation to streamline QA and onboarding. No explicit major bugs reported in the period; the focus was on feature delivery and test coverage to reduce risk.
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for Khan/perseus: Key feature delivery around the Radio Widget including Storybook documentation, regression tests, and a functional API exposure. Major refactor migrated the Radio widget (MultipleChoiceWidget) from a class component to a forwardRef/useImperativeHandle-enabled functional component to support an imperative API (getPromptJSON) for improved Perseus integration. Also reorganized widget stories, added subpages for testing, and enhanced Storybook documentation to streamline QA and onboarding. No explicit major bugs reported in the period; the focus was on feature delivery and test coverage to reduce risk.
August 2025
July 2025
9 Commits • 3 Features
Jul 1, 2025July 2025 Monthly Summary — Khan/perseus: Delivered targeted feature improvements, fixed critical correctness and localization issues, and enhanced stability through code modernization and dependency updates. Overall impact includes improved user scoring reliability, more robust widget behavior, and reduced maintenance risk.
July 2025
9 Commits • 3 Features
Jul 1, 2025July 2025 Monthly Summary — Khan/perseus: Delivered targeted feature improvements, fixed critical correctness and localization issues, and enhanced stability through code modernization and dependency updates. Overall impact includes improved user scoring reliability, more robust widget behavior, and reduced maintenance risk.
June 2025
6 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for Khan/perseus focusing on business value and technical achievements. Highlights include delivering reliability and UX improvements for the Radio Widget, unifying feedback display across widgets, and enhancing debugging/testing tooling to accelerate bug reproduction and validation.
6 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for Khan/perseus focusing on business value and technical achievements. Highlights include delivering reliability and UX improvements for the Radio Widget, unifying feedback display across widgets, and enhancing debugging/testing tooling to accelerate bug reproduction and validation.
June 2025
May 2025
7 Commits • 2 Features
May 1, 2025In May 2025, Khan/perseus delivered critical UI/UX improvements, stability fixes, and quality enhancements that boost maintainability, user experience on mobile, and reliability of interactive components.
May 2025
7 Commits • 2 Features
May 1, 2025In May 2025, Khan/perseus delivered critical UI/UX improvements, stability fixes, and quality enhancements that boost maintainability, user experience on mobile, and reliability of interactive components.
April 2025
3 Commits • 2 Features
Apr 1, 2025April 2025 (Khan/perseus) monthly summary focusing on business value and technical achievements. Key features delivered: - Interactive Graph Widget: added parsing and validation for labelLocation with allowed values 'onAxis' and 'alongEdge'; introduced tests to validate parsing and prevent invalid inputs. This enables consistent widget behavior across edge cases and reduces QA overhead. Commits: 3cdf61b091393f6728dfdb8a460c6dd2f4909daa (#2362). - Radio Widget Revitalization: introduced a dedicated feature flag to isolate forthcoming work on the new radio widget, added new files and a Storybook page for isolated testing and PoC development without impacting existing designs. Commits: 87558715e33f9e45436bd48fb1b3401aa7fb26b6 (#2399). Major bugs fixed: - Clamp graph axis labels within boundaries: ensured ClampLabelPosition keeps axis labels inside graph boundaries to prevent labels from extending beyond the intended area, improving visual alignment. Commits: 865844cf86f20babe8f4425c366811992d7ab0c6 (#2299). Overall impact and accomplishments: - Improved UI reliability and visual consistency for the Interactive Graph and the upcoming Radio Widget, enabling faster iteration cycles and reducing post-release QA time. The feature flag and isolated Storybook setup reduce risk when experimenting with the new widget, while tests provide regression protection for critical graph behaviors. Technologies/skills demonstrated: - Feature flags for safe isolation of new components, Storybook for isolated UI testing, and test-driven validation for parsing logic.
