diff --git a/.gitignore b/.gitignore
index 587821670..086b82ecc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 /.bundle
 /Cargo.lock
 /target
-/tmp
+/ruby/tmp
 /ruby/LICENSE
 /ruby/VERSION
diff --git a/manager/Cargo.toml b/manager/Cargo.toml
index 8e34d1eaa..8c44cf6a0 100644
--- a/manager/Cargo.toml
+++ b/manager/Cargo.toml
@@ -12,4 +12,4 @@ path = "src/main.rs"
 
 [dependencies]
 clap = { version = "4.5", features = ["derive"] }
-toml = "0.8"
+ratatui = "0.29"
diff --git a/manager/src/check.rs b/manager/src/check.rs
new file mode 100644
index 000000000..732c65692
--- /dev/null
+++ b/manager/src/check.rs
@@ -0,0 +1,284 @@
+use crate::tasks;
+use ratatui::{
+    TerminalOptions, Viewport,
+    crossterm::{
+        ExecutableCommand, cursor,
+        event::{self, Event, KeyCode, KeyEventKind},
+        terminal::{disable_raw_mode, enable_raw_mode},
+    },
+    prelude::*,
+    widgets::{Cell, Row, Table},
+};
+use std::{
+    io::{BufRead, BufReader, stdout},
+    process::{Child, Command, Stdio},
+    sync::{Arc, Mutex},
+    thread,
+    time::Duration,
+};
+
+#[derive(Clone, PartialEq)]
+enum TaskStatus {
+    Pending,
+    Running,
+    Success,
+    Failed,
+}
+
+#[derive(Clone)]
+struct TaskState {
+    status: TaskStatus,
+    last_line: String,
+    full_output: Vec<String>,
+}
+
+impl Default for TaskState {
+    fn default() -> Self {
+        Self {
+            status: TaskStatus::Pending,
+            last_line: String::new(),
+            full_output: Vec::new(),
+        }
+    }
+}
+
+struct AppState {
+    tasks: Vec<TaskState>,
+}
+
+pub fn run() {
+    crate::prepare();
+
+    let state = Arc::new(Mutex::new(AppState {
+        tasks: vec![TaskState::default(); tasks::ALL.len()],
+    }));
+
+    let mut handles: Vec<thread::JoinHandle<()>> = Vec::new();
+    let mut children: Vec<Arc<Mutex<Option<Child>>>> = Vec::new();
+
+    for (index, task) in tasks::ALL.iter().enumerate() {
+        let state = Arc::clone(&state);
+        let child_holder: Arc<Mutex<Option<Child>>> = Arc::new(Mutex::new(None));
+        let child_holder_clone = Arc::clone(&child_holder);
+        children.push(child_holder);
+
+        let args: Vec<&'static str> = task.args.to_vec();
+
+        let handle = thread::spawn(move || {
+            run_task(index, &args, state, child_holder_clone);
+        });
+        handles.push(handle);
+    }
+
+    if let Err(error) = run_tui(Arc::clone(&state)) {
+        eprintln!("TUI error: {}", error);
+    }
+
+    for child_holder in &children {
+        if let Some(ref mut child) = *child_holder.lock().unwrap() {
+            let _ = child.kill();
+        }
+    }
+
+    for handle in handles {
+        let _ = handle.join();
+    }
+
+    let final_state = state.lock().unwrap();
+    let failed_tasks: Vec<_> = tasks::ALL
+        .iter()
+        .zip(final_state.tasks.iter())
+        .filter(|(_, task_state)| task_state.status == TaskStatus::Failed)
+        .collect();
+
+    if !failed_tasks.is_empty() {
+        println!("\n\x1b[1;31m=== Failed Tasks ===\x1b[0m\n");
+        for (task, task_state) in failed_tasks {
+            println!("\x1b[1;31m--- {} ---\x1b[0m", task.name);
+            for line in &task_state.full_output {
+                println!("{}", line);
+            }
+            println!();
