vscode-deephaven

Manages Deephaven server connections and code execution through VS Code MCP tools. Handles connecting to DHC/DHE servers, executing Python/Groovy code via runCode/runCodeFromUri, opening variable panels, troubleshooting connection issues, and retrieving server logs. Use when working with the vscode-deephaven extension's MCP tools - NOT for API documentation or query syntax help.

Write MCP tools for the vscode-deephaven TypeScript MCP server. Use when adding new tools, implementing tool handlers, or creating tests for MCP tools.

Writes unit tests for vscode-deephaven using Vitest and TypeScript. Use when writing tests, adding unit tests for new features, or verifying service/component behavior. Covers test structure, mocking patterns, parameterized tests, and vscode-deephaven-specific conventions.

Queries Deephaven documentation for API help, syntax guidance, and best practices. Provides answers about table operations, filtering, joining, aggregations, plotting, and other Deephaven features in Python or Groovy. Use when learning Deephaven APIs, writing queries, or needing syntax help - does NOT require a running server or connection.