Merge Branch Completion Receipt Generator with Empty Branch Detection

How it works

1. 1.Run the Manual Trigger; the sample Code node emits fictional records (normal and invalid)
2. 2.The IF routes records: status='ok' to the true branch, others to the false branch
3. 3.Each branch Code node stamps items with source_branch and handles empty input by returning []
4. 4.The append-mode Merge combines both branch outputs
5. 5.A final Code node builds one receipt with inputCounts, emptyBranches, emptyBranchesCount and totalItemsMerged
6. 6.The final IF checks emptyBranchesCount: zero routes to the complete path, otherwise to the review NoOp

Use cases

• Diagnosing Merge nodes stalling after IF when one branch is always empty
• Documenting per-branch item counts for every execution
• Isolating invalid records into a side branch with a receipt showing how many arrived

Requirements

• An n8n version supporting manualTrigger, code, if, merge, noOp and stickyNote
• No credentials or external connections required

Setup and testing in n8n

1. Import the JSON into n8n and execute the workflow
2. Verify the default receipt (SCENARIO='both') shows branch_true=2, branch_false=1, empty emptyBranches on the complete path
3. Set SCENARIO='emptyFalse' and re-run: a receipt with emptyBranches=['branch_false'] routes to the review path without stalling
4. For real data, replace the sample node with your source; items must carry a string status field

Service Value

Ready-made workflow template for automation delivery and service execution.