+        }
+    }
+
+    let failed = final_state
+        .tasks
+        .iter()
+        .any(|t| t.status == TaskStatus::Failed);
+
+    std::process::exit(if failed { 1 } else { 0 });
+}
+
+fn run_task(
+    index: usize,
+    args: &[&str],
+    state: Arc<Mutex<AppState>>,
+    child_holder: Arc<Mutex<Option<Child>>>,
+) {
+    {
+        let mut state = state.lock().unwrap();
+        state.tasks[index].status = TaskStatus::Running;
+    }
+
+    let mut child = match Command::new("bundle")
+        .arg("exec")
+        .args(args)
+        .current_dir("ruby")
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()
+    {
+        Ok(child) => child,
+        Err(error) => {
+            let mut state = state.lock().unwrap();
+            state.tasks[index].status = TaskStatus::Failed;
+            state.tasks[index].last_line = format!("Failed to spawn: {}", error);
+            return;
+        }
+    };
+
+    let stdout = child.stdout.take();
+    let stderr = child.stderr.take();
+
+    *child_holder.lock().unwrap() = Some(child);
+
+    let state_clone = Arc::clone(&state);
+    let stdout_handle = stdout.map(|out| {
+        let state = Arc::clone(&state_clone);
+        thread::spawn(move || {
+            let reader = BufReader::new(out);
+            for line in reader.lines().map_while(Result::ok) {
+                let mut state = state.lock().unwrap();
+                state.tasks[index].last_line = line.clone();
+                state.tasks[index].full_output.push(line);
+            }
+        })
+    });
+
+    let stderr_handle = stderr.map(|err| {
+        let state = Arc::clone(&state);
+        thread::spawn(move || {
+            let reader = BufReader::new(err);
+            for line in reader.lines().map_while(Result::ok) {
+                let mut state = state.lock().unwrap();
+                state.tasks[index].last_line = line.clone();
+                state.tasks[index].full_output.push(line);
+            }
+        })
+    });
+
+    if let Some(handle) = stdout_handle {
+        let _ = handle.join();
+    }
+    if let Some(handle) = stderr_handle {
+        let _ = handle.join();
+    }
+
+    let exit_status = child_holder
+        .lock()
+        .unwrap()
+        .as_mut()
+        .and_then(|c| c.wait().ok());
+
+    let mut state = state.lock().unwrap();
+    state.tasks[index].status = match exit_status {
+        Some(status) if status.success() => TaskStatus::Success,
+        _ => TaskStatus::Failed,
+    };
+}
+
+fn run_tui(state: Arc<Mutex<AppState>>) -> std::io::Result<()> {
+    let num_lines = tasks::ALL.len() as u16 + 2; // +2 for header and spacing
+
+    // Reserve space for our output
+    for _ in 0..num_lines {
+        println!();
+    }
+    stdout().execute(cursor::MoveUp(num_lines))?;
+    stdout().execute(cursor::SavePosition)?;
+
+    enable_raw_mode()?;
+
+    let mut terminal = Terminal::with_options(
+        CrosstermBackend::new(stdout()),
+        TerminalOptions {
+            viewport: Viewport::Inline(num_lines),
+        },
+    )?;
+
+    loop {
+        terminal.draw(|frame| {
+            let state = state.lock().unwrap();
+            render(frame, &state);
+        })?;
+
+        if event::poll(Duration::from_millis(100))?
+            && let Event::Key(key) = event::read()?
