diff --git a/ABLTemporalBoneSegmentation.json b/ABLTemporalBoneSegmentation.json
index 13a5ed332..aa70c52fd 100644
--- a/ABLTemporalBoneSegmentation.json
+++ b/ABLTemporalBoneSegmentation.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerElastix"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerElastix"],
   "build_subdirectory": "inner-build",
   "category": "Otolaryngology",
   "scm_revision": "master",
diff --git a/AblationPlanner.json b/AblationPlanner.json
index b248f9871..524f9740f 100644
--- a/AblationPlanner.json
+++ b/AblationPlanner.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "ModelToModelDistance"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["ModelToModelDistance"],
   "build_subdirectory": ".",
   "category": "Quantification",
   "scm_revision": "main",
diff --git a/AirwaySegmentation.json b/AirwaySegmentation.json
index 2c69da79b..85aa20521 100644
--- a/AirwaySegmentation.json
+++ b/AirwaySegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/AnglePlanesExtension.json b/AnglePlanesExtension.json
index f5cc906bb..0932b43b6 100644
--- a/AnglePlanesExtension.json
+++ b/AnglePlanesExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
diff --git a/AnomalousFiltersExtension.json b/AnomalousFiltersExtension.json
index 98abf083f..4faa2ea1f 100644
--- a/AnomalousFiltersExtension.json
+++ b/AnomalousFiltersExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Filtering",
diff --git a/ArduinoController.json b/ArduinoController.json
index 40202f885..1f3b6e21c 100644
--- a/ArduinoController.json
+++ b/ArduinoController.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/AstmPhantomTest.json b/AstmPhantomTest.json
index 168f40541..829737f0a 100644
--- a/AstmPhantomTest.json
+++ b/AstmPhantomTest.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerOpenIGTLink"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerOpenIGTLink"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/Auto3dgm.json b/Auto3dgm.json
index 4d1915a00..2a1c6da76 100644
--- a/Auto3dgm.json
+++ b/Auto3dgm.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Auto3dgm",
diff --git a/AutomatedDentalTools.json b/AutomatedDentalTools.json
index 3c60f32c3..3cd023f72 100644
--- a/AutomatedDentalTools.json
+++ b/AutomatedDentalTools.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDentalModelSeg",
-    "SlicerConda"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDentalModelSeg", "SlicerConda"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/BigImage.json b/BigImage.json
index 69486aa54..5415139f7 100644
--- a/BigImage.json
+++ b/BigImage.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "BigImage",
diff --git a/BoneReconstructionPlanner.json b/BoneReconstructionPlanner.json
index 7ea4def43..747e451a1 100644
--- a/BoneReconstructionPlanner.json
+++ b/BoneReconstructionPlanner.json
@@ -1,9 +1,6 @@
 {
-  "build_dependencies": [
-    "SurfaceWrapSolidify",
-    "MarkupsToModel",
-    "Sandbox"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SurfaceWrapSolidify", "MarkupsToModel", "Sandbox"],
   "build_subdirectory": ".",
   "category": "Planning",
   "scm_revision": "main",
diff --git a/BoneTextureExtension.json b/BoneTextureExtension.json
index ecab9d650..3f7d149c4 100644
--- a/BoneTextureExtension.json
+++ b/BoneTextureExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Quantification",
diff --git a/BoneThicknessMapping.json b/BoneThicknessMapping.json
index e44b89e73..22271133e 100644
--- a/BoneThicknessMapping.json
+++ b/BoneThicknessMapping.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
diff --git a/BrainVolumeRefinement.json b/BrainVolumeRefinement.json
index ac47f0005..6c7ff5a3e 100644
--- a/BrainVolumeRefinement.json
+++ b/BrainVolumeRefinement.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/BreastImplantAnalyzer.json b/BreastImplantAnalyzer.json
index 1d002a4f4..d92704812 100644
--- a/BreastImplantAnalyzer.json
+++ b/BreastImplantAnalyzer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/BreastUltrasoundAnalysis.json b/BreastUltrasoundAnalysis.json
index c4270ac5c..086f93ed2 100644
--- a/BreastUltrasoundAnalysis.json
+++ b/BreastUltrasoundAnalysis.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Utilities",
   "scm_revision": "master",
diff --git a/Breast_DCEMRI_FTV.json b/Breast_DCEMRI_FTV.json
index 23b904a7f..4042a3a3d 100644
--- a/Breast_DCEMRI_FTV.json
+++ b/Breast_DCEMRI_FTV.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "FTV Segmentation",
diff --git a/CMFreg.json b/CMFreg.json
index 71d54ab06..b770dc33f 100644
--- a/CMFreg.json
+++ b/CMFreg.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Registration",
diff --git a/CarreraSlice.json b/CarreraSlice.json
index 1e83a9ad2..aa309b7fa 100644
--- a/CarreraSlice.json
+++ b/CarreraSlice.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/ChangeTracker.json b/ChangeTracker.json
index 0f2ec29d9..eb396e4e6 100644
--- a/ChangeTracker.json
+++ b/ChangeTracker.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Wizards",
diff --git a/Chest_Imaging_Platform.json b/Chest_Imaging_Platform.json
