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Dmitrij Kosmakov

PROFILE

Dmitrij Kosmakov

Developed and maintained the QuackStore extension for the duckdb/community-extensions repository, focusing on accelerating remote file queries through block-level caching and intelligent data access optimizations. Leveraged C++ and YAML to implement robust build system configuration, dependency management, and version control practices, ensuring compatibility across multiple DuckDB releases. Addressed a critical bug to improve extension stability and upgraded the extension through several versions, aligning with DuckDB 1.4.1, 1.4.2, 1.4.4, and 1.5.2. Prioritized repository maintainability by updating metadata and references, managing platform-specific build exclusions, and preparing the codebase for ongoing upgrade cycles and future feature development.

Overall Statistics

Feature vs Bugs

86%Features

Repository Contributions

7Total
Bugs
1
Commits
7
Features
6
Lines of code
36
Activity Months4

Work History

May 2026

1 Commits • 1 Features

May 1, 2026

May 2026: QuackStore extension upgraded to 1.0.2 in duckdb/community-extensions; aligned with DuckDB 1.5.2 via latest commit. No major bugs fixed. Impact: keeps the extension current, reduces compatibility risk, enabling smoother deployments and readiness for future feature work. Technologies/skills demonstrated: extension development, versioning, dependency management, Git commit tracing, and cross-repo coordination.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 monthly summary for the duckdb/community-extensions repo. Focus was on upgrading the QuackStore extension to version 1.0.1 to align with DuckDB 1.4.4 and to implement remote file caching enhancements. The work emphasized compatibility, performance improvements for remote data access, and preparing the repository for ongoing upgrade cycles. No major bugs were reported/fixed this month. Overall impact: improved extension reliability and readiness for future DuckDB releases, with measurable gains in caching efficiency and reduced remote-data latency.

November 2025

1 Commits

Nov 1, 2025

Month 2025-11 — Summary focusing on stability and business value for the duckdb/community-extensions repo. Delivered a critical bug fix for the QuackStore extension and upgraded DuckDB to 1.4.2 to maintain compatibility and unlock improvements. All work is traceable to commit d577f093a7d539d7efd524306762afc2607a5a8b. This reduces production risk, improves reliability for downstream users, and positions the project for smoother upgrades in subsequent cycles.

October 2025

4 Commits • 4 Features

Oct 1, 2025

This month delivered the QuackStore extension and related build/compatibility updates for the duckdb/community-extensions repository, with a focus on performance, build stability, and dependency alignment. Key outcomes include a block-level caching extension for remote files, environment-targeted build exclusions, up-to-date repository references, and DuckDB 1.4.1 compatibility. No major bugs were reported in this period; changes are feature improvements and lifecycle maintenance with clear traceability.

Activity

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Quality Metrics

Correctness97.2%
Maintainability97.2%
Architecture97.2%
Performance97.2%
AI Usage22.8%

Skills & Technologies

Programming Languages

C++YAML

Technical Skills

Build System ConfigurationC++ developmentC++ programmingConfiguration ManagementExtension Developmentdatabase optimizationdependency managementextension developmentversion control

Repositories Contributed To

1 repo

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

duckdb/community-extensions

Oct 2025 May 2026
4 Months active

Languages Used

YAMLC++

Technical Skills

Build System ConfigurationConfiguration ManagementExtension Developmentdependency managementextension developmentC++ development