+            && key.kind == KeyEventKind::Press
+            && key.code == KeyCode::Char('q')
+        {
+            break;
+        }
+
+        let state = state.lock().unwrap();
+        let all_done = state
+            .tasks
+            .iter()
+            .all(|t| t.status == TaskStatus::Success || t.status == TaskStatus::Failed);
+        if all_done {
+            drop(state);
+            thread::sleep(Duration::from_secs(1));
+            break;
+        }
+    }
+
+    disable_raw_mode()?;
+    stdout().execute(cursor::MoveDown(num_lines))?;
+    println!();
+
+    Ok(())
+}
+
+fn render(frame: &mut Frame, state: &AppState) {
+    let rows: Vec<Row> = tasks::ALL
+        .iter()
+        .zip(state.tasks.iter())
+        .map(|(task, task_state)| {
+            let status = match task_state.status {
+                TaskStatus::Pending => ("⏳", Style::default().fg(Color::Gray)),
+                TaskStatus::Running => ("🔄", Style::default().fg(Color::Yellow)),
+                TaskStatus::Success => ("✓", Style::default().fg(Color::Green)),
+                TaskStatus::Failed => ("✗", Style::default().fg(Color::Red)),
+            };
+
+            Row::new(vec![
+                Cell::from(status.0).style(status.1),
+                Cell::from(task.name),
+                Cell::from(truncate_line(&task_state.last_line, 80)),
+            ])
+        })
+        .collect();
+
+    let widths = [
+        Constraint::Length(3),
+        Constraint::Length(28),
+        Constraint::Fill(1),
+    ];
+
+    let table = Table::new(rows, widths).header(
+        Row::new(vec!["", "Task", "Output"])
+            .style(Style::default().bold())
+            .bottom_margin(1),
+    );
+
+    frame.render_widget(table, frame.area());
+}
+
+fn truncate_line(line: &str, max_len: usize) -> String {
+    if line.len() > max_len {
+        format!("{}...", &line[..max_len - 3])
+    } else {
+        line.to_string()
+    }
+}
diff --git a/manager/src/main.rs b/manager/src/main.rs
index b331131aa..ac1b7d3a4 100644
--- a/manager/src/main.rs
+++ b/manager/src/main.rs
@@ -3,6 +3,9 @@ use std::fs;
 use std::os::unix::process::CommandExt;
 use std::process::Command;
 
+mod check;
+mod tasks;
+
 #[derive(Parser)]
 #[command(name = "manager")]
 #[command(about = "Mutant development manager")]
@@ -13,6 +16,8 @@ struct Cli {
 
 #[derive(Subcommand)]
 enum Commands {
+    /// Run all checks in parallel with TUI
+    Check,
     /// Execute commands in Ruby environment
     Ruby {
         #[command(subcommand)]
@@ -94,53 +99,38 @@ fn main() {
     let cli = Cli::parse();
 
     match cli.command {
+        Commands::Check => check::run(),
         Commands::Ruby { action } => {
             prepare();
             match action {
                 Ruby::Prepare => {}
                 Ruby::Exec { arguments } => bundle_exec(&arguments),
                 Ruby::Rspec { action } => match action {
-                    Rspec::SpecUnit { arguments } => {
-                        bundle_exec_with_args(&["rspec", "spec/unit"], &arguments)
+                    Rspec::SpecUnit { arguments } => run_task(&tasks::RSPEC_SPEC_UNIT, &arguments),
+                    Rspec::IntegrationMisc { arguments } => {
+                        run_task(&tasks::RSPEC_INTEGRATION_MISC, &arguments)
                     }
-                    Rspec::IntegrationMisc { arguments } => bundle_exec_with_args(
-                        &[
-                            "rspec",
-                            "spec/integration/mutant/null_spec.rb",
-                            "spec/integration/mutant/isolation/fork_spec.rb",
-                            "spec/integration/mutant/test_mutator_handles_types_spec.rb",
-                            "spec/integration/mutant/parallel_spec.rb",
-                        ],
-                        &arguments,
-                    ),
-                    Rspec::IntegrationMinitest { arguments } => bundle_exec_with_args(
-                        &["rspec", "spec/integration", "-e", "minitest"],
-                        &arguments,
-                    ),
