fix(harmony): load core aspects from bit's own install when workspace dist is missing

scopes/harmony/bit/hook-require.ts

@@ -22,6 +22,22 @@ export function hookRequire() {
         if (!pkgJson.main || pkgJson.main === 'index.js') throw firstErr;
         return this.constructor._load(path.join(id, pkgJson.main), this);
       } catch {
+        // Last resort for Bit's own core-aspect packages (`@teambit/*`). In a workspace where
+        // these are source components (most notably the Bit repo itself), an env loaded from
+        // root node_modules can eagerly `require('@teambit/builder')` during `bit install` —
+        // before the workspace component is compiled — so the resolved copy's `dist` main
+        // doesn't exist yet and the require above hard-crashes. Bit's own installation always
+        // ships a compiled copy of its core aspects, so re-resolve from this module's context
+        // (inside `@teambit/bit`) and load that instead of failing. Only runs on the crash
+        // path, so the happy path (dist present, e.g. every normal user workspace) is untouched.
+        if (id.startsWith('@teambit/')) {
+          try {
+            const fromBitContext = require.resolve(id, { paths: [__dirname] });
+            return this.constructor._load(fromBitContext, this);
+          } catch {
+            throw firstErr;
+          }
+        }
         throw firstErr;
       }
     }