feat: support function folders without function.jsonc file

[kfirstri]

Description

This PR adds auto-detection support for function folders that only contain an index.ts file without a function.jsonc configuration file. Function names are automatically derived from the folder name using kebab-case convention (e.g., MyComplexFunc becomes my-complex-func). This enhancement maintains full backward compatibility with existing function configurations.

Related Issue

Resolves #130

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Other (please describe):

Changes Made

• Added readFunctionFromDirectory() function to detect and load functions without config files by scanning for index.ts
• Updated readAllFunctions() to scan for both configured and auto-detected functions
• Implemented automatic kebab-case conversion for folder names (e.g., MyComplexFunc → my-complex-func)
• Added duplicate name detection to prevent conflicts between configured and auto-detected functions
• Created comprehensive test fixtures covering mixed function types (with and without config files)
• Added test case reads project with mixed functions to verify the feature works correctly

Testing

• I have tested these changes locally
• I have added/updated tests as needed
• All tests pass (npm test)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• I have updated AGENTS.md if I made architectural changes

Additional Notes

The implementation maintains backward compatibility - existing functions with function.json or function.jsonc files continue to work exactly as before. The auto-detection only applies to directories without configuration files. The feature successfully passes all existing and new tests, including lint and type checks.

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_{🤖 Generated by Claude | 2026-01-27 09:35 UTC}

[github-actions]

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[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.