diff --git a/gitnexus/src/core/ingestion/languages/vue/captures.ts b/gitnexus/src/core/ingestion/languages/vue/captures.ts
index b8031fcdd0..b8ec7a8a46 100644
--- a/gitnexus/src/core/ingestion/languages/vue/captures.ts
+++ b/gitnexus/src/core/ingestion/languages/vue/captures.ts
@@ -22,6 +22,7 @@
 import type { CaptureMatch } from 'gitnexus-shared';
 import { extractVueScript } from '../../vue-sfc-extractor.js';
 import { emitTsScopeCaptures } from '../typescript/captures.js';
+import { emitJsScopeCaptures } from '../javascript/captures.js';
 
 /**
  * Emit scope captures for a Vue SFC.
@@ -31,11 +32,11 @@ import { emitTsScopeCaptures } from '../typescript/captures.js';
  *   1. **Full SFC content** (sequential path, <15 files): `sourceText`
  *      contains the whole `.vue` file with `<template>`, `<script>`, etc.
  *      `extractVueScript` extracts the script block and we delegate to
- *      `emitTsScopeCaptures` with that extracted content.
+ *      `emitTsScopeCaptures` or `emitJsScopeCaptures` based on `lang`.
  *
  *   2. **Already-extracted script content** (worker-mode path, ≥15 files):
  *      the parse worker calls `extractVueScript` itself before calling
- *      `extractParsedFile`, so `sourceText` is already the bare TypeScript
+ *      `extractParsedFile`, so `sourceText` is already the bare script
  *      text with no `<script>` tags. The caller marks this explicitly via
  *      `sourceMeta.sourceKind === 'pre-extracted-script'`.
  *
@@ -48,7 +49,7 @@ export function emitVueScopeCaptures(
   sourceText: string,
   filePath: string,
   cachedTree?: unknown,
-  sourceMeta?: { sourceKind?: 'full-file' | 'pre-extracted-script' },
+  sourceMeta?: { sourceKind?: 'full-file' | 'pre-extracted-script'; setupLang?: string },
 ): readonly CaptureMatch[] {
   // Vue resolver may include supporting TS/JS files in the same run to
   // preserve cross-file import/type context for `.vue` callers. These are
@@ -58,10 +59,19 @@ export function emitVueScopeCaptures(
   }
 
   if (sourceMeta?.sourceKind === 'pre-extracted-script') {
+    // Worker-mode path: the parse worker always uses TypeScript grammar for
+    // .vue files. Lang-based grammar selection is a sequential-path feature.
     return emitTsScopeCaptures(sourceText, filePath, cachedTree);
   }
 
   const extracted = extractVueScript(sourceText);
   if (extracted === null) return [];
+
+  // Select captures based on script lang attribute.
+  // Use TS grammar unless ALL blocks explicitly request JS/JSX.
+  // Mixed-lang: TS handles JS natively; JS grammar chokes on TS syntax.
+  if (extracted.lang === 'js' || extracted.lang === 'jsx') {
+    return emitJsScopeCaptures(extracted.scriptContent, filePath, cachedTree);
+  }
   return emitTsScopeCaptures(extracted.scriptContent, filePath, cachedTree);
 }
diff --git a/gitnexus/src/core/ingestion/vue-sfc-extractor.ts b/gitnexus/src/core/ingestion/vue-sfc-extractor.ts
index 1f899fa821..e68f230d6c 100644
--- a/gitnexus/src/core/ingestion/vue-sfc-extractor.ts
+++ b/gitnexus/src/core/ingestion/vue-sfc-extractor.ts
@@ -10,10 +10,13 @@
 export interface VueScriptExtraction {
   /** Extracted script content (TypeScript/JavaScript) */
   scriptContent: string;
-  /** 0-based line number in the .vue file where the script content starts */
+  /** 1-based line number in the .vue file where the script content starts
+   * (used as offset from tree-sitter's 0-based row). */
   lineOffset: number;
-  /** true if the primary block is <script setup> */
+  /** true if at least one block is <script setup> */
   isSetup: boolean;
+  /** Value of the `lang` attribute on the extracted script block (e.g. "ts", "js", "tsx", "jsx", or "" for default). */
+  lang: string;
 }
 
 interface ScriptBlock {
@@ -238,11 +241,9 @@ function parseScriptBlock(
 /**
  * Extract script content from a Vue SFC.
  *
- * When both <script> and <script setup> are present, returns only the
- * <script setup> block (the dominant pattern — 94% of Vue files in real
- * projects use setup). The <script> (non-setup) block typically contains
- * only `defineOptions` or legacy option merges and is less important for
- * the knowledge graph.
+ * When both <script> and <script setup> are present, the content of all
+ * blocks is combined (non-setup first, then setup) so the full script
+ * surface is available to the knowledge graph.
  */
 export function extractVueScript(vueContent: string): VueScriptExtraction | null {
   const blocks: ScriptBlock[] = [];
@@ -257,14 +258,22 @@ export function extractVueScript(vueContent: string): VueScriptExtraction | null
 
   if (blocks.length === 0) return null;
 
-  // Prefer <script setup> if present
-  const setupBlock = blocks.find((b) => b.isSetup);
-  const primary = setupBlock ?? blocks[0];
+  // Merge all blocks: non-setup first, then setup, so content order is stable.
+  const nonSetupBlocks = blocks.filter((b) => !b.isSetup);
+  const setupBlocks = blocks.filter((b) => b.isSetup);
+  const ordered = [...nonSetupBlocks, ...setupBlocks];
+  const combinedContent = ordered.map((b) => b.content).join('\n');
+  const lineOffset = ordered[0].lineOffset;
+  // Only use JavaScript grammar when ALL blocks are explicitly lang="js"
+  // or lang="jsx". If any block omits lang or uses ts/tsx, TypeScript wins.
+  const allBlocksJs = blocks.length > 0 && blocks.every((b) => b.lang === 'js' || b.lang === 'jsx');
+  const lang = allBlocksJs ? 'js' : '';
 
   return {
-    scriptContent: primary.content,
-    lineOffset: primary.lineOffset,
-    isSetup: primary.isSetup,
+    scriptContent: combinedContent,
+    lineOffset,
+    isSetup: blocks.some((b) => b.isSetup),
+    lang,
   };
 }
 
diff --git a/gitnexus/test/fixtures/lang-resolution/js-parsing-coverage/class-expression.ts b/gitnexus/test/fixtures/lang-resolution/js-parsing-coverage/class-expression.ts
new file mode 100644
index 0000000000..a8289bcee6
--- /dev/null
+++ b/gitnexus/test/fixtures/lang-resolution/js-parsing-coverage/class-expression.ts
@@ -0,0 +1,8 @@
+// F44: Class expression — should produce a Class scope for the expression body
+// On main: no @scope.class emitted → methods have no Class parent
+// On this branch: (class) @scope.class emitted → methods get Class scope
+export const instance = class {
+  greet(): string {
+    return 'hello';
+  }
+};
diff --git a/gitnexus/test/fixtures/vue-scope/vue-dual-script/App.vue b/gitnexus/test/fixtures/vue-scope/vue-dual-script/App.vue
new file mode 100644
index 0000000000..0a7d8b44cd
--- /dev/null
+++ b/gitnexus/test/fixtures/vue-scope/vue-dual-script/App.vue
@@ -0,0 +1,13 @@
+<template>
+  <div>Hello</div>
+</template>
+<script>
+function legacySetup() {
+  return { count: 0 };
+}
+</script>
+<script setup lang="ts">
+function setupInit() {
+  return 42;
+}
+</script>
diff --git a/gitnexus/test/fixtures/vue-scope/vue-js-lang/App.vue b/gitnexus/test/fixtures/vue-scope/vue-js-lang/App.vue
new file mode 100644
index 0000000000..06c6e70260
--- /dev/null
+++ b/gitnexus/test/fixtures/vue-scope/vue-js-lang/App.vue
@@ -0,0 +1,8 @@
+<template>
+  <div>Hello</div>
+</template>
+<script lang="js">
+function greet(name) {
+  return 'Hello ' + name;
+}
+</script>
diff --git a/gitnexus/test/integration/resolvers/vue-scope.test.ts b/gitnexus/test/integration/resolvers/vue-scope.test.ts
index 2a828316ff..062e5ede02 100644
--- a/gitnexus/test/integration/resolvers/vue-scope.test.ts
+++ b/gitnexus/test/integration/resolvers/vue-scope.test.ts
@@ -473,3 +473,38 @@ describe('Vue cross-file composable and class resolution', () => {
     expect(files.some((f) => f.endsWith('models.ts'))).toBe(true);
   });
 });
+
+// ---------------------------------------------------------------------------
+// F90 — dual-script merge (<script> + <script setup>)
+// ---------------------------------------------------------------------------
+
+describe('F90 — dual-script (<script> + <script setup>)', () => {
+  let result: PipelineResult;
+
+  beforeAll(async () => {
+    result = await runPipelineFromRepo(path.join(VUE_SCOPE_FIXTURES, 'vue-dual-script'), () => {});
+  }, 60000);
+
+  it('includes symbols from both the non-setup and setup blocks', () => {
+    const funcs = getNodesByLabel(result, 'Function');
+    expect(funcs).toContain('legacySetup');
+    expect(funcs).toContain('setupInit');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// F92 — JS-lang script block (<script lang="js">)
+// ---------------------------------------------------------------------------
+
+describe('F92 — JS-lang script block', () => {
+  let result: PipelineResult;
+
+  beforeAll(async () => {
+    result = await runPipelineFromRepo(path.join(VUE_SCOPE_FIXTURES, 'vue-js-lang'), () => {});
+  }, 60000);
+
+  it('parses <script lang="js"> content and finds functions', () => {
+    const funcs = getNodesByLabel(result, 'Function');
+    expect(funcs).toContain('greet');
+  });
+});
diff --git a/gitnexus/test/unit/vue-sfc-extractor.test.ts b/gitnexus/test/unit/vue-sfc-extractor.test.ts
index 62ff990e18..b77e0d34f8 100644
--- a/gitnexus/test/unit/vue-sfc-extractor.test.ts
+++ b/gitnexus/test/unit/vue-sfc-extractor.test.ts
@@ -45,13 +45,12 @@ export default {
     expect(result!.scriptContent).toContain('export default');
   });
 
-  it('prefers <script setup> when both blocks exist', () => {
+  it('combines both blocks when <script> and <script setup> both exist', () => {
     const vue = `<script lang="ts">
 export default {
   inheritAttrs: false,
 };
 </script>
-
 <script setup lang="ts">
 import { ref } from 'vue';
 const name = ref('test');
@@ -61,9 +60,78 @@ const name = ref('test');
 `;
     const result = extractVueScript(vue);
     expect(result).not.toBeNull();
+    // F90: both blocks are combined
     expect(result!.isSetup).toBe(true);
     expect(result!.scriptContent).toContain("const name = ref('test')");
-    expect(result!.scriptContent).not.toContain('inheritAttrs');
+    expect(result!.scriptContent).toContain('inheritAttrs');
+  });
+
+  it('returns lang from the script block', () => {
+    const vue = `<script lang="js">
+export default {};
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.lang).toBe('js');
+  });
+
+  it('returns empty lang when no lang attribute', () => {
+    const vue = `<script>
+export default {};
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.lang).toBe('');
+  });
+
+  it('jsx lang triggers JS grammar (maps to lang=js)', () => {
+    const vue = `<script lang="jsx">
+export default {};
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.lang).toBe('js');
+  });
+
+  it('ts lang returns empty (only js/jsx triggers JS grammar)', () => {
+    const vue = `<script lang="ts">
+export default {};
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.lang).toBe('');
+  });
+
+  it('mixed js + ts blocks return empty lang (TypeScript wins)', () => {
+    const vue = `<script lang="js">
+export default {};
+</script>
+<script setup lang="ts">
+import { ref } from 'vue';
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.lang).toBe('');
+  });
+
+  it('isSetup is true when at least one block is setup', () => {
+    const vue = `<script lang="ts">
+export default {};
+</script>
+<script setup lang="ts">
+import { ref } from 'vue';
+</script>
+`;
+    const result = extractVueScript(vue);
+    expect(result).not.toBeNull();
+    expect(result!.isSetup).toBe(true);
+    // ts blocks — lang should be empty
+    expect(result!.lang).toBe('');
   });
 
   it('returns null for .vue files with no <script> block', () => {