diff --git a/.gitignore b/.gitignore
index 4b7e182..bff27ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,21 @@
 .superpowers/
 .bounded
 .DS_Store
+
+# Python
+__pycache__/
+*.py[cod]
+*.egg-info/
+build/
+dist/
+.pytest_cache/
+.mypy_cache/
+.ruff_cache/
+.coverage
+htmlcov/
+.venv/
+.env
+
+# Проект
+arm_statements/VERSION
+.codegraph/
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6f3bc05
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,23 @@
+BIN := $(CURDIR)/.venv/bin
+
+.PHONY: help venv lint test check golden-update
+
+help: ## Список целей
+	@grep -E '^[a-z-]+:.*##' $(MAKEFILE_LIST) | sed 's/:.*##/ —/'
+
+venv: ## Создать .venv и поставить зависимости (с dev)
+	uv venv --python 3.11 --allow-existing .venv
+	uv pip install --python .venv/bin/python -r pyproject.toml --extra dev
+
+lint: ## ruff check, ruff format --check, mypy
+	$(BIN)/ruff check .
+	$(BIN)/ruff format --check .
+	$(BIN)/mypy arm_statements
+
+test: ## pytest
+	$(BIN)/pytest
+
+check: lint test ## lint + test
+
+golden-update: ## Обновить эталоны golden-теста (задача 20)
+	GOLDEN_UPDATE=1 $(BIN)/pytest arm_statements/tests/test_golden.py
diff --git a/README.md b/README.md
index 208fa1d..b5b0bbe 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,13 @@
 Общий код нормализации форм ББ/ОФР (пакет `arm_statements`) для tabular-parser, scan-gateway и arm-core.
 Раскладывается копией в `api/arm_statements/` хостов скриптом `sync-statements` из arm-ka-docs.
 Спека: arm-ka-docs, `openspec/changes/unified-statement-normalization/`.
+
+Копия раскладывается `make -C docs sync-statements`; прямые правки копии в хостах запрещены.
+
+## Как проверить
+
+```bash
+make venv && make check
+```
+
+Раздел «Публичный API» дописывается в задаче 20.
diff --git a/arm_statements/__init__.py b/arm_statements/__init__.py
new file mode 100644
index 0000000..6339e26
--- /dev/null
+++ b/arm_statements/__init__.py
@@ -0,0 +1,5 @@
+"""Общий код нормализации форм ББ/ОФР."""
+
+from arm_statements.version import statements_version
+
+__all__ = ["statements_version"]
diff --git a/arm_statements/tests/__init__.py b/arm_statements/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/arm_statements/tests/conftest.py b/arm_statements/tests/conftest.py
new file mode 100644
index 0000000..c3a717e
--- /dev/null
+++ b/arm_statements/tests/conftest.py
@@ -0,0 +1 @@
+"""Общие фикстуры тестов пакета (фикстура `rules` появится в задаче 3)."""
diff --git a/arm_statements/tests/test_version.py b/arm_statements/tests/test_version.py
new file mode 100644
index 0000000..be00685
--- /dev/null
+++ b/arm_statements/tests/test_version.py
@@ -0,0 +1,21 @@
+from pathlib import Path
+
+from arm_statements.version import statements_version
+
+FULL_HASH = "abc1234def5678abc1234def5678abc1234def56"
+
+
+def test_version_absent_in_source() -> None:
+    assert statements_version() is None
+
+
+def test_version_read_from_file(tmp_path: Path) -> None:
+    marker = tmp_path / "VERSION"
+    marker.write_text(f"{FULL_HASH}\n", encoding="utf-8")
+    assert statements_version(marker) == FULL_HASH
+
+
+def test_version_empty_file_is_none(tmp_path: Path) -> None:
+    marker = tmp_path / "VERSION"
+    marker.write_text("  \n", encoding="utf-8")
+    assert statements_version(marker) is None
diff --git a/arm_statements/version.py b/arm_statements/version.py
new file mode 100644
index 0000000..d9e2ad5
--- /dev/null
+++ b/arm_statements/version.py
@@ -0,0 +1,14 @@
+"""Маркер версии копии пакета: файл VERSION пишет только sync-statements в хосте."""
+
+from pathlib import Path
+
+_DEFAULT_MARKER = Path(__file__).parent / "VERSION"
+
+
+def statements_version(path: Path | None = None) -> str | None:
+    """Вернуть версию копии (хеш коммита) или None, если файла нет или он пуст."""
+    marker = _DEFAULT_MARKER if path is None else path
+    if not marker.is_file():
+        return None
+    text = marker.read_text(encoding="utf-8").strip()
+    return text or None
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..119e89a
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,34 @@
+[project]
+name = "arm-statements"
+version = "0"
+requires-python = ">=3.11,<3.12"
+dependencies = ["PyYAML==6.0.3"]
+
+[project.optional-dependencies]
+dev = [
+    "ruff==0.16.10",
+    "mypy==2.4.0",
+    "pytest==9.1.1",
+    "types-PyYAML==6.0.12.20260906",
+]
+
+[tool.ruff]
+line-length = 120
+target-version = "py311"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "UP", "B", "PL"]
+
+[tool.ruff.lint.isort]
+known-first-party = ["arm_statements"]
+
+[tool.mypy]
+python_version = "3.11"
+strict = true
+mypy_path = "."
+explicit_package_bases = true
+
+[tool.pytest.ini_options]
+testpaths = ["arm_statements/tests"]
+pythonpath = ["."]
+addopts = "--tb=short --strict-markers"