instructure/canvas-lms
Aug 2025 – Oct 2025
3 Months active
Languages Used
JavaScriptRubyTypeScriptGraphQLSQL
Technical Skills
Backend DevelopmentFront End DevelopmentReactTestingUI DevelopmentAPI Development
Chrystal Langston
PROFILE
Chrystal Langston
Chrystal Langston contributed to the instructure/canvas-lms repository by building and refining features that enhance assignment workflows and data integrity. She implemented a CSV upload workflow for differentiation tags, integrating React-based UI changes with Ruby on Rails backend logic and comprehensive RSpec tests. Addressing data consistency, she delivered a migration and Ruby script to automatically create missing sub-assignment submissions, ensuring reliable downstream processing. Chrystal also enforced peer review prerequisites through a new assignment-level flag, updating both GraphQL and REST APIs as well as UI controls. Her work demonstrated depth in backend development, database migration, and robust error handling across multiple layers.
Overall Statistics
Feature vs Bugs
40%Features
Repository Contributions
8Total
Bugs
3
Commits
8
Features
2
Lines of code
1,649
Activity Months3
Your Network
352 peopleSame Organization
@instructure.com184
Ahmed NaguibMember
Ádám MátéMember
Adam_MikulasMember
Adam MolnarMember
Nagy AdamMember
Adam SzaboMember
Adrian GruberMember
akemenyMember
Akos HermannMember
Shared Repositories
168
Ádám MátéMember
Adam_MikulasMember
Adam MolnarMember
Adam SzaboMember
Adrian GruberMember
akemenyMember
Akos HorvathMember
Alexandre DosSantosMember
alvaro.talaveraMember
Work History
October 2025
4 Commits • 1 Features
Oct 1, 2025concise monthly summary for 2025-10 focusing on key features delivered, major bug fixes, and business value. Highlights include data integrity automation for sub-assignment submissions and policy-driven enforcement of peer review prerequisites in Canvas LMS, with API/UI integration and migration-driven changes.
4 Commits • 1 Features
Oct 1, 2025concise monthly summary for 2025-10 focusing on key features delivered, major bug fixes, and business value. Highlights include data integrity automation for sub-assignment submissions and policy-driven enforcement of peer review prerequisites in Canvas LMS, with API/UI integration and migration-driven changes.
October 2025
September 2025
2 Commits
Sep 1, 2025September 2025 performance summary for instructure/canvas-lms: Implemented robust handling of SubAssignment Submissions to eliminate 500 errors when submissions are deleted or non-existent. Introduced a dedicated non-existent submission error path, refactored duplicated logic into a shared serializer, and clarified the has_sub_assignment_submissions flag to ensure downstream correctness. Added unit tests for Discussion Checkpoints management to protect against regressions. These changes were delivered via commits 451ed09376dc5131932408dc0c29d30580c87822 and 04fd0f81cb662921901ed7a216aaddf30fbec875. Impacts include reduced runtime errors, improved data integrity, and stronger test coverage. Technologies demonstrated: Python, Django REST framework, serializers, unit testing.
September 2025
2 Commits
Sep 1, 2025September 2025 performance summary for instructure/canvas-lms: Implemented robust handling of SubAssignment Submissions to eliminate 500 errors when submissions are deleted or non-existent. Introduced a dedicated non-existent submission error path, refactored duplicated logic into a shared serializer, and clarified the has_sub_assignment_submissions flag to ensure downstream correctness. Added unit tests for Discussion Checkpoints management to protect against regressions. These changes were delivered via commits 451ed09376dc5131932408dc0c29d30580c87822 and 04fd0f81cb662921901ed7a216aaddf30fbec875. Impacts include reduced runtime errors, improved data integrity, and stronger test coverage. Technologies demonstrated: Python, Django REST framework, serializers, unit testing.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for the canvas-lms development team (repository: instructure/canvas-lms). Focused on delivering a streamlined differentiation tagging workflow and reinforcing correctness around assignment unlock timing. The work emphasizes business value through improved automation, reliability, and maintainability.
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for the canvas-lms development team (repository: instructure/canvas-lms). Focused on delivering a streamlined differentiation tagging workflow and reinforcing correctness around assignment unlock timing. The work emphasizes business value through improved automation, reliability, and maintainability.
August 2025
Activity
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Quality Metrics
Correctness97.6%
Maintainability90.0%
Architecture87.6%
Performance86.2%
AI Usage22.6%
Skills & Technologies
Programming Languages
GraphQLJavaScriptRubySQLTypeScript
Technical Skills
API DevelopmentBackend DevelopmentData IntegrityDatabase ManagementDatabase MigrationError HandlingFeature FlaggingFeature ImplementationFront End DevelopmentFrontend DevelopmentFull Stack DevelopmentGraphQLREST APIReactRefactoring
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline