diff --git a/cli/src/shared/skill-name-parser.ts b/cli/src/shared/skill-name-parser.ts
index 575f92fa..98a9a096 100644
--- a/cli/src/shared/skill-name-parser.ts
+++ b/cli/src/shared/skill-name-parser.ts
@@ -24,7 +24,7 @@ function parseSeparatedCoordinate(
   const namespace = skillName.slice(namespaceStart, separatorIndex)
   const slug = skillName.slice(separatorIndex + separatorLength)
 
-  if (!namespace || !slug) {
+  if (!namespace || !slug || slug.includes('/')) {
     throw invalidCoordinate(skillName)
   }
 
diff --git a/cli/test/unit/shared/skill-name-parser.test.ts b/cli/test/unit/shared/skill-name-parser.test.ts
index 19a22c4c..87c56f96 100644
--- a/cli/test/unit/shared/skill-name-parser.test.ts
+++ b/cli/test/unit/shared/skill-name-parser.test.ts
@@ -44,7 +44,10 @@ describe('parseSkillName', () => {
     'team/',
     '/my-skill',
     '--my-skill',
-    'team--'
+    'team--',
+    'team/my-skill/extra',
+    '@team/my-skill/extra',
+    'team--my-skill/extra'
   ])('rejects malformed coordinate %p', (skillName) => {
     expectUsageError(() => parseSkillName(skillName))
   })