diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 675aa20..f96101d 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -127,13 +127,13 @@ jobs:
           build-args:
             PYTHON_VERSION=${{ env.PYTHON_VERSION }}
           outputs: type=docker,dest=runtime-${{ matrix.arch }}.tar
-      
+
       - name: Setup the Crossplane CLI
-        run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
+        run: "mkdir bin && cd bin && curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
 
       - name: Build Package
-        run: ./crossplane xpkg build --package-file=${{ matrix.arch }}.xpkg --package-root=package/ --embed-runtime-image-tarball=runtime-${{ matrix.arch }}.tar
-      
+        run: bin/crossplane xpkg build --package-file=${{ matrix.arch }}.xpkg --package-root=package/ --embed-runtime-image-tarball=runtime-${{ matrix.arch }}.tar
+
       - name: Upload Single-Platform Package
         uses: actions/upload-artifact@v4
         with:
@@ -165,7 +165,15 @@ jobs:
           merge-multiple: true
 
       - name: Setup the Crossplane CLI
-        run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
+        run: "mkdir bin && cd bin && curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"
+
+      # If a version wasn't explicitly passed as a workflow_dispatch input we
+      # default to version v0.0.0-<git-commit-date>-<git-short-sha>, for example
+      # v0.0.0-20231101115142-1091066df799. This is a simple implementation of
+      # Go's pseudo-versions: https://go.dev/ref/mod#pseudo-versions.
+      - name: Set Default Multi-Platform Package Version
+        if: env.XPKG_VERSION == ''
+        run: echo "XPKG_VERSION=v0.0.0-$(date -d@$(git show -s --format=%ct) +%Y%m%d%H%M%S)-$(git rev-parse --short=12 HEAD)" >> $GITHUB_ENV
 
       # - name: Login to Upbound
       #   uses: docker/login-action@v3
@@ -175,17 +183,9 @@ jobs:
       #     username: ${{ secrets.XPKG_ACCESS_ID }}
       #     password: ${{ secrets.XPKG_TOKEN }}
 
-      # If a version wasn't explicitly passed as a workflow_dispatch input we
-      # default to version v0.0.0-<git-commit-date>-<git-short-sha>, for example
-      # v0.0.0-20231101115142-1091066df799. This is a simple implementation of
-      # Go's pseudo-versions: https://go.dev/ref/mod#pseudo-versions.
-      # - name: Set Default Multi-Platform Package Version
-      #   if: env.XPKG_VERSION == ''
-      #   run: echo "XPKG_VERSION=v0.0.0-$(date -d@$(git show -s --format=%ct) +%Y%m%d%H%M%S)-$(git rev-parse --short=12 HEAD)" >> $GITHUB_ENV
-
       # - name: Push Multi-Platform Package to Upbound
       #   if: env.XPKG_ACCESS_ID != ''
-      #   run: "./crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.XPKG }}:${{ env.XPKG_VERSION }}"
+      #   run: "bin/crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.XPKG }}:${{ env.XPKG_VERSION }}"
 
       - name: Login to GHCR
         uses: docker/login-action@v3
@@ -195,4 +195,4 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Push Multi-Platform Package to GHCR
-        run: "./crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.CROSSPLANE_REGORG }}:${{ env.XPKG_VERSION }}"
+        run: "bin/crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.CROSSPLANE_REGORG }}:${{ env.XPKG_VERSION }}"
diff --git a/CloudOps.groovy b/CloudOps.groovy
deleted file mode 100644
index a993281..0000000
--- a/CloudOps.groovy
+++ /dev/null
@@ -1,25 +0,0 @@
-cloudops.dockerImage {
-
-    container {
-        name 'podman'
-        image 'quay.io/podman/stable:latest'
-        requests {
-            cpu '1'
-            memory '4Gi'
-        }
-        root true
-        privileged true
-    }
-
-    build { context ->
-        def arches = ['amd64', 'arm64']
-        arches.each { arch ->
-            container('podman') {
-                sh "podman build --platform=linux/$arch --tag=$arch ."
-                sh "podman image save --format docker-archive localhost/$arch --output image.$arch"
-            }
-            sh "crossplane xpkg build --package-root=package --embed-runtime-image-tarball=image.$arch --package-file=xpkg.$arch"
-        }
-        sh "crossplane xpkg push --package-files=${arches.collect{"xpkg.$it"}.join(',')} $context.INTERIM_IMAGE"
-    }
-}
diff --git a/Dockerfile b/Dockerfile
index 0ab87ca..c2a5c1c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -27,17 +27,17 @@ RUN \
     && /venv/build/bin/pip install hatch \
     && /venv/build/bin/hatch build -t wheel /whl
 
-# Create a fresh venv and install only the function wheel into it.
+# Create a fresh venv and install only the pythonic wheel into it.
 #RUN --mount=type=cache,target=/root/.cache/pip \
 RUN \
     python3 -m venv /venv/fn \
     && /venv/fn/bin/pip install /whl/*.whl
 
