diff --git a/src/tui/mod.rs b/src/tui/mod.rs
new file mode 100644
index 0000000..99893ce
--- /dev/null
+++ b/src/tui/mod.rs
@@ -0,0 +1,545 @@
+use crossterm::{
+    event::{self, Event, KeyCode, KeyEventKind},
+    terminal::{disable_raw_mode, enable_raw_mode, Clear},
+    ExecutableCommand,
+};
+use ratatui::{
+    backend::CrosstermBackend,
+    layout::{Constraint, Direction, Layout, Rect},
+    style::{Color, Modifier, Style, Stylize},
+    text::{Line, Span, Text},
+    widgets::{
+        Block, Borders, Cell, Gauge, List, ListItem, Paragraph, Row, Table, Tabs, Widget,
+    },
+    Frame, Terminal,
+};
+use std::io::Stdout;
+use std::path::PathBuf;
+
+use crate::models::{AnalysisSummary, ByLanguage, ByPriority, Priority, TechDebtItem};
+
+mod app;
+pub use app::TuiApp;
+
+#[derive(Debug, Clone, PartialEq)]
+pub enum View {
+    Dashboard,
+    List,
+    Detail,
+    Export,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+enum SortOrder {
+    Priority,
+    File,
+    Line,
+    Keyword,
+}
+
+pub struct TuiState {
+    pub items: Vec<TechDebtItem>,
+    pub current_view: View,
+    pub selected_index: usize,
+    pub filter_text: String,
+    pub filter_priority: Option<Priority>,
+    pub sort_order: SortOrder,
+    pub show_help: bool,
+    pub path: PathBuf,
+}
+
+impl TuiState {
+    pub fn new(items: Vec<TechDebtItem>, path: PathBuf) -> Self {
+        Self {
+            items,
+            current_view: View::Dashboard,
+            selected_index: 0,
+            filter_text: String::new(),
+            filter_priority: None,
+            sort_order: SortOrder::Priority,
+            show_help: false,
+            path,
+        }
+    }
+
+    pub fn filtered_items(&self) -> Vec<&TechDebtItem> {
+        let mut items: Vec<&TechDebtItem> = self.items.iter().collect();
+
+        if !self.filter_text.is_empty() {
+            items.retain(|item| {
+                item.content.to_lowercase().contains(&self.filter_text.to_lowercase())
+                    || item
+                        .location
+                        .path
+                        .to_string_lossy()
+                        .to_lowercase()
+                        .contains(&self.filter_text.to_lowercase())
+            });
+        }
+
+        if let Some(priority) = self.filter_priority {
+            items.retain(|item| item.priority == priority);
+        }
+
+        match self.sort_order {
+            SortOrder::Priority => items.sort_by(|a, b| b.priority.cmp(&a.priority)),
+            SortOrder::File => items.sort_by(|a, b| {
+                a.location
+                    .path
+                    .cmp(&b.location.path)
+                    .then_with(|| a.location.line.cmp(&b.location.line))
+            }),
+            SortOrder::Line => items.sort_by(|a, b| a.location.line.cmp(&b.location.line)),
+            SortOrder::Keyword => items.sort_by(|a, b| a.keyword.cmp(&b.keyword)),
+        }
+
+        items
+    }
+
+    pub fn summary(&self) -> AnalysisSummary {
+        let by_priority = ByPriority::from_items(&self.items);
+        let by_language = ByLanguage::from_items(&self.items);
+        let complexity_distribution =
+            crate::models::ComplexityDistribution::from_items(&self.items);
+
+        AnalysisSummary {
+            total_items: self.items.len(),
+            by_priority,
+            by_language,
+            complexity_distribution,
+        }
+    }
+}
+
+fn draw_dashboard(f: &mut Frame<CrosstermBackend<Stdout>>, state: &TuiState, area: Rect) {
+    let summary = state.summary();
+
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(3),
+            Constraint::Min(10),
+            Constraint::Length(3),
+        ])
+        .split(area);
+
+    let title = Paragraph::new("TECHDEBT TRACKER - Dashboard")
+        .style(Style::default().fg(Color::Cyan).bold());
+    f.render_widget(title, chunks[0]);
+
+    let main_content = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Percentage(50), Constraint::Percentage(50)])
+        .split(chunks[1]);
+
+    let left_content = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(4),
+            Constraint::Length(4),
+            Constraint::Length(4),
+            Constraint::Min(0),
+        ])
+        .split(main_content[0]);
+
+    let right_content = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(4),
+            Constraint::Length(4),
+            Constraint::Min(0),
+        ])
+        .split(main_content[1]);
+
+    let priority_block = Block::default()
+        .title("Priority Breakdown")
+        .borders(Borders::ALL)
+        .style(Style::default().fg(Color::White));
+    f.render_widget(priority_block, left_content[0]);
+
+    let priority_content = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+            Constraint::Length(1),
+        ])
+        .split(left_content[0].inner);
+
+    let critical_gauge = Gauge::default()
+        .gauge_style(Style::default().fg(Color::Red))
+        .label(&format!("Critical: {}", summary.by_priority.critical))
+        .ratio(if summary.total_items > 0 {
+            summary.by_priority.critical as f64 / summary.total_items as f64
+        } else {
+            0.0
+        });
+    f.render_widget(critical_gauge, priority_content[0]);
+
+    let high_gauge = Gauge::default()
+        .gauge_style(Style::default().fg(Color::Yellow))
+        .label(&format!("High: {}", summary.by_priority.high))
+        .ratio(if summary.total_items > 0 {
+            summary.by_priority.high as f64 / summary.total_items as f64
+        } else {
+            0.0
+        });
+    f.render_widget(high_gauge, priority_content[1]);
+
+    let medium_gauge = Gauge::default()
+        .gauge_style(Style::default().fg(Color::Blue))
+        .label(&format!("Medium: {}", summary.by_priority.medium))
+        .ratio(if summary.total_items > 0 {
+            summary.by_priority.medium as f64 / summary.total_items as f64
+        } else {
+            0.0
+        });
+    f.render_widget(medium_gauge, priority_content[2]);
+
+    let low_gauge = Gauge::default()
+        .gauge_style(Style::default().fg(Color::Green))
+        .label(&format!("Low: {}", summary.by_priority.low))
+        .ratio(if summary.total_items > 0 {
+            summary.by_priority.low as f64 / summary.total_items as f64
+        } else {
+            0.0
+        });
+    f.render_widget(low_gauge, priority_content[3]);
+
+    let total_block = Block::default()
+        .title("Total Items")
+        .borders(Borders::ALL)
+        .style(Style::default().fg(Color::White));
+    f.render_widget(total_block, left_content[1]);
+    let total_text = Paragraph::new(format!("{}", summary.total_items))
+        .style(Style::default().fg(Color::Cyan).bold());
+    f.render_widget(total_text, left_content[1].inner);
+
+    let complexity_block = Block::default()
+        .title("Complexity Distribution")
+        .borders(Borders::ALL)
+        .style(Style::default().fg(Color::White));
+    f.render_widget(complexity_block, left_content[2]);
+    let complexity_text = format!(
+        "Low: {}  Medium: {}  High: {}  Critical: {}",
+        summary.complexity_distribution.low,
+        summary.complexity_distribution.medium,
+        summary.complexity_distribution.high,
+        summary.complexity_distribution.critical
+    );
+    let complexity_para = Paragraph::new(complexity_text);
+    f.render_widget(complexity_para, left_content[2].inner);
+
+    let language_block = Block::default()
+        .title("By Language")
+        .borders(Borders::ALL)
+        .style(Style::default().fg(Color::White));
+    f.render_widget(language_block, right_content[0]);
+
+    let lang_rows: Vec<Row> = summary
+        .by_language
+        .items
+        .iter()
+        .take(5)
+        .map(|lang| {
+            Row::new(vec![
+                Cell::from(lang.language.clone()),
+                Cell::from(lang.count.to_string()),
+            ])
+        })
+        .collect();
+
+    let lang_table = Table::new(lang_rows)
+        .widths(&[Constraint::Percentage(60), Constraint::Percentage(40)])
+        .column_spacing(1);
+    f.render_widget(lang_table, right_content[0].inner);
+
+    let help_block = Block::default()
+        .title("Navigation Help")
+        .borders(Borders::ALL)
+        .style(Style::default().fg(Color::White));
+    f.render_widget(help_block, right_content[1]);
+    let help_text = "↑↓: Navigate | Tab: Switch View | q: Quit | /: Filter";
+    let help_para = Paragraph::new(help_text);
+    f.render_widget(help_para, right_content[1].inner);
+
+    let status_bar = Line::from(vec![
+        Span::styled(" Press ", Style::default().fg(Color::Gray)),
+        Span::styled("TAB", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(" to view items | ", Style::default().fg(Color::Gray)),
+        Span::styled("q", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(" to quit", Style::default().fg(Color::Gray)),
+    ]);
+    f.render_widget(status_bar, chunks[2]);
+}
+
+fn draw_list(f: &mut Frame<CrosstermBackend<Stdout>>, state: &TuiState, area: Rect) {
+    let filtered = state.filtered_items();
+
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(3),
+            Constraint::Min(10),
+            Constraint::Length(3),
+        ])
+        .split(area);
+
+    let filter_text = if state.filter_text.is_empty() {
+        format!("Filter ({} items) - Press / to filter", filtered.len())
+    } else {
+        format!(
+            "Filter: {} - {} results (Press / to edit, ESC to clear)",
+            state.filter_text,
+            filtered.len()
+        )
+    };
+    let filter_block = Paragraph::new(filter_text)
+        .style(Style::default().fg(Color::Yellow));
+    f.render_widget(filter_block, chunks[0]);
+
+    let list_items: Vec<ListItem> = filtered
+        .iter()
+        .enumerate()
+        .skip(state.selected_index.saturating_sub(10))
+        .take(chunks[1].height as usize - 2)
+        .map(|(idx, item)| {
+            let priority_color = match item.priority {
+                Priority::Critical => Color::Red,
+                Priority::High => Color::Yellow,
+                Priority::Medium => Color::Blue,
+                Priority::Low => Color::Green,
+            };
+
+            let content = format!(
+                "[{}] {}:{} - {} ({}/10) - {}",
+                item.keyword,
+                item.location.path.file_name().unwrap_or_default().to_string_lossy(),
+                item.location.line,
+                item.content.chars().take(40).collect::<String>(),
+                item.complexity_score,
+                item.metadata.language
+            );
+
+            let style = if *idx == state.selected_index {
+                Style::default()
+                    .fg(priority_color)
+                    .bg(Color::DarkGray)
+                    .add_modifier(Modifier::BOLD)
+            } else {
+                Style::default().fg(priority_color)
+            };
+
+            ListItem::new(content).style(style)
+        })
+        .collect();
+
+    let list = List::new(list_items).block(
+        Block::default()
+            .title(format!("Items ({})", filtered.len()))
+            .borders(Borders::ALL),
+    );
+    f.render_widget(list, chunks[1]);
+
+    let status_bar = Line::from(vec![
+        Span::styled(" ↑↓: Navigate | ", Style::default().fg(Color::Gray)),
+        Span::styled("ENTER", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": View Detail | ", Style::default().fg(Color::Gray)),
+        Span::styled("TAB", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Dashboard | ", Style::default().fg(Color::Gray)),
+        Span::styled("f", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Filter | ", Style::default().fg(Color::Gray)),
+        Span::styled("s", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Sort | ", Style::default().fg(Color::Gray)),
+        Span::styled("q", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Quit", Style::default().fg(Color::Gray)),
+    ]);
+    f.render_widget(status_bar, chunks[2]);
+}
+
+fn draw_detail(f: &mut Frame<CrosstermBackend<Stdout>>, state: &TuiState, area: Rect) {
+    let filtered = state.filtered_items();
+
+    if filtered.is_empty() {
+        let para = Paragraph::new("No items selected");
+        f.render_widget(para, area);
+        return;
+    }
+
+    let item = if let Some(item) = filtered.get(state.selected_index) {
+        item
+    } else {
+        state.selected_index = 0;
+        if let Some(item) = filtered.get(0) {
+            item
+        } else {
+            return;
+        }
+    };
+
+    let chunks = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(3),
+            Constraint::Min(5),
+            Constraint::Length(3),
+        ])
+        .split(area);
+
+    let title = format!(
+        "Detail - {} at {}:{}",
+        item.keyword,
+        item.location.path.display(),
+        item.location.line
+    );
+    let title_block = Paragraph::new(title)
+        .style(Style::default().fg(Color::Cyan).bold());
+    f.render_widget(title_block, chunks[0]);
+
+    let detail_chunks = Layout::default()
+        .direction(Direction::Horizontal)
+        .constraints([Constraint::Percentage(50), Constraint::Percentage(50)])
+        .split(chunks[1]);
+
+    let left_details = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(2),
+            Constraint::Length(2),
+            Constraint::Length(2),
+            Constraint::Length(2),
+            Constraint::Min(0),
+        ])
+        .split(detail_chunks[0]);
+
+    let priority_color = match item.priority {
+        Priority::Critical => Color::Red,
+        Priority::High => Color::Yellow,
+        Priority::Medium => Color::Blue,
