DefinitelyTyped/DefinitelyTyped
Nov 2025 – Jul 2026
2 Months active
Languages Used
TypeScript
Technical Skills
TestingType DefinitionsTypeScriptAPI DevelopmentAPI Testing
Steffen Schroeder
PROFILE
Steffen Schroeder
Worked on the DefinitelyTyped/DefinitelyTyped repository to enhance TypeScript type definitions for widely used testing libraries. Focused on aligning Sinon.js typings with versions 20 and 21 by removing deprecated properties and ensuring compatibility, which improved type safety and reduced type-related issues for downstream TypeScript projects. Later, delivered generic type support for Supertest and Superagent, enabling more precise typing of API request and response bodies in API testing scenarios. This work included updating and adding tests to validate the new typings, ultimately improving developer experience, reducing runtime type errors, and supporting safer, more maintainable code for TypeScript users in testing workflows.
Overall Statistics
Feature vs Bugs
100%Features
Repository Contributions
4Total
Bugs
0
Commits
4
Features
2
Lines of code
395
Activity Months2
Your Network
1319 peopleShared Repositories
568
Work History
July 2026
2 Commits • 1 Features
Jul 1, 2026July 2026: Focused on strengthening type safety for API testing typings in DefinitelyTyped. Delivered generic type support for Supertest's expected response body and Superagent's request body, with accompanying tests to demonstrate and validate usage. The work elevates type safety for TS users, reduces runtime type errors in API testing code, and improves developer experience when consuming API testing typings. Two PRs by @SchroederSteffen were merged, consolidating changes across typings and test coverage. Overall impact includes safer test code, clearer typings, and faster onboarding for teams leveraging API testing libraries.
2 Commits • 1 Features
Jul 1, 2026July 2026: Focused on strengthening type safety for API testing typings in DefinitelyTyped. Delivered generic type support for Supertest's expected response body and Superagent's request body, with accompanying tests to demonstrate and validate usage. The work elevates type safety for TS users, reduces runtime type errors in API testing code, and improves developer experience when consuming API testing typings. Two PRs by @SchroederSteffen were merged, consolidating changes across typings and test coverage. Overall impact includes safer test code, clearer typings, and faster onboarding for teams leveraging API testing libraries.
July 2026
November 2025
2 Commits • 1 Features
Nov 1, 2025Concise monthly summary for 2025-11: Focused on aligning DefinitelyTyped's Sinon type definitions with the latest Sinon releases to improve type safety and developer experience for TypeScript users. Delivered updated TypeScript definitions for Sinon v20 (removing deprecated properties/methods) and ensured compatibility with v21. This work reduces type noise, prevents type-related issues for downstream projects, and strengthens confidence in the DefinitelyTyped typings across the ecosystem.
November 2025
2 Commits • 1 Features
Nov 1, 2025Concise monthly summary for 2025-11: Focused on aligning DefinitelyTyped's Sinon type definitions with the latest Sinon releases to improve type safety and developer experience for TypeScript users. Delivered updated TypeScript definitions for Sinon v20 (removing deprecated properties/methods) and ensured compatibility with v21. This work reduces type noise, prevents type-related issues for downstream projects, and strengthens confidence in the DefinitelyTyped typings across the ecosystem.
Activity
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Quality Metrics
Correctness100.0%
Maintainability100.0%
Architecture100.0%
Performance100.0%
AI Usage40.0%
Skills & Technologies
Programming Languages
TypeScript
Technical Skills
API DevelopmentAPI TestingTestingType DefinitionsTypeScript
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline