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name: working-with-marimo description: Interactive development in marimo notebooks with validation loops. Use for creating/editing marimo notebooks and verifying execution.

Working with Marimo

Follows a Plan-Execute-Verify loop to ensure notebook correctness.

Feedback Loop

1. Context & Plan:

   • Sessions: mcp_marimo_get_active_notebooks (Find session IDs).
   • Structure: mcp_marimo_get_lightweight_cell_map (See cell IDs/content).
   • Data State: mcp_marimo_get_tables_and_variables (Inspect DataFrames/Variables).
   • Cell Detail: mcp_marimo_get_cell_runtime_data (Code, errors, local vars).

2. Execute:

   • Edit the .py file directly using write or search_replace.
   • Rule: Follow Best Practices (e.g., @app.cell, no global state).

3. Verify (CRITICAL):

   • Lint: mcp_marimo_lint_notebook (Static analysis).
   • Runtime Errors: mcp_marimo_get_notebook_errors (Execution errors).
   • Outputs: mcp_marimo_get_cell_outputs (Visuals/Console).

Common Commands

• Start/Sync: Marimo automatically syncs file changes.
• SQL: Use mo.sql for DuckDB queries.
• Plots: Use plt.gca() or return figure. No plt.show().

Reference

See Best Practices for code formatting, reactivity rules, and UI element usage.