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Sergei Mikhailov

PROFILE

Sergei Mikhailov

Worked across oat-sa/tao-community, oat-sa/extension-tao-itemqti-pci, and related repositories to deliver features and fixes for audio recording, QTI import fidelity, and environment configuration. Enhanced audio PCI interactions by extending recording durations, consolidating UX, and enforcing playback limits using JavaScript and PHP. Improved backend reliability through dependency management, caching strategies, and robust environment variable handling, leveraging Composer and JSON configuration. Addressed bugs in QTI import style retention and timeout handling, adding regression tests with PHPUnit. Upgraded core dependencies and maintained compatibility with upstream releases, focusing on stability, performance, and maintainability in both frontend and backend development workflows.

Overall Statistics

Feature vs Bugs

69%Features

Repository Contributions

28Total
Bugs
5
Commits
28
Features
11
Lines of code
296,577
Activity Months9

Work History

May 2026

8 Commits • 4 Features

May 1, 2026

May 2026 performance and reliability improvements across oat-sa/tao-core and oat-sa/extension-tao-itemqti-pci. Implemented caching enhancements for environment-management and token handling, added timeout controls for environment configuration requests, and hardened security and test quality. These changes reduce latency, improve resiliency under load, and strengthen security posture while improving maintainability and developer confidence.

April 2026

8 Commits • 2 Features

Apr 1, 2026

April 2026 monthly summary focusing on key developer accomplishments across two repositories: oat-sa/extension-tao-itemqti-pci and oat-sa/tao-core. The month centered on delivering robust Audio Recording interactions for item creation workflows and strengthening environment configuration handling to improve deployment reliability and developer productivity.

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 – Ongoing maintenance and feature delivery for oat-sa/tao-community. Delivered a critical upgrade by updating the OAT TAO ItemQTI Extension to 31.6.0, aligning with the latest features and fixes. No major bugs fixed this month. Overall impact: improved product stability, backward compatibility with the latest ItemQTI capabilities, and readiness for upcoming features. Technologies demonstrated: PHP, Composer dependency management, release tagging, and regression validation.

December 2025

2 Commits • 1 Features

Dec 1, 2025

December 2025 monthly summary for oat-sa/extension-tao-itemqti-pci: Implemented Audio Recording Interaction for Non-IMS PCI with consolidated UX, recording limits, and bundled assets to support recording, playback, and visual feedback. Added production-worthy fixes and asset packaging to improve reliability and performance in PCI items.

September 2025

2 Commits

Sep 1, 2025

In September 2025, delivered reliability and maintenance improvements for the oat-sa/extension-tao-testqti extension. Key changes include robust timeout handling to permit empty responses and an upstream dependency upgrade to tao-test-runner-qti-fe v4.3.3. These updates reduce session-errors in timed assessments, improve user experience, and align the project with the latest upstream fixes, supporting smoother production runs and lower support overhead.

July 2025

4 Commits • 2 Features

Jul 1, 2025

July 2025 monthly summary focusing on key accomplishments across oat-sa/tao-community and oat-sa/extension-tao-testqti. Upgraded core dependencies for improved stability, performance, and compatibility; implemented a timeout handling bug fix with expanded tests; maintained traceability via commit references.

February 2025

1 Commits

Feb 1, 2025

February 2025: Focused on preserving data fidelity during QTI imports in the itemQTI extension. Delivered a bug fix to keep the style attribute intact when importing QTI files, along with regression tests to ensure ongoing retention of style attributes. This work improves presentation fidelity, reduces post-import adjustments, and strengthens overall import reliability across platforms. The changes support better rendering consistency and reduce support overhead.

January 2025

1 Commits

Jan 1, 2025

Monthly summary for 2025-01 focusing on stability and reliability of dependency management and service initialization in oat-sa/tao-community. Implemented a targeted dependency lockfile fix to ensure the project uses the latest stable dependencies and to prevent service initialization issues when IDs are missing.

November 2024

1 Commits • 1 Features

Nov 1, 2024

November 2024 monthly summary focusing on extending the Audio PCI recording duration for QTI Item PCI and updating the configuration registry to support a 30-minute limit. This enhances user experience for longer audio responses and reduces need for user interventions during assessments.

Activity

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Quality Metrics

Correctness91.4%
Maintainability85.0%
Architecture82.2%
Performance83.6%
AI Usage21.4%

Skills & Technologies

Programming Languages

JSONJavaScriptPHPXMLYAML

Technical Skills

API developmentAPI integrationBackend DevelopmentComposerConfiguration ManagementDatabase MigrationDependency ManagementFrontend DevelopmentJSON configuration managementJavaScriptPHPPHPUnitUI/UX designUnit Testingback end development

Repositories Contributed To

5 repos

Overview of all repositories you've contributed to across your timeline

oat-sa/extension-tao-itemqti-pci

Nov 2024 May 2026
4 Months active

Languages Used

PHPJSONJavaScriptXMLYAML

Technical Skills

Configuration ManagementDatabase MigrationJavaScriptUI/UX designfront end developmenttesting

oat-sa/tao-core

Apr 2026 May 2026
2 Months active

Languages Used

PHP

Technical Skills

PHPbackend developmentAPI developmentAPI integrationcaching strategiesobject-oriented programming

oat-sa/tao-community

Jan 2025 Feb 2026
3 Months active

Languages Used

JSONPHP

Technical Skills

Dependency ManagementComposerPHPdependency managementversion control

oat-sa/extension-tao-testqti

Jul 2025 Sep 2025
2 Months active

Languages Used

PHPJavaScript

Technical Skills

PHPUnitUnit TestingBackend DevelopmentDependency ManagementFrontend Development

oat-sa/extension-tao-itemqti

Feb 2025 Feb 2025
1 Month active

Languages Used

PHP

Technical Skills

PHPback end developmentunit testing