Phase 1: Repository & Infrastructure Setup

- Renamed directories: codex-rs -> llmx-rs, codex-cli -> llmx-cli
- Updated package.json files:
  - Root: llmx-monorepo
  - CLI: @llmx/llmx
  - SDK: @llmx/llmx-sdk
- Updated pnpm workspace configuration
- Renamed binary: codex.js -> llmx.js
- Updated environment variables: CODEX_* -> LLMX_*
- Changed repository URLs to valknar/llmx

🤖 Generated with Claude Code

llmx-rs/exec/tests/suite/server_error_exit.rs

@@ -0,0 +1,34 @@
+#![cfg(not(target_os = "windows"))]
+#![allow(clippy::expect_used, clippy::unwrap_used)]
+
+use core_test_support::responses;
+use core_test_support::test_codex_exec::test_codex_exec;
+use wiremock::matchers::any;
+
+/// Verify that when the server reports an error, `codex-exec` exits with a
+/// non-zero status code so automation can detect failures.
+#[tokio::test(flavor = "multi_thread", worker_threads = 2)]
+async fn exits_non_zero_when_server_reports_error() -> anyhow::Result<()> {
+    let test = test_codex_exec();
+
+    // Mock a simple Responses API SSE stream that immediately reports a
+    // `response.failed` event with an error message.
+    let server = responses::start_mock_server().await;
+    let body = responses::sse(vec![serde_json::json!({
+        "type": "response.failed",
+        "response": {
+            "id": "resp_err_1",
+            "error": {"code": "rate_limit_exceeded", "message": "synthetic server error"}
+        }
+    })]);
+    responses::mount_sse_once_match(&server, any(), body).await;
+
+    test.cmd_with_server(&server)
+        .arg("--skip-git-repo-check")
+        .arg("tell me something")
+        .arg("--experimental-json")
+        .assert()
+        .code(1);
+
+    Ok(())
+}