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/core/tests/suite/exec.rs

@@ -0,0 +1,127 @@
+#![cfg(target_os = "macos")]
+
+use std::collections::HashMap;
+use std::string::ToString;
+
+use codex_core::exec::ExecParams;
+use codex_core::exec::ExecToolCallOutput;
+use codex_core::exec::SandboxType;
+use codex_core::exec::process_exec_tool_call;
+use codex_core::protocol::SandboxPolicy;
+use codex_core::spawn::CODEX_SANDBOX_ENV_VAR;
+use tempfile::TempDir;
+
+use codex_core::error::Result;
+
+use codex_core::get_platform_sandbox;
+
+fn skip_test() -> bool {
+    if std::env::var(CODEX_SANDBOX_ENV_VAR) == Ok("seatbelt".to_string()) {
+        eprintln!("{CODEX_SANDBOX_ENV_VAR} is set to 'seatbelt', skipping test.");
+        return true;
+    }
+
+    false
+}
+
+#[expect(clippy::expect_used)]
+async fn run_test_cmd(tmp: TempDir, cmd: Vec<&str>) -> Result<ExecToolCallOutput> {
+    let sandbox_type = get_platform_sandbox().expect("should be able to get sandbox type");
+    assert_eq!(sandbox_type, SandboxType::MacosSeatbelt);
+
+    let params = ExecParams {
+        command: cmd.iter().map(ToString::to_string).collect(),
+        cwd: tmp.path().to_path_buf(),
+        timeout_ms: Some(1000),
+        env: HashMap::new(),
+        with_escalated_permissions: None,
+        justification: None,
+        arg0: None,
+    };
+
+    let policy = SandboxPolicy::new_read_only_policy();
+
+    process_exec_tool_call(params, sandbox_type, &policy, tmp.path(), &None, None).await
+}
+
+/// Command succeeds with exit code 0 normally
+#[tokio::test]
+async fn exit_code_0_succeeds() {
+    if skip_test() {
+        return;
+    }
+
+    let tmp = TempDir::new().expect("should be able to create temp dir");
+    let cmd = vec!["echo", "hello"];
+
+    let output = run_test_cmd(tmp, cmd).await.unwrap();
+    assert_eq!(output.stdout.text, "hello\n");
+    assert_eq!(output.stderr.text, "");
+    assert_eq!(output.stdout.truncated_after_lines, None);
+}
+
+/// Command succeeds with exit code 0 normally
+#[tokio::test]
+async fn truncates_output_lines() {
+    if skip_test() {
+        return;
+    }
+
+    let tmp = TempDir::new().expect("should be able to create temp dir");
+    let cmd = vec!["seq", "300"];
+
+    let output = run_test_cmd(tmp, cmd).await.unwrap();
+
+    let expected_output = (1..=300)
+        .map(|i| format!("{i}\n"))
+        .collect::<Vec<_>>()
+        .join("");
+    assert_eq!(output.stdout.text, expected_output);
+    assert_eq!(output.stdout.truncated_after_lines, None);
+}
+
+/// Command succeeds with exit code 0 normally
+#[tokio::test]
+async fn truncates_output_bytes() {
+    if skip_test() {
+        return;
+    }
+
+    let tmp = TempDir::new().expect("should be able to create temp dir");
+    // each line is 1000 bytes
+    let cmd = vec!["bash", "-lc", "seq 15 | awk '{printf \"%-1000s\\n\", $0}'"];
+
+    let output = run_test_cmd(tmp, cmd).await.unwrap();
+
+    assert!(output.stdout.text.len() >= 15000);
+    assert_eq!(output.stdout.truncated_after_lines, None);
+}
+
+/// Command not found returns exit code 127, this is not considered a sandbox error
+#[tokio::test]
+async fn exit_command_not_found_is_ok() {
+    if skip_test() {
+        return;
+    }
+
+    let tmp = TempDir::new().expect("should be able to create temp dir");
+    let cmd = vec!["/bin/bash", "-c", "nonexistent_command_12345"];
+    run_test_cmd(tmp, cmd).await.unwrap();
+}
+
+/// Writing a file fails and should be considered a sandbox error
+#[tokio::test]
+async fn write_file_fails_as_sandbox_error() {
+    if skip_test() {
+        return;
+    }
+
+    let tmp = TempDir::new().expect("should be able to create temp dir");
+    let path = tmp.path().join("test.txt");
+    let cmd = vec![
+        "/user/bin/touch",
+        path.to_str().expect("should be able to get path"),
+    ];
+
+    assert!(run_test_cmd(tmp, cmd).await.is_err());
+}