Document Revision History & Rollback

When Revision History (tool-revisions) is enabled, Standalone Qwiki automatically snapshots the previous version of a document before every content replacement—across inline Markdown edits, HTML/Form saves, file replacements, and headless api/publish.php overwrites.

How Snapshots Are Keyed & Deduplicated

• Persistent docId Identity: Every document receives an immutable docId, so its revision history follows the chapter even if you rename the title, change the slug, or drag it into a different category.
• SHA-256 Deduplication: Before writing a snapshot to data/revisions/{docId}/, Qwiki compares SHA-256 hashes and skips creating redundant snapshots when content hasn't actually changed.
• Configurable Retention: Set Revision History Retention (Snapshots per Document) (revisionsMaxPerDoc, default 20, range 1–200) in ⚙️ Settings ➔ 🌐 General.

Inspecting, Downloading & Restoring Revisions

1. Open any document and click 🕒 (Revision History) in the document toolbar.
2. Browse timestamped snapshots showing author, action source, and byte size.
3. For any snapshot, you can:
   • Preview: View text content directly (or inspect binary metadata for PDFs).
   • Download: Download the raw .bak snapshot file to your workstation.
   • Restore: Perform a lock-verified 1-click rollback. Restoring first snapshots the current live file (so a rollback itself is reversible) and checks soft-lock ownership before writing.