Actual deterministic evidence
Missing Handle header in update mode
The update file has no recognized Handle header. Update matching needs a product identity field.
Minimal synthetic input
Title,Price
Missing Handle,10.00
Actual Q-Surface result
| Issue code | Severity | Message | Row | Field |
|---|---|---|---|---|
MISSING_REQUIRED_HEADER_HANDLE | critical | Update mode requires a recognized Handle / URL handle header. | — | handle |
Repair, unresolved work, and rerun
No deterministic safe fix changed this CSV; edit the original sample manually.
MISSING_REQUIRED_HEADER_HANDLE: Add URL handle or Handle before updating existing products.
Next: Add URL handle or Handle before updating existing products. Rerun the edited CSV through Q-Surface before attempting import.
Processing boundary and limitations
Your CSV is processed in your browser. No Shopify login. No store connection. No CSV storage.
- This evidence covers Q-Surface update mode, not every Shopify update workflow.
- Q-Surface does not guarantee Shopify import success and is not affiliated with Shopify.
Source classification: shopify_docs. Represented Q-Surface version: 0.7.31.
Related evidence
Try the evidence, then check your own file
Check my own CSV with this mode and source context
The synthetic result demonstrates this public case only. It does not imply that your own CSV has the same defect. The founding passage is self-serve, browser-local, and requires no contact or file sharing.