diff --git a/.changeset/bounty-program-2026-04-misc-fixes.md b/.changeset/bounty-program-2026-04-misc-fixes.md
new file mode 100644
index 000000000..2aa698936
--- /dev/null
+++ b/.changeset/bounty-program-2026-04-misc-fixes.md
@@ -0,0 +1,5 @@
+---
+"@asyncapi/cli": patch
+---
+
+fix: remove unused retrieveLanguage function, add gleam-template type declaration
diff --git a/src/domains/services/module.d.ts b/src/domains/services/module.d.ts
index cfa82f548..bbc7db3a3 100644
--- a/src/domains/services/module.d.ts
+++ b/src/domains/services/module.d.ts
@@ -1 +1,2 @@
 declare module '@asyncapi/generator';
+declare module '@asyncapi/gleam-template';
diff --git a/src/utils/retrieve-language.ts b/src/utils/retrieve-language.ts
index 641bba7db..8b1378917 100644
--- a/src/utils/retrieve-language.ts
+++ b/src/utils/retrieve-language.ts
@@ -1,6 +1 @@
-export function retrieveLangauge(content: string): 'json' | 'yaml' {
-  if (content.trim()[0] === '{') {
-    return 'json';
-  }
-  return 'yaml';
-}
+