diff --git a/nightly/book/01_introduction.html b/nightly/book/01_introduction.html
index bec8d786..1046c1d7 100644
--- a/nightly/book/01_introduction.html
+++ b/nightly/book/01_introduction.html
@@ -308,7 +308,7 @@ <h2 id="productivity"><a class="header" href="#productivity">Productivity</a></h
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/02_features.html b/nightly/book/02_features.html
index 1f929c79..963989df 100644
--- a/nightly/book/02_features.html
+++ b/nightly/book/02_features.html
@@ -730,7 +730,7 @@ <h2 id="visibility-control"><a class="header" href="#visibility-control">Visibil
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
         </script>
diff --git a/nightly/book/03_getting_started.html b/nightly/book/03_getting_started.html
index ee1975be..c64cc3b1 100644
--- a/nightly/book/03_getting_started.html
+++ b/nightly/book/03_getting_started.html
@@ -302,7 +302,7 @@ <h1 id="getting-started"><a class="header" href="#getting-started">Getting Start
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/03_getting_started/01_installation.html b/nightly/book/03_getting_started/01_installation.html
index 0fb79ca7..407b839a 100644
--- a/nightly/book/03_getting_started/01_installation.html
+++ b/nightly/book/03_getting_started/01_installation.html
@@ -326,7 +326,7 @@ <h3 id="other-editors"><a class="header" href="#other-editors">Other Editors</a>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/03_getting_started/02_hello_world.html b/nightly/book/03_getting_started/02_hello_world.html
index 1d840383..c5716b1d 100644
--- a/nightly/book/03_getting_started/02_hello_world.html
+++ b/nightly/book/03_getting_started/02_hello_world.html
@@ -373,7 +373,7 @@ <h2 id="build-code"><a class="header" href="#build-code">Build Code</a></h2>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/04_code_examples.html b/nightly/book/04_code_examples.html
index af946a4b..41bc27e0 100644
--- a/nightly/book/04_code_examples.html
+++ b/nightly/book/04_code_examples.html
@@ -319,7 +319,7 @@ <h1 id="code-examples"><a class="header" href="#code-examples">Code Examples</a>
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/04_code_examples/01_module.html b/nightly/book/04_code_examples/01_module.html
index 4237a9b4..d67321c7 100644
--- a/nightly/book/04_code_examples/01_module.html
+++ b/nightly/book/04_code_examples/01_module.html
@@ -346,7 +346,7 @@ <h1 id="module"><a class="header" href="#module">Module</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/04_code_examples/02_instantiation.html b/nightly/book/04_code_examples/02_instantiation.html
index ec573748..f9dd7b52 100644
--- a/nightly/book/04_code_examples/02_instantiation.html
+++ b/nightly/book/04_code_examples/02_instantiation.html
@@ -346,7 +346,7 @@ <h1 id="instantiation"><a class="header" href="#instantiation">Instantiation</a>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/04_code_examples/03_interface.html b/nightly/book/04_code_examples/03_interface.html
index 24d8d179..c9ad6df3 100644
--- a/nightly/book/04_code_examples/03_interface.html
+++ b/nightly/book/04_code_examples/03_interface.html
@@ -337,7 +337,7 @@ <h1 id="interface"><a class="header" href="#interface">Interface</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/04_code_examples/04_package.html b/nightly/book/04_code_examples/04_package.html
index 95dddcba..2ccadb4b 100644
--- a/nightly/book/04_code_examples/04_package.html
+++ b/nightly/book/04_code_examples/04_package.html
@@ -318,7 +318,7 @@ <h1 id="package"><a class="header" href="#package">Package</a></h1>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference.html b/nightly/book/05_language_reference.html
index 28872450..0f2c73e8 100644
--- a/nightly/book/05_language_reference.html
+++ b/nightly/book/05_language_reference.html
@@ -302,7 +302,7 @@ <h1 id="language-reference"><a class="header" href="#language-reference">Languag
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/01_source_code_structure.html b/nightly/book/05_language_reference/01_source_code_structure.html
index 7b764ed0..107519bf 100644
--- a/nightly/book/05_language_reference/01_source_code_structure.html
+++ b/nightly/book/05_language_reference/01_source_code_structure.html
@@ -313,7 +313,7 @@ <h1 id="source-code-structure"><a class="header" href="#source-code-structure">S
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/02_lexical_structure.html b/nightly/book/05_language_reference/02_lexical_structure.html
index 37f8b9c9..18ca173e 100644
--- a/nightly/book/05_language_reference/02_lexical_structure.html
+++ b/nightly/book/05_language_reference/02_lexical_structure.html
@@ -339,7 +339,7 @@ <h2 id="string"><a class="header" href="#string">String</a></h2>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/02_lexical_structure/01_operator.html b/nightly/book/05_language_reference/02_lexical_structure/01_operator.html
index 6f3dd8c7..f4099b5f 100644
--- a/nightly/book/05_language_reference/02_lexical_structure/01_operator.html
+++ b/nightly/book/05_language_reference/02_lexical_structure/01_operator.html
@@ -361,7 +361,7 @@ <h1 id="operator"><a class="header" href="#operator">Operator</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/05_language_reference/02_lexical_structure/02_number.html b/nightly/book/05_language_reference/02_lexical_structure/02_number.html
index 5e8d9666..38402b62 100644
--- a/nightly/book/05_language_reference/02_lexical_structure/02_number.html
+++ b/nightly/book/05_language_reference/02_lexical_structure/02_number.html
@@ -365,7 +365,7 @@ <h2 id="floating-point"><a class="header" href="#floating-point">Floating point<
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/02_lexical_structure/03_array_literal.html b/nightly/book/05_language_reference/02_lexical_structure/03_array_literal.html
index d82290e5..a3a3b52a 100644
--- a/nightly/book/05_language_reference/02_lexical_structure/03_array_literal.html
+++ b/nightly/book/05_language_reference/02_lexical_structure/03_array_literal.html
@@ -309,7 +309,7 @@ <h1 id="array-literal"><a class="header" href="#array-literal">Array Literal</a>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/03_data_type.html b/nightly/book/05_language_reference/03_data_type.html
index 27369a4f..6323fac1 100644
--- a/nightly/book/05_language_reference/03_data_type.html
+++ b/nightly/book/05_language_reference/03_data_type.html
@@ -302,7 +302,7 @@ <h1 id="data-type"><a class="header" href="#data-type">Data Type</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/03_data_type/01_builtin_type.html b/nightly/book/05_language_reference/03_data_type/01_builtin_type.html
index 2bdbe94e..8166b76f 100644
--- a/nightly/book/05_language_reference/03_data_type/01_builtin_type.html
+++ b/nightly/book/05_language_reference/03_data_type/01_builtin_type.html
@@ -363,7 +363,7 @@ <h2 id="type-type"><a class="header" href="#type-type">Type type</a></h2>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/03_data_type/02_user_defined_type.html b/nightly/book/05_language_reference/03_data_type/02_user_defined_type.html
index f99e1f12..549d69fe 100644
