diff --git a/i18n_guardian/cli.py b/i18n_guardian/cli.py
new file mode 100644
index 0000000..9df78db
--- /dev/null
+++ b/i18n_guardian/cli.py
@@ -0,0 +1,158 @@
+"""CLI module for i18n-guardian."""
+import os
+from typing import Optional
+
+import click
+
+from i18n_guardian.config import ConfigLoader
+from i18n_guardian.version import __version__
+
+
+@click.group()
+@click.option(
+    "--config",
+    "-c",
+    type=click.Path(exists=True),
+    help="Path to configuration file",
+)
+@click.option(
+    "--verbose",
+    "-v",
+    is_flag=True,
+    help="Enable verbose output",
+)
+@click.option(
+    "--path",
+    "-p",
+    type=click.Path(exists=True),
+    help="Path to scan (defaults to current directory)",
+)
+@click.version_option(version=__version__, prog_name="i18n-guardian")
+@click.pass_context
+def main(
+    ctx: click.Context,
+    config: Optional[str],
+    verbose: bool,
+    path: Optional[str],
+) -> None:
+    """i18n-guardian: Scan codebases for internationalization issues."""
+    ctx.ensure_object(dict)
+    ctx.obj["config"] = config
+    ctx.obj["verbose"] = verbose
+    ctx.obj["path"] = path or os.getcwd()
+
+
+@main.command()
+@click.option(
+    "--output",
+    "-o",
+    type=click.Choice(["text", "json"]),
+    default="text",
+    help="Output format",
+)
+@click.option(
+    "--exclude",
+    multiple=True,
+    help="Exclude patterns (glob)",
+)
+@click.option(
+    "--min-length",
+    type=int,
+    default=3,
+    help="Minimum string length to flag",
+)
+@click.pass_context
+def scan(
+    ctx: click.Context,
+    output: str,
+    exclude: tuple,
+    min_length: int,
+) -> None:
+    """Scan codebase for hardcoded strings."""
+    path = ctx.obj["path"]
+    config_path = ctx.obj["config"]
+    verbose = ctx.obj["verbose"]
+
+    config_loader = ConfigLoader()
+    config = config_loader.load(config_path, path)
+
+    click.echo(f"Scanning {path}...")
+    if verbose:
+        click.echo(f"Config: {config}")
+        click.echo(f"Output format: {output}")
+        click.echo(f"Exclude patterns: {exclude}")
+        click.echo(f"Min length: {min_length}")
+
+
+@main.command()
+@click.option(
+    "--dry-run",
+    is_flag=True,
+    help="Preview changes without applying",
+)
+@click.option(
+    "--output",
+    "-o",
+    type=click.Choice(["text", "json"]),
+    default="text",
+    help="Output format",
+)
+@click.pass_context
+def fix(
+    ctx: click.Context,
+    dry_run: bool,
+    output: str,
+) -> None:
+    """Auto-fix i18n issues."""
+    path = ctx.obj["path"]
+
+    click.echo(f"Fixing i18n issues in {path}...")
+    if dry_run:
+        click.echo("Dry run mode - no changes will be applied")
+
+
+@main.command()
+@click.option(
+    "--output",
+    "-o",
+    type=click.Path(),
+    default=".i18n-guardian.yaml",
+    help="Output file path",
+)
+def init(output: str) -> None:
+    """Initialize configuration file."""
+    click.echo(f"Initializing configuration in {output}")
+
+
+@main.command()
+@click.option(
+    "--fail-level",
+    type=click.Choice(["error", "warning", "info"]),
+    default="error",
+    help="Minimum level to fail CI build",
+)
+@click.option(
+    "--output",
+    "-o",
+    type=click.Choice(["text", "json"]),
+    default="text",
+    help="Output format",
+)
+@click.pass_context
+def check(
+    ctx: click.Context,
+    fail_level: str,
+    output: str,
+) -> None:
+    """Check i18n compliance (for CI/CD)."""
+    path = ctx.obj["path"]
+    click.echo(f"Checking i18n compliance in {path}...")
+
+
+def cli() -> None:
+    """Entry point for the CLI."""
+    main()
+
+
+if __name__ == "__main__":
+    main()