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Overview

PraisonAI functions as a real AI code editor that can:
  • Edit files on disk
  • Run terminal commands (pytest, ruff, etc.)
  • Observe failures and fix them
  • Converge to green tests
This guide covers 10 real-world scenarios demonstrating these capabilities.

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CLI Contract (January 2026)

CommandDescriptionKey Flags
praisonai chatTerminal-native REPL-m, -w, -f, -c, -s
praisonai codeTerminal-native code assistant-m, -w, -f, -c, -s
praisonai tuiFull TUI interface-w, -s, -m
praisonai ui chatBrowser-based chat--port, --host
praisonai ui codeBrowser-based code--port, --host

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Key Flags

FlagDescription
-m, --modelLLM model to use (default: gpt-4o-mini)
-w, --workspaceWorking directory for file operations
-f, --fileAttach file(s) to prompt
-c, --continueContinue last session
-s, --sessionResume specific session ID
--no-acpDisable ACP tools
--no-lspDisable LSP tools

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Auto-Approval for Automation

Set PRAISON_APPROVAL_MODE=auto to enable non-interactive tool execution: 
PRAISON_APPROVAL_MODE=auto praisonai code -w . "Fix the bug"

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Prerequisites

pip install praisonai praisonaiagents
export OPENAI_API_KEY=your-key-here

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AI Code Editor Scenarios

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1. Implement Code from Specification

Implement a function and run tests until they pass. 
praisonai chat -w . -m gpt-4o-mini "Implement the celsius_to_fahrenheit function in src/converter.py. Formula: F = C * 9/5 + 32. Run pytest to verify."
What happens:
  1. Agent reads the existing file
  2. Implements the function with the formula
  3. Runs pytest to verify
  4. If tests fail, fixes and reruns

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2. Fix Division by Zero Bug

Fix a bug that causes test failures. 
praisonai chat -w . -m gpt-4o-mini "Fix the divide method in calculator.py to raise ValueError('Cannot divide by zero') when b is 0. Run pytest to verify."
What happens:
  1. Agent reads the buggy code
  2. Adds the zero-check with proper error
  3. Runs tests to confirm the fix
  4. Iterates until tests pass

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3. Implement Missing Function

Implement a function that’s currently a stub. 
praisonai chat -w . -m gpt-4o-mini "Implement the mode function in stats.py. Mode returns the most frequent value. Run pytest -k mode to verify."
What happens:
  1. Agent reads the stub function
  2. Implements the logic using Counter or similar
  3. Runs targeted tests
  4. Fixes any edge cases

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4. Fix Empty List Handling

Add proper error handling for edge cases. 
praisonai chat -w . -m gpt-4o-mini "Fix mean() in stats.py to raise ValueError('Cannot calculate mean of empty list') for empty input. Run pytest -k mean."
What happens:
  1. Agent adds input validation
  2. Raises appropriate error
  3. Verifies with tests

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5. Add CLI Command

Extend a CLI with a new command. 
praisonai chat -w . -m gpt-4o-mini "Add a 'version' command to cli.py that prints __version__. Test with: python -m myapp.cli version"
What happens:
  1. Agent reads the CLI code
  2. Adds the version subcommand
  3. Runs the command to verify output

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6. Fix Lint Errors

Clean up code style issues. 
praisonai chat -w . -m gpt-4o-mini "Run ruff check . to find lint errors. Fix all errors. Run ruff again to verify."
What happens:
  1. Agent runs ruff check .
  2. Reads the error output
  3. Fixes each issue (unused imports, whitespace, etc.)
  4. Reruns ruff until clean

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7. Implement Temperature Conversion

Implement the reverse conversion function. 
praisonai chat -w . -m gpt-4o-mini "Implement fahrenheit_to_celsius in converter.py. Formula: C = (F - 32) * 5/9. Run pytest -k fahrenheit."
What happens:
  1. Agent implements the function
  2. Runs targeted tests
  3. Fixes any precision issues

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8. Fix Median Edge Case

Handle empty list in median function. 
praisonai chat -w . -m gpt-4o-mini "Fix median() in stats.py to raise ValueError('Cannot calculate median of empty list') for empty input. Run pytest -k median."
What happens:
  1. Agent adds the validation check
  2. Runs tests to verify
  3. Ensures existing tests still pass

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9. Add Type Hints

Improve code with type annotations. 
praisonai chat -w . -m gpt-4o-mini "Add type hints to all methods in calculator.py. Example: def add(self, a: float, b: float) -> float:"
What happens:
  1. Agent reads the file
  2. Adds parameter and return type hints
  3. Optionally runs mypy to verify

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10. Make All Tests Pass

Fix all remaining issues in a project. 
praisonai chat -w . -m gpt-4o-mini "Run pytest to see failing tests. Fix each one by implementing missing functions and fixing bugs. Keep going until ALL tests pass."
What happens:
  1. Agent runs full test suite
  2. Identifies all failures
  3. Fixes each one systematically
  4. Reruns until 100% pass

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Key Flags

FlagDescription
-w, --workspaceSet working directory for file operations
-m, --modelLLM model to use (default: gpt-4o-mini)
-c, --continueContinue previous session
-f, --fileAttach file(s) to prompt
-s, --sessionResume specific session ID

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The Closed-Loop Workflow

PraisonAI implements a closed-loop workflow similar to OpenCode: 
Agent → Edit File → Run Tests → Read Output → Fix → Repeat
This means:
  • The agent runs commands itself (not you)
  • The agent reads test output itself
  • The agent iterates until success

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Tips for Best Results

  1. Use Workspace Flag: Always use -w . to enable file editing
  2. Be Specific: Include file paths and expected behavior
  3. Request Verification: Ask the agent to run tests after changes
  4. Use Cheap Models: Start with gpt-4o-mini for cost efficiency
  5. Continue Sessions: Use --continue for multi-step tasks

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Troubleshooting

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Agent Not Editing Files

Ensure you’re using the workspace flag: 
praisonai chat -w . "your prompt"

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Tests Not Running

Make sure pytest is installed in your environment: 
pip install pytest

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API Key Issues

Set your API key: 
export OPENAI_API_KEY=your-key-here