--- a/nightly/book/05_language_reference/03_data_type/02_user_defined_type.html
+++ b/nightly/book/05_language_reference/03_data_type/02_user_defined_type.html
@@ -359,7 +359,7 @@ <h2 id="typedef"><a class="header" href="#typedef">Typedef</a></h2>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/03_data_type/03_array.html b/nightly/book/05_language_reference/03_data_type/03_array.html
index 33305b68..89283751 100644
--- a/nightly/book/05_language_reference/03_data_type/03_array.html
+++ b/nightly/book/05_language_reference/03_data_type/03_array.html
@@ -346,7 +346,7 @@ <h1 id="array"><a class="header" href="#array">Array</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/03_data_type/04_clock_reset.html b/nightly/book/05_language_reference/03_data_type/04_clock_reset.html
index a8a0cf19..0c8893cb 100644
--- a/nightly/book/05_language_reference/03_data_type/04_clock_reset.html
+++ b/nightly/book/05_language_reference/03_data_type/04_clock_reset.html
@@ -357,7 +357,7 @@ <h1 id="clock--reset"><a class="header" href="#clock--reset">Clock / Reset</a></
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression.html b/nightly/book/05_language_reference/04_expression.html
index 28d1eae9..60dfa8d7 100644
--- a/nightly/book/05_language_reference/04_expression.html
+++ b/nightly/book/05_language_reference/04_expression.html
@@ -304,7 +304,7 @@ <h1 id="expression"><a class="header" href="#expression">Expression</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/01_operator_precedence.html b/nightly/book/05_language_reference/04_expression/01_operator_precedence.html
index 44d17551..79f20b92 100644
--- a/nightly/book/05_language_reference/04_expression/01_operator_precedence.html
+++ b/nightly/book/05_language_reference/04_expression/01_operator_precedence.html
@@ -319,7 +319,7 @@ <h1 id="operator-precedence"><a class="header" href="#operator-precedence">Opera
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/02_function_call.html b/nightly/book/05_language_reference/04_expression/02_function_call.html
index 35c50102..087010e2 100644
--- a/nightly/book/05_language_reference/04_expression/02_function_call.html
+++ b/nightly/book/05_language_reference/04_expression/02_function_call.html
@@ -315,7 +315,7 @@ <h1 id="function-call"><a class="header" href="#function-call">Function Call</a>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/05_language_reference/04_expression/03_concatenation.html b/nightly/book/05_language_reference/04_expression/03_concatenation.html
index 4bdf2f8e..2f39c14d 100644
--- a/nightly/book/05_language_reference/04_expression/03_concatenation.html
+++ b/nightly/book/05_language_reference/04_expression/03_concatenation.html
@@ -310,7 +310,7 @@ <h1 id="concatenation"><a class="header" href="#concatenation">Concatenation</a>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/04_if.html b/nightly/book/05_language_reference/04_expression/04_if.html
index 02381741..48cd7e87 100644
--- a/nightly/book/05_language_reference/04_expression/04_if.html
+++ b/nightly/book/05_language_reference/04_expression/04_if.html
@@ -318,7 +318,7 @@ <h1 id="if"><a class="header" href="#if">If</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/05_case.html b/nightly/book/05_language_reference/04_expression/05_case.html
index f0a92368..248d4860 100644
--- a/nightly/book/05_language_reference/04_expression/05_case.html
+++ b/nightly/book/05_language_reference/04_expression/05_case.html
@@ -320,7 +320,7 @@ <h1 id="case"><a class="header" href="#case">Case</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/06_bit_select.html b/nightly/book/05_language_reference/04_expression/06_bit_select.html
index b51cdbb1..05dbf4de 100644
--- a/nightly/book/05_language_reference/04_expression/06_bit_select.html
+++ b/nightly/book/05_language_reference/04_expression/06_bit_select.html
@@ -313,7 +313,7 @@ <h1 id="bit-select"><a class="header" href="#bit-select">Bit Select</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/05_language_reference/04_expression/07_range.html b/nightly/book/05_language_reference/04_expression/07_range.html
index cb9f7090..72c6646f 100644
--- a/nightly/book/05_language_reference/04_expression/07_range.html
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         <script src="../../book.js"></script>
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index a2365ee0..c1a32261 100644
--- a/nightly/book/05_language_reference/04_expression/08_msb_lsb.html
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index fd351d1a..e43f73b9 100644
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index c318f059..c07265c1 100644
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         <script src="../book.js"></script>
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 2250ae76..1f3a223f 100644
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index fb9b3a27..2bf07407 100644
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index d5cff3a2..b3452842 100644
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@@ -318,7 +318,7 @@ <h1 id="if"><a class="header" href="#if">If</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 23aa76e9..f3c8fe7b 100644
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 635bdc17..f5aede3b 100644
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@@ -319,7 +319,7 @@ <h1 id="for"><a class="header" href="#for">For</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index a15c947a..a706bb97 100644
--- a/nightly/book/05_language_reference/05_statement/06_return.html
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@@ -309,7 +309,7 @@ <h1 id="return"><a class="header" href="#return">Return</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 4aa2eeee..999f6be0 100644
--- a/nightly/book/05_language_reference/05_statement/07_let.html
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@@ -325,7 +325,7 @@ <h1 id="let"><a class="header" href="#let">Let</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 63a83c37..1b444c8e 100644
--- a/nightly/book/05_language_reference/06_declaration.html
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@@ -302,7 +302,7 @@ <h1 id="declaration"><a class="header" href="#declaration">Declaration</a></h1>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 437b99c8..16e2c562 100644
--- a/nightly/book/05_language_reference/06_declaration/01_variable.html
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@@ -319,7 +319,7 @@ <h1 id="variable"><a class="header" href="#variable">Variable</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 68b96b25..8fb7e575 100644
--- a/nightly/book/05_language_reference/06_declaration/02_parameter.html
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@@ -310,7 +310,7 @@ <h1 id="parameter"><a class="header" href="#parameter">Parameter</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index 1960cff1..36973a6d 100644
--- a/nightly/book/05_language_reference/06_declaration/03_register.html
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@@ -331,7 +331,7 @@ <h1 id="register"><a class="header" href="#register">Register</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 09288966..677d05b9 100644
