pmndrs/valtio
Nov 2025 – Nov 2025
1 Month active
Languages Used
JavaScriptMarkdown
Technical Skills
Reactdocumentationstate management
Joshua Tjhin
PROFILE
Joshua Tjhin
Worked on targeted bug fixes and documentation improvements across Valtio and braintrust-sdk repositories, focusing on reliability and developer experience. In pmndrs/valtio, addressed a common issue where controlled inputs lost caret position by clarifying the need for synchronous state updates and providing a practical React code example in the documentation, using JavaScript and Markdown. For braintrustdata/braintrust-sdk, improved Anthropic instrumentation by ensuring the system message is logged first to match API input order, updating Node.js logic, adding unit tests, and validating changes through comprehensive CI runs. Emphasized clear communication, robust testing, and precise state management throughout both projects.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
2Total
Bugs
2
Commits
2
Features
0
Lines of code
192
Activity Months2
Your Network
62 peopleWork History
June 2026
1 Commits
Jun 1, 2026June 2026 monthly summary for braintrust-sdk: Focused on Anthropic instrumentation alignment to ensure the system message is logged first in the span input to match the API input order. Implemented by updating coalesceInput to prepend the system message, added unit tests, and updated end-to-end snapshots. Regenerated E2E span-tree snapshots and validated changes via CI: 1070 core tests passed; anthropic-instrumentation E2E scenario passed in two runs (184/184). TS type-check and Prettier checks clean. This work improves reliability, reproducibility, and data integrity for Anthropic integration, reducing debugging time and ensuring the correct model prompt order across logs and playback sessions.
1 Commits
Jun 1, 2026June 2026 monthly summary for braintrust-sdk: Focused on Anthropic instrumentation alignment to ensure the system message is logged first in the span input to match the API input order. Implemented by updating coalesceInput to prepend the system message, added unit tests, and updated end-to-end snapshots. Regenerated E2E span-tree snapshots and validated changes via CI: 1070 core tests passed; anthropic-instrumentation E2E scenario passed in two runs (184/184). TS type-check and Prettier checks clean. This work improves reliability, reproducibility, and data integrity for Anthropic integration, reducing debugging time and ensuring the correct model prompt order across logs and playback sessions.
June 2026
November 2025
1 Commits
Nov 1, 2025November 2025: Delivered docs update and a practical code example for caret position preservation in Valtio-controlled inputs. This focused bug-related improvement clarifies the need for 'sync: true' to prevent caret loss during input events, with an explicit example to guide developers. The change improves form reliability, reduces UX glitches, and strengthens developer DX when using Valtio for form-heavy UIs.
November 2025
1 Commits
Nov 1, 2025November 2025: Delivered docs update and a practical code example for caret position preservation in Valtio-controlled inputs. This focused bug-related improvement clarifies the need for 'sync: true' to prevent caret loss during input events, with an explicit example to guide developers. The change improves form reliability, reduces UX glitches, and strengthens developer DX when using Valtio for form-heavy UIs.
Activity
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Quality Metrics
Correctness100.0%
Maintainability90.0%
Architecture90.0%
Performance90.0%
AI Usage50.0%
Skills & Technologies
Programming Languages
JavaScriptMarkdownTypeScript
Technical Skills
Node.jsReactdocumentationfull stack developmentstate managementtesting
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
braintrustdata/braintrust-sdk
Jun 2026 – Jun 2026
1 Month active
Languages Used
JavaScriptTypeScript
Technical Skills
Node.jsfull stack developmenttesting