sakaiproject/sakai
Nov 2024 – Mar 2026
11 Months active
Languages Used
JavaHTMLJavaScriptPropertiesVMVelocityMarkdownXML
Technical Skills
Backend DevelopmentJava DevelopmentLTI IntegrationAPI DesignAPI DevelopmentAPI Integration
Charles Severance
PROFILE
Charles Severance
Chris Sevilleja contributed to the sakaiproject/sakai repository by engineering robust integrations and content management features for learning platforms. Over 11 months, Chris delivered enhancements to LTI workflows, content import/export reliability, and gradebook synchronization, focusing on data integrity and maintainability. Using Java and JavaScript, Chris modernized LTI data models, centralized utility logic, and refactored legacy XML handling, improving type safety and reducing technical debt. The work included backend and frontend development, with careful attention to error handling, user messaging, and admin workflows. Chris’s contributions addressed real-world interoperability challenges, resulting in more reliable, maintainable, and user-friendly educational technology infrastructure.
Overall Statistics
Feature vs Bugs
55%Features
Repository Contributions
92Total
Bugs
21
Commits
92
Features
26
Lines of code
37,558
Activity Months11
Your Network
218 peopleSame Organization
@umich.edu197
Avionics CompMember
Almo-oMember
Alexander SmartMember
Abby DukeMember
Adam DiehlMember
adfarthMember
Alex HansenMember
Aniket JivaniMember
Axel KerbecMember
Work History
March 2026
3 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) focused on stabilizing external content integration and safer admin defaults in sakaiproject/sakai. Delivered dynamic LTI iframe appearance and resizing to improve how external content is displayed and sized, including HTML structure adjustments and JavaScript-based sizing; commits c9941b74f248837c1a8ea6c851cf92f77c1be2ba and 09d3d234fb59a2e2770aea74d16456967e86b6fb. Also fixed edge-case resizing for Lessons iframes when the lti.frameResize message is received. Changed default of citationsAdmin.autocreate to false to prevent unintended site creation unless explicitly configured (commit ca17c27bdf3a6314bbe27c687e1d75dabb2a55a7). These changes improve external content integration reliability and governance.
3 Commits • 1 Features
Mar 1, 2026March 2026 (2026-03) focused on stabilizing external content integration and safer admin defaults in sakaiproject/sakai. Delivered dynamic LTI iframe appearance and resizing to improve how external content is displayed and sized, including HTML structure adjustments and JavaScript-based sizing; commits c9941b74f248837c1a8ea6c851cf92f77c1be2ba and 09d3d234fb59a2e2770aea74d16456967e86b6fb. Also fixed edge-case resizing for Lessons iframes when the lti.frameResize message is received. Changed default of citationsAdmin.autocreate to false to prevent unintended site creation unless explicitly configured (commit ca17c27bdf3a6314bbe27c687e1d75dabb2a55a7). These changes improve external content integration reliability and governance.
March 2026
February 2026
8 Commits • 3 Features
Feb 1, 2026February 2026 focused on delivering robust LTI iframe integration improvements, locality-aware UI behavior, and essential maintenance to reduce technical debt, while preserving user workflows. Key work spanned four items in sakaiproject/sakai: - LTI iframe rendering and XML handling improvements: removed the XMLMap library, introduced MessageResponseBuilder and POXJacksonParser for XML handling, centralized iframe allowances via a browser feature string, enabled local network access, and implemented dynamic iframe height with a rollback path for lesson-builder changes. Related commits include SAK-51434, SAK-52276, and SAK-52099. - Revert LTI iframe changes in the lesson builder: rolled back prior iframe changes to restore embedding functionality, preserving existing lesson authoring workflows. (SAK-52374) - Dark Mode iframe styling improvements (locality aware): added locality-aware styling to prevent Dark Mode from flowing into non-local iframes and introduced tests for locality logic. (SAK-52376) - LTI tooling maintenance: dependency and API cleanup, including fixing a missing lti-util dependency and removing the deprecated Basic Outcomes API, with improved error handling and a pom.xml fix. (SAK-51434, SAK-52345) Overall, this work improves cross-browser/LTI reliability, enhances security and accessibility for embedded tools, strengthens maintainability, and reduces downstream support risk by cleaning up dependencies and APIs.
February 2026
8 Commits • 3 Features
Feb 1, 2026February 2026 focused on delivering robust LTI iframe integration improvements, locality-aware UI behavior, and essential maintenance to reduce technical debt, while preserving user workflows. Key work spanned four items in sakaiproject/sakai: - LTI iframe rendering and XML handling improvements: removed the XMLMap library, introduced MessageResponseBuilder and POXJacksonParser for XML handling, centralized iframe allowances via a browser feature string, enabled local network access, and implemented dynamic iframe height with a rollback path for lesson-builder changes. Related commits include SAK-51434, SAK-52276, and SAK-52099. - Revert LTI iframe changes in the lesson builder: rolled back prior iframe changes to restore embedding functionality, preserving existing lesson authoring workflows. (SAK-52374) - Dark Mode iframe styling improvements (locality aware): added locality-aware styling to prevent Dark Mode from flowing into non-local iframes and introduced tests for locality logic. (SAK-52376) - LTI tooling maintenance: dependency and API cleanup, including fixing a missing lti-util dependency and removing the deprecated Basic Outcomes API, with improved error handling and a pom.xml fix. (SAK-51434, SAK-52345) Overall, this work improves cross-browser/LTI reliability, enhances security and accessibility for embedded tools, strengthens maintainability, and reduces downstream support risk by cleaning up dependencies and APIs.
October 2025
8 Commits • 5 Features
Oct 1, 2025October 2025 (2025-10) – Sakai repository delivered a major LTI modernization and cleanup, focusing on type safety, maintainability, and reduced configuration debt. Key features include LTI data model modernization using POJOs/Beans to replace Map-based handling; removal of deprecated LTI external tool configurations to simplify setup; and content storage modernization removing legacy XML ORM/pipeline. Notable reliability improvements include enhanced LTI error handling and user feedback, reducing silent failures. Security and governance improvements were achieved with stealthed LTI tool links at site level, plus improved logging for admin-enabled tooling. Overall, these changes reduce maintenance burden, enable faster feature evolution, and improve end-user and administrator experience.
8 Commits • 5 Features
Oct 1, 2025October 2025 (2025-10) – Sakai repository delivered a major LTI modernization and cleanup, focusing on type safety, maintainability, and reduced configuration debt. Key features include LTI data model modernization using POJOs/Beans to replace Map-based handling; removal of deprecated LTI external tool configurations to simplify setup; and content storage modernization removing legacy XML ORM/pipeline. Notable reliability improvements include enhanced LTI error handling and user feedback, reducing silent failures. Security and governance improvements were achieved with stealthed LTI tool links at site level, plus improved logging for admin-enabled tooling. Overall, these changes reduce maintenance burden, enable faster feature evolution, and improve end-user and administrator experience.
October 2025
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for sakaiproject/sakai: Delivered two key features with targeted improvements to reliability and maintainability, aligning with business objectives and reducing risk in production.
September 2025
2 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for sakaiproject/sakai: Delivered two key features with targeted improvements to reliability and maintainability, aligning with business objectives and reducing risk in production.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for sakaiproject/sakai focusing on LTI reliability, content management improvements, and grade synchronization. Key feature delivered: LTI Utilities Refactor and Tests, centralizing numeric conversions in LTIUtil and updating unit tests for consistency and maintainability. Major bugs fixed: duplicate lesson creation during content merges (Site Copy Lessons), misleading messaging when an external LTI tool is deleted, and preserving resourceLinkId during UpdateLineItem interactions to ensure accurate grade sync. All changes contributed to sakai repository with traceable commits. Impact: Improved maintainability and consistency of LTI utilities, enhanced content integrity during site copy, clearer user feedback in assignments, and more reliable grade synchronization with the gradebook. These improvements reduce support overhead and increase platform reliability for instructors and students. Technologies/skills demonstrated: Java LTI integration patterns, unit test modernization, API robustness, error handling and user messaging, and Git-based change traceability.
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for sakaiproject/sakai focusing on LTI reliability, content management improvements, and grade synchronization. Key feature delivered: LTI Utilities Refactor and Tests, centralizing numeric conversions in LTIUtil and updating unit tests for consistency and maintainability. Major bugs fixed: duplicate lesson creation during content merges (Site Copy Lessons), misleading messaging when an external LTI tool is deleted, and preserving resourceLinkId during UpdateLineItem interactions to ensure accurate grade sync. All changes contributed to sakai repository with traceable commits. Impact: Improved maintainability and consistency of LTI utilities, enhanced content integrity during site copy, clearer user feedback in assignments, and more reliable grade synchronization with the gradebook. These improvements reduce support overhead and increase platform reliability for instructors and students. Technologies/skills demonstrated: Java LTI integration patterns, unit test modernization, API robustness, error handling and user messaging, and Git-based change traceability.
May 2025
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for sakaiproject/sakai focused on stabilizing core tooling, strengthening data migration, and clarifying export behavior. Key work spanned LTI integration hygiene, lesson import reliability during data merges, and refactoring for maintainable exports, with clear business value in reliability, data integrity, and admin experience.
April 2025
3 Commits • 1 Features
Apr 1, 2025April 2025 monthly summary for sakaiproject/sakai focused on stabilizing core tooling, strengthening data migration, and clarifying export behavior. Key work spanned LTI integration hygiene, lesson import reliability during data merges, and refactoring for maintainable exports, with clear business value in reliability, data integrity, and admin experience.
March 2025
12 Commits • 6 Features
Mar 1, 2025March 2025 (2025-03): Delivered targeted improvements to content import reliability, LTI/Gradebook integration, assessment imports, and calendar/announcements integrity, alongside logging/import efficiency and attachment handling. The work reduces first-pass import failures, prevents stale links, improves grading data accuracy, and lowers operational overhead, delivering tangible business value for course administrators and instructors.
12 Commits • 6 Features
Mar 1, 2025March 2025 (2025-03): Delivered targeted improvements to content import reliability, LTI/Gradebook integration, assessment imports, and calendar/announcements integrity, alongside logging/import efficiency and attachment handling. The work reduces first-pass import failures, prevents stale links, improves grading data accuracy, and lowers operational overhead, delivering tangible business value for course administrators and instructors.
March 2025
February 2025
23 Commits • 3 Features
Feb 1, 2025February 2025: Delivered major LTI and content reliability improvements for sakai, along with extensive CC+ import/export stability and data-preservation enhancements. The work strengthens cross-site interoperability, preserves user data during migrations, and reduces import/export errors, delivering tangible business value for course content management and LMS integrations.
February 2025
23 Commits • 3 Features
Feb 1, 2025February 2025: Delivered major LTI and content reliability improvements for sakai, along with extensive CC+ import/export stability and data-preservation enhancements. The work strengthens cross-site interoperability, preserves user data during migrations, and reduces import/export errors, delivering tangible business value for course content management and LMS integrations.
January 2025
11 Commits • 1 Features
Jan 1, 2025January 2025 (2025-01) monthly summary for sakaiproject/sakai: Delivered LTI Integration and Import Enhancements improving archiving/merging during imports, accurate author attribution for imported assignments, UI/security refinements, and improved error messaging and launch behavior. Implemented cross-server import stability and enhanced tool/content creation during imports. Reverted a previous change that caused duplicate lesson links to ensure stable lesson creation flow. This work reduces import errors, improves content fidelity, and strengthens security and user experience for instructors and admins.
11 Commits • 1 Features
Jan 1, 2025January 2025 (2025-01) monthly summary for sakaiproject/sakai: Delivered LTI Integration and Import Enhancements improving archiving/merging during imports, accurate author attribution for imported assignments, UI/security refinements, and improved error messaging and launch behavior. Implemented cross-server import stability and enhanced tool/content creation during imports. Reverted a previous change that caused duplicate lesson links to ensure stable lesson creation flow. This work reduces import errors, improves content fidelity, and strengthens security and user experience for instructors and admins.
January 2025
December 2024
16 Commits • 3 Features
Dec 1, 2024In December 2024, delivered key improvements across LTI tool UX, archiving, and polls data handling. The work enhances cross-tool consistency, data integrity, and site portability, reducing admin effort and enabling smoother content migration.
December 2024
16 Commits • 3 Features
Dec 1, 2024In December 2024, delivered key improvements across LTI tool UX, archiving, and polls data handling. The work enhances cross-tool consistency, data integrity, and site portability, reducing admin effort and enabling smoother content migration.
November 2024
2 Commits
Nov 1, 2024November 2024 monthly summary for sakaiproject/sakai focusing on LTI integration reliability and data integrity. Delivered two critical bug fixes that directly improve end-user experience and system stability in FOORM/LTI workflows.
2 Commits
Nov 1, 2024November 2024 monthly summary for sakaiproject/sakai focusing on LTI integration reliability and data integrity. Delivered two critical bug fixes that directly improve end-user experience and system stability in FOORM/LTI workflows.
November 2024
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Quality Metrics
Correctness87.6%
Maintainability85.2%
Architecture82.2%
Performance77.0%
AI Usage22.0%
Skills & Technologies
Programming Languages
CSSHTMLJSONJavaJavaScriptMarkdownPropertiesSQLVMVelocity
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI developmentAssessment SystemsAssignmentsBackend DevelopmentBug FixBug FixingCalendar IntegrationCalendar ManagementCode CleanupCode OrganizationCode RefactoringCommon Cartridge Export/Import
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