[Bug] CLAUDE.md symlink creation fails when file already exists (not a symlink)

[AlexGounin]

🧠 Summary

During AIDD installation, when CLAUDE.md already exists as a regular file (not a symlink), the installer fails to replace it with the AIDD symlink despite user confirmation.

🌟 Objective / Problem

When installing AIDD in a project that already has a CLAUDE.md file:

1. Installer prompts "Replace with AIDD symlink? Yes - replace"
2. User confirms replacement
3. Warning appears: "Target exists and is not a directory or symlink"
4. The symlink is NOT created, leaving the original file in place

Expected: The installer should backup/remove the existing file and create the symlink.

🛠️ Proposed Solution

Options to consider:

1. Backup & Replace: Rename existing CLAUDE.md → CLAUDE.md.backup before creating symlink
2. Force removal: Delete existing file when user confirms replacement
3. Merge strategy: Append existing content to AIDD template (for memory-bank generation)

🫡 Acceptance Criteria (Gherkin format)

Scenario: Replace existing CLAUDE.md with symlink

Given a project with existing CLAUDE.md file (not a symlink)
When user runs AIDD installation
And user selects "Yes - replace" for CLAUDE.md
Then the existing CLAUDE.md should be backed up or removed
And a symlink to AIDD CLAUDE.md should be created
And installation should complete without warnings

🔍 Context / Technical Constraints

• macOS Darwin 25.1.0
• AIDD CLI via npx aidd
• .claude/agents symlink worked correctly
• Only CLAUDE.md symlink failed

📎 Attachments / References

Installation output:

✓ Dependencies installed successfully
? Target already exists at .../CLAUDE.md. Replace with AIDD symlink? Yes - replace
⚠ Target exists and is not a directory or symlink: .../CLAUDE.md
⚠ Installation completed with warnings

📷 Screenshot available - will be added in comments

[AlexGounin]

[ericelliott]

What branch/version are you referring to? Current latest on main does not include support for replacing ore symlinking CLAUDE.md, as far as I recall?