Add support for deploying HoloViz Panel applications (#709)

* Add support for deploying HoloViz Panel applications

This change adds support for deploying HoloViz Panel applications to Posit Connect.
Panel is a popular Python framework for creating interactive dashboards and data apps.

Changes include:
- Added PYTHON_PANEL app mode (mode 18) to models.py
- Added deploy and write-manifest commands for Panel apps in main.py
- Added comprehensive tests for Panel manifest and bundle creation
- Added test data files for Panel app testing

This requires Posit Connect release 2025.10.0 or later.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

* formatting

* chores for adding panel app mode

* Update rsconnect/models.py

Co-authored-by: E. David Aja <[email protected]>

* Update docs/index.md

---------

Co-authored-by: Claude <[email protected]>
Co-authored-by: E. David Aja <[email protected]>

Author: 3 people

docs/CHANGELOG.md

@@ -14,6 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   tool that returns parameter schemas for any rsconnect command, allowing LLMs
   to more easily construct valid CLI commands.
 
+- support for deploying Holoviz Panel applications
+
 ### Fixed
 
 - Snowflake SPCS (Snowpark Container Services) authentication now properly handles API keys

docs/deploying.md

@@ -115,9 +115,10 @@ You can deploy a variety of APIs and applications using sub-commands of the
 * `streamlit`: Streamlit apps
 * `bokeh`: Bokeh server apps
 * `gradio`: Gradio apps
+* `panel`: HoloViz Panel apps
 
 All options below apply equally to the `api`, `fastapi`, `dash`, `streamlit`,
-`gradio`, and `bokeh` sub-commands.
+`gradio`, `bokeh`, and `panel` sub-commands.
 
 #### Including Extra Files
 
@@ -297,7 +298,7 @@ rsconnect deploy notebook --title "My Notebook" my-notebook.ipynb
 ```
 
 When using `rsconnect deploy api`, `rsconnect deploy fastapi`, `rsconnect deploy dash`,
-`rsconnect deploy streamlit`, `rsconnect deploy bokeh`, or `rsconnect deploy gradio`,
+`rsconnect deploy streamlit`, `rsconnect deploy bokeh`, `rsconnect deploy gradio`, or `rsconnect deploy panel`,
 the title is derived from the directory containing the API or application.
 
 When using `rsconnect deploy manifest`, the title is derived from the primary

docs/index.md

@@ -3,7 +3,7 @@
 This package provides a (command-line interface) CLI for interacting
 with and deploying to Posit Connect. Many types of content supported by Posit
 Connect may be deployed by this package, including WSGI-style APIs, Dash, Streamlit,
-Gradio, and Bokeh applications.
+Gradio, Bokeh, and Panel applications.
 
 Content types not directly supported by the CLI may also be deployed if they include a
 prepared `manifest.json` file. See ["Deploying R or Other

docs/server-administration.md

@@ -158,7 +158,7 @@ rsconnect content search --help
 #   -c, --cacert FILENAME           The path to trusted TLS CA certificates.
 #   --published                     Search only published content.
 #   --unpublished                   Search only unpublished content.
-#   --content-type [unknown|shiny|rmd-static|rmd-shiny|static|api|tensorflow-saved-model|jupyter-static|python-api|python-dash|python-streamlit|python-bokeh|python-fastapi|python-gradio|quarto-shiny|quarto-static]
+#   --content-type [unknown|shiny|rmd-static|rmd-shiny|static|api|tensorflow-saved-model|jupyter-static|python-api|python-dash|python-streamlit|python-bokeh|python-panel|python-fastapi|python-gradio|quarto-shiny|quarto-static]
 #                                   Filter content results by content type.
 #   --r-version VERSIONSEARCHFILTER
 #                                   Filter content results by R version.

rsconnect/main.py

@@ -1871,6 +1871,7 @@ def deploy_app(
 generate_deploy_python(app_mode=AppModes.BOKEH_APP, alias="bokeh", min_version="1.8.4")
 generate_deploy_python(app_mode=AppModes.PYTHON_SHINY, alias="shiny", min_version="2022.07.0")
 generate_deploy_python(app_mode=AppModes.PYTHON_GRADIO, alias="gradio", min_version="2024.12.0")
+generate_deploy_python(app_mode=AppModes.PYTHON_PANEL, alias="panel", min_version="2025.10.0")
 
 
 @deploy.command(
@@ -2408,6 +2409,7 @@ def manifest_writer(
 generate_write_manifest_python(AppModes.PYTHON_SHINY, alias="shiny")
 generate_write_manifest_python(AppModes.STREAMLIT_APP, alias="streamlit")
 generate_write_manifest_python(AppModes.PYTHON_GRADIO, alias="gradio")
+generate_write_manifest_python(AppModes.PYTHON_PANEL, alias="panel")
 
 
 # noinspection SpellCheckingInspection
@@ -2428,7 +2430,7 @@ def _write_framework_manifest(
     env_management_r: Optional[bool],
 ):
     """
-    A common function for writing manifests for APIs as well as Dash, Streamlit, and Bokeh apps.
+    A common function for writing manifests for APIs as well as Dash, Streamlit, Bokeh, and Panel apps.
 
     :param overwrite: overwrite the manifest.json, if it exists.
     :param entrypoint: the entry point for the thing being deployed.

rsconnect/models.py

@@ -98,6 +98,7 @@ class AppModes:
     PYTHON_SHINY = AppMode(15, "python-shiny", "Python Shiny Application")
     JUPYTER_VOILA = AppMode(16, "jupyter-voila", "Jupyter Voila Application")
     PYTHON_GRADIO = AppMode(17, "python-gradio", "Gradio Application")
+    PYTHON_PANEL = AppMode(18, "python-panel", "Panel Application")
 
     _modes = [
         UNKNOWN,
@@ -118,6 +119,7 @@ class AppModes:
         PYTHON_SHINY,
         JUPYTER_VOILA,
         PYTHON_GRADIO,
+        PYTHON_PANEL,
     ]
 
     Modes = Literal[
@@ -139,6 +141,7 @@ class AppModes:
         "python-shiny",
         "jupyter-voila",
         "python-gradio",
+        "python-panel",
     ]
 
     _cloud_to_connect_modes = {

tests/test_bundle.py

@@ -2868,6 +2868,76 @@ def test_make_api_bundle_gradio():
         assert gradio_dir_ans["files"].keys() == bundle_json["files"].keys()
 
 
+panel_dir = os.path.join(cur_dir, "./testdata/panel")
+panel_file = os.path.join(cur_dir, "./testdata/panel/app.py")
+
+
+def test_make_api_manifest_panel():
+    panel_dir_ans = {
+        "version": 1,
+        "locale": "en_US.UTF-8",
+        "metadata": {"appmode": "python-panel"},
+        "python": {
+            "version": "3.8.12",
+            "package_manager": {"name": "pip", "version": "23.0.1", "package_file": "requirements.txt"},
+        },
+        "files": {
+            "requirements.txt": {"checksum": "f90113cfbf5f67bfa6c5c6a5a8bc7eaa"},
+            "app.py": {"checksum": "e3b0c44298fc1c149afbf4c8996fb924"},
+        },
+    }
+    environment = Environment.create_python_environment(
+        panel_dir,
+    )
+    manifest, _ = make_api_manifest(
+        panel_dir,
+        None,
+        AppModes.PYTHON_PANEL,
+        environment,
+        None,
+        None,
+    )
+
+    assert panel_dir_ans["metadata"] == manifest["metadata"]
+    assert panel_dir_ans["files"].keys() == manifest["files"].keys()
+
+
+def test_make_api_bundle_panel():
+    panel_dir_ans = {
+        "version": 1,
+        "locale": "en_US.UTF-8",
+        "metadata": {"appmode": "python-panel"},
+        "python": {
+            "version": "3.8.12",
+            "package_manager": {"name": "pip", "version": "23.0.1", "package_file": "requirements.txt"},
+        },
+        "files": {
+            "requirements.txt": {"checksum": "f90113cfbf5f67bfa6c5c6a5a8bc7eaa"},
+            "app.py": {"checksum": "e3b0c44298fc1c149afbf4c8996fb924"},
+        },
+    }
+    environment = Environment.create_python_environment(
+        panel_dir,
+    )
+    with make_api_bundle(
+        panel_dir,
+        None,
+        AppModes.PYTHON_PANEL,
+        environment,
+        None,
+        None,
+    ) as bundle, tarfile.open(mode="r:gz", fileobj=bundle) as tar:
+        names = sorted(tar.getnames())
+        assert names == [
+            "app.py",
+            "manifest.json",
+            "requirements.txt",
+        ]
+        bundle_json = json.loads(tar.extractfile("manifest.json").read().decode("utf-8"))
+        assert panel_dir_ans["metadata"] == bundle_json["metadata"]
+        assert panel_dir_ans["files"].keys() == bundle_json["files"].keys()
+
+
 empty_manifest_file = os.path.join(cur_dir, "./testdata/Manifest_data/empty_manifest.json")
 missing_file_manifest = os.path.join(cur_dir, "./testdata/Manifest_data/missing_file_manifest.json")
 

tests/testdata/panel/app.py

@@ -0,0 +1,24 @@
+import panel as pn
+
+pn.extension()
+
+
+def greet(name):
+    return f"Hello, {name}!"
+
+
+text_input = pn.widgets.TextInput(name="Enter your name", placeholder="Type here...")
+button = pn.widgets.Button(name="Greet", button_type="primary")
+
+output = pn.pane.Markdown("Click the button to see a greeting!")
+
+
+def update_output(event):
+    output.object = greet(text_input.value)
+
+
+button.on_click(update_output)
+
+app = pn.Column("# Panel Greeting App", text_input, button, output)
+
+app.servable()

tests/testdata/panel/requirements.txt

@@ -0,0 +1 @@
+panel