# Component: Legacy config loader

## Responsibility
Load local configuration for the legacy PHP module.
Expose helper access for DB, OpenAI, URLs, endpoints, and path values.
Provide one DB connection factory used by web pages and worker.

## Interfaces
- Input:
  - `config/local.php` if present
  - fallback `config/local.example.php` for shape and safe defaults
- Output:
  - config access helpers
  - mysqli connection helper
  - normalized path values for logs and routes

## Dependencies
- PHP array config files
- `mysqli`
- module root path

## Limits
- Does not manage secret rotation.
- Does not validate remote credentials.
- Does not redesign auth or downstream business logic.

## Success criteria
- [ ] No tracked PHP file contains hard-coded DB or OpenAI secrets
- [ ] Entry points use shared config helper
- [ ] Local setup path is documented
