diff --git a/README.md b/README.md
index 15e84a45..db200d02 100644
--- a/README.md
+++ b/README.md
@@ -459,7 +459,7 @@ Auto Run supports running multiple documents in sequence:
 2. Click **+ Add Docs** to add more documents to the queue
 3. Drag to reorder documents as needed
 4. Configure options per document:
-   - **Reset on Completion** - Uncheck all boxes when document completes (for repeatable tasks)
+   - **Reset on Completion** - Creates a working copy in `runs/` subfolder instead of modifying the original. The original document is never touched, and working copies (e.g., `TASK-1735192800000-loop-1.md`) serve as audit logs.
    - **Duplicate** - Add the same document multiple times
 5. Enable **Loop Mode** to cycle back to the first document after completing the last
 6. Click **Go** to start the batch run
@@ -490,7 +490,7 @@ Each task executes in a completely fresh AI session with its own unique session
 - **Predictable behavior** - Tasks in looping playbooks execute identically each iteration
 - **Independent execution** - The agent approaches each task without memory of previous work
 
-This isolation is critical for playbooks with `Reset on Completion` documents that loop indefinitely. Without it, the AI might "remember" completing a task and skip re-execution on subsequent loops.
+This isolation is critical for playbooks with `Reset on Completion` documents that loop indefinitely. Each loop creates a fresh working copy from the original document, and the AI approaches it without memory of previous iterations.
 
 ### Environment Variables {#environment-variables}
 
diff --git a/src/renderer/components/AutoRunnerHelpModal.tsx b/src/renderer/components/AutoRunnerHelpModal.tsx
index b5b99fc6..3efaec66 100644
--- a/src/renderer/components/AutoRunnerHelpModal.tsx
+++ b/src/renderer/components/AutoRunnerHelpModal.tsx
@@ -282,13 +282,17 @@ export function AutoRunnerHelpModal({ theme, onClose }: AutoRunnerHelpModalProps
             >
               <p>
                 Enable the reset toggle (<RotateCcw className="w-3 h-3 inline" />) on any document to
-                restore it to its original form after all tasks complete. A backup is created when the
-                document starts, and restored before moving to the next document.
+                keep it available for repeated runs. When enabled, Auto Run creates a <strong style={{ color: theme.colors.textMain }}>working copy</strong> in
+                the <code>runs/</code> subfolder and processes that copy—<em>the original document is never modified</em>.
+              </p>
+              <p>
+                Working copies are named with timestamps (e.g., <code>TASK-1735192800000-loop-1.md</code>) and
+                serve as an audit log of each loop's work. You can delete them manually when no longer needed.
               </p>
               <p>
                 Reset-enabled documents can be duplicated in the queue, allowing the same document to
-                run multiple times in a single batch. If Auto Run is interrupted while processing a
-                reset document, the backup is automatically restored.
+                run multiple times in a single batch. Since originals are untouched, interruptions
+                leave your source documents pristine.
               </p>
             </div>
           </section>