diff --git a/App/backend/src/adapters/outbound/skill-writer/codex/target.ts b/App/backend/src/adapters/outbound/skill-writer/codex/target.ts
index 54e75627c..a4c020e51 100644
--- a/App/backend/src/adapters/outbound/skill-writer/codex/target.ts
+++ b/App/backend/src/adapters/outbound/skill-writer/codex/target.ts
@@ -28,6 +28,8 @@ const LEGACY_HOOK_SCRIPT_FILE_NAME = "memmy-memory-resume-hook.mjs";
 const HOOK_CONFIG_FILE_NAME = "memmy-memory-config.json";
 const WORKSPACE_BRIDGE_FILE_NAME = "memmy-workspace-bridge.mjs";
 const HOOK_TIMEOUT_SECONDS = 60;
+/** Codex caps SessionEnd hooks at 3s and reports the clamped value as a hook loading problem. */
+const SESSION_END_HOOK_TIMEOUT_SECONDS = 3;
 const START_MARKER = "<!-- memmy:start v=1 -->";
 const END_MARKER = "<!-- memmy:end v=1 -->";
 const LEGACY_CLI_START_MARKER = "<!-- memmy-memory cli : start -->";
@@ -233,7 +235,12 @@ async function upsertCodexHookConfig(filePath: string, hookCommand: string): Pro
   ];
   hooks.SessionStart = codexHookEntries(hooks.SessionStart, hookCommand, "Loading Memmy world model");
   hooks.PostCompact = codexHookEntries(hooks.PostCompact, hookCommand, "Updating Memmy world model");
-  hooks.SessionEnd = codexHookEntries(hooks.SessionEnd, hookCommand, "Closing Memmy memory session");
+  hooks.SessionEnd = codexHookEntries(
+    hooks.SessionEnd,
+    hookCommand,
+    "Closing Memmy memory session",
+    SESSION_END_HOOK_TIMEOUT_SECONDS
+  );
   config.hooks = hooks;
   await writeFileAtomically(filePath, `${JSON.stringify(config, null, 2)}\n`);
 }
@@ -273,10 +280,15 @@ async function removeCodexHookConfig(filePath: string): Promise<void> {
   await writeFileAtomically(filePath, `${JSON.stringify(config, null, 2)}\n`);
 }
 
-function codexHookEntries(value: unknown, hookCommand: string, statusMessage: string): Record<string, unknown>[] {
+function codexHookEntries(
+  value: unknown,
+  hookCommand: string,
+  statusMessage: string,
+  timeout: number = HOOK_TIMEOUT_SECONDS
+): Record<string, unknown>[] {
   return [
     ...removeCodexResumeHookEntries(value),
-    { hooks: [{ type: "command", command: hookCommand, timeout: HOOK_TIMEOUT_SECONDS, statusMessage }] },
+    { hooks: [{ type: "command", command: hookCommand, timeout, statusMessage }] },
   ];
 }
 
diff --git a/App/backend/src/adapters/outbound/skill-writer/codex/tests/target.test.ts b/App/backend/src/adapters/outbound/skill-writer/codex/tests/target.test.ts
index 5ee80fafe..62e4f7961 100644
--- a/App/backend/src/adapters/outbound/skill-writer/codex/tests/target.test.ts
+++ b/App/backend/src/adapters/outbound/skill-writer/codex/tests/target.test.ts
@@ -127,6 +127,21 @@ describe("codex skill target", () => {
     }
   });
 
+  it("caps the SessionEnd hook timeout at the Codex limit and keeps the other hooks at the default", async () => {
+    const { rootDirectory, memmyConfigPath } = createFixture();
+    const target = createCodexSkillTarget({ rootDirectory, memmyConfigPath, trustHooks: noOpTrustHooks });
+
+    await target.installPlugin?.("codex");
+
+    const config = JSON.parse(readFileSync(join(rootDirectory, "hooks.json"), "utf8")) as {
+      hooks: Record<string, Array<{ hooks: Array<{ command: string; timeout: number; type: string }> }>>;
+    };
+    expect(config.hooks.SessionEnd?.[0]?.hooks[0]).toMatchObject({ type: "command", timeout: 3 });
+    expect(config.hooks.SessionEnd?.[0]?.hooks[0]?.command).toContain("memmy-resume-hook.mjs");
+    expect(config.hooks.SessionStart?.[0]?.hooks[0]).toMatchObject({ timeout: 60 });
+    expect(config.hooks.PostCompact?.[0]?.hooks[0]).toMatchObject({ timeout: 60 });
+  });
+
   it("persists trust for the installed user-level hooks before installation completes", async () => {
     const { rootDirectory, memmyConfigPath } = createFixture();
     let trustOptions: TrustMemmyCodexHooksOptions | undefined;
diff --git a/Memory/src/agent-source/integration/codex/target.ts b/Memory/src/agent-source/integration/codex/target.ts
index 54e75627c..a4c020e51 100644
--- a/Memory/src/agent-source/integration/codex/target.ts
+++ b/Memory/src/agent-source/integration/codex/target.ts
@@ -28,6 +28,8 @@ const LEGACY_HOOK_SCRIPT_FILE_NAME = "memmy-memory-resume-hook.mjs";
 const HOOK_CONFIG_FILE_NAME = "memmy-memory-config.json";
 const WORKSPACE_BRIDGE_FILE_NAME = "memmy-workspace-bridge.mjs";
 const HOOK_TIMEOUT_SECONDS = 60;
+/** Codex caps SessionEnd hooks at 3s and reports the clamped value as a hook loading problem. */
+const SESSION_END_HOOK_TIMEOUT_SECONDS = 3;
 const START_MARKER = "<!-- memmy:start v=1 -->";
 const END_MARKER = "<!-- memmy:end v=1 -->";
 const LEGACY_CLI_START_MARKER = "<!-- memmy-memory cli : start -->";
@@ -233,7 +235,12 @@ async function upsertCodexHookConfig(filePath: string, hookCommand: string): Pro
   ];
   hooks.SessionStart = codexHookEntries(hooks.SessionStart, hookCommand, "Loading Memmy world model");
   hooks.PostCompact = codexHookEntries(hooks.PostCompact, hookCommand, "Updating Memmy world model");
-  hooks.SessionEnd = codexHookEntries(hooks.SessionEnd, hookCommand, "Closing Memmy memory session");
+  hooks.SessionEnd = codexHookEntries(
+    hooks.SessionEnd,
+    hookCommand,
+    "Closing Memmy memory session",
+    SESSION_END_HOOK_TIMEOUT_SECONDS
+  );
   config.hooks = hooks;
   await writeFileAtomically(filePath, `${JSON.stringify(config, null, 2)}\n`);
 }
@@ -273,10 +280,15 @@ async function removeCodexHookConfig(filePath: string): Promise<void> {
   await writeFileAtomically(filePath, `${JSON.stringify(config, null, 2)}\n`);
 }
 
-function codexHookEntries(value: unknown, hookCommand: string, statusMessage: string): Record<string, unknown>[] {
+function codexHookEntries(
+  value: unknown,
+  hookCommand: string,
+  statusMessage: string,
+  timeout: number = HOOK_TIMEOUT_SECONDS
+): Record<string, unknown>[] {
   return [
     ...removeCodexResumeHookEntries(value),
-    { hooks: [{ type: "command", command: hookCommand, timeout: HOOK_TIMEOUT_SECONDS, statusMessage }] },
+    { hooks: [{ type: "command", command: hookCommand, timeout, statusMessage }] },
   ];
 }