diff --git a/src/MetaManifold.jl b/src/MetaManifold.jl
index c2681b5..150f25b 100644
--- a/src/MetaManifold.jl
+++ b/src/MetaManifold.jl
@@ -44,6 +44,10 @@ include("canonical.jl")
 include("analysis/clade_cumulus.jl")
 include("analysis/diversity.jl")
 include("analysis/analysis.jl")
+# CompositionalModels precedes Differential: differential.jl imports
+# CompositionalFit, CompositionalRefusal and RuntimeRefusal from it. It is
+# included once, as is clade_cumulus.jl above; repeating a module include
+# silently redefines the module instead of reusing it.
 include("analysis/compositional.jl")
 include("analysis/differential.jl")
 # Opt-in validated descriptive statistics (issue #1). Ordinary workflows above