diff --git a/assets/templates/multienv/bunfig.toml b/assets/templates/multienv/bunfig.toml
new file mode 100644
index 0000000..5669a07
--- /dev/null
+++ b/assets/templates/multienv/bunfig.toml
@@ -0,0 +1,13 @@
+# Bun configuration for tstest
+# This enables TypeScript decorator support in Bun runtime
+
+[build]
+target = "bun"
+
+[test]
+preload = []
+
+# Enable decorators for Bun's TypeScript transpiler
+# This ensures user code with decorators works when executed via Bun
+[transpiler]
+experimentalDecorators = true
diff --git a/assets/templates/multienv/deno.json b/assets/templates/multienv/deno.json
new file mode 100644
index 0000000..7f96d92
--- /dev/null
+++ b/assets/templates/multienv/deno.json
@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "experimentalDecorators": true,
+    "lib": ["ES2022", "DOM"],
+    "target": "ES2022"
+  },
+  "nodeModulesDir": true
+}
diff --git a/changelog.md b/changelog.md
index 7fa51e5..3c5bf32 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 2025-11-17 - 1.21.0 - feat(multienv)
+Add multi-env templates enabling TypeScript decorators for Bun and Deno; rename npmextra config key to szci
+
+- Added assets/templates/multienv/bunfig.toml to enable Bun TypeScript transpiler experimentalDecorators
+- Added assets/templates/multienv/deno.json with experimentalDecorators, lib and target set for ES2022
+- Updated npmextra.json: renamed top-level config key from "npmci" to "szci" (keeps npmGlobalTools, npmAccessLevel and npmRegistryUrl unchanged)
+
 ## 2025-11-06 - 1.20.0 - feat(commit)
 Add non-interactive --yes (-y) flag to commit command to auto-accept AI recommendations and optionally push with -p
 
diff --git a/npmextra.json b/npmextra.json
index 9f4016a..c4c57e2 100644
--- a/npmextra.json
+++ b/npmextra.json
@@ -1,5 +1,5 @@
 {
-  "npmci": {
+  "szci": {
     "npmGlobalTools": [],
     "npmAccessLevel": "private",
     "npmRegistryUrl": "verdaccio.lossless.one"
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index fc86da0..6e076ba 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@git.zone/cli',
-  version: '1.20.0',
+  version: '1.21.0',
   description: 'A comprehensive CLI tool for enhancing and managing local development workflows with gitzone utilities, focusing on project setup, version control, code formatting, and template management.'
 }