TL;DR: The worst CI failure mode isn't a red build — it's a build that looks like it never existed. You push a tag like `v2. 📖 Reading time: ~35 min What's in this article The Error That Wastes Half Your Afternoon Quick Background: How Dynamic Config Actually Works (and Where It Can Break) Setting Up the Baseline: Your config.yml and continue_config.yml The 'No Workflow' Error: Five Actual Root Causes Debugging Workflow: How to Actually Figure Out What's Wrong The Fix: Working Config for Tag-Triggered Dynamic Pipelines Things the Docs Don't Tell You (But Should) The Error That Wastes Half Your Afternoon The worst CI failure mode isn't a red build — it's a build that looks like it never existed. You push a tag like v2.4.1 , watch the CircleCI dashboard for a few seconds, and see... nothing. Not a failed pipeline. Not a warning. Just the tag sitting there, completely ignored. You refresh. Still nothing.…