-                    Rspec::IntegrationRspec { arguments } => bundle_exec_with_args(
-                        &["rspec", "spec/integration", "-e", "rspec"],
-                        &arguments,
-                    ),
-                    Rspec::IntegrationGeneration { arguments } => bundle_exec_with_args(
-                        &["rspec", "spec/integration", "-e", "generation"],
-                        &arguments,
-                    ),
-                },
-                Ruby::Mutant { action } => match action {
-                    Mutant::Test { arguments } => {
-                        bundle_exec_with_args(&["mutant", "test", "spec/unit"], &arguments)
+                    Rspec::IntegrationMinitest { arguments } => {
+                        run_task(&tasks::RSPEC_INTEGRATION_MINITEST, &arguments)
                     }
-                    Mutant::Run { arguments } => {
-                        bundle_exec_with_args(&["mutant", "run"], &arguments)
+                    Rspec::IntegrationRspec { arguments } => {
+                        run_task(&tasks::RSPEC_INTEGRATION_RSPEC, &arguments)
                     }
+                    Rspec::IntegrationGeneration { arguments } => {
+                        run_task(&tasks::RSPEC_INTEGRATION_GENERATION, &arguments)
+                    }
+                },
+                Ruby::Mutant { action } => match action {
+                    Mutant::Test { arguments } => run_task(&tasks::MUTANT_TEST, &arguments),
+                    Mutant::Run { arguments } => run_task(&tasks::MUTANT_RUN, &arguments),
                 },
-                Ruby::Rubocop { arguments } => bundle_exec_with_args(&["rubocop"], &arguments),
+                Ruby::Rubocop { arguments } => run_task(&tasks::RUBOCOP, &arguments),
             }
         }
     }
 }
 
-fn prepare() {
+pub fn prepare() {
     fs::write("ruby/VERSION", format!("{}\n", env!("CARGO_PKG_VERSION"))).unwrap_or_else(|error| {
         panic!("Failed to write ruby/VERSION: {}", error);
     });
@@ -150,8 +140,8 @@ fn prepare() {
     });
 }
 
-fn bundle_exec_with_args(base_args: &[&str], extra_args: &[String]) {
-    let mut args: Vec<&str> = base_args.to_vec();
+fn run_task(task: &tasks::Task, extra_args: &[String]) {
+    let mut args: Vec<&str> = task.args.to_vec();
     args.extend(extra_args.iter().map(|s| s.as_str()));
     bundle_exec(&args)
 }
diff --git a/manager/src/tasks.rs b/manager/src/tasks.rs
new file mode 100644
index 000000000..bd543b73a
--- /dev/null
+++ b/manager/src/tasks.rs
@@ -0,0 +1,60 @@
+pub struct Task {
+    pub name: &'static str,
+    pub args: &'static [&'static str],
+}
+
+pub const RSPEC_SPEC_UNIT: Task = Task {
+    name: "rspec spec-unit",
+    args: &["rspec", "spec/unit"],
+};
+
+pub const MUTANT_TEST: Task = Task {
+    name: "mutant test",
+    args: &["mutant", "test", "spec/unit"],
+};
+
+pub const MUTANT_RUN: Task = Task {
+    name: "mutant run",
+    args: &["mutant", "run"],
+};
+
+pub const RSPEC_INTEGRATION_MISC: Task = Task {
+    name: "rspec integration-misc",
+    args: &[
+        "rspec",
+        "spec/integration/mutant/null_spec.rb",
+        "spec/integration/mutant/isolation/fork_spec.rb",
+        "spec/integration/mutant/test_mutator_handles_types_spec.rb",
+        "spec/integration/mutant/parallel_spec.rb",
+    ],
+};
+
+pub const RSPEC_INTEGRATION_MINITEST: Task = Task {
+    name: "rspec integration-minitest",
+    args: &["rspec", "spec/integration", "-e", "minitest"],
+};
+
+pub const RSPEC_INTEGRATION_RSPEC: Task = Task {
+    name: "rspec integration-rspec",
+    args: &["rspec", "spec/integration", "-e", "rspec"],
+};
+
+pub const RSPEC_INTEGRATION_GENERATION: Task = Task {
+    name: "rspec integration-generation",
+    args: &["rspec", "spec/integration", "-e", "generation"],
+};
+
+pub const RUBOCOP: Task = Task {
+    name: "rubocop",
+    args: &["rubocop"],
+};
+
+pub const ALL: &[&Task] = &[
+    &RSPEC_SPEC_UNIT,
+    &MUTANT_TEST,
+    &RSPEC_INTEGRATION_MISC,
+    &RSPEC_INTEGRATION_MINITEST,
+    &RSPEC_INTEGRATION_RSPEC,
+    &RSPEC_INTEGRATION_GENERATION,
+    &RUBOCOP,
+];