-# Copy the function venv to our runtime stage. It's important that the path be
+# Copy the pythonic venv to our runtime stage. It's important that the path be
 # the same as in the build stage, to avoid shebang paths and symlinks breaking. 
 FROM gcr.io/distroless/python3-debian12 AS image
 WORKDIR /
 USER nonroot:nonroot
 COPY --from=build --chown=nonroot:nonroot /venv/fn /venv/fn
 EXPOSE 9443
-ENTRYPOINT ["/venv/fn/bin/function"]
+ENTRYPOINT ["/venv/fn/bin/pythonic"]
diff --git a/README.md b/README.md
index a1e9cd6..44798f6 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@ spec:
             vpc.spec.forProvider.cidrBlock = self.spec.cidr
             self.status.vpcId = vpc.status.atProvider.vpcId
 ```
+In addtion to an inline script, the python implementation can be specified
+as the complete path to a python class. See [Filing system Composites](#filing-system-composites).
 
 ## Examples
 
@@ -270,6 +272,38 @@ spec:
         self.status.composite = 'Hello, World!'
 ```
 
+## Filing system Composites
+
+Composition Composite implementations can be coded in a stand alone python files
+by configuring the function-pythonic deployment with the code mounted into
+the package-runtime container, and then adding the mount point to the python
+path using the --python-path command line option.
+```yaml
+apiVersion: pkg.crossplane.io/v1beta1
+kind: DeploymentRuntimeConfig
+metadata:
+  name: function-pythonic
+spec:
+  deploymentTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: package-runtime
+            args:
+            - --debug
+            - --python-path
+            - /mnt/composites
+            volumeMounts:
+            - name: composites
+              mountPath: /mnt/composites
+          volumes:
+          - name: composites
+            configMap:
+              name: pythonic-composites
+```
+See the [filing-system](examples/filing-system) example.
+
 ## Install Additional Python Packages
 
 function-pythonic supports a `--pip-install` command line option which will run pip install
diff --git a/crossplane/pythonic/__init__.py b/crossplane/pythonic/__init__.py
new file mode 100644
index 0000000..5861dc9
--- /dev/null
+++ b/crossplane/pythonic/__init__.py
@@ -0,0 +1,17 @@
+import base64
+
+from .composite import BaseComposite
+from .protobuf import Map, List, Unknown, Yaml, Json
+B64Encode = lambda s: base64.b64encode(s.encode('utf-8')).decode('utf-8')
+B64Decode = lambda s: base64.b64decode(s.encode('utf-8')).decode('utf-8')
+
+__all__ = [
+    'BaseComposite',
+    'Map',
+    'List',
+    'Unknown',
+    'Yaml',
+    'Json',
+    'B64Encode',
+    'B64Decode',
+]
diff --git a/function/__version__.py b/crossplane/pythonic/__version__.py
similarity index 100%
rename from function/__version__.py
rename to crossplane/pythonic/__version__.py
diff --git a/function/composite.py b/crossplane/pythonic/composite.py
similarity index 95%
rename from function/composite.py
rename to crossplane/pythonic/composite.py
index 26841d5..99d7e6e 100644
--- a/function/composite.py
+++ b/crossplane/pythonic/composite.py
@@ -2,7 +2,7 @@
 import datetime
 from crossplane.function.proto.v1 import run_function_pb2 as fnv1
 
-import function.protobuf
+from . import protobuf
 
 
 _notset = object()
@@ -10,8 +10,8 @@
 
 class BaseComposite:
     def __init__(self, request, response, logger):
-        self.request = function.protobuf.Message(None, None, request.DESCRIPTOR, request, 'Function Request')
-        self.response = function.protobuf.Message(None, None, response.DESCRIPTOR, response)
+        self.request = protobuf.Message(None, None, request.DESCRIPTOR, request, 'Function Request')
+        self.response = protobuf.Message(None, None, response.DESCRIPTOR, response)
         self.logger = logger
         self.autoReady = True
         self.credentials = Credentials(self.request)
@@ -54,7 +54,7 @@ def ready(self):
     def ready(self, ready):
         if ready:
             ready = fnv1.Ready.READY_TRUE
-        elif ready == None or (isinstance(ready, function.protobuf.Values) and ready._isUnknown):
+        elif ready == None or (isinstance(ready, protobuf.Values) and ready._isUnknown):
             ready = fnv1.Ready.READY_UNSPECIFIED
         else:
             ready = fnv1.Ready.READY_FALSE
@@ -115,7 +115,6 @@ def __setattr__(self, key, resource):
         self[key] = resource
 
     def __setitem__(self, key, resource):
-        print('SETITEM', key, resource)
         self._composite.response.desired.resources[key].resource = resource
 
     def __delattr__(self, key):
@@ -216,7 +215,7 @@ def ready(self):
     def ready(self, ready):
         if ready:
             ready = fnv1.Ready.READY_TRUE
-        elif ready == None or (isinstance(ready, function.protobuf.Values) and ready._isUnknown):
+        elif ready == None or (isinstance(ready, protobuf.Values) and ready._isUnknown):
             ready = fnv1.Ready.READY_UNSPECIFIED
         else:
             ready = fnv1.Ready.READY_FALSE
@@ -422,7 +421,7 @@ def claim(self, claim):
         if bool(self):
             if claim:
                 self._result.target = fnv1.Target.TARGET_COMPOSITE_AND_CLAIM
-            elif claim == None or (isinstance(claim, function.protobuf.Values) and claim._isUnknown):
+            elif claim == None or (isinstance(claim, protobuf.Values) and claim._isUnknown):
                 self._result.target = fnv1.Target.TARGET_UNSPECIFIED
             else:
                 self._result.target = fnv1.Target.TARGET_COMPOSITE
@@ -461,7 +460,7 @@ def __getitem__(self, type):
         return Condition(self, type)
 
