Add MLX-LM support (CPU only) (#4)

* Add MLX-LM support (CPU only)
* Fix 401 Client Error: Unauthorized for url: https://huggingface.co/api/whoami-v2
* Add FLOWER_APPS settings (comma-separated values)
* Add CA cert download for approved participants

blossomtune_gradio/config.py

@@ -37,3 +37,11 @@ BLOSSOMTUNE_TLS_CERT_PATH = os.getenv(
     if os.path.isdir("/data/certs")
     else "./data/certs/server.crt",
 )
+
+# Flower Apps
+FLOWER_APPS = os.getenv("FLOWER_APPS", ["flower_apps.quickstart_huggingface"])
+FLOWER_APPS = (
+    FLOWER_APPS
+    if isinstance(FLOWER_APPS, list)
+    else [app.strip() for app in FLOWER_APPS.split(",")]
+)

blossomtune_gradio/federation.py

@@ -45,16 +45,16 @@ def check_participant_status(pid_to_check: str, email: str, activation_code: str
     # Case 1: New user registration
     if result is None:
         if activation_code:
-            return (False, settings.get_text("activation_invalid_md"))
+            return (False, settings.get_text("activation_invalid_md"), None)
         if not util.validate_email(email):
-            return (False, settings.get_text("invalid_email_md"))
+            return (False, settings.get_text("invalid_email_md"), None)
 
         with sqlite3.connect(cfg.DB_PATH) as conn:
             cursor = conn.cursor()
             cursor.execute("SELECT COUNT(*) FROM requests WHERE status = 'approved'")
             approved_count = cursor.fetchone()[0]
             if approved_count >= cfg.MAX_NUM_NODES:
-                return (False, settings.get_text("federation_full_md"))
+                return (False, settings.get_text("federation_full_md"), None)
 
         participant_id = generate_participant_id()
         new_activation_code = generate_activation_code()
@@ -73,9 +73,9 @@ def check_participant_status(pid_to_check: str, email: str, activation_code: str
                         0,
                     ),
                 )
-            return (True, settings.get_text("registration_submitted_md"))
+            return (True, settings.get_text("registration_submitted_md"), None)
         else:
-            return (False, message)
+            return (False, message, None)
 
     # Existing user
     participant_id, status, partition_id, is_activated, stored_code = result
@@ -88,9 +88,9 @@ def check_participant_status(pid_to_check: str, email: str, activation_code: str
                     "UPDATE requests SET is_activated = 1 WHERE hf_handle = ?",
                     (pid_to_check,),
                 )
-            return (True, settings.get_text("activation_successful_md"))
+            return (True, settings.get_text("activation_successful_md"), None)
         else:
-            return (False, settings.get_text("activation_invalid_md"))
+            return (False, settings.get_text("activation_invalid_md"), None)
     else:
         if not activation_code:
             return (False, settings.get_text("missing_activation_code_md"))
@@ -111,13 +111,15 @@ def check_participant_status(pid_to_check: str, email: str, activation_code: str
             superlink_hostname=superlink_hostname,
             num_partitions=num_partitions,
         )
-        return True, connection_string
+        # TODO: build and provide .blossomfile for download
+        return (True, connection_string, cfg.BLOSSOMTUNE_TLS_CERT_PATH)
     elif status == "pending":
         return (False, settings.get_text("status_pending_md"))
     else:  # Denied
         return (
             False,
             settings.get_text("status_denied_md", participant_id=participant_id),
+            None,
         )
 
 

blossomtune_gradio/gradio_app.py

@@ -32,6 +32,7 @@ with gr.Blocks(theme=gr.themes.Soft(), title="Flower Superlink & Runner") as dem
             )
             check_status_btn = gr.Button("Submit Request / Activate", variant="primary")
             request_status_md = components.request_status_md.render()
+            ca_cert_download = components.ca_cert_download.render()
             check_status_btn.click(
                 fn=callbacks.on_check_participant_status,
                 inputs=[hf_handle_tb, email_tb, activation_code_tb],

blossomtune_gradio/ui/auth.py

@@ -1,5 +1,6 @@
 import gradio as gr
 from huggingface_hub import whoami
+from requests.exceptions import HTTPError
 
 
 from blossomtune_gradio import config as cfg
@@ -10,7 +11,10 @@ def is_space_owner(profile: gr.OAuthProfile | None, oauth_token: gr.OAuthToken |
     if cfg.SPACE_OWNER is None:
         return True
     if oauth_token:
-        org_names = [org["name"] for org in whoami(oauth_token.token)["orgs"]]
+        try:
+            org_names = [org["name"] for org in whoami(oauth_token.token)["orgs"]]
+        except HTTPError:
+            return False
     else:
         org_names = []
     return profile is not None and (

blossomtune_gradio/ui/callbacks.py

@@ -203,10 +203,15 @@ def on_check_participant_status(
     email_to_add = email.strip()
     activation_code_to_check = activation_code.strip()
     # The federation module is responsible for getting the correct text from settings
-    _, message = fed.check_participant_status(
+    _, message, download = fed.check_participant_status(
         pid_to_check, email_to_add, activation_code_to_check
     )
-    return {components.request_status_md: gr.update(value=message)}
+    return {
+        components.request_status_md: gr.update(value=message),
+        components.ca_cert_download: gr.update(
+            value=download or "", visible=True if download else False
+        ),
+    }
 
 
 def on_manage_fed_request(participant_id: str, partition_id: str, action: str):

blossomtune_gradio/ui/components.py

@@ -1,4 +1,5 @@
 import gradio as gr
+from blossomtune_gradio import config as cfg
 
 
 # This component's value is updated dynamically by callbacks.
@@ -47,9 +48,8 @@ runner_status_txt = gr.Textbox(
 )
 runner_toggle_btn = gr.Button("▶️ Start Federated Run", variant="primary")
 runner_app_dd = gr.Dropdown(
-    ["flower_apps.quickstart_huggingface"],
+    cfg.FLOWER_APPS,
     label="Select Runner App",
-    value="flower_apps.quickstart_huggingface",
     render=False,
 )
 run_id_tb = gr.Textbox(label="Run ID", placeholder="e.g., run_123")
@@ -88,3 +88,6 @@ partition_id_tb = gr.Textbox(
     placeholder="Auto-filled on selection...",
     render=False,
 )
+ca_cert_download = gr.File(
+    label="Download CA Certificate (ca.crt)", visible=False, render=False
+)

pyproject.toml

@@ -70,6 +70,8 @@ convention = "google"  # Accepts: "google", "numpy", or "pep257".
 dev = [
     "cryptography>=44.0.3",
     "dnspython>=2.8.0",
+    "mlx-lm>=0.28.2",
+    "mlx[cpu]>=0.29.2",
     "pytest>=8.4.1",
     "pytest-mock>=3.15.1",
 ]

tests/test_federation.py

@@ -45,10 +45,11 @@ class TestCheckParticipantStatus:
     ):
         """Verify successful registration for a new user."""
         mock_mail.return_value = (True, "")
-        success, message = fed.check_participant_status(
+        success, message, download = fed.check_participant_status(
             "new_user", "new@example.com", ""
         )
         assert success is True
+        assert download is None
         assert message == "mock_registration_submitted_md"
 
         # Verify the user was added to the database
@@ -58,17 +59,21 @@ class TestCheckParticipantStatus:
 
     def test_new_user_invalid_email(self, in_memory_db, mock_settings):
         """Verify registration fails with an invalid email."""
-        success, message = fed.check_participant_status("user", "invalid-email", "")
+        success, message, download = fed.check_participant_status(
+            "user", "invalid-email", ""
+        )
         assert success is False
+        assert download is None
         assert message == "mock_invalid_email_md"
 
     def test_new_user_federation_full(self, in_memory_db, mock_settings, mocker):
         """Verify registration fails when the federation is full."""
         mocker.patch("blossomtune_gradio.federation.cfg.MAX_NUM_NODES", 0)
-        success, message = fed.check_participant_status(
+        success, message, download = fed.check_participant_status(
             "another_user", "another@example.com", ""
         )
         assert success is False
+        assert download is None
         assert message == "mock_federation_full_md"
 
     def test_user_activation_success(self, in_memory_db, mock_settings):
@@ -81,10 +86,11 @@ class TestCheckParticipantStatus:
         )
         in_memory_db.commit()
 
-        success, message = fed.check_participant_status(
+        success, message, download = fed.check_participant_status(
             "test_user", "test@example.com", "ABCDEF"
         )
         assert success is True
+        assert download is None
         assert message == "mock_activation_successful_md"
         # Verify the user is now activated
         cursor.execute(
@@ -102,10 +108,11 @@ class TestCheckParticipantStatus:
         )
         in_memory_db.commit()
 
-        success, message = fed.check_participant_status(
+        success, message, download = fed.check_participant_status(
             "test_user", "test@example.com", "WRONGCODE"
         )
         assert success is False
+        assert download is None
         assert message == "mock_activation_invalid_md"
 
     def test_status_check_approved(self, in_memory_db, mock_settings):
@@ -125,10 +132,11 @@ class TestCheckParticipantStatus:
             ),
         )
         in_memory_db.commit()
-        success, message = fed.check_participant_status(
+        success, message, download = fed.check_participant_status(
             "approved_user", "approved@example.com", "GHIJKL"
         )
         assert success is True
+        assert download is not None
         assert "mock_status_approved_md" in message
 
 

uv.lock

@@ -243,6 +243,8 @@ dependencies = [
 dev = [
     { name = "cryptography" },
     { name = "dnspython" },
+    { name = "mlx", extra = ["cpu"] },
+    { name = "mlx-lm" },
     { name = "pytest" },
     { name = "pytest-mock" },
 ]
@@ -265,6 +267,8 @@ requires-dist = [
 dev = [
     { name = "cryptography", specifier = ">=44.0.3" },
     { name = "dnspython", specifier = ">=2.8.0" },
+    { name = "mlx", extras = ["cpu"], specifier = ">=0.29.2" },
+    { name = "mlx-lm", specifier = ">=0.28.2" },
     { name = "pytest", specifier = ">=8.4.1" },
     { name = "pytest-mock", specifier = ">=3.15.1" },
 ]
@@ -1364,6 +1368,68 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/b3/38/89ba8ad64ae25be8de66a6d463314cf1eb366222074cfda9ee839c56a4b4/mdurl-0.1.2-py3-none-any.whl", hash = "sha256:84008a41e51615a49fc9966191ff91509e3c40b939176e643fd50a5c2196b8f8", size = 9979, upload-time = "2022-08-14T12:40:09.779Z" },
 ]
 
+[[package]]
+name = "mlx"
+version = "0.29.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "mlx-metal", marker = "sys_platform == 'darwin'" },
+]
+wheels = [
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+]
+
+[package.optional-dependencies]
+cpu = [
+    { name = "mlx-cpu", marker = "sys_platform == 'linux'" },
+]
+
+[[package]]
+name = "mlx-cpu"
+version = "0.29.2"
+source = { registry = "https://pypi.org/simple" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/3d/3a/5f2246e0f68477c141b76da3afaabf0b7b8565eba12451482b3b164df762/mlx_cpu-0.29.2-py3-none-manylinux_2_35_x86_64.whl", hash = "sha256:209f6f587ee4bbff3fd18e5201e150880812cef39e1af2c102d7e8e681f06749", size = 10170075, upload-time = "2025-09-26T22:28:40.523Z" },
+]
+
+[[package]]
+name = "mlx-lm"
+version = "0.28.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "jinja2" },
+    { name = "mlx" },
+    { name = "numpy" },
+    { name = "protobuf" },
+    { name = "pyyaml" },
+    { name = "transformers" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/1c/d7/fdde445c7bd443a2ed23badda6064f1477c4051543922106f365e94082cd/mlx_lm-0.28.2.tar.gz", hash = "sha256:d28752635ed5c89ff2b41361916c928e6b16f765c07b2908044e1dcaf921ed9b", size = 209374, upload-time = "2025-10-02T14:23:57.497Z" }
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+]
+
+[[package]]
+name = "mlx-metal"
+version = "0.29.2"
+source = { registry = "https://pypi.org/simple" }
+wheels = [
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+]
+
 [[package]]
 name = "mpmath"
 version = "1.3.0"
@@ -2782,10 +2848,10 @@ dependencies = [
     { name = "typing-extensions", marker = "sys_platform == 'darwin'" },
 ]
 wheels = [
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp311-none-macosx_11_0_arm64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp312-none-macosx_11_0_arm64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp313-cp313t-macosx_14_0_arm64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp313-none-macosx_11_0_arm64.whl" },
+    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp311-none-macosx_11_0_arm64.whl", hash = "sha256:3d05017d19bc99741288e458888283a44b0ee881d53f05f72f8b1cfea8998122" },
+    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp312-none-macosx_11_0_arm64.whl", hash = "sha256:a47b7986bee3f61ad217d8a8ce24605809ab425baf349f97de758815edd2ef54" },
+    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp313-cp313t-macosx_14_0_arm64.whl", hash = "sha256:fbe2e149c5174ef90d29a5f84a554dfaf28e003cb4f61fa2c8c024c17ec7ca58" },
+    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0-cp313-none-macosx_11_0_arm64.whl", hash = "sha256:057efd30a6778d2ee5e2374cd63a63f63311aa6f33321e627c655df60abdd390" },
 ]
 
 [[package]]
@@ -2807,24 +2873,24 @@ dependencies = [
     { name = "typing-extensions", marker = "sys_platform != 'darwin'" },
 ]
 wheels = [
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp311-cp311-linux_s390x.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp311-cp311-manylinux_2_28_aarch64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp311-cp311-manylinux_2_28_x86_64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp311-cp311-win_amd64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp311-cp311-win_arm64.whl" },
-    { url = "https://download.pytorch.org/whl/cpu/torch-2.8.0%2Bcpu-cp312-cp312-linux_s390x.whl" },
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 ]
 
 [[package]]