diff --git a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/basic.main.w_compile_tf-aws.md b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/basic.main.w_compile_tf-aws.md
index 0e8b26ed9eb..3257d2bcbc4 100644
--- a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/basic.main.w_compile_tf-aws.md
+++ b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/basic.main.w_compile_tf-aws.md
@@ -2,6 +2,7 @@
 
 ## inflight.$Closure1-1.js
 ```js
+"use strict";
 module.exports = function({ $data, $fs_Util }) {
   class $Closure1 {
     constructor({  }) {
@@ -63,6 +64,7 @@ module.exports = function({ $data, $fs_Util }) {
 
 ## preflight.js
 ```js
+"use strict";
 const $stdlib = require('@winglang/sdk');
 const $plugins = ((s) => !s ? [] : s.split(';'))(process.env.WING_PLUGIN_PATHS);
 const $outdir = process.env.WING_SYNTH_DIR ?? ".";
diff --git a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/json.main.w_compile_tf-aws.md b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/json.main.w_compile_tf-aws.md
index f9ce445abf3..cd568b9efa0 100644
--- a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/json.main.w_compile_tf-aws.md
+++ b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/json.main.w_compile_tf-aws.md
@@ -2,6 +2,7 @@
 
 ## inflight.$Closure1-1.js
 ```js
+"use strict";
 module.exports = function({ $data, $fs_Util, $regex_Util, $std_Json }) {
   class $Closure1 {
     constructor({  }) {
@@ -70,6 +71,7 @@ module.exports = function({ $data, $fs_Util, $regex_Util, $std_Json }) {
 
 ## preflight.js
 ```js
+"use strict";
 const $stdlib = require('@winglang/sdk');
 const $plugins = ((s) => !s ? [] : s.split(';'))(process.env.WING_PLUGIN_PATHS);
 const $outdir = process.env.WING_SYNTH_DIR ?? ".";
diff --git a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/temp_dir.main.w_compile_tf-aws.md b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/temp_dir.main.w_compile_tf-aws.md
index 88766b875f2..41e252bd34a 100644
--- a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/temp_dir.main.w_compile_tf-aws.md
+++ b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/temp_dir.main.w_compile_tf-aws.md
@@ -2,6 +2,7 @@
 
 ## inflight.$Closure1-1.js
 ```js
+"use strict";
 module.exports = function({ $fs_Util }) {
   class $Closure1 {
     constructor({  }) {
@@ -55,6 +56,7 @@ module.exports = function({ $fs_Util }) {
 
 ## preflight.js
 ```js
+"use strict";
 const $stdlib = require('@winglang/sdk');
 const $plugins = ((s) => !s ? [] : s.split(';'))(process.env.WING_PLUGIN_PATHS);
 const $outdir = process.env.WING_SYNTH_DIR ?? ".";
diff --git a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/yaml.main.w_compile_tf-aws.md b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/yaml.main.w_compile_tf-aws.md
index de31463d1ec..319e54cf564 100644
--- a/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/yaml.main.w_compile_tf-aws.md
+++ b/tools/hangar/__snapshots__/test_corpus/sdk_tests/fs/yaml.main.w_compile_tf-aws.md
@@ -2,6 +2,7 @@
 
 ## inflight.$Closure1-1.js
 ```js
+"use strict";
 module.exports = function({ $data, $fs_Util, $std_Json }) {
   class $Closure1 {
     constructor({  }) {
@@ -63,6 +64,7 @@ module.exports = function({ $data, $fs_Util, $std_Json }) {
 
 ## preflight.js
 ```js
+"use strict";
 const $stdlib = require('@winglang/sdk');
 const $plugins = ((s) => !s ? [] : s.split(';'))(process.env.WING_PLUGIN_PATHS);
 const $outdir = process.env.WING_SYNTH_DIR ?? ".";