Khan/perseus
Oct 2024 – Jan 2026
15 Months active
Languages Used
JavaScriptTypeScriptMarkdownReacttsxLessCSSHTML
Technical Skills
Code CleanupCode OrganizationCode QualityCode RefactoringComponent StylingESLint Configuration
Matthew
PROFILE
Matthew
Matthew Curtis contributed to the Khan/perseus repository by architecting and delivering robust, maintainable UI components and infrastructure over a 15-month period. He unified user input management across widgets, centralized scoring logic for server-side readiness, and modernized React components to align with evolving frontend standards. Leveraging TypeScript, JavaScript, and React, Matthew refactored APIs, improved type safety, and enhanced test coverage, while also streamlining CI/CD workflows and dependency management. His work addressed complex state management, enabled answerless widget modes, and improved localization and error handling. These efforts resulted in a cleaner codebase, improved reliability, and accelerated feature delivery for the project.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
156Total
Bugs
22
Commits
156
Features
45
Lines of code
61,141
Activity Months15
Your Network
51 people
Work History
January 2026
14 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) highlights: Delivered Perseus UI enhancements with improved hint handling and rendering, plus extensive codebase maintenance and tooling upgrades to boost reliability and developer productivity. These changes support consistent hint availability display, cleaner rendering behavior, and a more maintainable codebase with better CI coverage.
14 Commits • 2 Features
Jan 1, 2026January 2026 (2026-01) highlights: Delivered Perseus UI enhancements with improved hint handling and rendering, plus extensive codebase maintenance and tooling upgrades to boost reliability and developer productivity. These changes support consistent hint availability display, cleaner rendering behavior, and a more maintainable codebase with better CI coverage.
January 2026
December 2025
6 Commits • 3 Features
Dec 1, 2025December 2025 monthly summary for Khan/perseus: Key features delivered include Perseus Widgets UX Enhancements with client-side input validation, improved empty-response error messaging for math exercises, safety hardening for image widget rendering, and a placeholder exposure for hint availability. Also delivered Go Parser Schema Change Guidance with clearer upgrade instructions and refreshed dependencies to latest stable versions, improving stability and developer workflow.
December 2025
6 Commits • 3 Features
Dec 1, 2025December 2025 monthly summary for Khan/perseus: Key features delivered include Perseus Widgets UX Enhancements with client-side input validation, improved empty-response error messaging for math exercises, safety hardening for image widget rendering, and a placeholder exposure for hint availability. Also delivered Go Parser Schema Change Guidance with clearer upgrade instructions and refreshed dependencies to latest stable versions, improving stability and developer workflow.
October 2025
2 Commits • 1 Features
Oct 1, 2025Month: 2025-10 – Khan/perseus: Focused on codebase hygiene, stability, and automated release reliability. Key features delivered and bugs fixed: Key features delivered: - Codebase Cleanup and Maintenance: Removed unused files, code, and exports to simplify the repository and improve maintainability. Commit: Run Knip (#2990). Major bugs fixed: - CI/CD Workflow Permissions Fix: Restored write permissions for the GitHub release action to enable PR creation and fix PR landing failures caused by insufficient permissions. Commit: Restore write permission for release action (#2997). Overall impact and accomplishments: - Improved repository maintainability and onboarding with a cleaner codebase. - Increased release automation reliability, reducing risk of PR landing failures and deployment delays. - Enabled faster code integration and clearer project structure, supporting feature delivery with less technical debt. Technologies/skills demonstrated: - Code cleanup tooling (Knip), Git hygiene, CI/CD workflow debugging, and release automation.
2 Commits • 1 Features
Oct 1, 2025Month: 2025-10 – Khan/perseus: Focused on codebase hygiene, stability, and automated release reliability. Key features delivered and bugs fixed: Key features delivered: - Codebase Cleanup and Maintenance: Removed unused files, code, and exports to simplify the repository and improve maintainability. Commit: Run Knip (#2990). Major bugs fixed: - CI/CD Workflow Permissions Fix: Restored write permissions for the GitHub release action to enable PR creation and fix PR landing failures caused by insufficient permissions. Commit: Restore write permission for release action (#2997). Overall impact and accomplishments: - Improved repository maintainability and onboarding with a cleaner codebase. - Increased release automation reliability, reducing risk of PR landing failures and deployment delays. - Enabled faster code integration and clearer project structure, supporting feature delivery with less technical debt. Technologies/skills demonstrated: - Code cleanup tooling (Knip), Git hygiene, CI/CD workflow debugging, and release automation.
