Diff viewer

Word-level diffs, change classification, summary bar, n/p shortcuts, one-click rollback. Visualize prompt evolution.

Try the diff viewer

Compare two prompt versions — see additions, deletions, and the summary bar.

Opening version history

1. Open any session
2. Click History tab (clock icon) or press H
3. Version list appears on the right, newest first

┌────────────────────────────────────────────────────┐
│ History                          [Close]  [Compare]│
├────────────────────────────────────────────────────┤
│ v5  2h ago    "Added tone variable"      [●]       │
│ v4  1d ago    "Fixed typo in greeting"   [○]       │
│ v3  3d ago    "Added CTA section"        [○]       │
│ v2  1w ago    "Initial draft"            [○]       │
│ v1  2w ago    "Empty template"           [○]       │
└────────────────────────────────────────────────────┘

• ● = current version
• Click any version to load the diff against current
• Click Compare to pick two arbitrary versions

Diff view anatomy

┌─────────────────────────────────────────────────────────────┐
│ Summary: 3 added, 1 removed, 2 changed  [Rollback to v3]   │
├─────────────────────────────────────────────────────────────┤
│ v5 (current)                              v3                │
│ ────────────────────────────────────────────────────────────│
│ Write a {{tone}} email to {{client}}       │ Write a email  │
│ about {{topic}}.                           │ to {{client}}  │
│                                            │ about {{topic}}.│
│ Include 3 tips.                            │ Include 3 tips. │
│ - Tip 1                                    │ - Tip 1        │
│ - Tip 2                                    │ - Tip 2        │
│ + Tip 3 (new!)                             │                │
│ + CTA: "Reply to book a call"              │                │
└─────────────────────────────────────────────────────────────┘

Color legend

Summary bar

Always visible at top of diff:

Summary: 5 added, 2 removed, 1 changed    [Rollback to this version]

• Added: New words/lines in the newer version
• Removed: Words/lines deleted
• Changed: Words modified in-place (e.g., “friendly” → “professional”)

Click Rollback → current version becomes a copy of the selected version (creates new version entry).

Change classification

Diff viewer classifies changes automatically:

Filter by class using the dropdown: All / Content / Variables / Structure.

Keyboard shortcuts

Variable-aware diffing

PromptAura understands {{variables}}:

• Renaming {{client}} → {{company}} shows as Variable change (not delete + add)
• Adding a variable shows green {{new_var}}
• Changing a default {{tone=friendly}} → {{tone=professional}} shows amber highlight on the default value

Session metadata in history

Each version row shows:

Auto-save vs manual versions

API access

Versions not yet exposed via REST API (roadmap). For now, use the web UI or export session as JSON (includes full version history).