+        Priority::Low => Color::Green,
+    };
+
+    let priority_line = Line::from(vec![
+        Span::styled("Priority: ", Style::default().fg(Color::Gray)),
+        Span::styled(item.priority.as_str(), Style::default().fg(priority_color).bold()),
+    ]);
+    f.render_widget(priority_line, left_details[0]);
+
+    let complexity_line = Line::from(vec![
+        Span::styled("Complexity: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            format!("{}/10", item.complexity_score),
+            Style::default()
+                .fg(match item.complexity_score {
+                    1..=3 => Color::Green,
+                    4..=6 => Color::Yellow,
+                    7..=8 => Color::Red,
+                    _ => Color::Magenta,
+                })
+                .bold(),
+        ),
+    ]);
+    f.render_widget(complexity_line, left_details[1]);
+
+    let language_line = Line::from(vec![
+        Span::styled("Language: ", Style::default().fg(Color::Gray)),
+        Span::styled(&item.metadata.language, Style::default().fg(Color::Cyan)),
+    ]);
+    f.render_widget(language_line, left_details[2]);
+
+    let type_line = Line::from(vec![
+        Span::styled("Type: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            format!("{:?}", item.comment_type),
+            Style::default().fg(Color::Blue),
+        ),
+    ]);
+    f.render_widget(type_line, left_details[3]);
+
+    let content_block = Block::default().title("Content").borders(Borders::ALL);
+    f.render_widget(content_block, left_details[4]);
+    let content_para = Paragraph::new(&item.content)
+        .wrap(ratatui::text::Wrap { trim: true });
+    f.render_widget(content_para, left_details[4].inner);
+
+    let right_details = Layout::default()
+        .direction(Direction::Vertical)
+        .constraints([
+            Constraint::Length(2),
+            Constraint::Length(2),
+            Constraint::Length(2),
+            Constraint::Min(0),
+        ])
+        .split(detail_chunks[1]);
+
+    let path_line = Line::from(vec![
+        Span::styled("File: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            item.location.path.display().to_string(),
+            Style::default().fg(Color::White),
+        ),
+    ]);
+    f.render_widget(path_line, right_details[0]);
+
+    let location_line = Line::from(vec![
+        Span::styled("Line: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            item.location.line.to_string(),
+            Style::default().fg(Color::White),
+        ),
+        Span::styled(" | Column: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            item.location.column.to_string(),
+            Style::default().fg(Color::White),
+        ),
+    ]);
+    f.render_widget(location_line, right_details[1]);
+
+    let question_line = Line::from(vec![
+        Span::styled("Contains Question: ", Style::default().fg(Color::Gray)),
+        Span::styled(
+            if item.metadata.is_question { "Yes" } else { "No" },
+            Style::default().fg(if item.metadata.is_question {
+                Color::Yellow
+            } else {
+                Color::Green
+            }),
+        ),
+    ]);
+    f.render_widget(question_line, right_details[2]);
+
+    let word_count_line = Line::from(vec![
+        Span::styled("Word Count: ", Style::default().fg(Color::Gray)),
+        Span::styled(item.metadata.word_count.to_string(), Style::default().fg(Color::White)),
+    ]);
+    f.render_widget(word_count_line, right_details[3]);
+
+    let status_bar = Line::from(vec![
+        Span::styled(" ←: Back | ", Style::default().fg(Color::Gray)),
+        Span::styled("e", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Export | ", Style::default().fg(Color::Gray)),
+        Span::styled("q", Style::default().fg(Color::Yellow).bold()),
+        Span::styled(": Quit", Style::default().fg(Color::Gray)),
+    ]);
+    f.render_widget(status_bar, chunks[2]);
+}
+
+pub fn render(f: &mut Frame<CrosstermBackend<Stdout>>, state: &TuiState) {
+    let area = f.size();
+
+    let block = Block::default()
+        .style(Style::default().bg(Color::Black))
+        .borders(Borders::NONE);
+    f.render_widget(block, area);
+
+    match state.current_view {
+        View::Dashboard => draw_dashboard(f, state, area),
+        View::List => draw_list(f, state, area),
+        View::Detail => draw_detail(f, state, area),
+        View::Export => {
+            let para = Paragraph::new("Export feature - Coming soon!");
+            f.render_widget(para, area);
+        }
+    }
+}