 
-class Condition(function.protobuf.ProtobufValue):
+class Condition(protobuf.ProtobufValue):
     def __init__(self, conditions, type):
         self._conditions = conditions
         self.type = type
@@ -509,7 +508,7 @@ def status(self, status):
             condition.status = fnv1.Status.STATUS_CONDITION_TRUE
         elif status == None:
             condition.status = fnv1.Status.STATUS_CONDITION_UNKNOWN
-        elif isinstance(status, function.protobuf.Values) and status._isUnknown:
+        elif isinstance(status, protobuf.Values) and status._isUnknown:
             condition.status = fnv1.Status.STATUS_CONDITION_UNSPECIFIED
         else:
             condition.status = fnv1.Status.STATUS_CONDITION_FALSE
@@ -556,7 +555,7 @@ def claim(self, claim):
         condition = self._find_condition(True)
         if claim:
             condition.target = fnv1.Target.TARGET_COMPOSITE_AND_CLAIM
-        elif claim == None or (isinstance(claim, function.protobuf.Values) and claim._isUnknown):
+        elif claim == None or (isinstance(claim, protobuf.Values) and claim._isUnknown):
             condition.target = fnv1.Target.TARGET_UNSPECIFIED
         else:
             condition.target = fnv1.Target.TARGET_COMPOSITE
diff --git a/function/fn.py b/crossplane/pythonic/function.py
similarity index 55%
rename from function/fn.py
rename to crossplane/pythonic/function.py
index 6e0de12..a1529b2 100644
--- a/function/fn.py
+++ b/crossplane/pythonic/function.py
@@ -2,6 +2,8 @@
 
 import asyncio
 import base64
+import builtins
+import importlib
 import inspect
 
 import grpc
@@ -9,8 +11,16 @@
 import crossplane.function.response
 from crossplane.function.proto.v1 import run_function_pb2 as fnv1
 from crossplane.function.proto.v1 import run_function_pb2_grpc as grpcv1
-import function.composite
-import function.protobuf
+from .. import pythonic
+
+builtins.BaseComposite = pythonic.BaseComposite
+builtins.Map = pythonic.Map
+builtins.List = pythonic.List
+builtins.Unknown = pythonic.Unknown
+builtins.Yaml = pythonic.Yaml
+builtins.Json = pythonic.Json
+builtins.B64Encode = pythonic.B64Encode
+builtins.B64Decode = pythonic.B64Decode
 
 
 class FunctionRunner(grpcv1.FunctionRunnerService):
@@ -19,7 +29,7 @@ class FunctionRunner(grpcv1.FunctionRunnerService):
     def __init__(self):
         """Create a new FunctionRunner."""
         self.logger = crossplane.function.logging.get_logger()
-        self.modules = {}
+        self.clazzes = {}
 
     async def RunFunction(
         self, request: fnv1.RunFunctionRequest, _: grpc.aio.ServicerContext
@@ -52,23 +62,47 @@ async def RunFunction(
                 return response
             composite = input['composite']
 
-        module = self.modules.get(composite)
-        if not module:
-            module = Module()
-            try:
-                exec(composite, module.__dict__)
-            except Exception as e:
-                crossplane.function.response.fatal(response, f"Exec exception: {e}")
-                logger.exception('Exec exception')
+        clazz = self.clazzes.get(composite)
+        if not clazz:
+            if '\n' in composite:
+                module = Module()
+                try:
+                    exec(composite, module.__dict__)
+                except Exception as e:
+                    crossplane.function.response.fatal(response, f"Exec exception: {e}")
+                    logger.exception('Exec exception')
+                    return response
+                composite = ['<script>', 'Composite']
+            else:
+                composite = composite.rsplit('.', 1)
+                if len(composite) == 1:
+                    crossplane.function.response.fatal(response, f"Composite class name does not include module: {composite[0]}")
+                    logger.error(f"Composite class name does not include module: {composite[0]}")
+                    return response
+                try:
+                    module = importlib.import_module(composite[0])
+                except Exception as e:
+                    crossplane.function.response.fatal(response, f"Import module exception: {e}")
+                    logger.exception('Import module exception')
+                    return response
+            clazz = getattr(module, composite[1], None)
+            if not clazz:
+                crossplane.function.response.fatal(response, f"{composite[0]} did not define: {composite[1]}")
+                logger.error(f"{composite[0]} did not define: {composite[1]}")
+                return response
+            composite = '.'.join(composite)
+            if not inspect.isclass(clazz):
+                crossplane.function.response.fatal(response, f"{composite} is not a class")
+                logger.error(f"{composite} is not a class")
                 return response
-            if not hasattr(module, 'Composite') or not inspect.isclass(module.Composite):
-                crossplane.function.response.fatal(response, 'Function did not define "class Composite')
-                logger.error('Composite did not define "class Composite"')
+            if not issubclass(clazz, BaseComposite):
+                crossplane.function.response.fatal(response, f"{composite} is not a subclass of BaseComposite")
+                logger.error(f"{composite} is not a subclass of BaseComposite")
                 return response
-            self.modules[composite] = module
+            self.clazzes[composite] = clazz
 
