diff --git a/CHANGELOG.md b/CHANGELOG.md
index af348d4..f886b18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- `ossmate version` and `ossmate_mcp.__version__` resolved to the hardcoded literal `"0.0.1"` instead of the installed package version. Both `__init__.py` modules now read from `importlib.metadata.version()` so they always agree with what `pip show` reports. New invariant test [tests/test_versioning.py](tests/test_versioning.py)::`test_init_modules_dont_hardcode_versions` forbids the hardcoded form going forward — caught the day after v0.1.0 shipped to PyPI
+
 ## [0.1.0] - 2026-04-19
 
 First public release. Reference implementation of every Claude Code extension surface, packaged as both a plugin and a standalone CLI.
diff --git a/cli/ossmate/src/ossmate/__init__.py b/cli/ossmate/src/ossmate/__init__.py
index 5b81ee4..e829409 100644
--- a/cli/ossmate/src/ossmate/__init__.py
+++ b/cli/ossmate/src/ossmate/__init__.py
@@ -1,3 +1,8 @@
 """Ossmate — Claude-powered co-maintainer CLI."""
 
-__version__ = "0.0.1"
+from importlib.metadata import PackageNotFoundError, version as _pkg_version
+
+try:
+    __version__ = _pkg_version("ossmate")
+except PackageNotFoundError:
+    __version__ = "0.0.0+source"
diff --git a/mcp/ossmate_mcp/src/ossmate_mcp/__init__.py b/mcp/ossmate_mcp/src/ossmate_mcp/__init__.py
index ff6c0cd..bcbe141 100644
--- a/mcp/ossmate_mcp/src/ossmate_mcp/__init__.py
+++ b/mcp/ossmate_mcp/src/ossmate_mcp/__init__.py
@@ -1,3 +1,8 @@
 """Ossmate MCP server — OSS maintainer tools exposed via Model Context Protocol."""
 
-__version__ = "0.0.1"
+from importlib.metadata import PackageNotFoundError, version as _pkg_version
+
+try:
+    __version__ = _pkg_version("ossmate-mcp")
+except PackageNotFoundError:
+    __version__ = "0.0.0+source"
diff --git a/tests/test_versioning.py b/tests/test_versioning.py
index 573d268..5d52d9a 100644
--- a/tests/test_versioning.py
+++ b/tests/test_versioning.py
@@ -115,6 +115,28 @@ def test_marketplace_manifest_has_two_version_locations(self):
         assert "metadata" in data and "version" in data["metadata"]
         assert data["plugins"] and "version" in data["plugins"][0]
 
+    def test_init_modules_dont_hardcode_versions(self):
+        """`__init__.py` files MUST resolve __version__ from importlib.metadata
+        rather than hardcoding the literal — otherwise `bump_version.py`
+        misses them and `ossmate version` lies to users (regression caught
+        in v0.1.0 post-release)."""
+        for init in (
+            REPO_ROOT / "cli" / "ossmate" / "src" / "ossmate" / "__init__.py",
+            REPO_ROOT / "mcp" / "ossmate_mcp" / "src" / "ossmate_mcp" / "__init__.py",
+        ):
+            text = init.read_text(encoding="utf-8")
+            assert "importlib.metadata" in text, (
+                f"{init.relative_to(REPO_ROOT)} must read __version__ from "
+                f"importlib.metadata — hardcoding drifts on every release"
+            )
+            # Belt-and-suspenders: forbid the literal `__version__ = "X.Y.Z"` form.
+            import re as _re
+
+            assert not _re.search(r'^__version__\s*=\s*"\d', text, _re.MULTILINE), (
+                f"{init.relative_to(REPO_ROOT)} hardcodes __version__ — use "
+                f"importlib.metadata.version() instead"
+            )
+
     def test_cli_dep_pin_matches_mcp_version(self, bump):
         """The CLI declares `ossmate-mcp>=X` — X must equal the MCP package
         version, otherwise users get an unsolvable resolver state on first