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Vasilii Ermilov

PROFILE

Vasilii Ermilov

Worked on the semgrep/semgrep-rules repository, delivering features and fixes focused on CI/CD reliability, code quality, and security rule precision. Upgraded GitHub Actions workflows to Ubuntu 22.04 and Python 3.10, aligning the CI environment with current best practices and improving build stability. Enhanced maintainability by updating Semgrep lint rules and pre-commit actions, streamlining PR validation and standardizing code checks. Refined Terraform security rule classifications by updating CWE mappings for more accurate risk assessment. Addressed a misleading unsafe deserialization warning, clarifying messaging to reduce false positives. Utilized technologies including YAML configuration, Terraform, GitHub Actions, and Python throughout these improvements.

Overall Statistics

Feature vs Bugs

75%Features

Repository Contributions

5Total
Bugs
1
Commits
5
Features
3
Lines of code
2,007
Activity Months4

Work History

February 2026

1 Commits

Feb 1, 2026

February 2026 monthly summary focusing on key accomplishments in the semgrep-rules repository. Delivered a targeted fix to the Unsafe Deserialization Warning Clarification to reduce false positives and improve correctness of security warnings. Removed references to external libraries in the warning message and clarified the need for concrete struct types to ensure protection is not misinterpreted as automatic. The change is isolated to the semgrep-rules project and aligns with our commitment to improving developer experience and security posture.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary for semgrep-rules: Key feature delivered: Security rule classification refinement (CWE mapping) for Terraform security rule configurations, increasing precision by changing CWE mapping from CWE-284: Improper Access Control to CWE-1220: Insufficient Granularity of Access Control. This change improves risk assessment, audit readiness, and maintainability of Terraform rules. No major bugs fixed this month. Overall impact: more accurate classifications, better rule governance, and traceable changes. Technologies/skills demonstrated: CWE taxonomy, Terraform rule configurations, Semgrep rules, commit-based traceability, and changes in security classification workflows.

April 2025

2 Commits • 1 Features

Apr 1, 2025

April 2025 — semgrep-rules delivered key code quality and CI improvements: lint rule updates to boost maintainability and a pre-commit action upgrade to v3.0.1 for newer features and fixes. No major bugs fixed this month. Impact: reduced maintenance burden, faster PR validation, and more reliable CI checks. Technologies: Semgrep lint rules, pre-commit, GitHub Actions, CI/CD tooling.

March 2025

1 Commits • 1 Features

Mar 1, 2025

Monthly summary for 2025-03 focused on semgrep/semgrep-rules. Delivered a CI/CD upgrade improving build stability and security by moving GitHub Actions runners to Ubuntu 22.04 and Python 3.10. No major bugs fixed this month for semgrep-rules. The change positions the project for future dependency upgrades and smoother releases.

Activity

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Quality Metrics

Correctness98.0%
Maintainability96.0%
Architecture96.0%
Performance92.0%
AI Usage20.0%

Skills & Technologies

Programming Languages

YAMLjavascriptjsonpythontypescriptyaml

Technical Skills

CI/CDCloud SecurityDevSecOpsGitHub ActionsTerraformYAML configurationjavascriptjsonlintingpythonrule definitionsecurity best practicesstatic analysistypescriptyaml

Repositories Contributed To

1 repo

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

semgrep/semgrep-rules

Mar 2025 Feb 2026
4 Months active

Languages Used

YAMLjavascriptjsonpythontypescriptyaml

Technical Skills

CI/CDGitHub Actionsjavascriptjsonlintingpython