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@@ -311,7 +311,7 @@ <h1 id="combinational"><a class="header" href="#combinational">Combinational</a>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index 77ddc80b..a7658d31 100644
--- a/nightly/book/05_language_reference/06_declaration/05_assign.html
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@@ -308,7 +308,7 @@ <h1 id="assign"><a class="header" href="#assign">Assign</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 5ba2f2ac..b5eef682 100644
--- a/nightly/book/05_language_reference/06_declaration/06_function.html
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@@ -325,7 +325,7 @@ <h1 id="function"><a class="header" href="#function">Function</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/05_language_reference/06_declaration/07_initial_final.html b/nightly/book/05_language_reference/06_declaration/07_initial_final.html
index c2265824..08694fdb 100644
--- a/nightly/book/05_language_reference/06_declaration/07_initial_final.html
+++ b/nightly/book/05_language_reference/06_declaration/07_initial_final.html
@@ -314,7 +314,7 @@ <h1 id="initial--final"><a class="header" href="#initial--final">Initial / Final
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index d0e44af1..40bbe98e 100644
--- a/nightly/book/05_language_reference/06_declaration/08_attribute.html
+++ b/nightly/book/05_language_reference/06_declaration/08_attribute.html
@@ -312,7 +312,7 @@ <h2 id="sv-attribute"><a class="header" href="#sv-attribute">SV Attribute</a></h
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index c464a3b5..3036ccb2 100644
--- a/nightly/book/05_language_reference/06_declaration/09_generate.html
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@@ -315,7 +315,7 @@ <h1 id="generate"><a class="header" href="#generate">Generate</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index 4f782117..5ecccf19 100644
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@@ -328,7 +328,7 @@ <h1 id="instantiation"><a class="header" href="#instantiation">Instantiation</a>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/05_language_reference/06_declaration/11_named_block.html b/nightly/book/05_language_reference/06_declaration/11_named_block.html
index 535428c5..d0d68cd0 100644
--- a/nightly/book/05_language_reference/06_declaration/11_named_block.html
+++ b/nightly/book/05_language_reference/06_declaration/11_named_block.html
@@ -313,7 +313,7 @@ <h1 id="named-block"><a class="header" href="#named-block">Named Block</a></h1>
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         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/05_language_reference/06_declaration/12_import_export.html b/nightly/book/05_language_reference/06_declaration/12_import_export.html
index db0c4eb7..9ca5cb46 100644
--- a/nightly/book/05_language_reference/06_declaration/12_import_export.html
+++ b/nightly/book/05_language_reference/06_declaration/12_import_export.html
@@ -332,7 +332,7 @@ <h1 id="import--export"><a class="header" href="#import--export">Import / Export
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
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diff --git a/nightly/book/05_language_reference/07_module.html b/nightly/book/05_language_reference/07_module.html
index 73fec598..37e2c296 100644
--- a/nightly/book/05_language_reference/07_module.html
+++ b/nightly/book/05_language_reference/07_module.html
@@ -333,7 +333,7 @@ <h1 id="module"><a class="header" href="#module">Module</a></h1>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/05_language_reference/08_interface.html b/nightly/book/05_language_reference/08_interface.html
index 96a047af..7734b6b9 100644
--- a/nightly/book/05_language_reference/08_interface.html
+++ b/nightly/book/05_language_reference/08_interface.html
@@ -324,7 +324,7 @@ <h1 id="interface"><a class="header" href="#interface">Interface</a></h1>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/05_language_reference/09_package.html b/nightly/book/05_language_reference/09_package.html
index e47ea31f..13003feb 100644
--- a/nightly/book/05_language_reference/09_package.html
+++ b/nightly/book/05_language_reference/09_package.html
@@ -308,7 +308,7 @@ <h1 id="package"><a class="header" href="#package">Package</a></h1>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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index 1d2368ef..f6e49764 100644
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+++ b/nightly/book/05_language_reference/10_systemverilog_interoperation.html
@@ -311,7 +311,7 @@ <h1 id="systemverilog-interoperation"><a class="header" href="#systemverilog-int
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/05_language_reference/11_visibility.html b/nightly/book/05_language_reference/11_visibility.html
index dcfefae7..4ae6b8e2 100644
--- a/nightly/book/05_language_reference/11_visibility.html
+++ b/nightly/book/05_language_reference/11_visibility.html
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index 2d68aac8..8cd3f8fb 100644
--- a/nightly/book/05_language_reference/12_foreign_language_integration.html
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@@ -323,7 +323,7 @@ <h2 id="include-declaration"><a class="header" href="#include-declaration"><code
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index 1e1b9715..66c957ac 100644
--- a/nightly/book/05_language_reference/13_integrated_test.html
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 4eabbd19..90bae754 100644
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@@ -374,7 +374,7 @@ <h2 id="generic-struct"><a class="header" href="#generic-struct">Generic Struct<
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         <script src="../book.js"></script>
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diff --git a/nightly/book/06_development_environment.html b/nightly/book/06_development_environment.html
index fe36b305..c8dd7df6 100644
--- a/nightly/book/06_development_environment.html
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         <script src="book.js"></script>
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index f4ba031f..527ade99 100644
--- a/nightly/book/06_development_environment/01_project_configuration.html
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index 1c4fbe46..4a42df34 100644
--- a/nightly/book/06_development_environment/02_dependencies.html
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 82d8fe6d..77a5587b 100644
--- a/nightly/book/06_development_environment/03_publish_project.html
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         <script src="../book.js"></script>
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-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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index 0f7df0eb..ecdca4d4 100644
--- a/nightly/book/06_development_environment/04_directory_layout.html
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diff --git a/nightly/book/06_development_environment/05_formatter.html b/nightly/book/06_development_environment/05_formatter.html