3 Commits • 2 Features
Apr 1, 2025April 2025 (Khan/perseus) monthly summary focusing on business value and technical achievements. Key features delivered: - Interactive Graph Widget: added parsing and validation for labelLocation with allowed values 'onAxis' and 'alongEdge'; introduced tests to validate parsing and prevent invalid inputs. This enables consistent widget behavior across edge cases and reduces QA overhead. Commits: 3cdf61b091393f6728dfdb8a460c6dd2f4909daa (#2362). - Radio Widget Revitalization: introduced a dedicated feature flag to isolate forthcoming work on the new radio widget, added new files and a Storybook page for isolated testing and PoC development without impacting existing designs. Commits: 87558715e33f9e45436bd48fb1b3401aa7fb26b6 (#2399). Major bugs fixed: - Clamp graph axis labels within boundaries: ensured ClampLabelPosition keeps axis labels inside graph boundaries to prevent labels from extending beyond the intended area, improving visual alignment. Commits: 865844cf86f20babe8f4425c366811992d7ab0c6 (#2299). Overall impact and accomplishments: - Improved UI reliability and visual consistency for the Interactive Graph and the upcoming Radio Widget, enabling faster iteration cycles and reducing post-release QA time. The feature flag and isolated Storybook setup reduce risk when experimenting with the new widget, while tests provide regression protection for critical graph behaviors. Technologies/skills demonstrated: - Feature flags for safe isolation of new components, Storybook for isolated UI testing, and test-driven validation for parsing logic.
April 2025
March 2025
10 Commits • 4 Features
Mar 1, 2025March 2025 (2025-03) for Khan/perseus focused on UX improvements, accessibility enhancements, and robustness across interactive widgets, while validating rapid iteration with a prototype feature. A provisional Interactive Graph labelLocation feature was introduced and rolled back after deployment issues, illustrating our ability to test, revert, and improve rollout processes. Notable UX gains include touch-focused focus on dragged points, and accessibility/testing improvements across Image Widget and InputWithExamples. A suite of bug fixes strengthened stability and correctness across Graph, Grapher, Radio, and keypad widgets, reducing regressions and improving end-user reliability. The work demonstrates strong collaboration, release hygiene with changesets, and a track record of delivering business value through tangible product quality improvements.
March 2025
10 Commits • 4 Features
Mar 1, 2025March 2025 (2025-03) for Khan/perseus focused on UX improvements, accessibility enhancements, and robustness across interactive widgets, while validating rapid iteration with a prototype feature. A provisional Interactive Graph labelLocation feature was introduced and rolled back after deployment issues, illustrating our ability to test, revert, and improve rollout processes. Notable UX gains include touch-focused focus on dragged points, and accessibility/testing improvements across Image Widget and InputWithExamples. A suite of bug fixes strengthened stability and correctness across Graph, Grapher, Radio, and keypad widgets, reducing regressions and improving end-user reliability. The work demonstrates strong collaboration, release hygiene with changesets, and a track record of delivering business value through tangible product quality improvements.
February 2025
13 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for Khan/perseus focusing on reliability, UX, and maintainability improvements across features and bugs. Delivered a set of UX/stability enhancements for Numeric Input, enhancements to interactive graphs, and a system-wide tooltip upgrade, while tightening CI/branch hygiene to ensure stable and repeatable releases. These efforts reduce user errors, improve accessibility and keyboard navigation, and enable faster iteration cycles for high-quality math tooling. Technical accomplishments span frontend UX refinements, localization support, robust testing and snapshot updates, and improved release hygiene. Overall impact: improved user satisfaction, lower support risk for input-related issues, and stronger foundation for future feature work.
13 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for Khan/perseus focusing on reliability, UX, and maintainability improvements across features and bugs. Delivered a set of UX/stability enhancements for Numeric Input, enhancements to interactive graphs, and a system-wide tooltip upgrade, while tightening CI/branch hygiene to ensure stable and repeatable releases. These efforts reduce user errors, improve accessibility and keyboard navigation, and enable faster iteration cycles for high-quality math tooling. Technical accomplishments span frontend UX refinements, localization support, robust testing and snapshot updates, and improved release hygiene. Overall impact: improved user satisfaction, lower support risk for input-related issues, and stronger foundation for future feature work.
