Every one of these automation bugs showed "Success". Here’s the checklist I use now.

Description and use

Automation workflows can report success while silently producing no output or incorrect data. In Blinkbox, six common silent failure patterns were identified and mitigated by adding assertions that verify each node’s output, ensuring reliable operation.

Problem

Automation workflows can report success while silently producing no output or incorrect data, leading to wasted effort and data loss.

Outcome

After applying the checklist and assertions, the pipeline correctly wrote 3 leads on the first run and 0 on subsequent runs due to dedupe, demonstrating reliable operation.

Workflow

• 1. Build pipeline with 16 nodes (cron → HTTP → merge → qualify → Google Sheets read → filter → append).
• 2. Observe green execution status but empty output.
• 3. Dump node inputs to a scratch spreadsheet to identify failure classes.
• 4. Create a checklist of six common silent failure patterns.
• 5. Add assertions to each pipeline to verify output counts and data integrity.
• 6. Rebuild pipeline with corrected logic and run tests.
• 7. Deploy pipeline on cron schedule.
• 8. Monitor logs and output for failures.

Evidence

The pipeline "succeeded" on every run and the sheet stayed empty, and nothing in the logs said otherwise.

Source

Add assertions to each pipeline to verify output counts and data integrity.

Source