diff --git a/Dockerfile b/Dockerfile
index 43bb5d0c..b87decb7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -69,6 +69,7 @@ RUN pip install --no-cache-dir uv
 COPY cli/pyproject.toml ./
 COPY cli/uv.lock ./
 COPY cli/README.md ./
+COPY cli/hatch_build.py ./
 COPY config/plano_config_schema.yaml /config/plano_config_schema.yaml
 COPY config/envoy.template.yaml /config/envoy.template.yaml
 
diff --git a/cli/.gitignore b/cli/.gitignore
new file mode 100644
index 00000000..9165af36
--- /dev/null
+++ b/cli/.gitignore
@@ -0,0 +1 @@
+planoai/data/
diff --git a/cli/hatch_build.py b/cli/hatch_build.py
new file mode 100644
index 00000000..fae3fa42
--- /dev/null
+++ b/cli/hatch_build.py
@@ -0,0 +1,44 @@
+"""Hatch build hook to bundle config files from the repo into the package.
+
+Single source of truth stays in ../config/. This hook copies them into
+planoai/data/ so they end up inside both the sdist and wheel.
+"""
+
+import os
+import shutil
+
+from hatchling.builders.hooks.plugin.interface import BuildHookInterface
+
+FILES = {
+    "plano_config_schema.yaml": "plano_config_schema.yaml",
+    "envoy.template.yaml": "envoy.template.yaml",
+}
+
+
+class CustomBuildHook(BuildHookInterface):
+    def initialize(self, version, build_data):
+        root = os.path.dirname(__file__)
+        # Repo checkout: ../config/  |  sdist: config/
+        candidates = [
+            os.path.join(root, "..", "config"),
+            os.path.join(root, "config"),
+        ]
+        dest_dir = os.path.join(root, "planoai", "data")
+        os.makedirs(dest_dir, exist_ok=True)
+
+        for src_name, dest_name in FILES.items():
+            dest = os.path.join(dest_dir, dest_name)
+            copied = False
+            for cand in candidates:
+                src = os.path.join(cand, src_name)
+                if os.path.exists(src):
+                    shutil.copy2(src, dest)
+                    copied = True
+                    break
+            if not copied and not os.path.exists(dest):
+                raise FileNotFoundError(
+                    f"Config file {src_name} not found. "
+                    "Build from the repo root or ensure files are present."
+                )
+
+        build_data["force_include"][dest_dir] = "planoai/data"
diff --git a/cli/pyproject.toml b/cli/pyproject.toml
index f92d557e..3d532165 100644
--- a/cli/pyproject.toml
+++ b/cli/pyproject.toml
@@ -37,12 +37,15 @@ path = "planoai/__init__.py"
 [tool.hatch.build.targets.wheel]
 packages = ["planoai"]
 
-[tool.hatch.build.targets.wheel.force-include]
-"../config/plano_config_schema.yaml" = "planoai/data/plano_config_schema.yaml"
-"../config/envoy.template.yaml" = "planoai/data/envoy.template.yaml"
-
 [tool.hatch.build.targets.sdist]
-include = ["planoai/**"]
+include = ["planoai/**", "hatch_build.py"]
+
+[tool.hatch.build.targets.sdist.force-include]
+"../config/plano_config_schema.yaml" = "config/plano_config_schema.yaml"
+"../config/envoy.template.yaml" = "config/envoy.template.yaml"
+
+[tool.hatch.build]
+hooks.custom.path = "hatch_build.py"
 
 [tool.pytest.ini_options]
 addopts = ["-v"]