improvement(code): add wand config and system prompt for python code generation, strip \n from stdout in JS/Python

[waleedlatif1]

Summary

• add wand config and system prompt for python code generation so it is able to generate python code
• strip \n from stdout in JS/Python (same way jupyter notebook and repl's do it)
• remove RCE state management that is no longer used now that the toggle is gone

Type of Change

• Bug fix

Testing

Tested manually

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Preview	Comments	Updated (UTC)
docs	Skipped			Nov 9, 2025 0:39am

[greptile-apps]

Greptile Overview

Greptile Summary

Enhances Python code generation and improves stdout formatting across JavaScript and Python execution paths.

Key Changes:

• Added PYTHON_AI_PROMPT system prompt in code.tsx with detailed instructions for AI-generated Python code, including parameter referencing (<paramName>) and environment variable syntax ({{ENV_VAR}})
• Implemented dynamic wand config that applies Python-specific prompt and placeholder when Python language is selected
• Introduced cleanStdout() function in route.ts that strips one trailing newline from all execution outputs (VM and E2B paths)
• Enhanced E2B execution in e2b.ts to remove trailing empty lines after filtering result markers
• Removed unused remoteExecution state management from code editor component

Impact:
The changes improve UX by making stdout display match REPL/notebook behavior (no extra trailing newlines) and enable better AI-assisted Python code generation with language-specific prompts.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The changes are well-contained, focused improvements with clear intent. The stdout cleaning logic is simple and defensive (only removes one trailing newline if present). The Python AI prompt addition is purely additive and doesn't affect existing JavaScript functionality. The removal of unused remoteExecution code is clean refactoring. All changes follow existing patterns in the codebase.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
apps/sim/app/api/function/execute/route.ts	5/5	Added cleanStdout() helper to strip trailing newlines from execution output, applied consistently across all execution paths (VM and E2B)
apps/sim/lib/execution/e2b.ts	5/5	Enhanced E2B execution to remove trailing empty lines from stdout after filtering result markers, improving output consistency
apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel-new/components/editor/components/sub-block/components/code/code.tsx	5/5	Removed remoteExecution state management (now unused), added Python-specific AI prompt and dynamic wand config based on language selection

Sequence Diagram

sequenceDiagram
participant User
participant CodeEditor as Code Editor Component
participant WandHook as useWand Hook
participant ExecuteAPI as /api/function/execute
participant E2B as E2B Sandbox
Note over CodeEditor: User selects Python language
CodeEditor->>CodeEditor: dynamicWandConfig computed<br/>PYTHON_AI_PROMPT applied
CodeEditor->>WandHook: Initialize with dynamicWandConfig
User->>CodeEditor: Write/generate Python code
CodeEditor->>ExecuteAPI: POST code with language='python'
ExecuteAPI->>ExecuteAPI: resolveCodeVariables()<br/>Wrap code with prologue
ExecuteAPI->>E2B: executeInE2B(code, 'python', timeout)
E2B->>E2B: runCode() in sandbox
E2B->>E2B: Filter __SIM_RESULT__ marker
E2B->>E2B: Remove trailing empty line
E2B-->>ExecuteAPI: {result, stdout, sandboxId}
ExecuteAPI->>ExecuteAPI: cleanStdout(stdout)<br/>Strip trailing \n
ExecuteAPI-->>CodeEditor: {success, output: {result, stdout}}
CodeEditor-->>User: Display cleaned output

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