diff --git a/package-lock.json b/package-lock.json
index cd97d2cc..473c771a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25652,18 +25652,17 @@
       }
     },
     "packages/@apphosting/build": {
-      "version": "0.1.1",
+      "version": "0.1.3",
       "license": "Apache-2.0",
       "dependencies": {
-        "@apphosting/discover": "*",
+        "@apphosting/common": "*",
         "colorette": "^2.0.20",
         "commander": "^11.1.0",
         "npm-pick-manifest": "^9.0.0",
         "ts-node": "^10.9.1"
       },
       "bin": {
-        "apphosting-local-build": "dist/bin/localbuild.js",
-        "build": "dist/bin/build.js"
+        "apphosting-local-build": "dist/bin/localbuild.js"
       },
       "devDependencies": {
         "@types/commander": "*",
@@ -25742,7 +25741,7 @@
       }
     },
     "packages/@apphosting/common": {
-      "version": "0.0.7",
+      "version": "0.0.8",
       "license": "Apache-2.0"
     },
     "packages/@apphosting/create": {
diff --git a/packages/@apphosting/build/src/bin/localbuild.ts b/packages/@apphosting/build/src/bin/localbuild.ts
index 0082c105..89d613fc 100644
--- a/packages/@apphosting/build/src/bin/localbuild.ts
+++ b/packages/@apphosting/build/src/bin/localbuild.ts
@@ -1,23 +1,12 @@
 #! /usr/bin/env node
-import { SupportedFrameworks } from "@apphosting/common";
-import { adapterBuild } from "../index.js";
+import { localBuild } from "../index.js";
 import { program } from "commander";
 
 program
   .argument("<projectRoot>", "path to the project's root directory")
   .option("--framework <framework>")
   .action(async (projectRoot, opts) => {
-    // TODO(#382): support other apphosting.*.yaml files.
-
-    // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during build time.
-    if (opts.framework && SupportedFrameworks.includes(opts.framework)) {
-      // TODO(#382): Skip this if there's a custom build command in apphosting.yaml.
-      await adapterBuild(projectRoot, opts.framework);
-    }
-
-    // TODO(#382): Parse apphosting.yaml to set custom run command in bundle.yaml
-    // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during runtime to include in the bunde.yaml
-    // TODO(#382): parse apphosting.yaml for runConfig to include in bundle.yaml
+    await localBuild(projectRoot, opts.framework);
   });
 
 program.parse();
diff --git a/packages/@apphosting/build/src/index.ts b/packages/@apphosting/build/src/index.ts
index 07a0b428..1690d863 100644
--- a/packages/@apphosting/build/src/index.ts
+++ b/packages/@apphosting/build/src/index.ts
@@ -1,7 +1,34 @@
 import promiseSpawn from "@npmcli/promise-spawn";
+import { readFileSync, existsSync } from "fs";
+import { join } from "path";
 import { yellow, bgRed, bold } from "colorette";
+import { OutputBundleConfig } from "@apphosting/common";
+import { SupportedFrameworks, Framework } from "@apphosting/common";
+import { parse as parseYaml } from "yaml";
+
+export async function localBuild(
+  projectRoot: string,
+  framework?: string,
+): Promise<OutputBundleConfig> {
+  if (framework && SupportedFrameworks.includes(framework as Framework)) {
+    // TODO(#382): Skip this if there's a custom build command in apphosting.yaml.
+    await adapterBuild(projectRoot, framework);
+    const bundleYamlPath = join(projectRoot, ".apphosting", "bundle.yaml");
+    if (!existsSync(bundleYamlPath)) {
+      throw new Error(`Cannot load ${bundleYamlPath} from given path, it doesn't exist`);
+    }
+    return parseYaml(readFileSync(bundleYamlPath, "utf8")) as OutputBundleConfig;
+  }
+  throw new Error("framework not supported");
+}
+
+export async function adapterBuild(
+  projectRoot: string,
+  framework: string,
+): Promise<OutputBundleConfig> {
+  // TODO(#382): support other apphosting.*.yaml files.
+  // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during build time.
 
-export async function adapterBuild(projectRoot: string, framework: string) {
   // TODO(#382): We are using the latest framework adapter versions, but in the future
   // we should parse the framework version and use the matching adapter version.
   const adapterName = `@apphosting/adapter-${framework}`;
@@ -30,4 +57,14 @@ export async function adapterBuild(projectRoot: string, framework: string) {
     shell: true,
     stdio: "inherit",
   });
+
+  const bundleYamlPath = join(projectRoot, ".apphosting", "bundle.yaml");
+  if (!existsSync(bundleYamlPath)) {
+    throw new Error(`Cannot load ${bundleYamlPath} from given path, it doesn't exist`);
+  }
+  return parseYaml(readFileSync(bundleYamlPath, "utf8")) as OutputBundleConfig;
+
+  // TODO(#382): Parse apphosting.yaml to set custom run command in bundle.yaml
+  // TODO(#382): parse apphosting.yaml for runConfig to include in bundle.yaml
+  // TODO(#382): parse apphosting.yaml for environment variables / secrets needed during runtime to include in the bundle.yaml
 }
diff --git a/packages/@apphosting/common/src/index.ts b/packages/@apphosting/common/src/index.ts
index a11f239e..93ee0ac2 100644
--- a/packages/@apphosting/common/src/index.ts
+++ b/packages/@apphosting/common/src/index.ts
@@ -4,6 +4,7 @@ import * as path from "node:path";
 
 // List of apphosting supported frameworks.
 export const SupportedFrameworks = ["nextjs", "angular"] as const;
+export type Framework = (typeof SupportedFrameworks)[number];
 
 // **** OutputBundleConfig interfaces ****