index f810c450..22805383 100644
--- a/nightly/book/06_development_environment/05_formatter.html
+++ b/nightly/book/06_development_environment/05_formatter.html
@@ -311,7 +311,7 @@ <h1 id="formatter"><a class="header" href="#formatter">Formatter</a></h1>
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         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/06_development_environment/06_linter.html b/nightly/book/06_development_environment/06_linter.html
index 56512861..d28f18a8 100644
--- a/nightly/book/06_development_environment/06_linter.html
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@@ -391,7 +391,7 @@ <h2 id="the-lintnaming-section"><a class="header" href="#the-lintnaming-section"
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         <script type="module">
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diff --git a/nightly/book/06_development_environment/07_simulator.html b/nightly/book/06_development_environment/07_simulator.html
index 5071b9fb..eb9080dd 100644
--- a/nightly/book/06_development_environment/07_simulator.html
+++ b/nightly/book/06_development_environment/07_simulator.html
@@ -350,7 +350,7 @@ <h2 id="the-testvivado-section"><a class="header" href="#the-testvivado-section"
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/06_development_environment/08_language_server.html b/nightly/book/06_development_environment/08_language_server.html
index 487ee580..d64d31f5 100644
--- a/nightly/book/06_development_environment/08_language_server.html
+++ b/nightly/book/06_development_environment/08_language_server.html
@@ -308,7 +308,7 @@ <h1 id="language-server"><a class="header" href="#language-server">Language Serv
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/06_development_environment/09_compatibility.html b/nightly/book/06_development_environment/09_compatibility.html
index 655b4b62..3d7b8f6f 100644
--- a/nightly/book/06_development_environment/09_compatibility.html
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@@ -315,7 +315,7 @@ <h3 id="string-parameter"><a class="header" href="#string-parameter">String para
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/06_development_environment/10_documentation.html b/nightly/book/06_development_environment/10_documentation.html
index e8e7ac62..fac1f607 100644
--- a/nightly/book/06_development_environment/10_documentation.html
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@@ -344,7 +344,7 @@ <h1 id="documentation"><a class="header" href="#documentation">Documentation</a>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/06_development_environment/11_github_action.html b/nightly/book/06_development_environment/11_github_action.html
index d6d4c39e..2e1bb913 100644
--- a/nightly/book/06_development_environment/11_github_action.html
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@@ -350,7 +350,7 @@ <h1 id="github-action"><a class="header" href="#github-action">GitHub Action</a>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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             window.build = build;
         </script>
diff --git a/nightly/book/07_appendix.html b/nightly/book/07_appendix.html
index 05e794cd..96aa2d70 100644
--- a/nightly/book/07_appendix.html
+++ b/nightly/book/07_appendix.html
@@ -301,7 +301,7 @@ <h1 id="appendix"><a class="header" href="#appendix">Appendix</a></h1>
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/07_appendix/01_formal_syntax.html b/nightly/book/07_appendix/01_formal_syntax.html
index 7942a2e6..1cb7659b 100644
--- a/nightly/book/07_appendix/01_formal_syntax.html
+++ b/nightly/book/07_appendix/01_formal_syntax.html
@@ -1133,7 +1133,7 @@ <h1 id="formal-syntax"><a class="header" href="#formal-syntax">Formal Syntax</a>
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/07_appendix/02_semantic_error.html b/nightly/book/07_appendix/02_semantic_error.html
index 55c2403d..faa6f807 100644
--- a/nightly/book/07_appendix/02_semantic_error.html
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@@ -320,7 +320,7 @@ <h2 id="unused_variable"><a class="header" href="#unused_variable">unused_variab
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/404.html b/nightly/book/404.html
index 43e8d5d8..2bdcb4fc 100644
--- a/nightly/book/404.html
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@@ -291,7 +291,7 @@ <h1 id="document-not-found-404"><a class="header" href="#document-not-found-404"
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/index.html b/nightly/book/index.html
index dd27c37f..90e005c2 100644
--- a/nightly/book/index.html
+++ b/nightly/book/index.html
@@ -308,7 +308,7 @@ <h2 id="productivity"><a class="header" href="#productivity">Productivity</a></h
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/01_introduction.html b/nightly/book/ja/01_introduction.html
index b4754c16..ea71eeb9 100644
--- a/nightly/book/ja/01_introduction.html
+++ b/nightly/book/ja/01_introduction.html
@@ -304,7 +304,7 @@ <h2 id="生産性"><a class="header" href="#生産性">生産性</a></h2>
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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             window.build = build;
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diff --git a/nightly/book/ja/02_features.html b/nightly/book/ja/02_features.html
index c463227f..36469bb3 100644
--- a/nightly/book/ja/02_features.html
+++ b/nightly/book/ja/02_features.html
@@ -711,7 +711,7 @@ <h2 id="visibility-control"><a class="header" href="#visibility-control">可視
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/03_getting_started.html b/nightly/book/ja/03_getting_started.html
index def41aa5..55a776d1 100644
--- a/nightly/book/ja/03_getting_started.html
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@@ -302,7 +302,7 @@ <h1 id="はじめに"><a class="header" href="#はじめに">はじめに</a></h
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/03_getting_started/01_installation.html b/nightly/book/ja/03_getting_started/01_installation.html
index 4548f95b..92352f15 100644
--- a/nightly/book/ja/03_getting_started/01_installation.html
+++ b/nightly/book/ja/03_getting_started/01_installation.html
@@ -321,7 +321,7 @@ <h3 id="そのほかのエディタ"><a class="header" href="#そのほかのエ
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/03_getting_started/02_hello_world.html b/nightly/book/ja/03_getting_started/02_hello_world.html
index 6421ee18..748d76eb 100644
--- a/nightly/book/ja/03_getting_started/02_hello_world.html
+++ b/nightly/book/ja/03_getting_started/02_hello_world.html
@@ -367,7 +367,7 @@ <h2 id="ビルドする"><a class="header" href="#ビルドする">ビルドす
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/04_code_examples.html b/nightly/book/ja/04_code_examples.html
index f399f2d9..e2e02de6 100644
--- a/nightly/book/ja/04_code_examples.html
+++ b/nightly/book/ja/04_code_examples.html
@@ -316,7 +316,7 @@ <h1 id="コード例"><a class="header" href="#コード例">コード例</a></h
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         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/04_code_examples/01_module.html b/nightly/book/ja/04_code_examples/01_module.html
index cae652b0..49ba7116 100644