October 2025
September 2025
10 Commits • 1 Features
Sep 1, 2025Month: 2025-09 — Focused on stability, API simplification, and a critical bug fix in the Number-line widget. Key features delivered: Perseus internal stability and API simplification with consolidated widget prop interfaces, removal of deprecated APIs, dependency alignment, and streamlined data flow to improve maintainability. Major bugs fixed: Number-line widget division editing triggered render errors; addressed onChange handling to prevent rendering failures. Overall impact: Reduced API surface and complexity, improved stability and maintainability, better CI reliability through dependency alignment and config tweaks, and enhanced testing coverage for edge-case widget behavior. Technologies/skills demonstrated: React widget architecture, API refactoring, dependency management, test automation, and build/configuration discipline (Knip, typestests, Frontend sync).
September 2025
10 Commits • 1 Features
Sep 1, 2025Month: 2025-09 — Focused on stability, API simplification, and a critical bug fix in the Number-line widget. Key features delivered: Perseus internal stability and API simplification with consolidated widget prop interfaces, removal of deprecated APIs, dependency alignment, and streamlined data flow to improve maintainability. Major bugs fixed: Number-line widget division editing triggered render errors; addressed onChange handling to prevent rendering failures. Overall impact: Reduced API surface and complexity, improved stability and maintainability, better CI reliability through dependency alignment and config tweaks, and enhanced testing coverage for edge-case widget behavior. Technologies/skills demonstrated: React widget architecture, API refactoring, dependency management, test automation, and build/configuration discipline (Knip, typestests, Frontend sync).
August 2025
17 Commits • 4 Features
Aug 1, 2025Monthly summary for Khan/perseus - August 2025. Key features delivered: - Refactor: Removed transform utilities across multiple widgets to simplify option handling, centralize user input state, and pass through options directly. - Feature: Integrate UserInputManager into Storybook preview and PerseusEditor, exporting deriveUserInputFromSerializedState to support restored input flows. - Chore: Documentation and dependency maintenance: updated README text, triggered version bumps, synchronized dependencies to latest compatible versions. Major bugs fixed: - Bug: Fix getPromptJSON to safely handle null or undefined userInput in the radio widget (nullish coalescing) with a test to prevent progression blocks. - Bug: Categorizer widget input parsing handles null/undefined values; ensured backend accepts null after JSON stringify. - Bug: Test data and widget version alignment for Perseus items: fix malformed PerseusItems in test data, bump radio widget version and add expression widget version to ensure correct data handling and migrations. Overall impact and accomplishments: - Reduced widget complexity by removing transform utilities, decreasing maintenance burden and rollout risk. - Improved input reliability and UX by robustly handling missing inputs and restored serialized state. - Enabled better testing, migrations, and Storybook preview fidelity. Technologies/skills demonstrated: - JavaScript/TypeScript refactoring, centralized state management, nullish handling, test enhancements, Storybook integration, module exports for restored state.
17 Commits • 4 Features
Aug 1, 2025Monthly summary for Khan/perseus - August 2025. Key features delivered: - Refactor: Removed transform utilities across multiple widgets to simplify option handling, centralize user input state, and pass through options directly. - Feature: Integrate UserInputManager into Storybook preview and PerseusEditor, exporting deriveUserInputFromSerializedState to support restored input flows. - Chore: Documentation and dependency maintenance: updated README text, triggered version bumps, synchronized dependencies to latest compatible versions. Major bugs fixed: - Bug: Fix getPromptJSON to safely handle null or undefined userInput in the radio widget (nullish coalescing) with a test to prevent progression blocks. - Bug: Categorizer widget input parsing handles null/undefined values; ensured backend accepts null after JSON stringify. - Bug: Test data and widget version alignment for Perseus items: fix malformed PerseusItems in test data, bump radio widget version and add expression widget version to ensure correct data handling and migrations. Overall impact and accomplishments: - Reduced widget complexity by removing transform utilities, decreasing maintenance burden and rollout risk. - Improved input reliability and UX by robustly handling missing inputs and restored serialized state. - Enabled better testing, migrations, and Storybook preview fidelity. Technologies/skills demonstrated: - JavaScript/TypeScript refactoring, centralized state management, nullish handling, test enhancements, Storybook integration, module exports for restored state.
