From dc77372e47a4367ce7ecc712bc92e650ca825315 Mon Sep 17 00:00:00 2001
From: "Sophia (Turner)" <me@sophia-dev.io>
Date: Sat, 21 Mar 2026 14:31:53 +0900
Subject: [PATCH] fix(react): resolve default re-export bindings from imported
 identifiers

When a barrel file re-exports an imported identifier as the default
export (`import X from './X'; export default X`), the identifier only
exists in `importsByLocalName`, not `symbolsByName`. The previous code
silently dropped it, causing components like `<Footer />` to disappear
from the react usage tree.

Pass `importsByLocalName` and `reExportBindingsByName` into
`collectDefaultExport` so it can fall back to creating a re-export
binding when the identifier is not a locally defined symbol.

Closes #103

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 src/analyzers/react/bindings.ts | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/src/analyzers/react/bindings.ts b/src/analyzers/react/bindings.ts
index 5c2824d..41cd176 100644
--- a/src/analyzers/react/bindings.ts
+++ b/src/analyzers/react/bindings.ts
@@ -42,7 +42,13 @@ export function collectImportsAndExports(
       collectExportAllBindings(statement, sourceDependencies, exportAllBindings)
       return
     case 'ExportDefaultDeclaration':
-      collectDefaultExport(statement, symbolsByName, exportsByName)
+      collectDefaultExport(
+        statement,
+        symbolsByName,
+        importsByLocalName,
+        exportsByName,
+        reExportBindingsByName,
+      )
       return
     default:
       return
@@ -198,7 +204,9 @@ function collectExportAllBindings(
 function collectDefaultExport(
   declaration: ExportDefaultDeclaration,
   symbolsByName: ReadonlyMap<string, PendingReactUsageNode>,
+  importsByLocalName: ReadonlyMap<string, ImportBinding>,
   exportsByName: Map<string, string>,
+  reExportBindingsByName: Map<string, ImportBinding>,
 ): void {
   if (
     declaration.declaration.type === 'FunctionDeclaration' ||
@@ -212,12 +220,15 @@ function collectDefaultExport(
   }
 
   if (declaration.declaration.type === 'Identifier') {
-    addExportBinding(
-      declaration.declaration.name,
-      'default',
-      symbolsByName,
-      exportsByName,
-    )
+    const localName = declaration.declaration.name
+    addExportBinding(localName, 'default', symbolsByName, exportsByName)
+
+    if (!exportsByName.has('default')) {
+      const importBinding = importsByLocalName.get(localName)
+      if (importBinding !== undefined) {
+        reExportBindingsByName.set('default', importBinding)
+      }
+    }
     return
   }