Problem Description

The current codebase contains duplicated logic for parsing environment variables in getCoreSystemPrompt. The logic to handle switches (e.g., 'true'/'1') and tilde-expanded paths (~/...) is implemented twice. This violates the DRY principle and increases the risk of maintenance errors in the future.

Proposed Solution

Extract this duplicated logic into a single, reusable helper function named resolvePathFromEnv. This will centralize the logic, making the code cleaner and easier to maintain.

Note: I have already completed this refactoring on my local branch and am ready to open a Pull Request to resolve this issue as soon as it's created.