         try:
-            composite = module.Composite(request, response, logger)
+            composite = clazz(request, response, logger)
         except Exception as e:
             crossplane.function.response.fatal(response, f"Instatiate exception: {e}")
             logger.exception('Instatiate exception')
@@ -101,12 +135,4 @@ async def RunFunction(
 
 
 class Module:
-    def __init__(self):
-        self.BaseComposite = function.composite.BaseComposite
-        self.Map = function.protobuf.Map
-        self.List = function.protobuf.List
-        self.Unknown = function.protobuf.Unknown
-        self.Yaml = function.protobuf.Yaml
-        self.Json = function.protobuf.Json
-        self.B64Encode = lambda s: base64.b64encode(s.encode('utf-8')).decode('utf-8')
-        self.B64Decode = lambda s: base64.b64decode(s.encode('utf-8')).decode('utf-8')
+    pass
diff --git a/function/main.py b/crossplane/pythonic/main.py
similarity index 86%
rename from function/main.py
rename to crossplane/pythonic/main.py
index bc0f0a1..c32bbe8 100644
--- a/function/main.py
+++ b/crossplane/pythonic/main.py
@@ -10,7 +10,7 @@
 import pip._internal.cli.main
 from crossplane.function import logging, runtime
 
-import function.fn
+from . import function
 
 
 def main():
@@ -38,6 +38,11 @@ def main():
         '--pip-install',
         help='Pip install command to install additional Python packages.'
     )
+    parser.add_argument(
+        '--python-path',
+        action='append',
+        help='Filing system directories to add to the python path',
+    )
     parser.add_argument(
         '--allow-oversize-protos',
         action='store_true',
@@ -50,6 +55,10 @@ def main():
     if args.pip_install:
         pip._internal.cli.main.main(['install', *shlex.split(args.pip_install)])
 
+    if args.python_path:
+        for path in reversed(args.python_path):
+            sys.path.insert(0, path)
+
     if args.allow_oversize_protos:
         from google.protobuf.internal import api_implementation
         if api_implementation._c_module:
@@ -57,7 +66,7 @@ def main():
 
     logging.configure(logging.Level.DEBUG if args.debug else logging.Level.INFO)
     runtime.serve(
-        function.fn.FunctionRunner(),
+        function.FunctionRunner(),
         args.address,
         creds=runtime.load_credentials(args.tls_certs_dir),
         insecure=args.insecure,
diff --git a/function/protobuf.py b/crossplane/pythonic/protobuf.py
similarity index 99%
rename from function/protobuf.py
rename to crossplane/pythonic/protobuf.py
index 8526c7f..212f1b2 100644
--- a/function/protobuf.py
+++ b/crossplane/pythonic/protobuf.py
@@ -6,7 +6,7 @@
 #
 #   region = request.observed.composite.resource.spec.region
 #
-# If any item in the path to the field does not exist, None is returned.
+# If any item in the path to the field does not exist an "Unknown" object is returned.
 # To set a field in the composite status:
 #
 #   response.desired.composite.resource.status.homepage.url = 'https://for.example.com'
diff --git a/examples/filing-system/README.md b/examples/filing-system/README.md
new file mode 100644
index 0000000..cea8925
--- /dev/null
+++ b/examples/filing-system/README.md
@@ -0,0 +1,13 @@
+# Filing System based Composite
+
+This example deploys a Crossplane Composition with the implementation
+written in a stand alone python file, which enables using the
+IDE of your choice for writing the python.
+
+Deploy using kustomize:
+```
+$ kubectl apply --kustomize .
+```
+When run for the first time, the CRD for the composite does not exist
+and will fail to deploy just that. Run a second time to also deploy
+the composite.
\ No newline at end of file
diff --git a/examples/filing-system/composition.yaml b/examples/filing-system/composition.yaml
new file mode 100644
index 0000000..4d2466b
--- /dev/null
+++ b/examples/filing-system/composition.yaml
@@ -0,0 +1,17 @@
+apiVersion: apiextensions.crossplane.io/v1
+kind: Composition
+metadata:
+  name: vclusters.example.joebowbeer.com
+spec:
+  compositeTypeRef:
+    apiVersion: example.joebowbeer.com/v1alpha1
+    kind: VCluster
+  mode: Pipeline
+  pipeline:
+  - step: pythonic
+    functionRef:
+      name: function-pythonic
+    input:
+      apiVersion: pythonic.fn.fortra.com/v1alpha1
+      kind: Composite
+      composite: vcluster.VClusterComposite
diff --git a/examples/filing-system/definition.yaml b/examples/filing-system/definition.yaml
new file mode 100644
index 0000000..4614229
--- /dev/null
+++ b/examples/filing-system/definition.yaml
@@ -0,0 +1,21 @@
+apiVersion: apiextensions.crossplane.io/v1
+kind: CompositeResourceDefinition
+metadata:
+  name: vclusters.example.joebowbeer.com
+spec:
+  group: example.joebowbeer.com
+  names:
+    kind: VCluster
+    plural: vclusters
+  scope: Cluster
+  versions:
+  - name: v1alpha1
+    served: true
+    referenceable: true
+    schema:
+      openAPIV3Schema:
+        type: object
+        properties:
+          spec:
+            type: object
+            properties: {}
diff --git a/examples/filing-system/function.yaml b/examples/filing-system/function.yaml
new file mode 100644
index 0000000..44814dd
--- /dev/null
+++ b/examples/filing-system/function.yaml
@@ -0,0 +1,10 @@
+apiVersion: pkg.crossplane.io/v1beta1
+kind: Function
+metadata:
+  name: function-pythonic
+spec:
+  package: ghcr.io/iciclespider/function-pythonic:v0.0.0-20250811193238-f8d5c82deb9b
+  runtimeConfigRef:
+    apiVersion: pkg.crossplane.io/v1beta1
+    kind: DeploymentRuntimeConfig
+    name: function-pythonic
diff --git a/examples/filing-system/kustomization.yaml b/examples/filing-system/kustomization.yaml
new file mode 100644
index 0000000..abaf786
--- /dev/null
+++ b/examples/filing-system/kustomization.yaml
@@ -0,0 +1,18 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+generatorOptions:
+  disableNameSuffixHash: true
+
+configMapGenerator:
+- namespace: crossplane-system
+  name: pythonic-composites
+  files:
+  - vcluster.py
+
+resources:
+- composition.yaml
+- definition.yaml
+- function.yaml
+- runtime.yaml
+- vcluster.yaml
diff --git a/examples/filing-system/runtime.yaml b/examples/filing-system/runtime.yaml
new file mode 100644
index 0000000..c0fe5dc
--- /dev/null
+++ b/examples/filing-system/runtime.yaml
@@ -0,0 +1,23 @@
+apiVersion: pkg.crossplane.io/v1beta1
+kind: DeploymentRuntimeConfig
+metadata:
+  name: function-pythonic
+spec:
+  deploymentTemplate:
+    spec:
+      selector: {}
+      template:
+        spec:
+          containers:
+          - name: package-runtime
+            args:
+            - --debug
+            - --python-path
+            - /mnt/composites
+            volumeMounts:
+            - name: composites
+              mountPath: /mnt/composites
+          volumes:
+          - name: composites
+            configMap:
+              name: pythonic-composites
diff --git a/examples/filing-system/vcluster.py b/examples/filing-system/vcluster.py
new file mode 100644
index 0000000..c1b770e
--- /dev/null
+++ b/examples/filing-system/vcluster.py
@@ -0,0 +1,38 @@
+from crossplane.pythonic import BaseComposite, Map
+
+class VClusterComposite(BaseComposite):
+
+    def compose(self):
+        name = self.metadata.name
+        namespace = name
+
+        release = self.resources.release('helm.crossplane.io/v1beta1', 'Release', name=name)
+        release.spec.rollbackLimit = 1
+        release.spec.forProvider.chart.repository = 'https://charts.loft.sh'
+        release.spec.forProvider.chart.name = 'vcluster'
+        release.spec.forProvider.chart.version = '0.26.0'
+        release.spec.forProvider.namespace = namespace
+        release.spec.forProvider.values.controlPlane.proxy.extraSANs[0] = f'{name}.{namespace}'
+
+        secret_name = f'vc-{name}'
+        vcluster_secret = self.requireds.vcluster_secret('v1', 'Secret', namespace, secret_name)[0]
+        if vcluster_secret:
+            argocd_secret = self.resources.argocd_secret('v1', 'Secret', 'default', secret_name)
+            argocd_secret.metadata.labels['argocd.argoproj.io/secret-type'] = 'cluster'
+            argocd_secret.type = 'Opaque'
+            argocd_secret.data.name = B64Encode(name)
+            argocd_secret.data.server = B64Encode(f'https://{name}.{namespace}:443')
+            argocd_secret.data.config = B64Encode(format(self.argcd_secret(vcluster_secret), 'json'))
+            argocd_secret.ready = argocd_secret.observed
+        else:
+            self.ready = False
+
+    def argcd_secret(self, secret):
+        config = Map()
+        config.tlsClientConfig.insecure = True
+        # ArgoCD wants these fields to be B64 encoded, so don't decode them
+        config.tlsClientConfig.caData = secret.data['certificate-authority']
+        config.tlsClientConfig.certData = secret.data['client-certificate']
+        config.tlsClientConfig.keyData = secret.data['client-key']
+        return config
+
diff --git a/examples/filing-system/vcluster.yaml b/examples/filing-system/vcluster.yaml
new file mode 100644
index 0000000..5d86997
--- /dev/null
+++ b/examples/filing-system/vcluster.yaml
@@ -0,0 +1,5 @@
+apiVersion: example.joebowbeer.com/v1alpha1
+kind: VCluster
+metadata:
+  name: xc1
+spec: {}
diff --git a/examples/helm-copy-secret/composition.yaml b/examples/helm-copy-secret/composition.yaml
index f71b73a..be8063a 100644
--- a/examples/helm-copy-secret/composition.yaml
+++ b/examples/helm-copy-secret/composition.yaml
@@ -1,11 +1,11 @@
 apiVersion: apiextensions.crossplane.io/v1
 kind: Composition
 metadata:
-  name: xclusters.example.joebowbeer.com
+  name: vclusters.example.joebowbeer.com
 spec:
   compositeTypeRef:
     apiVersion: example.joebowbeer.com/v1alpha1
-    kind: XCluster
+    kind: VCluster
   mode: Pipeline
   pipeline:
   - step: pythonic
@@ -38,18 +38,14 @@ spec:
             release.spec.forProvider.values.controlPlane.proxy.extraSANs[0] = f'{name}.{namespace}'
 
             secret_name = f'vc-{name}'
-            # This will work once crossplane-sdk-python is updated to the v2 function api
-            #vcluster_secrets = self.requireds.secrets('v1', 'Secret', namespace, secret_name)
-            vcluster_secrets = self.requireds.secrets('v1', 'Secret', labels={'vcluster-name':name})
-            for secret in vcluster_secrets:
-              if secret.metadata.namespace == namespace and secret.metadata.name == secret_name:
-                argocd_secret = self.resources.secret('v1', 'Secret', 'argocd', secret_name)
-                argocd_secret.metadata.labels['argocd.argoproj.io/secret-type'] = 'cluster'
-                argocd_secret.type = 'Opaque'
-                argocd_secret.data.name = B64Encode(name)
-                argocd_secret.data.server = B64Encode(f'https://{name}.{namespace}:443')
-                argocd_secret.data.config = B64Encode(format(argcd_secret_config(secret), 'json'))
-                argocd_secret.ready = argocd_secret.observed.data
-                break
+            vcluster_secret = self.requireds.vcluster_secret('v1', 'Secret', namespace, secret_name)[0]
+            if vcluster_secret:
+              argocd_secret = self.resources.argocd_secret('v1', 'Secret', 'default', secret_name)
+              argocd_secret.metadata.labels['argocd.argoproj.io/secret-type'] = 'cluster'
+              argocd_secret.type = 'Opaque'
+              argocd_secret.data.name = B64Encode(name)
+              argocd_secret.data.server = B64Encode(f'https://{name}.{namespace}:443')
+              argocd_secret.data.config = B64Encode(format(argcd_secret_config(vcluster_secret), 'json'))
+              argocd_secret.ready = argocd_secret.observed
             else:
               self.ready = False
diff --git a/examples/helm-copy-secret/xr.yaml b/examples/helm-copy-secret/xr.yaml
index 2c97756..5d86997 100644
--- a/examples/helm-copy-secret/xr.yaml
+++ b/examples/helm-copy-secret/xr.yaml
@@ -1,5 +1,5 @@
 apiVersion: example.joebowbeer.com/v1alpha1
-kind: XCluster
+kind: VCluster
 metadata:
   name: xc1
 spec: {}
diff --git a/examples/helm-copy-secret/xrd.yaml b/examples/helm-copy-secret/xrd.yaml
index ebb9eca..4614229 100644
--- a/examples/helm-copy-secret/xrd.yaml
+++ b/examples/helm-copy-secret/xrd.yaml
@@ -1,12 +1,12 @@
 apiVersion: apiextensions.crossplane.io/v1
 kind: CompositeResourceDefinition
 metadata:
-  name: xclusters.example.joebowbeer.com
+  name: vclusters.example.joebowbeer.com
 spec:
   group: example.joebowbeer.com
   names:
-    kind: XCluster
-    plural: xclusters
+    kind: VCluster
+    plural: vclusters
   scope: Cluster
   versions:
   - name: v1alpha1
diff --git a/pyproject.toml b/pyproject.toml
index d1208de..e30511e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,8 +3,8 @@ requires = ["hatchling"]
 build-backend = "hatchling.build"
 
 [project]
-name = "function"
-description = 'A Crossplane Function which composes Composites'
+name = "crossplane-function-pythonic"
+description = 'A Python centric Crossplane Function'
 readme = "README.md"
 requires-python = ">=3.11,<3.13"
 license = "Apache-2.0"
@@ -18,7 +18,7 @@ classifiers = [
 ]
 
 dependencies = [
-  "crossplane-function-sdk-python==0.8.0",
+  "crossplane-function-sdk-python==0.9.0",
   "pyyaml==6.0.2",
 ]
 
@@ -30,13 +30,13 @@ Issues = "https://github.com/fortra/function-pythonic/issues"
 Source = "https://github.com/fortra/function-pythonic"
 
 [project.scripts]
-function = "function.main:main"
+pythonic = "crossplane.pythonic.main:main"
 
 [tool.hatch.build.targets.wheel]
-packages = ["function"]
+packages = ["crossplane"]
 
 [tool.hatch.version]
-path = "function/__version__.py"
+path = "crossplane/pythonic/__version__.py"
 validate-bump = false            # Allow going from 0.0.0.dev0+x to 0.0.0.dev0+y.
 
 [tool.hatch.envs.default]
@@ -44,7 +44,7 @@ type = "virtual"
 path = ".venv-default"
 dependencies = ["ipython==9.1.0"]
 [tool.hatch.envs.default.scripts]
-development = "python function/main.py --insecure --debug --allow-oversize-protos"
+development = "python crossplane/pythonic/main.py --insecure --debug"
 
 [tool.hatch.envs.lint]
 type = "virtual"
@@ -52,7 +52,7 @@ detached = true
 path = ".venv-lint"
 dependencies = ["ruff==0.11.5"]
 [tool.hatch.envs.lint.scripts]
-check = "ruff check function tests && ruff format --diff function tests"
+check = "ruff check crossplane tests && ruff format --diff crossplane tests"
 
 [tool.hatch.envs.test]
 type = "virtual"
@@ -69,7 +69,7 @@ ci = "pytest tests --verbose --verbose --junitxml=reports/pytest-junit.xml --cov
 
 [tool.ruff]
 target-version = "py311"
-exclude = ["function/proto/*"]
+exclude = ["crossplane/pythonic/proto/*"]
 
 [tool.ruff.lint]
 select = [
@@ -108,7 +108,7 @@ ignore = ["ISC001"] # Ruff warns this is incompatible with ruff format.
 "tests/*" = ["D"] # Don't require docstrings for tests.
 
 [tool.ruff.lint.isort]
-known-first-party = ["function"]
+known-first-party = ["crossplane"]
 
 [tool.ruff.lint.pydocstyle]
 convention = "google"
diff --git a/run.sh b/run.sh
deleted file mode 100755
index 4f8e79b..0000000
--- a/run.sh
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/usr/bin/env bash
-
-PYTHONPATH=$PWD exec python -u function/main.py --insecure --debug
diff --git a/design/run_function.proto b/scripts/run_function.proto
similarity index 91%
rename from design/run_function.proto
rename to scripts/run_function.proto
index b67c085..557fd34 100644
--- a/design/run_function.proto
+++ b/scripts/run_function.proto
@@ -27,7 +27,7 @@ package apiextensions.fn.proto.v1;
 import "google/protobuf/duration.proto";
 import "google/protobuf/struct.proto";
 
-option go_package = "github.com/crossplane/crossplane/proto/fn/v1";
+option go_package = "github.com/crossplane/crossplane/v2/proto/fn/v1";
 
 // A FunctionRunnerService is a function.
 service FunctionRunnerService {
@@ -69,15 +69,27 @@ message RunFunctionRequest {
 
   // Optional resources that the function specified in its requirements. Note
   // that resources is a map to Resources, plural. The map key corresponds to
-  // the key in a RunFunctionResponse's requirements.resources field. If a
-  // function requested required resources that did not exist, Crossplane sets
+  // the key in a RunFunctionResponse's requirements.extra_resources field. If a
+  // function requested extra resources that did not exist, Crossplane sets
   // the map key to an empty Resources message to indicate that it attempted to
-  // satisfy the request.
-  map<string, Resources> required_resources = 6;
+  // satisfy the request. This field is only populated when the function uses
+  // extra_resources in its requirements.
+  //
+  // Deprecated: Use required_resources instead.
+  map<string, Resources> extra_resources = 6 [deprecated = true];
 
   // Optional credentials that this function may use to communicate with an
   // external system.
   map<string, Credentials> credentials = 7;
+
+  // Optional resources that the function specified in its requirements. Note
+  // that resources is a map to Resources, plural. The map key corresponds to
+  // the key in a RunFunctionResponse's requirements.resources field. If a
+  // function requested required resources that did not exist, Crossplane sets
+  // the map key to an empty Resources message to indicate that it attempted to
+  // satisfy the request. This field is only populated when the function uses
+  // resources in its requirements.
+  map<string, Resources> required_resources = 8;
 }
 
 // Credentials that a function may use to communicate with an external system.
@@ -150,7 +162,13 @@ message RequestMeta {
 message Requirements {
   // Resources that this function requires. The map key uniquely identifies the
   // group of resources.
-  map<string, ResourceSelector> resources = 1;
+  //
+  // Deprecated: Use resources instead.
+  map<string, ResourceSelector> extra_resources = 1 [deprecated = true];
+
+  // Resources that this function requires. The map key uniquely identifies the
+  // group of resources.
+  map<string, ResourceSelector> resources = 2;
 }
 
 // ResourceSelector selects a group of resources, either by name or by label.
@@ -349,4 +367,4 @@ enum Status {
   STATUS_CONDITION_TRUE = 2;
 
   STATUS_CONDITION_FALSE = 3;
-}
+}
\ No newline at end of file
diff --git a/scripts/setup-local.sh b/scripts/setup-local.sh
new file mode 100755
index 0000000..afd1c9e
--- /dev/null
+++ b/scripts/setup-local.sh
@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+
+helm upgrade --install crossplane --namespace crossplane-system --create-namespace crossplane-preview/crossplane --version v2.0.0-preview.1
+
+kubectl apply -f - <<EOF
+apiVersion: pkg.crossplane.io/v1beta1
+kind: DeploymentRuntimeConfig
+metadata:
+  name: provider-incluster
+spec:
+  deploymentTemplate:
+    spec:
+      selector: {}
+      template:
+        spec:
+          containers:
+          - name: package-runtime
+            args:
+            - --debug
+          serviceAccountName: provider-incluster
+  serviceAccountTemplate:
+    metadata:
+      name: provider-incluster
+EOF
+
+kubectl apply -f - <<EOF
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: provider-incluster
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+- kind: ServiceAccount
+  name: provider-incluster
+  namespace: crossplane-system
+EOF
+
+kubectl apply -f - <<EOF
+apiVersion: pkg.crossplane.io/v1
+kind: Provider
+metadata:
+  name: provider-helm
+spec:
+  package: xpkg.upbound.io/crossplane-contrib/provider-helm:v0.21.0
+  runtimeConfigRef:
+    apiVersion: pkg.crossplane.io/v1beta1
+    kind: DeploymentRuntimeConfig
+    name: provider-incluster
+EOF
+
+kubectl apply -f - <<EOF
+apiVersion: helm.crossplane.io/v1beta1
+kind: ProviderConfig
+metadata:
+  name: default
+spec:
+  credentials:
+    source: InjectedIdentity
+EOF
+
+kubectl apply -f - <<EOF
+apiVersion: pkg.crossplane.io/v1
+kind: Provider
+metadata:
+  name: provider-kubernetes
+spec:
+  package: xpkg.upbound.io/crossplane-contrib/provider-kubernetes:v0.18.0
+  runtimeConfigRef:
+    apiVersion: pkg.crossplane.io/v1beta1
+    kind: DeploymentRuntimeConfig
+    name: provider-incluster
+EOF
+
+kubectl apply -f - <<EOF
+apiVersion: kubernetes.crossplane.io/v1alpha1
+kind: ProviderConfig
+metadata:
+  name: default
+spec:
+  credentials:
+    source: InjectedIdentity
+EOF
+
+#  package: ghcr.io/fortra/function-pythonic:v0.0.3
+
+kubectl apply -f - <<EOF
+apiVersion: pkg.crossplane.io/v1
+kind: Function
+metadata:
+  name: function-pythonic
+spec:
+  package: ghcr.io/iciclespider/function-pythonic:v0.0.0-20250811193238-f8d5c82deb9b
+  runtimeConfigRef:
+    apiVersion: pkg.crossplane.io/v1beta1
+    kind: DeploymentRuntimeConfig
+    name: provider-incluster
+EOF
diff --git a/tests/fn_cases/clazz.py b/tests/fn_cases/clazz.py
new file mode 100644
index 0000000..e2d25de
--- /dev/null
+++ b/tests/fn_cases/clazz.py
@@ -0,0 +1,5 @@
+class TestComposite(BaseComposite):
+    def compose(self):
+        self.resources.bucket.apiVersion = 's3.aws.upbound.io/v1beta2'
+        self.resources.bucket.kind = 'Bucket'
+        self.resources.bucket.spec.forProvider.region = 'us-east-1'
diff --git a/tests/fn_cases/clazz.yaml b/tests/fn_cases/clazz.yaml
new file mode 100644
index 0000000..e5dc6f6
--- /dev/null
+++ b/tests/fn_cases/clazz.yaml
@@ -0,0 +1,14 @@
+request:
+  input:
+    composite: tests.fn_cases.clazz.TestComposite
+
+response:
+  desired:
+    resources:
+      bucket:
+        resource:
+          apiVersion: s3.aws.upbound.io/v1beta2
+          kind: Bucket
+          spec:
+            forProvider:
+              region: us-east-1
diff --git a/tests/test_fn.py b/tests/test_fn.py
index 5000c45..e497d49 100644
--- a/tests/test_fn.py
+++ b/tests/test_fn.py
@@ -7,7 +7,7 @@
 from crossplane.function.proto.v1 import run_function_pb2 as fnv1
 from google.protobuf import json_format
 
-from function import fn
+from crossplane.pythonic import function
 from tests import utils
 
 
@@ -50,7 +50,7 @@ async def test_run_function(fn_case):
     })
 
     response = utils.message_dict(
-        await fn.FunctionRunner().RunFunction(request, None)
+        await function.FunctionRunner().RunFunction(request, None)
     )
 
     assert response == test['response']
diff --git a/tests/test_protobuf_values.py b/tests/test_protobuf_values.py
index dbac55f..db3a612 100644
--- a/tests/test_protobuf_values.py
+++ b/tests/test_protobuf_values.py
@@ -1,5 +1,5 @@
 
-from function import protobuf
+from crossplane.pythonic import protobuf
 
 
 def test_map():