--- a/nightly/book/ja/04_code_examples/01_module.html
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@@ -346,7 +346,7 @@ <h1 id="モジュール"><a class="header" href="#モジュール">モジュー
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/04_code_examples/02_instantiation.html b/nightly/book/ja/04_code_examples/02_instantiation.html
index 0f0bef51..5fef5d66 100644
--- a/nightly/book/ja/04_code_examples/02_instantiation.html
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@@ -346,7 +346,7 @@ <h1 id="インスタンス"><a class="header" href="#インスタンス">イン
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
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diff --git a/nightly/book/ja/04_code_examples/03_interface.html b/nightly/book/ja/04_code_examples/03_interface.html
index 9a1e5c60..13a367cc 100644
--- a/nightly/book/ja/04_code_examples/03_interface.html
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@@ -337,7 +337,7 @@ <h1 id="インターフェース"><a class="header" href="#インターフェー
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         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/04_code_examples/04_package.html b/nightly/book/ja/04_code_examples/04_package.html
index 87dad604..1e743d3a 100644
--- a/nightly/book/ja/04_code_examples/04_package.html
+++ b/nightly/book/ja/04_code_examples/04_package.html
@@ -318,7 +318,7 @@ <h1 id="パッケージ"><a class="header" href="#パッケージ">パッケー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference.html b/nightly/book/ja/05_language_reference.html
index 49614dbd..4af395da 100644
--- a/nightly/book/ja/05_language_reference.html
+++ b/nightly/book/ja/05_language_reference.html
@@ -302,7 +302,7 @@ <h1 id="言語リファレンス"><a class="header" href="#言語リファレン
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/01_source_code_structure.html b/nightly/book/ja/05_language_reference/01_source_code_structure.html
index 4d3ad642..d4cdcc8e 100644
--- a/nightly/book/ja/05_language_reference/01_source_code_structure.html
+++ b/nightly/book/ja/05_language_reference/01_source_code_structure.html
@@ -311,7 +311,7 @@ <h1 id="ソースコードの構造"><a class="header" href="#ソースコード
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/02_lexical_structure.html b/nightly/book/ja/05_language_reference/02_lexical_structure.html
index 37bf570f..a2279031 100644
--- a/nightly/book/ja/05_language_reference/02_lexical_structure.html
+++ b/nightly/book/ja/05_language_reference/02_lexical_structure.html
@@ -332,7 +332,7 @@ <h2 id="文字列"><a class="header" href="#文字列">文字列</a></h2>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/02_lexical_structure/01_operator.html b/nightly/book/ja/05_language_reference/02_lexical_structure/01_operator.html
index 683ccc02..9d0d231d 100644
--- a/nightly/book/ja/05_language_reference/02_lexical_structure/01_operator.html
+++ b/nightly/book/ja/05_language_reference/02_lexical_structure/01_operator.html
@@ -360,7 +360,7 @@ <h1 id="演算子"><a class="header" href="#演算子">演算子</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/02_lexical_structure/02_number.html b/nightly/book/ja/05_language_reference/02_lexical_structure/02_number.html
index 1b4e7f93..8c36a3c7 100644
--- a/nightly/book/ja/05_language_reference/02_lexical_structure/02_number.html
+++ b/nightly/book/ja/05_language_reference/02_lexical_structure/02_number.html
@@ -364,7 +364,7 @@ <h2 id="浮動小数点数"><a class="header" href="#浮動小数点数">浮動
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/02_lexical_structure/03_array_literal.html b/nightly/book/ja/05_language_reference/02_lexical_structure/03_array_literal.html
index 9dfc47f7..1febbc65 100644
--- a/nightly/book/ja/05_language_reference/02_lexical_structure/03_array_literal.html
+++ b/nightly/book/ja/05_language_reference/02_lexical_structure/03_array_literal.html
@@ -308,7 +308,7 @@ <h1 id="配列リテラル"><a class="header" href="#配列リテラル">配列
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/03_data_type.html b/nightly/book/ja/05_language_reference/03_data_type.html
index 2c8eaf72..8e9fc11a 100644
--- a/nightly/book/ja/05_language_reference/03_data_type.html
+++ b/nightly/book/ja/05_language_reference/03_data_type.html
@@ -302,7 +302,7 @@ <h1 id="データ型"><a class="header" href="#データ型">データ型</a></h
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/03_data_type/01_builtin_type.html b/nightly/book/ja/05_language_reference/03_data_type/01_builtin_type.html
index 376b795b..353d53e7 100644
--- a/nightly/book/ja/05_language_reference/03_data_type/01_builtin_type.html
+++ b/nightly/book/ja/05_language_reference/03_data_type/01_builtin_type.html
@@ -358,7 +358,7 @@ <h2 id="type型"><a class="header" href="#type型">Type型</a></h2>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/03_data_type/02_user_defined_type.html b/nightly/book/ja/05_language_reference/03_data_type/02_user_defined_type.html
index 1f2f1343..e50d9edb 100644
--- a/nightly/book/ja/05_language_reference/03_data_type/02_user_defined_type.html
+++ b/nightly/book/ja/05_language_reference/03_data_type/02_user_defined_type.html
@@ -352,7 +352,7 @@ <h2 id="型定義"><a class="header" href="#型定義">型定義</a></h2>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/03_data_type/03_array.html b/nightly/book/ja/05_language_reference/03_data_type/03_array.html
index 0096af17..d261f2f2 100644
--- a/nightly/book/ja/05_language_reference/03_data_type/03_array.html
+++ b/nightly/book/ja/05_language_reference/03_data_type/03_array.html
@@ -345,7 +345,7 @@ <h1 id="配列"><a class="header" href="#配列">配列</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/03_data_type/04_clock_reset.html b/nightly/book/ja/05_language_reference/03_data_type/04_clock_reset.html
index 3271a125..7989674e 100644
--- a/nightly/book/ja/05_language_reference/03_data_type/04_clock_reset.html
+++ b/nightly/book/ja/05_language_reference/03_data_type/04_clock_reset.html
@@ -355,7 +355,7 @@ <h1 id="クロックとリセット"><a class="header" href="#クロックとリ
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression.html b/nightly/book/ja/05_language_reference/04_expression.html
index 00d472c5..6b54456a 100644
--- a/nightly/book/ja/05_language_reference/04_expression.html
+++ b/nightly/book/ja/05_language_reference/04_expression.html
@@ -302,7 +302,7 @@ <h1 id="式"><a class="header" href="#式">式</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/01_operator_precedence.html b/nightly/book/ja/05_language_reference/04_expression/01_operator_precedence.html
index f95f8f9d..fd793e92 100644
--- a/nightly/book/ja/05_language_reference/04_expression/01_operator_precedence.html
+++ b/nightly/book/ja/05_language_reference/04_expression/01_operator_precedence.html
@@ -321,7 +321,7 @@ <h1 id="演算子の優先順位"><a class="header" href="#演算子の優先順
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/02_function_call.html b/nightly/book/ja/05_language_reference/04_expression/02_function_call.html
index 5b3a9239..fbf22acf 100644
--- a/nightly/book/ja/05_language_reference/04_expression/02_function_call.html
+++ b/nightly/book/ja/05_language_reference/04_expression/02_function_call.html
@@ -314,7 +314,7 @@ <h1 id="関数呼び出し"><a class="header" href="#関数呼び出し">関数
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/03_concatenation.html b/nightly/book/ja/05_language_reference/04_expression/03_concatenation.html
index 11fe2314..78991f7e 100644
--- a/nightly/book/ja/05_language_reference/04_expression/03_concatenation.html
+++ b/nightly/book/ja/05_language_reference/04_expression/03_concatenation.html
@@ -309,7 +309,7 @@ <h1 id="連結"><a class="header" href="#連結">連結</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/04_if.html b/nightly/book/ja/05_language_reference/04_expression/04_if.html
index 6a2d66ef..e03abdd4 100644
--- a/nightly/book/ja/05_language_reference/04_expression/04_if.html
+++ b/nightly/book/ja/05_language_reference/04_expression/04_if.html
@@ -315,7 +315,7 @@ <h1 id="if"><a class="header" href="#if">if</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/05_case.html b/nightly/book/ja/05_language_reference/04_expression/05_case.html
index b3a805cc..c1aaf162 100644
--- a/nightly/book/ja/05_language_reference/04_expression/05_case.html
+++ b/nightly/book/ja/05_language_reference/04_expression/05_case.html
@@ -315,7 +315,7 @@ <h1 id="case"><a class="header" href="#case">case</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/06_bit_select.html b/nightly/book/ja/05_language_reference/04_expression/06_bit_select.html
index 28a77fce..91ebb395 100644
--- a/nightly/book/ja/05_language_reference/04_expression/06_bit_select.html
+++ b/nightly/book/ja/05_language_reference/04_expression/06_bit_select.html
@@ -311,7 +311,7 @@ <h1 id="ビット選択"><a class="header" href="#ビット選択">ビット選
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/07_range.html b/nightly/book/ja/05_language_reference/04_expression/07_range.html
index dc353c25..bbe15525 100644
--- a/nightly/book/ja/05_language_reference/04_expression/07_range.html
+++ b/nightly/book/ja/05_language_reference/04_expression/07_range.html
@@ -315,7 +315,7 @@ <h1 id="範囲"><a class="header" href="#範囲">範囲</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/08_msb_lsb.html b/nightly/book/ja/05_language_reference/04_expression/08_msb_lsb.html
index 24dacb24..349cb9f6 100644
--- a/nightly/book/ja/05_language_reference/04_expression/08_msb_lsb.html
+++ b/nightly/book/ja/05_language_reference/04_expression/08_msb_lsb.html
@@ -308,7 +308,7 @@ <h1 id="msb--lsb"><a class="header" href="#msb--lsb">msb / lsb</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/04_expression/09_inside_outside.html b/nightly/book/ja/05_language_reference/04_expression/09_inside_outside.html
index b8b75f08..926fdcf4 100644
--- a/nightly/book/ja/05_language_reference/04_expression/09_inside_outside.html
+++ b/nightly/book/ja/05_language_reference/04_expression/09_inside_outside.html
@@ -310,7 +310,7 @@ <h1 id="inside--outside"><a class="header" href="#inside--outside">inside / outs
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement.html b/nightly/book/ja/05_language_reference/05_statement.html
index 90559d8b..bb7c0f2f 100644
--- a/nightly/book/ja/05_language_reference/05_statement.html
+++ b/nightly/book/ja/05_language_reference/05_statement.html
@@ -302,7 +302,7 @@ <h1 id="文"><a class="header" href="#文">文</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/01_assignment.html b/nightly/book/ja/05_language_reference/05_statement/01_assignment.html
index 313e7ced..1d58d328 100644
--- a/nightly/book/ja/05_language_reference/05_statement/01_assignment.html
+++ b/nightly/book/ja/05_language_reference/05_statement/01_assignment.html
@@ -336,7 +336,7 @@ <h1 id="代入"><a class="header" href="#代入">代入</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/02_function_call.html b/nightly/book/ja/05_language_reference/05_statement/02_function_call.html
index b4d28826..3328a0b2 100644
--- a/nightly/book/ja/05_language_reference/05_statement/02_function_call.html
+++ b/nightly/book/ja/05_language_reference/05_statement/02_function_call.html
@@ -308,7 +308,7 @@ <h1 id="関数呼び出し"><a class="header" href="#関数呼び出し">関数
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/03_if.html b/nightly/book/ja/05_language_reference/05_statement/03_if.html
index 8845577d..0d8fc3b8 100644
--- a/nightly/book/ja/05_language_reference/05_statement/03_if.html
+++ b/nightly/book/ja/05_language_reference/05_statement/03_if.html
@@ -317,7 +317,7 @@ <h1 id="if"><a class="header" href="#if">if</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/04_case.html b/nightly/book/ja/05_language_reference/05_statement/04_case.html
index 7d1a6126..5546b700 100644
--- a/nightly/book/ja/05_language_reference/05_statement/04_case.html
+++ b/nightly/book/ja/05_language_reference/05_statement/04_case.html
@@ -320,7 +320,7 @@ <h1 id="case"><a class="header" href="#case">case</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/05_for.html b/nightly/book/ja/05_language_reference/05_statement/05_for.html
index 2322fb70..b566ad03 100644
--- a/nightly/book/ja/05_language_reference/05_statement/05_for.html
+++ b/nightly/book/ja/05_language_reference/05_statement/05_for.html
@@ -317,7 +317,7 @@ <h1 id="for"><a class="header" href="#for">for</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/06_return.html b/nightly/book/ja/05_language_reference/05_statement/06_return.html
index b71346b9..8e3b6b5b 100644
--- a/nightly/book/ja/05_language_reference/05_statement/06_return.html
+++ b/nightly/book/ja/05_language_reference/05_statement/06_return.html
@@ -308,7 +308,7 @@ <h1 id="return"><a class="header" href="#return">return</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/05_statement/07_let.html b/nightly/book/ja/05_language_reference/05_statement/07_let.html
index 38b44c5e..b1385c46 100644
--- a/nightly/book/ja/05_language_reference/05_statement/07_let.html
+++ b/nightly/book/ja/05_language_reference/05_statement/07_let.html
@@ -324,7 +324,7 @@ <h1 id="let"><a class="header" href="#let">let</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration.html b/nightly/book/ja/05_language_reference/06_declaration.html
index f6728d4a..5065f7d0 100644
--- a/nightly/book/ja/05_language_reference/06_declaration.html
+++ b/nightly/book/ja/05_language_reference/06_declaration.html
@@ -302,7 +302,7 @@ <h1 id="宣言"><a class="header" href="#宣言">宣言</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/01_variable.html b/nightly/book/ja/05_language_reference/06_declaration/01_variable.html
index 349aa0e3..61361077 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/01_variable.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/01_variable.html
@@ -317,7 +317,7 @@ <h1 id="変数"><a class="header" href="#変数">変数</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/02_parameter.html b/nightly/book/ja/05_language_reference/06_declaration/02_parameter.html
index 6dab6805..fb81736a 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/02_parameter.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/02_parameter.html
@@ -308,7 +308,7 @@ <h1 id="パラメータ"><a class="header" href="#パラメータ">パラメー
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/03_register.html b/nightly/book/ja/05_language_reference/06_declaration/03_register.html
index 4a3445cc..95386006 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/03_register.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/03_register.html
@@ -324,7 +324,7 @@ <h1 id="レジスタ"><a class="header" href="#レジスタ">レジスタ</a></h
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/04_combinational.html b/nightly/book/ja/05_language_reference/06_declaration/04_combinational.html
index 81658624..6daa9c8f 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/04_combinational.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/04_combinational.html
@@ -311,7 +311,7 @@ <h1 id="組み合わせ回路"><a class="header" href="#組み合わせ回路">
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/05_assign.html b/nightly/book/ja/05_language_reference/06_declaration/05_assign.html
index 40ccd87f..7b3e5cc9 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/05_assign.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/05_assign.html
@@ -308,7 +308,7 @@ <h1 id="assign"><a class="header" href="#assign">assign</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/06_function.html b/nightly/book/ja/05_language_reference/06_declaration/06_function.html
index 6f333ac4..3373dd78 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/06_function.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/06_function.html
@@ -324,7 +324,7 @@ <h1 id="関数"><a class="header" href="#関数">関数</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/07_initial_final.html b/nightly/book/ja/05_language_reference/06_declaration/07_initial_final.html
index e4facec6..4337368f 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/07_initial_final.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/07_initial_final.html
@@ -312,7 +312,7 @@ <h1 id="initial--final"><a class="header" href="#initial--final">initial / final
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/08_attribute.html b/nightly/book/ja/05_language_reference/06_declaration/08_attribute.html
index 8b365691..dc20f54d 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/08_attribute.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/08_attribute.html
@@ -311,7 +311,7 @@ <h2 id="sv-アトリビュート"><a class="header" href="#sv-アトリビュー
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/09_generate.html b/nightly/book/ja/05_language_reference/06_declaration/09_generate.html
index dd8d3171..66fef2a7 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/09_generate.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/09_generate.html
@@ -314,7 +314,7 @@ <h1 id="生成"><a class="header" href="#生成">生成</a></h1>
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/10_instantiation.html b/nightly/book/ja/05_language_reference/06_declaration/10_instantiation.html
index bb1b469f..03be44a7 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/10_instantiation.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/10_instantiation.html
@@ -325,7 +325,7 @@ <h1 id="インスタンス"><a class="header" href="#インスタンス">イン
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/11_named_block.html b/nightly/book/ja/05_language_reference/06_declaration/11_named_block.html
index 805fd7e5..45905a8d 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/11_named_block.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/11_named_block.html
@@ -312,7 +312,7 @@ <h1 id="名前付きブロック"><a class="header" href="#名前付きブロッ
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/06_declaration/12_import_export.html b/nightly/book/ja/05_language_reference/06_declaration/12_import_export.html
index 6bf7e10d..ad36bd34 100644
--- a/nightly/book/ja/05_language_reference/06_declaration/12_import_export.html
+++ b/nightly/book/ja/05_language_reference/06_declaration/12_import_export.html
@@ -329,7 +329,7 @@ <h1 id="import--export"><a class="header" href="#import--export">Import / Export
         <script src="../../highlight.js"></script>
         <script src="../../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/07_module.html b/nightly/book/ja/05_language_reference/07_module.html
index 99b5af4d..d9dd4eb6 100644
--- a/nightly/book/ja/05_language_reference/07_module.html
+++ b/nightly/book/ja/05_language_reference/07_module.html
@@ -328,7 +328,7 @@ <h1 id="モジュール"><a class="header" href="#モジュール">モジュー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/08_interface.html b/nightly/book/ja/05_language_reference/08_interface.html
index a235c36f..a66d007f 100644
--- a/nightly/book/ja/05_language_reference/08_interface.html
+++ b/nightly/book/ja/05_language_reference/08_interface.html
@@ -322,7 +322,7 @@ <h1 id="インターフェース"><a class="header" href="#インターフェー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/09_package.html b/nightly/book/ja/05_language_reference/09_package.html
index 1f8c086a..81516579 100644
--- a/nightly/book/ja/05_language_reference/09_package.html
+++ b/nightly/book/ja/05_language_reference/09_package.html
@@ -307,7 +307,7 @@ <h1 id="パッケージ"><a class="header" href="#パッケージ">パッケー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/10_systemverilog_interoperation.html b/nightly/book/ja/05_language_reference/10_systemverilog_interoperation.html
index 2c131ea5..57ef8a6f 100644
--- a/nightly/book/ja/05_language_reference/10_systemverilog_interoperation.html
+++ b/nightly/book/ja/05_language_reference/10_systemverilog_interoperation.html
@@ -309,7 +309,7 @@ <h1 id="systemverilogとの相互運用"><a class="header" href="#systemverilog
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/11_visibility.html b/nightly/book/ja/05_language_reference/11_visibility.html
index 6b41af92..fd9cbfe6 100644
--- a/nightly/book/ja/05_language_reference/11_visibility.html
+++ b/nightly/book/ja/05_language_reference/11_visibility.html
@@ -309,7 +309,7 @@ <h1 id="可視性"><a class="header" href="#可視性">可視性</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/12_foreign_language_integration.html b/nightly/book/ja/05_language_reference/12_foreign_language_integration.html
index ced3d1ca..14a57ffc 100644
--- a/nightly/book/ja/05_language_reference/12_foreign_language_integration.html
+++ b/nightly/book/ja/05_language_reference/12_foreign_language_integration.html
@@ -319,7 +319,7 @@ <h2 id="include-宣言"><a class="header" href="#include-宣言"><code>include</
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/13_integrated_test.html b/nightly/book/ja/05_language_reference/13_integrated_test.html
index cb46a0f7..25286251 100644
--- a/nightly/book/ja/05_language_reference/13_integrated_test.html
+++ b/nightly/book/ja/05_language_reference/13_integrated_test.html
@@ -314,7 +314,7 @@ <h1 id="組み込みテスト"><a class="header" href="#組み込みテスト">
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/05_language_reference/14_generics.html b/nightly/book/ja/05_language_reference/14_generics.html
index 3f340b2d..7779c15d 100644
--- a/nightly/book/ja/05_language_reference/14_generics.html
+++ b/nightly/book/ja/05_language_reference/14_generics.html
@@ -368,7 +368,7 @@ <h2 id="ジェネリック構造体"><a class="header" href="#ジェネリック
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment.html b/nightly/book/ja/06_development_environment.html
index 727f602e..19706ec8 100644
--- a/nightly/book/ja/06_development_environment.html
+++ b/nightly/book/ja/06_development_environment.html
@@ -302,7 +302,7 @@ <h1 id="開発環境"><a class="header" href="#開発環境">開発環境</a></h
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/01_project_configuration.html b/nightly/book/ja/06_development_environment/01_project_configuration.html
index 5acdaa11..3b4ff17d 100644
--- a/nightly/book/ja/06_development_environment/01_project_configuration.html
+++ b/nightly/book/ja/06_development_environment/01_project_configuration.html
@@ -419,7 +419,7 @@ <h2 id="the-dependencies-section"><a class="header" href="#the-dependencies-sect
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/02_dependencies.html b/nightly/book/ja/06_development_environment/02_dependencies.html
index eeea7053..1aac8569 100644
--- a/nightly/book/ja/06_development_environment/02_dependencies.html
+++ b/nightly/book/ja/06_development_environment/02_dependencies.html
@@ -351,7 +351,7 @@ <h2 id="バージョン要求"><a class="header" href="#バージョン要求">
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/03_publish_project.html b/nightly/book/ja/06_development_environment/03_publish_project.html
index d4d7adfb..c0dcd2ff 100644
--- a/nightly/book/ja/06_development_environment/03_publish_project.html
+++ b/nightly/book/ja/06_development_environment/03_publish_project.html
@@ -343,7 +343,7 @@ <h3 id="設定"><a class="header" href="#設定">設定</a></h3>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/04_directory_layout.html b/nightly/book/ja/06_development_environment/04_directory_layout.html
index a5124e9e..d892fe03 100644
--- a/nightly/book/ja/06_development_environment/04_directory_layout.html
+++ b/nightly/book/ja/06_development_environment/04_directory_layout.html
@@ -392,7 +392,7 @@ <h2 id="gitignore-について"><a class="header" href="#gitignore-について"
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/05_formatter.html b/nightly/book/ja/06_development_environment/05_formatter.html
index 83699544..c0c8ab76 100644
--- a/nightly/book/ja/06_development_environment/05_formatter.html
+++ b/nightly/book/ja/06_development_environment/05_formatter.html
@@ -309,7 +309,7 @@ <h1 id="フォーマッタ"><a class="header" href="#フォーマッタ">フォ
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/06_linter.html b/nightly/book/ja/06_development_environment/06_linter.html
index c0f7c92a..5ddf3ac4 100644
--- a/nightly/book/ja/06_development_environment/06_linter.html
+++ b/nightly/book/ja/06_development_environment/06_linter.html
@@ -389,7 +389,7 @@ <h2 id="lintnaming-セクション"><a class="header" href="#lintnaming-セク
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/07_simulator.html b/nightly/book/ja/06_development_environment/07_simulator.html
index a8236afb..8d7186e7 100644
--- a/nightly/book/ja/06_development_environment/07_simulator.html
+++ b/nightly/book/ja/06_development_environment/07_simulator.html
@@ -347,7 +347,7 @@ <h2 id="testvivado-セクション"><a class="header" href="#testvivado-セク
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/08_language_server.html b/nightly/book/ja/06_development_environment/08_language_server.html
index f7009c39..4226eb23 100644
--- a/nightly/book/ja/06_development_environment/08_language_server.html
+++ b/nightly/book/ja/06_development_environment/08_language_server.html
@@ -306,7 +306,7 @@ <h1 id="言語サーバ"><a class="header" href="#言語サーバ">言語サー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/09_compatibility.html b/nightly/book/ja/06_development_environment/09_compatibility.html
index 33a06d31..cddcb92d 100644
--- a/nightly/book/ja/06_development_environment/09_compatibility.html
+++ b/nightly/book/ja/06_development_environment/09_compatibility.html
@@ -314,7 +314,7 @@ <h3 id="文字列パラメータ"><a class="header" href="#文字列パラメー
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/10_documentation.html b/nightly/book/ja/06_development_environment/10_documentation.html
index df8888f4..f314bfaf 100644
--- a/nightly/book/ja/06_development_environment/10_documentation.html
+++ b/nightly/book/ja/06_development_environment/10_documentation.html
@@ -339,7 +339,7 @@ <h1 id="ドキュメンテーション"><a class="header" href="#ドキュメン
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/06_development_environment/11_github_action.html b/nightly/book/ja/06_development_environment/11_github_action.html
index 0b6d5c67..0960d785 100644
--- a/nightly/book/ja/06_development_environment/11_github_action.html
+++ b/nightly/book/ja/06_development_environment/11_github_action.html
@@ -350,7 +350,7 @@ <h1 id="github-action"><a class="header" href="#github-action">GitHub Action</a>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/07_appendix.html b/nightly/book/ja/07_appendix.html
index d4cc5ac7..0f89012f 100644
--- a/nightly/book/ja/07_appendix.html
+++ b/nightly/book/ja/07_appendix.html
@@ -301,7 +301,7 @@ <h1 id="補遺"><a class="header" href="#補遺">補遺</a></h1>
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/07_appendix/01_formal_syntax.html b/nightly/book/ja/07_appendix/01_formal_syntax.html
index 71e43c98..d779c36b 100644
--- a/nightly/book/ja/07_appendix/01_formal_syntax.html
+++ b/nightly/book/ja/07_appendix/01_formal_syntax.html
@@ -1132,7 +1132,7 @@ <h1 id="構文"><a class="header" href="#構文">構文</a></h1>
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/07_appendix/02_semantic_error.html b/nightly/book/ja/07_appendix/02_semantic_error.html
index 2137388a..1ece39c7 100644
--- a/nightly/book/ja/07_appendix/02_semantic_error.html
+++ b/nightly/book/ja/07_appendix/02_semantic_error.html
@@ -320,7 +320,7 @@ <h2 id="unused_variable"><a class="header" href="#unused_variable">unused_variab
         <script src="../highlight.js"></script>
         <script src="../book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/404.html b/nightly/book/ja/404.html
index 7555653e..d1232721 100644
--- a/nightly/book/ja/404.html
+++ b/nightly/book/ja/404.html
@@ -291,7 +291,7 @@ <h1 id="document-not-found-404"><a class="header" href="#document-not-found-404"
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/index.html b/nightly/book/ja/index.html
index 10065a4d..205e341c 100644
--- a/nightly/book/ja/index.html
+++ b/nightly/book/ja/index.html
@@ -304,7 +304,7 @@ <h2 id="生産性"><a class="header" href="#生産性">生産性</a></h2>
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/ja/print.html b/nightly/book/ja/print.html
index 1052fa44..c4dcf6ba 100644
--- a/nightly/book/ja/print.html
+++ b/nightly/book/ja/print.html
@@ -3397,7 +3397,7 @@ <h2 id="unused_variable"><a class="header" href="#unused_variable">unused_variab
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>
diff --git a/nightly/book/print.html b/nightly/book/print.html
index 395fdb0e..3ef748f7 100644
--- a/nightly/book/print.html
+++ b/nightly/book/print.html
@@ -3586,7 +3586,7 @@ <h2 id="unused_variable"><a class="header" href="#unused_variable">unused_variab
         <script src="highlight.js"></script>
         <script src="book.js"></script>
         <script type="module">
-            import init, {build, format} from "https://doc.veryl-lang.org/playground/pkg/veryl_wasm.js";
+            import init, {build, format} from "https://doc.veryl-lang.org/nightly/playground/pkg/veryl_wasm.js";
             init().then(() => {});
             window.build = build;
         </script>