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BytesAgain β€Ί Skills β€Ί Code Runner
πŸ¦€ ClawHub

Code Runner

by @formulahendry

Run code snippets in 30+ programming languages including JavaScript, Python, TypeScript, Java, C, C++, Go, Rust, Ruby, PHP, and more. Use when the user wants...

Versionv0.1.0
Downloads2,505
Installs13
#coding#writing#translation#legal
TERMINAL
clawhub install code-runner

πŸ“– About This Skill

name: code-runner description: Run code snippets in 30+ programming languages including JavaScript, Python, TypeScript, Java, C, C++, Go, Rust, Ruby, PHP, and more. Use when the user wants to execute code, test algorithms, verify output, run scripts, or check code behavior. Supports both interpreted and compiled languages.

Code Runner Skill

This skill enables you to run code snippets in multiple programming languages directly from the command line.

When to Use This Skill

Use this skill when:

  • The user wants to run or execute a code snippet
  • Testing algorithm implementations or logic
  • Verifying expected output of code
  • Running quick scripts or one-liners
  • Checking syntax or runtime behavior
  • Demonstrating code functionality

    • Supported Languages

    The following languages are supported (requires the interpreter/compiler to be installed):

    | Language | Command | File Extension | |----------|---------|----------------| | JavaScript | node | .js | | TypeScript | ts-node | .ts | | Python | python | .py | | Java | java (compile & run) | .java | | C | gcc (compile & run) | .c | | C++ | g++ (compile & run) | .cpp | | Go | go run | .go | | Rust | rustc (compile & run) | .rs | | Ruby | ruby | .rb | | PHP | php | .php | | Perl | perl | .pl | | Lua | lua | .lua | | R | Rscript | .r | | Swift | swift | .swift | | Kotlin | kotlin | .kts | | Scala | scala | .scala | | Groovy | groovy | .groovy | | Dart | dart | .dart | | Julia | julia | .jl | | Haskell | runhaskell | .hs | | Clojure | clojure | .clj | | F# | dotnet fsi | .fsx | | C# | dotnet script | .csx | | PowerShell | pwsh | .ps1 | | Bash | bash | .sh | | Batch | cmd /c | .bat | | CoffeeScript | coffee | .coffee | | Crystal | crystal | .cr | | Elixir | elixir | .exs | | Nim | nim compile --run | .nim | | OCaml | ocaml | .ml | | Racket | racket | .rkt | | Scheme | scheme | .scm | | Lisp | sbcl --script | .lisp |

    See references/LANGUAGES.md for detailed language configuration.

    How to Run Code

    Step 1: Identify the Language

    Determine the programming language from:

  • User's explicit request (e.g., "run this Python code")
  • File extension if provided
  • Code syntax patterns

    • Step 2: Execute Using the Runner Script

    ⚠️ Important for AI Agents: Use stdin to avoid escaping issues with quotes, backslashes, and special characters.

    Recommended Method (stdin): 

    echo "" | node scripts/run-code.cjs

    Alternative Method (CLI argument - for simple code only): 

    node scripts/run-code.cjs  ""

    Example - JavaScript: 

    echo "console.log('Hello, World!')" | node scripts/run-code.cjs javascript

    Example - Python: 

    echo "print('Hello, World!')" | node scripts/run-code.cjs python

    Example - Java (multi-line): 

    echo "public class Test {
    public static void main(String[] args) {
        System.out.println(\"Hello from Java!\");
    }
}" | node scripts/run-code.cjs java

    Example - Multi-line code from variable: 

    # In bash
CODE='import math
print("Pi:", math.pi)
print("Result:", math.factorial(5))'
echo "$CODE" | node scripts/run-code.cjs python
    In PowerShell (inline here-string)
    
@"
import math
print("Pi:", math.pi)
print("Result:", math.factorial(5))
"@ | node scripts/run-code.cjs python

    Step 3: Return Results

  • Show the output (stdout) to the user
  • If there are errors (stderr), explain what went wrong
  • Suggest fixes for common errors

    • Platform Notes

    Windows

  • Use cmd /c for batch scripts
  • PowerShell scripts require pwsh or powershell
  • Path separators use backslash \

    • macOS / Linux

  • Bash scripts work natively
  • Swift available on macOS
  • Use #!/usr/bin/env shebang for portable scripts

    • Error Handling

    Common issues and solutions:

    1. Command not found: The language interpreter is not installed or not in PATH - Suggest installing the required runtime - Provide installation instructions

    2. Syntax errors: Code has syntax issues - Show the error message - Point to the line number if available

    3. Runtime errors: Code runs but fails during execution - Display the stack trace - Explain the error type

    4. Timeout: Code takes too long (default: 30 seconds) - Warn about infinite loops - Suggest optimizations

    Security Considerations

    ⚠️ Important: Running arbitrary code can be dangerous. Always:

    1. Review the code before execution 2. Be cautious with code that: - Accesses the file system - Makes network requests - Executes system commands - Modifies environment variables 3. Consider running in a sandboxed environment for untrusted code

    Examples

    Example 1: Run a JavaScript calculation

    echo "console.log(Array.from({length: 10}, (_, i) => i * i))" | node scripts/run-code.cjs javascript
    Output: [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

    Example 2: Run Python with imports

    echo "import math; print(math.factorial(10))" | node scripts/run-code.cjs python
    Output: 3628800

    Example 3: Test a Go function

    echo 'package main; import "fmt"; func main() { fmt.Println("Hello from Go!") }' | node scripts/run-code.cjs go
    Output: Hello from Go!

    πŸ’‘ Examples

    Example 1: Run a JavaScript calculation

    echo "console.log(Array.from({length: 10}, (_, i) => i * i))" | node scripts/run-code.cjs javascript
    Output: [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]

    Example 2: Run Python with imports

    echo "import math; print(math.factorial(10))" | node scripts/run-code.cjs python
    Output: 3628800

    Example 3: Test a Go function

    echo 'package main; import "fmt"; func main() { fmt.Println("Hello from Go!") }' | node scripts/run-code.cjs go
    Output: Hello from Go!