diff --git a/.termflow/commands/visualize.py b/.termflow/commands/visualize.py
new file mode 100644
index 0000000..d6c3a87
--- /dev/null
+++ b/.termflow/commands/visualize.py
@@ -0,0 +1,186 @@
+"""Visualize command for CLI."""
+
+from pathlib import Path
+from typing import Optional
+
+import click
+from rich.console import Console
+from rich.panel import Panel
+from rich.text import Text
+
+from ..core.database import SessionDatabase
+from ..core.session import Session
+from ..parsers.git_parser import GitLogParser
+from ..parsers.pattern_analyzer import PatternDetector, SequenceAnalyzer
+from ..exporters.ascii_generator import ASCIIGenerator, GitGraphGenerator
+from ..exporters.mermaid_generator import MermaidGenerator
+
+console = Console()
+
+
+@click.command(name="visualize")
+@click.argument("source", type=str)
+@click.option(
+    "--session-id",
+    "-s",
+    type=int,
+    help="Session ID to visualize",
+)
+@click.option(
+    "--style",
+    "visual_style",
+    type=click.Choice(["compact", "detailed", "minimal"]),
+    default="detailed",
+    help="Visualization style",
+)
+@click.option(
+    "--format",
+    "-f",
+    type=click.Choice(["ascii", "mermaid"]),
+    default="ascii",
+    help="Output format",
+)
+@click.option(
+    "--output",
+    "-o",
+    type=click.Path(path_type=Path),
+    help="Output file",
+)
+@click.option(
+    "--analyze/--no-analyze",
+    default=True,
+    help="Include pattern analysis",
+)
+@click.pass_context
+def visualize_cmd(
+    ctx: click.Context,
+    source: str,
+    session_id: Optional[int],
+    visual_style: str,
+    format: str,
+    output: Optional[Path],
+    analyze: bool,
+) -> None:
+    """Visualize a session or git workflow."""
+    db_path = ctx.obj.get("db", Path.home() / ".termflow" / "sessions.db")
+
+    if source == "session":
+        _visualize_session(
+            db_path,
+            session_id,
+            visual_style,
+            format,
+            output,
+            analyze,
+        )
+    elif source == "git":
+        _visualize_git(
+            Path.cwd(),
+            visual_style,
+            format,
+            output,
+        )
+    else:
+        console.print(f"[red]Unknown source: {source}[/red]")
+        console.print("Use 'session' or 'git' as source")
+
+
+def _visualize_session(
+    db_path: Path,
+    session_id: Optional[int],
+    style: str,
+    format: str,
+    output: Optional[Path],
+    analyze: bool,
+) -> None:
+    """Visualize a terminal session."""
+    db = SessionDatabase(db_path)
+
+    if session_id is None:
+        sessions = db.get_all_sessions()
+        if not sessions:
+            console.print("[yellow]No sessions found[/yellow]")
+            return
+        session_id = sessions[0]["id"]
+
+    session = db.get_session(session_id)
+    if not session:
+        console.print(f"[red]Session {session_id} not found[/red]")
+        return
+
+    commands = db.get_session_commands(session_id)
+    command_list = [cmd.get("command", "") for cmd in commands]
+
+    if analyze:
+        detector = PatternDetector()
+        patterns = detector.analyze_commands(command_list)
+
+        if patterns:
+            text = Text()
+            text.append(f"Found {len(patterns)} patterns:\n", style="bold")
+            for i, pattern in enumerate(patterns[:5], 1):
+                text.append(f"  {i}. {pattern.commands} (x{pattern.frequency})\n")
+            console.print(Panel(text, title="Pattern Analysis"))
+
+    metadata = {
+        "title": f"Session: {session.get('name', 'Unknown')}",
+        "command_count": len(command_list),
+        "session_name": session.get("name", ""),
+    }
+
+    if format == "ascii":
+        ascii_gen = ASCIIGenerator(style=style)
+        result = ascii_gen.generate_from_commands(command_list, metadata)
+    else:
+        mermaid_gen = MermaidGenerator()
+        result = mermaid_gen.generate_flowchart(
+            command_list,
+            title=f"Session: {session.get('name', 'Unknown')}",
+            metadata=metadata,
+        )
+
+    if output:
+        with open(output, "w") as f:
+            f.write(result)
+        console.print(f"[cyan]Visualization saved to {output}[/cyan]")
+    else:
+        console.print(Panel(result, title=f"Session Flow: {session.get('name', 'Unknown')}"))
+
+
+def _visualize_git(
+    repo_path: Path,
+    style: str,
+    format: str,
+    output: Optional[Path],
+) -> None:
+    """Visualize git workflow."""
+    parser = GitLogParser(repo_path)
+
+    if not parser.is_git_repo():
+        console.print("[red]Not a git repository[/red]")
+        return
+
+    commits = parser.parse_log(max_count=50)
+    parser.get_commit_parents()
+    workflow = parser.analyze_workflow()
+
+    if format == "ascii":
+        graph_gen = GitGraphGenerator()
+        result = graph_gen.generate_from_parser(parser)
+    else:
+        mermaid_gen = MermaidGenerator()
+        result = mermaid_gen.generate_git_graph_from_parser(parser)
+
+    stats_text = Text()
+    stats_text.append(f"Commits: {len(commits)}\n", style="bold")
+    stats_text.append(f"Merges: {workflow.merge_count}\n")
+    stats_text.append(f"Features: {workflow.feature_count}\n")
+    stats_text.append(f"Branches: {len(workflow.branches)}")
+
+    if output:
+        with open(output, "w") as f:
+            f.write(result)
+        console.print(f"[cyan]Visualization saved to {output}[/cyan]")
+    else:
+        console.print(Panel(result, title="Git Workflow"))
+        console.print(Panel(stats_text, title="Statistics"))