docker: add the AGPL-3.0 SPDX header to the new Python files

Every new .py this PR adds now carries the same two-line SPDX header the other
new files in the branch already use (docker/jupyter/unsloth_branding.py), with
the shebang kept first where present. Matches the licensing laid out in
docker/NOTICE: the image bundles Studio (AGPL-3.0) while Unsloth Core stays
Apache-2.0.

docker/fetch_llama_prebuilt.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Bake a pinned llama.cpp prebuilt into the Docker image, deterministically.
 
 Why not studio/install_llama_prebuilt.py: that resolver selects a bundle for

docker/jupyter/install_sloth_stickers.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Install the Unsloth Studio sloth stickers for the JupyterLab login screen.
 
 The branded login page (login.html) shows a different sloth sticker on each

docker/smoke_test.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """
 Smoke test for the unsloth-blackwell image.
 

docker/unsloth_colab_compat.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Colab cell-magic compatibility for the Unsloth Docker notebooks.
 
 Colab cells often look like:

docker/unsloth_ipython_startup.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Baked IPython startup hook (copied to the profile's startup/ dir).
 
 Runs once per kernel. Registers a pre_run_cell event that activates the right

docker/unsloth_nb_compat.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Per-notebook transformers version activation for the Unsloth Docker image.
 
 Problem: unslothai/notebooks pin many different transformers versions in their

docker/unsloth_nb_content_sig.py

@@ -1,26 +1,7 @@
 #!/usr/bin/env python3
-# Compare the *content* of two Unsloth notebooks, ignoring the auto-generated
-# top/bottom boilerplate that update_all_notebooks.py stamps on every notebook.
-#
-# Every generated notebook has the same shape:
-#   - a "top" of boilerplate: the "To run this, press Runtime" announcement, the
-#     "### News" / Unsloth Studio announcement cells, and the %%capture install
-#     cell. These churn constantly (new pip pins, new announcements, new links).
-#   - the "middle": the actual tutorial (data prep, train, inference, save).
-#   - a "bottom": the "And we're done ... licensed LGPL-3.0" footer cell.
-#
-# The boot-time notebook refresh uses this to avoid rewriting a user's notebook
-# when only that boilerplate moved upstream. We hash ONLY the middle (the cells
-# that are not install/announcement/footer) and compare. Outputs, execution
-# counts, cell ids and metadata are ignored, so merely running a notebook never
-# changes the signature.
-#
-# Usage:
-#   unsloth_nb_content_sig.py <a.ipynb> <b.ipynb>   -> prints SAME | DIFF | ERR
-#   unsloth_nb_content_sig.py <a.ipynb>             -> prints the middle digest
-#
-# Exit code is always 0; the decision is the printed word. On any parse problem
-# we print ERR / nothing so the caller can fall back to its whole-file logic.
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 import hashlib
 import json
 import sys

docker/unsloth_nb_pip_magic.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Route notebook `%pip` / `%uv` / `python -m pip` installs through the shim.
 
 The PATH shim (/opt/unsloth-nb/bin/{pip,pip3,uv} -> unsloth_pip_shim.py) only

docker/unsloth_nb_strip_colab.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 # Remove the Colab-only "how to run" sentence from Unsloth notebooks for Docker.
 #
 # Every generated notebook opens with a first markdown cell whose first line is a

docker/unsloth_nb_view.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 # Build a categorized, Colab-like folder VIEW of the Unsloth notebooks.
 #
 # The canonical notebooks live under DEST/nb/<file>.ipynb (a mirror of

docker/unsloth_pip_shim.py

@@ -1,4 +1,7 @@
 #!/opt/unsloth-venv/bin/python
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """pip / uv shim for the Unsloth Docker notebook environment.
 
 Installed earlier on PATH than the real tools so a notebook's `!pip install ...`

docker/unsloth_run.py

@@ -1,4 +1,7 @@
 #!/opt/unsloth-venv/bin/python
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """unsloth-run: execute an unslothai/notebooks notebook unchanged, headless.
 
 The robust driven path for the Docker image: it reads the notebook, figures out

tests/python/test_unsloth_nb_pip_magic.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Regression tests for docker/unsloth_nb_pip_magic.py.
 
 The input transformer rewrites explicit `!<python> -m pip|uv ...` shell lines

tests/python/test_unsloth_pip_shim.py

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Regression tests for docker/unsloth_pip_shim.py.
 
 The shim sits ahead of the real pip/uv on PATH inside the Unsloth Docker

tests/validate_studio_features.py

@@ -1,4 +1,7 @@
 #!/usr/bin/env python3
+# SPDX-License-Identifier: AGPL-3.0-only
+# Copyright 2026-Present the Unsloth team. See /studio/LICENSE.AGPL-3.0
+
 """Cross-platform validation of the Unsloth Docker JupyterLab/notebook features.
 
 Runs WITHOUT Docker or a GPU, so it can execute on the Linux/macOS/Windows CI