Adopt hatch-vcs for tag-driven versioning

.github/workflows/ci.yml

@@ -12,6 +12,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Install uv
         uses: astral-sh/setup-uv@v8.2.0

.github/workflows/release.yml

@@ -13,6 +13,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
+        with:
+          fetch-depth: 0
       - name: Set up uv
         uses: astral-sh/setup-uv@v8.2.0
         with:

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "vesper"
-version = "0.1.0"
+dynamic = ["version"]
 description = "A2A-capable music control agent for the Cider Apple Music client."
 readme = "README.md"
 requires-python = ">=3.12"
@@ -28,9 +28,15 @@ dev = [
 vesper = "vesper.cli:main"
 
 [build-system]
-requires = ["hatchling"]
+requires = ["hatchling", "hatch-vcs"]
 build-backend = "hatchling.build"
 
+[tool.hatch.version]
+source = "vcs"
+# Safety net: if no git tags/history are available (e.g. source tarballs or
+# shallow checkouts without tags), fall back instead of failing the build.
+fallback-version = "0.0.0"
+
 [tool.hatch.build.targets.wheel]
 packages = ["vesper"]