February 2025
January 2025
9 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for Khan/perseus highlighting key features delivered, major bugs fixed, and overall impact. The month focused on accessibility enhancements, rendering reliability after Lingui migration, and strengthening the developer experience through UI modernization and testing infrastructure. The work aligns with business value by improving user interaction with media, ensuring robust mathematical content rendering, and accelerating iterative development.
January 2025
9 Commits • 2 Features
Jan 1, 2025January 2025 monthly summary for Khan/perseus highlighting key features delivered, major bugs fixed, and overall impact. The month focused on accessibility enhancements, rendering reliability after Lingui migration, and strengthening the developer experience through UI modernization and testing infrastructure. The work aligns with business value by improving user interaction with media, ensuring robust mathematical content rendering, and accelerating iterative development.
December 2024
5 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Khan/perseus. Focused on accessibility, graphie image loading, and unblocking Perseus. Key outcomes include preserving image alt text during zoom, hiding non-essential elements from screen readers, introducing loadGraphie to fetch/parse graphie data including localized variants, refactoring SvgImage to adopt the new loader, and safe revert of previous svg-image changes to unblock Perseus. The work was accompanied by comprehensive tests across graphie parsing and localization, improving reliability and internationalization readiness. Overall, these efforts enhanced accessibility, localization support, and developer velocity while reducing blockages to Perseus development.
5 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for Khan/perseus. Focused on accessibility, graphie image loading, and unblocking Perseus. Key outcomes include preserving image alt text during zoom, hiding non-essential elements from screen readers, introducing loadGraphie to fetch/parse graphie data including localized variants, refactoring SvgImage to adopt the new loader, and safe revert of previous svg-image changes to unblock Perseus. The work was accompanied by comprehensive tests across graphie parsing and localization, improving reliability and internationalization readiness. Overall, these efforts enhanced accessibility, localization support, and developer velocity while reducing blockages to Perseus development.
December 2024
November 2024
8 Commits • 1 Features
Nov 1, 2024Concise monthly summary for Khan/perseus (2024-11): Delivered a migration of input handling from the deprecated input-number widget to numeric-input, including content conversion, test updates, and UI/UX improvements (editor alert about conversions). Implemented migration-related testing enhancements and maintained user-facing clarity during the transition. Conducted technical cleanup by removing unused MathJax 2 initialization logic. Addressed migration risks by rolling back input-number conversion changes and server-side scoring adjustments to unblock Perseus and restore stability. Improved widget consistency by aligning UserInput and Rubric widget keys. Overall, improved maintainability, reduced technical debt, and preserved product stability during a high-risk migration, setting the stage for a forward-looking numeric-input path.
November 2024
8 Commits • 1 Features
Nov 1, 2024Concise monthly summary for Khan/perseus (2024-11): Delivered a migration of input handling from the deprecated input-number widget to numeric-input, including content conversion, test updates, and UI/UX improvements (editor alert about conversions). Implemented migration-related testing enhancements and maintained user-facing clarity during the transition. Conducted technical cleanup by removing unused MathJax 2 initialization logic. Addressed migration risks by rolling back input-number conversion changes and server-side scoring adjustments to unblock Perseus and restore stability. Improved widget consistency by aligning UserInput and Rubric widget keys. Overall, improved maintainability, reduced technical debt, and preserved product stability during a high-risk migration, setting the stage for a forward-looking numeric-input path.
Activity
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Quality Metrics
Correctness91.6%
Maintainability88.0%
Architecture85.4%
Performance84.0%
AI Usage21.6%
Skills & Technologies
Programming Languages
CSSHTMLJSONJavaScriptLessMarkdownTypeScriptYAMLtstsx
Technical Skills
API developmentAccessibilityBackend DevelopmentBug FixBug FixingCSSCSS ModulesCode MigrationCode ModernizationCode OrganizationCode QualityCode RefactoringComponent DevelopmentComponent RefactoringData Visualization
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