---
created_by: "Generated by AI gpt-5-codex on 2026-06-06T00:00:00Z. Human review required."
---

# Upload Slice

## Scope Delivered

- Single-file upload into the current allowed folder
- Root-bound destination validation
- Success and failure feedback
- Collision handling with explicit confirmation before replacement
- CSRF protection and auth enforcement

## Implementation Notes

- The read-only browse page stays read-only and only links to upload.
- The upload page stages a replacement upload outside the approved browse root before confirmation.
- A replacement can be canceled before committing the staged file.
- The current folder is shown clearly on the upload page with breadcrumbs.

## Files Added

- `app/upload.php`
- `public/upload.php`
- `storage/.upload-stage/.gitkeep`

## Files Updated

- `app/auth.php`
- `public/files.php`
- `.agent/implementation-log.md`