diff --git a/packages/agent-builtin/src/cli.ts b/packages/agent-builtin/src/cli.ts
index d3fda1e..57042b4 100755
--- a/packages/agent-builtin/src/cli.ts
+++ b/packages/agent-builtin/src/cli.ts
@@ -1,4 +1,4 @@
-#!/usr/bin/env bun
+#!/usr/bin/env node
 
 import { createBuiltinAgent } from "./agent.js";
 
diff --git a/packages/agent-claude-code/src/cli.ts b/packages/agent-claude-code/src/cli.ts
index eb28ec5..0e26393 100644
--- a/packages/agent-claude-code/src/cli.ts
+++ b/packages/agent-claude-code/src/cli.ts
@@ -1,4 +1,4 @@
-#!/usr/bin/env bun
+#!/usr/bin/env node
 
 import { createClaudeCodeAgent } from "./claude-code.js";
 
diff --git a/packages/agent-hermes/__tests__/issue-551.test.ts b/packages/agent-hermes/__tests__/issue-551.test.ts
index 0896e8c..761b656 100644
--- a/packages/agent-hermes/__tests__/issue-551.test.ts
+++ b/packages/agent-hermes/__tests__/issue-551.test.ts
@@ -12,11 +12,11 @@ describe("Issue #551 — bin entry & engines", () => {
     expect(pkg.engines?.bun).toBeUndefined();
   });
 
-  test("bin entry file has bun shebang", () => {
+  test("bin entry file has node shebang", () => {
     const pkg = JSON.parse(readFileSync(join(PKG_ROOT, "package.json"), "utf-8"));
     const binPath = pkg.bin["uwf-hermes"];
     const content = readFileSync(join(PKG_ROOT, binPath), "utf-8");
-    expect(content.startsWith("#!/usr/bin/env bun")).toBe(true);
+    expect(content.startsWith("#!/usr/bin/env node")).toBe(true);
   });
 
   test("README.md explains uwf-hermes is an adapter", () => {
diff --git a/packages/agent-hermes/src/cli.ts b/packages/agent-hermes/src/cli.ts
index 39941d1..8e6d26e 100755
--- a/packages/agent-hermes/src/cli.ts
+++ b/packages/agent-hermes/src/cli.ts
@@ -1,4 +1,4 @@
-#!/usr/bin/env bun
+#!/usr/bin/env node
 
 import { createHermesAgent } from "./hermes.js";
 
diff --git a/packages/util-agent/src/run.ts b/packages/util-agent/src/run.ts
index c056e64..ae81038 100644
--- a/packages/util-agent/src/run.ts
+++ b/packages/util-agent/src/run.ts
@@ -192,7 +192,7 @@ export function createAgent(options: AgentOptions): () => Promise<void> {
     let assembledPromptHash: CasRef | null = null;
     if (promptText !== "") {
       try {
-        assembledPromptHash = ctx.meta.store.cas.put(ctx.meta.schemas.text, promptText);
+        assembledPromptHash = await ctx.meta.store.cas.put(ctx.meta.schemas.text, promptText);
       } catch {
         assembledPromptHash = null;
       }