diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..e5eee0e
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,2 @@
+# Copy this file to .env and fill values when needed.
+JARVIS_ENV=development
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7d3916b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,30 @@
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+*.pyd
+.Python
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+
+# Virtual environments
+.venv/
+venv/
+env/
+
+# Build artifacts
+build/
+dist/
+*.egg-info/
+
+# IDE/editor
+.vscode/
+.idea/
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Local environment
+.env
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1021364
--- /dev/null
+++ b/README.md
@@ -0,0 +1,28 @@
+# jarvis_glm
+
+A Windows-friendly Python 3.11+ scaffold for a future Jarvis voice assistant.
+
+## Quickstart
+
+1. Create and activate a virtual environment.
+2. Install package and dev tooling:
+
+```bash
+pip install -e .[dev]
+```
+
+## CLI
+
+Run environment diagnostics:
+
+```bash
+python -m jarvis doctor
+```
+
+## Development checks
+
+```bash
+pytest
+ruff check .
+mypy
+```
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..a1549b2
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,45 @@
+[build-system]
+requires = ["setuptools>=68", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "jarvis_glm"
+version = "0.1.0"
+description = "Windows-friendly voice assistant scaffold"
+readme = "README.md"
+requires-python = ">=3.11"
+authors = [{ name = "Jarvis Team" }]
+dependencies = []
+
+[project.optional-dependencies]
+dev = [
+  "pytest>=8.0",
+  "ruff>=0.6.0",
+  "mypy>=1.10",
+]
+
+[tool.setuptools]
+package-dir = {"" = "src"}
+
+[tool.setuptools.packages.find]
+where = ["src"]
+
+[tool.pytest.ini_options]
+minversion = "8.0"
+addopts = "-ra"
+testpaths = ["tests"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"
+src = ["src", "tests"]
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "B", "UP"]
+
+[tool.mypy]
+python_version = "3.11"
+strict = true
+mypy_path = ["src"]
+packages = ["jarvis"]
+warn_unused_configs = true
diff --git a/src/jarvis/__init__.py b/src/jarvis/__init__.py
new file mode 100644
index 0000000..858909d
--- /dev/null
+++ b/src/jarvis/__init__.py
@@ -0,0 +1,5 @@
+"""jarvis package."""
+
+__all__ = ["__version__"]
+
+__version__ = "0.1.0"
diff --git a/src/jarvis/__main__.py b/src/jarvis/__main__.py
new file mode 100644
index 0000000..0fff28a
--- /dev/null
+++ b/src/jarvis/__main__.py
@@ -0,0 +1,34 @@
+"""CLI entrypoint for jarvis."""
+
+from __future__ import annotations
+
+import argparse
+
+from jarvis.doctor import format_diagnostics
+
+
+def build_parser() -> argparse.ArgumentParser:
+    """Build command-line parser."""
+    parser = argparse.ArgumentParser(prog="jarvis", description="Jarvis assistant CLI")
+    subparsers = parser.add_subparsers(dest="command")
+
+    subparsers.add_parser("doctor", help="Print environment diagnostics")
+
+    return parser
+
+
+def main() -> int:
+    """Run the jarvis CLI."""
+    parser = build_parser()
+    args = parser.parse_args()
+
+    if args.command == "doctor":
+        print(format_diagnostics())
+        return 0
+
+    parser.print_help()
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())
diff --git a/src/jarvis/doctor.py b/src/jarvis/doctor.py
new file mode 100644
index 0000000..8133f29
--- /dev/null
+++ b/src/jarvis/doctor.py
@@ -0,0 +1,27 @@
+"""Environment diagnostics for Jarvis CLI."""
+
+from __future__ import annotations
+
+import os
+import platform
+import sys
+
+
+def collect_diagnostics() -> dict[str, str]:
+    """Collect basic diagnostics for the current runtime environment."""
+    return {
+        "python_executable": sys.executable,
+        "python_version": platform.python_version(),
+        "platform": platform.platform(),
+        "system": platform.system(),
+        "machine": platform.machine(),
+        "windows_comspec": os.environ.get("COMSPEC", "not set"),
+    }
+
+
+def format_diagnostics() -> str:
+    """Format diagnostics as human-readable text."""
+    diagnostics = collect_diagnostics()
+    lines = ["Jarvis Doctor", "============="]
+    lines.extend(f"{key}: {value}" for key, value in diagnostics.items())
+    return "\n".join(lines)
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..a36031a
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,9 @@
+from __future__ import annotations
+
+import sys
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[1]
+SRC = ROOT / "src"
+
+sys.path.insert(0, str(SRC))
diff --git a/tests/test_doctor.py b/tests/test_doctor.py
new file mode 100644
index 0000000..1d4f489
--- /dev/null
+++ b/tests/test_doctor.py
@@ -0,0 +1,41 @@
+from __future__ import annotations
+
+import os
+import subprocess
+import sys
+from pathlib import Path
+
+from jarvis.doctor import collect_diagnostics, format_diagnostics
+
+
+def test_collect_diagnostics_contains_expected_keys() -> None:
+    diagnostics = collect_diagnostics()
+
+    assert diagnostics["python_executable"]
+    assert diagnostics["python_version"]
+    assert diagnostics["platform"]
+
+
+def test_format_diagnostics_header() -> None:
+    output = format_diagnostics()
+
+    assert "Jarvis Doctor" in output
+    assert "python_version:" in output
+
+
+def test_module_cli_doctor() -> None:
+    root = Path(__file__).resolve().parents[1]
+    src = root / "src"
+    env = os.environ.copy()
+    env["PYTHONPATH"] = str(src)
+
+    result = subprocess.run(
+        [sys.executable, "-m", "jarvis", "doctor"],
+        check=False,
+        capture_output=True,
+        text=True,
+        env=env,
+    )
+
+    assert result.returncode == 0
+    assert "Jarvis Doctor" in result.stdout