mbta/screens
Nov 2024 – Oct 2025
12 Months active
Languages Used
ElixirJavaScriptSCSSTypeScriptYAMLJSONtsxCSS
Technical Skills
API DevelopmentAPI IntegrationAPI MaintenanceBackend DevelopmentCI/CDCode Cleanup
Cora Grant
PROFILE
Cora Grant
Over twelve months, Chris Grant developed and maintained the mbta/screens platform, delivering 64 features and resolving 27 bugs to improve reliability and user experience for transit displays. He architected modular Elixir and TypeScript codebases, refactored alert and departure data models, and enhanced UI/UX for Pre-Fare, elevator, and subway status widgets. Chris unified API integration and caching strategies, modernized frontend tooling with React 18 and Webpack 5, and streamlined CI/CD pipelines for faster, safer deployments. His work emphasized maintainability, robust data handling, and operational efficiency, resulting in a cleaner, more scalable codebase that supports rapid feature delivery and stable production.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
212Total
Bugs
27
Commits
212
Features
64
Lines of code
59,053
Activity Months12
Your Network
23 people
Work History
October 2025
12 Commits • 3 Features
Oct 1, 2025Concise monthly summary for 2025-10 covering work on mbta/screens. The month focused on delivering user-visible UI updates, stabilizing Pre-Fare workflows, and cleaning up the codebase to enable faster feature delivery and lower maintenance burden. Key improvements were made in widget data modeling, user experience for Pre-Fare screens, and robustness of departure data handling.
12 Commits • 3 Features
Oct 1, 2025Concise monthly summary for 2025-10 covering work on mbta/screens. The month focused on delivering user-visible UI updates, stabilizing Pre-Fare workflows, and cleaning up the codebase to enable faster feature delivery and lower maintenance burden. Key improvements were made in widget data modeling, user experience for Pre-Fare screens, and robustness of departure data handling.
October 2025
September 2025
22 Commits • 7 Features
Sep 1, 2025September 2025: Achieved reliability improvements and modernization across mbta/screens, focusing on data correctness, user-facing stability, and developer experience. Outcome-driven work includes consolidated Mercury API docs, a modernized React stack, and targeted UI/UX and tooling enhancements that reduce operational risk and accelerate delivery.
September 2025
22 Commits • 7 Features
Sep 1, 2025September 2025: Achieved reliability improvements and modernization across mbta/screens, focusing on data correctness, user-facing stability, and developer experience. Outcome-driven work includes consolidated Mercury API docs, a modernized React stack, and targeted UI/UX and tooling enhancements that reduce operational risk and accelerate delivery.
August 2025
30 Commits • 10 Features
Aug 1, 2025Monthly summary for 2025-08 (mbta/screens): Delivered robust enhancements to the Reconstructed Alerts system, improved reliability of Mercury device logging, and strengthened frontend/devops capabilities. Key features delivered include Reconstructed Alerts enhancements (refined generation logic, delays handling, single-tracking, and informational alerts) and Admin UI improvements, alongside important data hygiene work (elevator redundancy data maintenance and alignment of service day boundaries). Major bugs fixed across the DUP context improved pill rendering, headway messaging, and location context, plus tolerance improvements for no-data configurations. Overall, these changes increased alert accuracy and reliability of device endpoints, reduced operational noise, and improved developer productivity through tooling upgrades and streamlined deployment.
30 Commits • 10 Features
Aug 1, 2025Monthly summary for 2025-08 (mbta/screens): Delivered robust enhancements to the Reconstructed Alerts system, improved reliability of Mercury device logging, and strengthened frontend/devops capabilities. Key features delivered include Reconstructed Alerts enhancements (refined generation logic, delays handling, single-tracking, and informational alerts) and Admin UI improvements, alongside important data hygiene work (elevator redundancy data maintenance and alignment of service day boundaries). Major bugs fixed across the DUP context improved pill rendering, headway messaging, and location context, plus tolerance improvements for no-data configurations. Overall, these changes increased alert accuracy and reliability of device endpoints, reduced operational noise, and improved developer productivity through tooling upgrades and streamlined deployment.
August 2025
July 2025
21 Commits • 7 Features
Jul 1, 2025July 2025 — mbta/screens: Key deliveries across Subway Status, monitoring, UI, and API layers delivered measurable business value through reliability, performance, and consistency improvements. Highlights include a consolidated Subway Status messaging and alerts pipeline with single-tracking messaging and improved endpoint descriptions; enhanced device monitoring patterns, logging, and API surface; LCD screen UI standardization and integration of screen_checker; and targeted dependencies/API updates including memcached extraction. In parallel, DupAlert refactors and tests improved stability, and subway status tests were streamlined. A bug fix addressed time ranges for enabling audio to ensure correct audio readouts.
