Feature: Add -PromptFromFile parameter to Invoke-QwenTask, Invoke-CodexTask, Invoke-GeminiTask

[eigenverft]

Feature Request: Add -PromptFromFile Parameter to Task Cmdlets

Summary

Add a -PromptFromFile parameter to the following cmdlets to support reading prompts from external files:

• Invoke-QwenTask
• Invoke-CodexTask
• Invoke-GeminiTask

Motivation

Currently, these cmdlets only accept prompts via the -Prompt parameter as inline strings. This creates several issues:

1. Multiline prompts are difficult to handle - PowerShell here-strings can be cumbersome and error-prone when passed as arguments
2. Large prompts clutter scripts - Long prompt templates make scripts harder to read and maintain
3. No easy way to version prompt templates - Storing prompts in separate files allows better version control and reuse
4. Encoding issues - Inline strings may have encoding/escaping problems with special characters

Proposed Solution

Add a new -PromptFromFile parameter that accepts a file path:

# Example usage
Invoke-QwenTask -PromptFromFile "C:\prompts\my-task-prompt.txt"

# Could also support relative paths
Invoke-CodexTask -PromptFromFile ".\prompts\analysis-prompt.md"

# Potential combination with other parameters
Invoke-GeminiTask -PromptFromFile "prompt.txt" -Model "gemini-pro"

Implementation Considerations

1. Parameter validation - Ensure the file exists and is readable
2. Encoding support - Support UTF-8 encoding (with/without BOM)
3. Mutual exclusivity - -Prompt and -PromptFromFile should be mutually exclusive
4. Error handling - Clear error messages if file cannot be read

Example Prompt File

Analyze the following code and identify potential security issues:

1. Check for SQL injection vulnerabilities
2. Look for hardcoded credentials
3. Identify missing input validation

Provide recommendations for each issue found.

Benefits

• ✅ Cleaner scripts with separated concerns
• ✅ Easy reuse of common prompt templates
• ✅ Better support for complex/multiline prompts
• ✅ Simpler prompt iteration and A/B testing
• ✅ Team collaboration on prompt templates