August 2025
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 — Khan/perseus monthly summary Key features delivered: - Unified User Input Management in Renderer: Introduced a central UserInputManager and refactored the Renderer to consume and manage user input; Radio widget API/data flow aligned with the new model. (Commits: def76890e07460cdc00ac089fa3e5d267b2437d2; 3aa2b8e850113be50d7da99b5ded55979b2de006) - Grapher Widget Static Mode: Added static (read-only) mode with tests and a story to support read-only dashboards. (Commit: ee7e8463db10ad141a4282b7f7ea98a8246f6550) - Version Bump Script Documentation Path Update: Updated documentation to reflect the new path for PR version bumps. (Commit: 9ca48d6522ecccffb7124fe3da6312b0a8a7219d) Major bugs fixed: - Radio Widget Editor Crash Fix on Option Removal: Fix crash by ensuring UI state resets when stored choices change to prevent desynchronization. (Commit: d0ae6d16226ce6d39e3e47a1bf4fa91a8b3020d1) - Hints Initialization Bug in GradedGroups: Ensure hints in GradedGroups are initialized as PerseusRenderers with required properties (content, images, widgets) to avoid errors. (Commit: 16f0eefe0d07429528491a671984b47ef7f32715) - PythonProgram getDOMNodeForPath Removal: Remove the no-op getDOMNodeForPath method to simplify PythonProgram and resolve typing concerns. (Commit: f3b0fc30410b076adf4f81c02986347e21fc8b37) - OrdererPublicWidgetOptions Type Import Fix: Export and import OrdererPublicWidgetOptions type correctly from perseus-core to improve type correctness in the Orderer widget. (Commit: 4e12526af77890835f11235385e96e582a985e05) Overall impact and accomplishments: - The month delivered meaningful UX and stability improvements while reducing technical debt. Centralized input handling reduces future input-related bugs and streamlines feature work; static mode enables safer rendering scenarios; and code hygiene fixes (typing, removal of no-op methods, and clearer docs) improve long-term maintainability and onboarding. Tests and storytelling updates further strengthen QA coverage and stakeholder visibility. Technologies/skills demonstrated: - TypeScript and React-based UI patterns, component API design and refactoring, Python typing and code cleanup, test coverage, and documentation/versioning practices.
July 2025
8 Commits • 3 Features
Jul 1, 2025July 2025 — Khan/perseus monthly summary Key features delivered: - Unified User Input Management in Renderer: Introduced a central UserInputManager and refactored the Renderer to consume and manage user input; Radio widget API/data flow aligned with the new model. (Commits: def76890e07460cdc00ac089fa3e5d267b2437d2; 3aa2b8e850113be50d7da99b5ded55979b2de006) - Grapher Widget Static Mode: Added static (read-only) mode with tests and a story to support read-only dashboards. (Commit: ee7e8463db10ad141a4282b7f7ea98a8246f6550) - Version Bump Script Documentation Path Update: Updated documentation to reflect the new path for PR version bumps. (Commit: 9ca48d6522ecccffb7124fe3da6312b0a8a7219d) Major bugs fixed: - Radio Widget Editor Crash Fix on Option Removal: Fix crash by ensuring UI state resets when stored choices change to prevent desynchronization. (Commit: d0ae6d16226ce6d39e3e47a1bf4fa91a8b3020d1) - Hints Initialization Bug in GradedGroups: Ensure hints in GradedGroups are initialized as PerseusRenderers with required properties (content, images, widgets) to avoid errors. (Commit: 16f0eefe0d07429528491a671984b47ef7f32715) - PythonProgram getDOMNodeForPath Removal: Remove the no-op getDOMNodeForPath method to simplify PythonProgram and resolve typing concerns. (Commit: f3b0fc30410b076adf4f81c02986347e21fc8b37) - OrdererPublicWidgetOptions Type Import Fix: Export and import OrdererPublicWidgetOptions type correctly from perseus-core to improve type correctness in the Orderer widget. (Commit: 4e12526af77890835f11235385e96e582a985e05) Overall impact and accomplishments: - The month delivered meaningful UX and stability improvements while reducing technical debt. Centralized input handling reduces future input-related bugs and streamlines feature work; static mode enables safer rendering scenarios; and code hygiene fixes (typing, removal of no-op methods, and clearer docs) improve long-term maintainability and onboarding. Tests and storytelling updates further strengthen QA coverage and stakeholder visibility. Technologies/skills demonstrated: - TypeScript and React-based UI patterns, component API design and refactoring, Python typing and code cleanup, test coverage, and documentation/versioning practices.
