fix(coding-agent): close codex websocket sessions

Fixes #4103

packages/coding-agent/CHANGELOG.md

@@ -14,6 +14,10 @@
 
 - Changed `read` tool rendering to collapse Pi documentation, AGENTS/CLAUDE context files, and `SKILL.md` contents by default in interactive output.
 
+### Fixed
+
+- Fixed OpenAI Codex WebSocket transport keeping `--print` and JSON mode processes alive after the response by closing cached WebSocket sessions during session shutdown ([#4103](https://github.com/badlogic/pi-mono/issues/4103)).
+
 ## [0.72.1] - 2026-05-02
 
 ## [0.72.0] - 2026-05-01

packages/coding-agent/src/core/agent-session.ts

@@ -31,6 +31,7 @@ import {
 	modelsAreEqual,
 	resetApiProviders,
 } from "@mariozechner/pi-ai";
+import { closeOpenAICodexWebSocketSessions } from "@mariozechner/pi-ai/openai-codex-responses";
 import { theme } from "../modes/interactive/theme/theme.js";
 import { stripFrontmatter } from "../utils/frontmatter.js";
 import { sleep } from "../utils/sleep.js";
@@ -752,6 +753,7 @@ export class AgentSession {
 		);
 		this._disconnectFromAgent();
 		this._eventListeners = [];
+		closeOpenAICodexWebSocketSessions(this.sessionId);
 	}
 
 	// =========================================================================