July 2025
21 Commits • 7 Features
Jul 1, 2025July 2025 — mbta/screens: Key deliveries across Subway Status, monitoring, UI, and API layers delivered measurable business value through reliability, performance, and consistency improvements. Highlights include a consolidated Subway Status messaging and alerts pipeline with single-tracking messaging and improved endpoint descriptions; enhanced device monitoring patterns, logging, and API surface; LCD screen UI standardization and integration of screen_checker; and targeted dependencies/API updates including memcached extraction. In parallel, DupAlert refactors and tests improved stability, and subway status tests were streamlined. A bug fix addressed time ranges for enabling audio to ensure correct audio readouts.
June 2025
14 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for mbta/screens: Delivered targeted feature work and stability improvements across the GlEink LineMap, departure data handling, admin UI, and tooling. Focused on increasing maintainability, reliability, and admin/operator efficiency, while modernizing the tech stack to stay aligned with supported versions.
14 Commits • 3 Features
Jun 1, 2025June 2025 monthly summary for mbta/screens: Delivered targeted feature work and stability improvements across the GlEink LineMap, departure data handling, admin UI, and tooling. Focused on increasing maintainability, reliability, and admin/operator efficiency, while modernizing the tech stack to stay aligned with supported versions.
June 2025
May 2025
17 Commits • 6 Features
May 1, 2025May 2025 monthly summary for repository mbta/screens focused on delivering key frontend features, stabilizing audio alerts, improving performance via caching, and simplifying the codebase. Highlights include admin UI/config workflow enhancements, image caching headers, multi-stop audio alerts, UI header/footer standardization, and refactoring Location Context/Route data fetch paths. Also removed deprecated ShuttleBusInfo widget and addressed critical stability fixes in the audio/alerts flow. This period emphasizes faster UI, reduced configuration noise, improved reliability, and maintainable code with measurable business value.
May 2025
17 Commits • 6 Features
May 1, 2025May 2025 monthly summary for repository mbta/screens focused on delivering key frontend features, stabilizing audio alerts, improving performance via caching, and simplifying the codebase. Highlights include admin UI/config workflow enhancements, image caching headers, multi-stop audio alerts, UI header/footer standardization, and refactoring Location Context/Route data fetch paths. Also removed deprecated ShuttleBusInfo widget and addressed critical stability fixes in the audio/alerts flow. This period emphasizes faster UI, reduced configuration noise, improved reliability, and maintainable code with measurable business value.
April 2025
18 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for mbta/screens focused on reliability improvements, feature delivery, and build stability. Key features were delivered, major bugs fixed, and business value enhanced through architecture changes and UI polish. The team also modernized tooling to speed up releases and reduce toil. Key features delivered: - Alert data model and parsing overhaul with atom-based activity types: consolidates alert facility data via a new Facility struct, centralizes V3 API parsing, and introduces robust string-to-atom mappings to improve alert reliability. - Elevator screen enhancements: uses facility stop data for closures, optimizes route pills, adds downstream context for closed elevators, and improves no-data handling, audio, and UI polish. - Departure API refactor and consolidation (V2): removes legacy v1 code and centralizes departure parsing. - CI/build and tooling improvements: enhances CI workflow, cache handling, ASDF reshims, and webpack adjustments to boost reliability and performance. Major bugs fixed: - Fixed missing alert activity and facility type atoms (prevents runtime atom lookup failures). - Stabilized elevator screen: crash in elevator logic fixed and improved no-data handling and cosmetic issues in closures. - Departure no-data fallbacks and related UI stability improvements. Overall impact and accomplishments: - Increased reliability and correctness of alert data across UI, enabling more accurate rider information. - Smoother elevator closure workflows and reduced maintenance burden by removing dead code and consolidating parsing logic. - Faster, more deterministic releases due to CI/cache and tooling improvements. Technologies/skills demonstrated: - Refactoring, API parsing architecture, and atom-based data modeling. - Data-driven UI improvements for no-data states, audio, and UX polish. - CI/CD optimization (caching, reshims, Webpack) and build tooling improvements. - De-duplication of legacy code and debt reduction for maintainability.