June 2025
37 Commits • 7 Features
Jun 1, 2025June 2025: Khan/perseus delivered across-the-board stability, type-safety, and UI consistency improvements that directly impact business value and developer productivity. Key work spanned cross-component renderer input state unification, typing enhancements, dependency hygiene, and targeted bug fixes across the Perseus UI stack (Editor, IG, Plotter, and static widgets).
37 Commits • 7 Features
Jun 1, 2025June 2025: Khan/perseus delivered across-the-board stability, type-safety, and UI consistency improvements that directly impact business value and developer productivity. Key work spanned cross-component renderer input state unification, typing enhancements, dependency hygiene, and targeted bug fixes across the Perseus UI stack (Editor, IG, Plotter, and static widgets).
June 2025
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 performance summary for Khan/perseus: Delivered cross-widget answerless mode across InputNumber, Grapher, and Group. Strengthened user experience by enabling widgets to operate without predefined answers; added tests and stories for both answerful and answerless scenarios; ensured commits are well-documented and traceable. No major bug fixes this month; effort focused on feature expansion and quality through test coverage.
May 2025
3 Commits • 1 Features
May 1, 2025May 2025 performance summary for Khan/perseus: Delivered cross-widget answerless mode across InputNumber, Grapher, and Group. Strengthened user experience by enabling widgets to operate without predefined answers; added tests and stories for both answerful and answerless scenarios; ensured commits are well-documented and traceable. No major bug fixes this month; effort focused on feature expansion and quality through test coverage.
April 2025
8 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for Khan/perseus focusing on delivering robust UI components, correctness improvements, and code quality enhancements. The month emphasized data rendering flexibility, accurate answer processing, input validation, and maintainability, aligning with business goals of reliability, scalability, and faster iteration.
8 Commits • 3 Features
Apr 1, 2025April 2025 monthly summary for Khan/perseus focusing on delivering robust UI components, correctness improvements, and code quality enhancements. The month emphasized data rendering flexibility, accurate answer processing, input validation, and maintainability, aligning with business goals of reliability, scalability, and faster iteration.
April 2025
March 2025
6 Commits • 5 Features
Mar 1, 2025March 2025 monthly summary for Khan/perseus. Focused on privacy-first widget improvements, frontend modernization, and developer experience enhancements. No critical bugs fixed this month; primary value delivered through feature work and maintainability improvements.
March 2025
6 Commits • 5 Features
Mar 1, 2025March 2025 monthly summary for Khan/perseus. Focused on privacy-first widget improvements, frontend modernization, and developer experience enhancements. No critical bugs fixed this month; primary value delivered through feature work and maintainability improvements.
February 2025
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for Khan/perseus focused on architectural enhancements, reliability, and testing coverage. Delivered centralization of Perseus scoring and item processing by moving core scoring/validation to a dedicated perseus-score package, paving the way for server-side scoring without React dependencies and improving maintainability. Implemented answerless rendering paths for Perseus widgets with cross-scenario tests, expanding widget usability in data-sparse contexts. Fixed a numeric argument handling bug in the KAS expression evaluator by removing a problematic optimization and adding tests. Extended Expression scoring with TeX input support and new tests to ensure correct TeX-based scoring. These changes collectively improve system reliability, scalability, and developer productivity while strengthening business value through cleaner architecture and broader widget capabilities.
6 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for Khan/perseus focused on architectural enhancements, reliability, and testing coverage. Delivered centralization of Perseus scoring and item processing by moving core scoring/validation to a dedicated perseus-score package, paving the way for server-side scoring without React dependencies and improving maintainability. Implemented answerless rendering paths for Perseus widgets with cross-scenario tests, expanding widget usability in data-sparse contexts. Fixed a numeric argument handling bug in the KAS expression evaluator by removing a problematic optimization and adding tests. Extended Expression scoring with TeX input support and new tests to ensure correct TeX-based scoring. These changes collectively improve system reliability, scalability, and developer productivity while strengthening business value through cleaner architecture and broader widget capabilities.
February 2025
January 2025
18 Commits • 2 Features
Jan 1, 2025January 2025: Delivered server-ready scoring capabilities and a consolidated core for Perseus, along with localization improvements to error messaging. These changes enhance scalability, maintainability, and user experience, enabling earlier server-side scoring, consistent widget upgrades, and translation-ready UX across the product.
January 2025
18 Commits • 2 Features
Jan 1, 2025January 2025: Delivered server-ready scoring capabilities and a consolidated core for Perseus, along with localization improvements to error messaging. These changes enhance scalability, maintainability, and user experience, enabling earlier server-side scoring, consistent widget upgrades, and translation-ready UX across the product.
December 2024
6 Commits • 2 Features
Dec 1, 2024December 2024: Khan/perseus focused on architectural improvements and maintenance to enable faster, safer feature delivery. Implemented externalized Perseus scoring logic via scorePerseusItem and refactored related scoring/empty widget checks to align with the new mechanism, laying groundwork for removing legacy scoring paths and simplifying testing usage. Completed a codebase modernization pass including removal of deprecated findDOMNode usage and elimination of unused MultiRenderer (GTP), along with CI trigger and package updates to keep dependencies current. These changes reduce technical debt, improve testability, and streamline future changes, enabling more reliable, scalable feature delivery.
6 Commits • 2 Features
Dec 1, 2024December 2024: Khan/perseus focused on architectural improvements and maintenance to enable faster, safer feature delivery. Implemented externalized Perseus scoring logic via scorePerseusItem and refactored related scoring/empty widget checks to align with the new mechanism, laying groundwork for removing legacy scoring paths and simplifying testing usage. Completed a codebase modernization pass including removal of deprecated findDOMNode usage and elimination of unused MultiRenderer (GTP), along with CI trigger and package updates to keep dependencies current. These changes reduce technical debt, improve testability, and streamline future changes, enabling more reliable, scalable feature delivery.
December 2024
November 2024
9 Commits • 6 Features
Nov 1, 2024November 2024 monthly summary for Khan/perseus. Focused on delivering business-value features, stabilizing UI behavior, and modernizing code with an emphasis on maintainability and future readiness. Highlights include dependency upgrades enabling cross-project integration, race-condition fixes, pure-function refactors, and modernized React components.
November 2024
9 Commits • 6 Features
Nov 1, 2024November 2024 monthly summary for Khan/perseus. Focused on delivering business-value features, stabilizing UI behavior, and modernizing code with an emphasis on maintainability and future readiness. Highlights include dependency upgrades enabling cross-project integration, race-condition fixes, pure-function refactors, and modernized React components.
October 2024
6 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for Khan/perseus focusing on strengthening type safety, dependency hygiene, and API boundaries across the Perseus ecosystem, complemented by focused codebase cleanup to improve maintainability and reduce surface area.
6 Commits • 2 Features
Oct 1, 2024October 2024 monthly summary for Khan/perseus focusing on strengthening type safety, dependency hygiene, and API boundaries across the Perseus ecosystem, complemented by focused codebase cleanup to improve maintainability and reduce surface area.
October 2024
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Quality Metrics
Correctness92.0%
Maintainability88.8%
Architecture88.6%
Performance84.8%
AI Usage21.2%
Skills & Technologies
Programming Languages
CSSHTMLJSONJavaScriptLessMarkdownReactTypeScriptYAMLcss
Technical Skills
API DesignAPI IntegrationBug FixingCI/CDCode CleanupCode ExportingCode LintingCode MaintenanceCode OrganizationCode QualityCode ReadabilityCode RefactoringComponent ArchitectureComponent DesignComponent Development
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline