mermaid-js/mermaid
Apr 2026 – May 2026
2 Months active
Languages Used
HTMLJavaScriptTypeScriptYAML
Technical Skills
HTMLJavaScriptTypeScriptdiagrammingfront end developmentgraph algorithms
Simon Jackson
PROFILE
Simon Jackson
Over a two-month period, contributed to the mermaid-js/mermaid repository by enhancing flowchart and state-diagram rendering, focusing on subgraph direction normalization, cluster handling, and explicit direction propagation. Leveraged JavaScript, TypeScript, and Cypress to implement features such as virtual subgraphs for clusters with external connections and an explicitDir flag to control layout decisions. Improved reliability by expanding visual and unit test coverage, addressing edge cases in complex diagrams, and refining CI/CD validation processes. Also resolved a CI lockfile SHA validation bug, ensuring accurate pull request comparisons. The work emphasized robust front end development, graph algorithms, and disciplined testing practices.
Overall Statistics
Feature vs Bugs
67%Features
Repository Contributions
13Total
Bugs
1
Commits
13
Features
2
Lines of code
774
Activity Months2
Your Network
118 peopleWork History
May 2026
9 Commits • 1 Features
May 1, 2026May 2026 monthly summary for mermaid-js/mermaid focusing on delivering robust flowchart/state-diagram rendering, improved cluster behavior, and reliable CI validation. The month prioritized business value: more accurate diagrams for users, fewer PR validation failures, and faster iteration cycles through stronger test coverage and disciplined refactors.
9 Commits • 1 Features
May 1, 2026May 2026 monthly summary for mermaid-js/mermaid focusing on delivering robust flowchart/state-diagram rendering, improved cluster behavior, and reliable CI validation. The month prioritized business value: more accurate diagrams for users, fewer PR validation failures, and faster iteration cycles through stronger test coverage and disciplined refactors.
May 2026
April 2026
4 Commits • 1 Features
Apr 1, 2026April 2026: Implemented Flowchart Subgraph Rendering and Cluster Handling Enhancement, with comprehensive visual test coverage. This update improves rendering accuracy for subgraphs, stabilizes layouts in complex graphs, and enhances support for clusters with external connections, delivering measurable reliability gains for edge-case diagrams.
April 2026
4 Commits • 1 Features
Apr 1, 2026April 2026: Implemented Flowchart Subgraph Rendering and Cluster Handling Enhancement, with comprehensive visual test coverage. This update improves rendering accuracy for subgraphs, stabilizes layouts in complex graphs, and enhances support for clusters with external connections, delivering measurable reliability gains for edge-case diagrams.
Activity
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Quality Metrics
Correctness95.4%
Maintainability86.2%
Architecture87.8%
Performance86.2%
AI Usage20.0%
Skills & Technologies
Programming Languages
HTMLJavaScriptTypeScriptYAML
Technical Skills
CI/CDCypressGitHTMLJavaScriptJavaScript librariesTypeScriptYAMLdiagram renderingdiagrammingflowchart renderingfront end developmentgraph algorithmsgraph visualizationstate management
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline