Appears to be working

Sources/Downstream/Associations.swift

@@ -6,5 +6,5 @@
 //
 
 struct AssociationsFile: Codable {
-  let associations: [String: String]
+  let associations: [String: [String]]
 }

Sources/Downstream/downstream.yml

@@ -1,2 +1,3 @@
 associations:
-  main.swift: https://github.com/JohnSundell/Files/blob/master/Sources/Files.swift
+  main.swift:
+    - https://github.com/JohnSundell/Files/blob/master/Sources/Files.swift

Sources/Downstream/main.swift

@@ -7,33 +7,38 @@
 
 import Yams
 import Files
-
-let yaml = """
-associations:
-  name: Martin D'vloper
-  job: Developer
-  skill: Elite
-"""
+import Foundation
 
 let decoder = YAMLDecoder()
-let associations = try! decoder.decode(AssociationsFile.self, from: yaml)
-
-//print(associations)
 
 let fileList = CommandLine.arguments[1...]
-let todos = fileList.compactMap { filePath -> String? in
+let todos = fileList.flatMap { filePath -> [String] in
   let changedFile = try! File(path: filePath)
 
+//  print("filePath", filePath)
+//  print("parent", changedFile.parent?.path)
+//  print("yaml", try? changedFile.parent?.file(named: "downstream.yml").read())
+//  let associationsData = (try? changedFile.parent?.file(named: "downstream.yml").read() as? Data).flatMap { try? decoder.decode(AssociationsFile.self, from: $0) }
+//  print("associations", associationsData)
+
   if
     let parent = changedFile.parent,
     let downsteamYML = try? parent.file(named: "downstream.yml").read(),
     let associationsFile = try? decoder.decode(AssociationsFile.self, from: downsteamYML)
   {
-    let fileName = changedFile.path(relativeTo: parent)
-    return associationsFile.associations[fileName]
+    let fileName = changedFile.name
+//    print("relativeFileName", fileName)
+    let newTodos = associationsFile.associations[fileName] ?? []
+    return newTodos.map {
+      "Our records indicate that you may need to update the docs at \($0) because changes were made to  \(fileName)"
+    }
   }
 
-  return nil
+  return []
 }
 
-print(todos)
+if !todos.isEmpty {
+  todos.forEach {
+    print($0)
+  }
+}