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Marat Dulin

PROFILE

Marat Dulin

Worked extensively on the biomejs/biome repository, delivering nine features and resolving six bugs over eight months. Focused on enhancing linting accuracy and developer experience, they implemented and refined rules for React and Vue, such as useExhaustiveDependencies and noVueDuplicateKeys, using TypeScript, JavaScript, and Rust. Their work included AST manipulation, code analysis, and linter development to reduce false positives, improve diagnostics, and streamline code quality checks. They also contributed to project governance by updating documentation and maintainer lists, and improved build tooling and benchmarking reliability. Their approach emphasized maintainability, test coverage, and alignment with established linting standards.

Overall Statistics

Feature vs Bugs

60%Features

Repository Contributions

21Total
Bugs
6
Commits
21
Features
9
Lines of code
15,493
Activity Months8

Work History

February 2026

2 Commits

Feb 1, 2026

February 2026 monthly summary focusing on key accomplishments for biome repo. Central effort centered on linting improvements to useExhaustiveDependencies, with fixes to dependency reporting and rest parameter handling, accompanied by tests to prevent regressions.

January 2026

2 Commits

Jan 1, 2026

January 2026 monthly summary for biomejs/biome. Focused on improving lint accuracy for React hooks to prevent stale closures and regressions by enhancing the useExhaustiveDependencies rule. Delivered targeted fixes that stabilize dependency detection across common patterns (destructuring, callbacks, stable values) and addressed multiple reported regressions.

December 2025

3 Commits

Dec 1, 2025

December 2025: Delivered targeted linting accuracy improvements for Vue and React, stabilized benchmarking reliability by fixing configuration-driven command failures, and updated lint configurations to streamline CI. These changes reduce false positives, improve benchmark stability, and provide clearer feedback for developers, accelerating safe code changes and overall product quality.

September 2025

3 Commits • 2 Features

Sep 1, 2025

Monthly summary for 2025-09: Delivered targeted lint improvements and contributor governance updates across biomejs/biome and biomejs/website. Key features include refining lint rule reporting for useHookAtTopLevel, adding noVueDuplicateKeys to prevent Vue duplicate keys, and updating the maintainer roster to ensure accurate contributor representation. These changes enhance code quality, reduce noise in lint feedback, improve Vue code consistency, and strengthen project governance. Commits linked include b90611223dbab116c4c1678a374c1a48c29a34a0 (fix(lint): useHookAtTopLevel should not report issues unrelated to the nested hook call (#7406)), cadad2cadbd3852873cbd3f721c26ae7ceb3f39a (feat(lint): implement noVueDuplicateKeys rule (#7542)), and 3b815e5a7a8cf54c7000da07d728388d26441084 (fix: rename user vohoanglong0107 to l0ngvh, add mdevils to the list of maintainers (#3127)).

July 2025

4 Commits • 3 Features

Jul 1, 2025

July 2025 monthly summary for biomejs/biome: Delivered three new linting and tooling capabilities focused on Vue safety and analyzer rule options. Strengthened code quality, diagnostics, and test coverage, with clear business value in safer component authoring and scalable rule configuration.

June 2025

1 Commits • 1 Features

Jun 1, 2025

Month: 2025-06 — biomejs/biome Key accomplishments for the month (biomejs/biome): - Features delivered: Maintainer List Update in CONTRIBUTING.md. Added Marat Dulin (@mdevils) to the maintainers list to clarify project governance and contribution roles. Commit: 29784a28d2227602ad3a44909e2277f10d7cd469 (docs: add mdevils to maintainers (#6612)). Major bugs fixed: None identified this month. Overall impact and accomplishments: Governance clarity is improved, aiding contributor onboarding and reducing ambiguity in roles; supports faster and cleaner PR reviews by having a clearly defined maintainer roster, which enhances project stability and external collaboration. Technologies/skills demonstrated: Documentation updates (Markdown), Git commit hygiene, contributor governance, collaboration and project governance practices.

May 2025

5 Commits • 3 Features

May 1, 2025

May 2025 Biome linting feature delivery focused on consistency, readability, and performance. Delivered three lint rules for biomejs/biome with traceable commits, including a version bump to 2.0.0 for the Adjacent Getter/Setter rule. Also completed a refactor to centralize React component detection logic to support new rules, improving maintainability. These changes improve code quality guidance across projects, reduce risk of misconfigurations and nested component performance issues, and accelerate contributor onboarding.Key outcomes include standardized getter/setter patterns, prevention of nested component definitions, and promotion of concise object manipulation. Technologies demonstrated include ESLint plugin development, AST-based analysis, targeted refactors for rule detection, and semantic versioning.

April 2025

1 Commits

Apr 1, 2025

April 2025 (Month: 2025-04) – Focused on strengthening code quality in the biome repository by extending the noConsole lint rule to detect indirect console usage, including bracket notation and member expressions. This change reduces false negatives, improves lint coverage, and delivers tangible business value by catching console-related issues earlier in CI and PR checks. Delivered via a targeted lint-rule fix in biome repository with commit 230825d5b2b0901e55b17346f758fec0f0ae4be7 (#5648).

Activity

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Quality Metrics

Correctness96.6%
Maintainability92.4%
Architecture89.6%
Performance84.8%
AI Usage23.8%

Skills & Technologies

Programming Languages

HTMLJavaScriptMarkdownRustTypeScript

Technical Skills

AST ManipulationAST manipulationBuild ToolsCode AnalysisCode GenerationCode LintingCode MaintenanceCode refactoringDocumentationFrontend DevelopmentJavaScriptJavaScript analysisLinter DevelopmentLintingReact

Repositories Contributed To

2 repos

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

biomejs/biome

Apr 2025 Feb 2026
8 Months active

Languages Used

JavaScriptRustTypeScriptMarkdown

Technical Skills

Code AnalysisJavaScriptLinter DevelopmentRustAST manipulationCode Maintenance

biomejs/website

Sep 2025 Sep 2025
1 Month active

Languages Used

HTML

Technical Skills

Frontend Development