Make local graph execution optional across composed packages

src/execution-world/installation.ts

@@ -250,7 +250,9 @@ function assembleExecutionInstallation(
         })
       : undefined;
     const browserExports = exports.filter(
-      (entry) => entry.execution.kind !== "remote" && entry.execution.targets.includes("browser"),
+      (entry) =>
+        entry.execution.kind !== "remote" &&
+        entry.execution.targets.includes("target:org.quixos.execution.javascript@1"),
     );
     if (!browserExports.length) {
       if (selection.browser) fail(revision, "Package has no browser exports to select");
@@ -259,7 +261,7 @@ function assembleExecutionInstallation(
     }
     const browser = selectArtifactImplementation(manifest, {
       ...selection.browser,
-      target: "browser",
+      target: "target:org.quixos.execution.javascript@1",
       compatibility: "quixos-js-module-v1",
       exports: browserExports.map((entry) => entry.id),
     });