18 Commits • 4 Features
Apr 1, 2025April 2025 monthly summary for mbta/screens focused on reliability improvements, feature delivery, and build stability. Key features were delivered, major bugs fixed, and business value enhanced through architecture changes and UI polish. The team also modernized tooling to speed up releases and reduce toil. Key features delivered: - Alert data model and parsing overhaul with atom-based activity types: consolidates alert facility data via a new Facility struct, centralizes V3 API parsing, and introduces robust string-to-atom mappings to improve alert reliability. - Elevator screen enhancements: uses facility stop data for closures, optimizes route pills, adds downstream context for closed elevators, and improves no-data handling, audio, and UI polish. - Departure API refactor and consolidation (V2): removes legacy v1 code and centralizes departure parsing. - CI/build and tooling improvements: enhances CI workflow, cache handling, ASDF reshims, and webpack adjustments to boost reliability and performance. Major bugs fixed: - Fixed missing alert activity and facility type atoms (prevents runtime atom lookup failures). - Stabilized elevator screen: crash in elevator logic fixed and improved no-data handling and cosmetic issues in closures. - Departure no-data fallbacks and related UI stability improvements. Overall impact and accomplishments: - Increased reliability and correctness of alert data across UI, enabling more accurate rider information. - Smoother elevator closure workflows and reduced maintenance burden by removing dead code and consolidating parsing logic. - Faster, more deterministic releases due to CI/cache and tooling improvements. Technologies/skills demonstrated: - Refactoring, API parsing architecture, and atom-based data modeling. - Data-driven UI improvements for no-data states, audio, and UX polish. - CI/CD optimization (caching, reshims, Webpack) and build tooling improvements. - De-duplication of legacy code and debt reduction for maintainability.
April 2025
March 2025
29 Commits • 9 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for mbta/screens focusing on delivering business value through feature delivery, reliability improvements, and codebase modernization. Highlights include enabling Solo Pre-Fares with alert widget, improving admin debugging with inspector URL visibility, refactoring alert handling, stabilizing ReconstructedAlert logic with tests, and targeted Pre-Fare and CI/cleanup work that reduce production risk and lay groundwork for rapid iterations.
March 2025
29 Commits • 9 Features
Mar 1, 2025March 2025 (2025-03) monthly summary for mbta/screens focusing on delivering business value through feature delivery, reliability improvements, and codebase modernization. Highlights include enabling Solo Pre-Fares with alert widget, improving admin debugging with inspector URL visibility, refactoring alert handling, stabilizing ReconstructedAlert logic with tests, and targeted Pre-Fare and CI/cleanup work that reduce production risk and lay groundwork for rapid iterations.
February 2025
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for mbta/screens. This period focused on delivering rider-facing functionality, stabilizing outage messaging, and improving code quality to enable faster, safer future work.
5 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for mbta/screens. This period focused on delivering rider-facing functionality, stabilizing outage messaging, and improving code quality to enable faster, safer future work.
February 2025
January 2025
14 Commits • 5 Features
Jan 1, 2025January 2025 performance summary for mbta/screens. Focused on stability, UX improvements, and maintainability across Departures, Admin UI, Sectionals, and elevator closures, with substantial code cleanup and refactor-driven work.
January 2025
14 Commits • 5 Features
Jan 1, 2025January 2025 performance summary for mbta/screens. Focused on stability, UX improvements, and maintainability across Departures, Admin UI, Sectionals, and elevator closures, with substantial code cleanup and refactor-driven work.
December 2024
18 Commits • 3 Features
Dec 1, 2024December 2024 — mbta/screens: Delivered targeted reliability improvements for the Elevator System, introduced audio readout for Bus Shelters, and completed core infra/tooling upgrades to enable faster, safer deployments. The work reduced risk in outage data interpretation, improved admin configurability, and modernized the tech stack, contributing to higher system availability and better accessibility.
18 Commits • 3 Features
Dec 1, 2024December 2024 — mbta/screens: Delivered targeted reliability improvements for the Elevator System, introduced audio readout for Bus Shelters, and completed core infra/tooling upgrades to enable faster, safer deployments. The work reduced risk in outage data interpretation, improved admin configurability, and modernized the tech stack, contributing to higher system availability and better accessibility.
December 2024
November 2024
12 Commits • 5 Features
Nov 1, 2024November 2024 performance summary for mbta/screens focused on modularization, data flow improvements, and testability that reduce maintenance costs and accelerate feature delivery. Delivered architecture improvements, upgraded data retrieval, and CI/test infra refinements to support reliable deployments and downstream widgets.
November 2024
12 Commits • 5 Features
Nov 1, 2024November 2024 performance summary for mbta/screens focused on modularization, data flow improvements, and testability that reduce maintenance costs and accelerate feature delivery. Delivered architecture improvements, upgraded data retrieval, and CI/test infra refinements to support reliable deployments and downstream widgets.
Activity
Loading activity data...
Quality Metrics
Correctness90.2%
Maintainability90.4%
Architecture86.2%
Performance84.8%
AI Usage20.2%
Skills & Technologies
Programming Languages
CSSDockerfileElixirHTMLJSONJavaScriptMarkdownPythonSCSSSVG
Technical Skills
API CachingAPI DesignAPI DevelopmentAPI IntegrationAPI MaintenanceAPI RefactoringAsset ManagementAuthenticationBabelBackend DevelopmentBackend IntegrationBrowser CompatibilityBug FixBug FixingBuild Automation
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline