fix colab links as needed, add CI check for colab link

Author: fedorov

notebooks/advanced_topics/gcs_aws_direct_access.ipynb

@@ -23,7 +23,7 @@
     "colab_type": "text"
    },
    "source": [
-    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/noteboooks/advanced_topics/gcs_aws_direct_access.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/advanced_topics/gcs_aws_direct_access.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {

notebooks/advanced_topics/idc_on_aws/idc-on-aws-tutorial.ipynb

@@ -1,5 +1,13 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/advanced_topics/idc_on_aws/idc-on-aws-tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+   ],
+   "id": "17e6bac3-1823-4ddd-8f38-343406dbe974"
+  },
   {
    "cell_type": "markdown",
    "id": "325cda63-60b6-49b5-b4db-dd5ea2a62ed4",

notebooks/analysis/mhubai_tutorial.ipynb

@@ -28,7 +28,7 @@
     "colab_type": "text"
    },
    "source": [
-    "<a href=\"https://colab.research.google.com/github/MHubAI/examples/blob/main/notebooks/PW41_tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/analysis/mhubai_tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {

notebooks/collections_demos/rms_mutation_prediction/RMS-Mutation-Prediction-Expert-Annotations_BigQuery.ipynb

@@ -4,7 +4,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/collections_demos/rms_mutation_prediction/RMS-Mutation-Prediction-Expert-Annotations_exploration.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/collections_demos/rms_mutation_prediction/RMS-Mutation-Prediction-Expert-Annotations_BigQuery.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {
@@ -202,7 +202,7 @@
        "    </tr>\n",
        "  </tbody>\n",
        "</table>\n",
-       "<p>680 rows × 3 columns</p>\n",
+       "<p>680 rows \u00d7 3 columns</p>\n",
        "</div>\n",
        "    <div class=\"colab-df-buttons\">\n",
        "\n",

notebooks/labs/idc_mhub_miccai23.ipynb

@@ -815,7 +815,7 @@
     "colab_type": "text"
    },
    "source": [
-    "<a href=\"https://colab.research.google.com/github/MHubAI/examples/blob/miccai23/notebooks/MICCAI23_tutorial.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+    "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/labs/idc_mhub_miccai23.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
    ]
   },
   {

test/src/check_notebook_standards.py

@@ -4,6 +4,7 @@
   2. Include a "## Acknowledgments" section
   3. Reference the IDC-Tutorials repository for additional tutorials
   4. Include an "Updated: <Month> <Year>" field
+  5. Include a correct Colab badge link pointing to the notebook's own path
 """
 
 import json
@@ -28,6 +29,11 @@
 
 IDC_TUTORIALS_URL = "github.com/ImagingDataCommons/IDC-Tutorials"
 
+COLAB_PREFIX = "https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/"
+COLAB_LINK_RE = re.compile(
+    r'https://colab\.research\.google\.com/github/[^">\s]+'
+)
+
 
 def get_markdown_sources(notebook_path):
     """Return a list of concatenated source strings for each markdown cell."""
@@ -48,6 +54,7 @@ def get_markdown_sources(notebook_path):
 def check_notebook(notebook_path):
     """Check a single notebook for required standards. Returns list of issues."""
     issues = []
+    rel_path = notebook_path.relative_to(NOTEBOOKS_DIR.parent)
     cells = get_markdown_sources(notebook_path)
     all_text = "\n".join(cells)
 
@@ -69,6 +76,21 @@ def check_notebook(notebook_path):
     if not UPDATED_RE.search(all_text):
         issues.append("Missing 'Updated: <Month> <Year>' field (e.g., 'Updated: Feb 2026')")
 
+    # Check 5: Colab badge link exists and points to correct path
+    expected_colab_url = COLAB_PREFIX + str(rel_path)
+    colab_links = COLAB_LINK_RE.findall(all_text)
+    if not colab_links:
+        issues.append("Missing Colab badge link")
+    else:
+        # Check the first colab link (the badge) points to this notebook
+        badge_link = colab_links[0]
+        if badge_link != expected_colab_url:
+            issues.append(
+                f"Colab badge link mismatch:\n"
+                f"        found:    {badge_link}\n"
+                f"        expected: {expected_colab_url}"
+            )
+
     return issues