diff --git a/.agents/skills/tdfddd-assembly/SKILL.md b/.agents/skills/tdfddd-assembly/SKILL.md
index 8eb44d6..5cd5c0a 100644
--- a/.agents/skills/tdfddd-assembly/SKILL.md
+++ b/.agents/skills/tdfddd-assembly/SKILL.md
@@ -26,6 +26,8 @@ F# is the primary design language and contract artifact for this phase. Assembly
 
 Use TDD during assembly, but only after the design is frozen. The contract from the blueprint determines the test surface.
 
+Follow the skill exactly; do not skip RED→GREEN→REFACTOR, and report each cycle
+
 **Constraints:**
 
 - Read `design/workflows/<bounded-context-slug>/shared-model.fs` when present and `design/workflows/<bounded-context-slug>/<workflow-slug>/04-blueprint.fs` as input.