index 4b3366dfe..6b33a6a3b 100644
--- a/Chest_Imaging_Platform.json
+++ b/Chest_Imaging_Platform.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Chest Imaging Platform",
diff --git a/CleverSeg.json b/CleverSeg.json
index eaaafdab7..54a582578 100644
--- a/CleverSeg.json
+++ b/CleverSeg.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/ColocZStats.json b/ColocZStats.json
index 629104e7e..d9bdbcba3 100644
--- a/ColocZStats.json
+++ b/ColocZStats.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/ConnectToSupervisely.json b/ConnectToSupervisely.json
index e2b4a2153..063f339d1 100644
--- a/ConnectToSupervisely.json
+++ b/ConnectToSupervisely.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Supervisely",
diff --git a/CurveMaker.json b/CurveMaker.json
index 83538dd48..df8fcbb46 100644
--- a/CurveMaker.json
+++ b/CurveMaker.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/DCMQI.json b/DCMQI.json
index 5533546e8..a6200a18d 100644
--- a/DCMQI.json
+++ b/DCMQI.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "dcmqi-build",
   "category": "DICOM",
diff --git a/DICOMwebBrowser.json b/DICOMwebBrowser.json
index 78e3a21d9..a0d1280f6 100644
--- a/DICOMwebBrowser.json
+++ b/DICOMwebBrowser.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/DRRGenerator.json b/DRRGenerator.json
index 24e29a7a7..9803f20f4 100644
--- a/DRRGenerator.json
+++ b/DRRGenerator.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Filtering",
diff --git a/DSCMRIAnalysis.json b/DSCMRIAnalysis.json
index eb28c52b6..eecf8b7e5 100644
--- a/DSCMRIAnalysis.json
+++ b/DSCMRIAnalysis.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/DatabaseInteractor.json b/DatabaseInteractor.json
index 142862ad6..227f5efc3 100644
--- a/DatabaseInteractor.json
+++ b/DatabaseInteractor.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Web System Tools",
diff --git a/DebuggingTools.json b/DebuggingTools.json
index f9c616507..8305c1f81 100644
--- a/DebuggingTools.json
+++ b/DebuggingTools.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/DentalSegmentator.json b/DentalSegmentator.json
index 6de192f05..0f30d377e 100644
--- a/DentalSegmentator.json
+++ b/DentalSegmentator.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "NNUNet"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["NNUNet"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/DeveloperToolsForExtensions.json b/DeveloperToolsForExtensions.json
index 2c9d2b09e..ea175fee5 100644
--- a/DeveloperToolsForExtensions.json
+++ b/DeveloperToolsForExtensions.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/DiffusionQC.json b/DiffusionQC.json
index b9db1947f..b9a117449 100644
--- a/DiffusionQC.json
+++ b/DiffusionQC.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDMRI"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDMRI"],
   "build_subdirectory": ".",
   "category": "Diffusion",
   "scm_revision": "master",
diff --git a/EasyClip.json b/EasyClip.json
index 7fcdf2518..b1bea8f41 100644
--- a/EasyClip.json
+++ b/EasyClip.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
diff --git a/ErodeDilateLabel.json b/ErodeDilateLabel.json
index 4d936abdd..314953327 100644
--- a/ErodeDilateLabel.json
+++ b/ErodeDilateLabel.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Filtering.Morphology",
diff --git a/ExtraMarkups.json b/ExtraMarkups.json
index 6dc468a70..afb79bd27 100644
--- a/ExtraMarkups.json
+++ b/ExtraMarkups.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/FiducialsToModelDistance.json b/FiducialsToModelDistance.json
index 9a19f91f8..9cd11562b 100644
--- a/FiducialsToModelDistance.json
+++ b/FiducialsToModelDistance.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/FilmDosimetryAnalysis.json b/FilmDosimetryAnalysis.json
index 6af6ef5ca..6524b4a2b 100644
--- a/FilmDosimetryAnalysis.json
+++ b/FilmDosimetryAnalysis.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRT"],
   "build_subdirectory": ".",
   "category": "Radiotherapy",
   "scm_revision": "master",
diff --git a/FlywheelCaseIterator.json b/FlywheelCaseIterator.json
index a8dc65ebe..70d853d5a 100644
--- a/FlywheelCaseIterator.json
+++ b/FlywheelCaseIterator.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDevelopmentToolbox"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDevelopmentToolbox"],
   "build_subdirectory": ".",
   "category": "Informatics",
   "scm_revision": "main",
diff --git a/GelDosimetryAnalysis.json b/GelDosimetryAnalysis.json
index c685cabf2..9609abeff 100644
--- a/GelDosimetryAnalysis.json
+++ b/GelDosimetryAnalysis.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRT"],
   "build_subdirectory": ".",
   "category": "Radiotherapy",
   "scm_revision": "master",
diff --git a/GeodesicSlicer.json b/GeodesicSlicer.json
index 146aef518..7dde83d35 100644
--- a/GeodesicSlicer.json
+++ b/GeodesicSlicer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/GyroGuide.json b/GyroGuide.json
index 4eda0f1a1..75c8c4f3d 100644
--- a/GyroGuide.json
+++ b/GyroGuide.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/HDBrainExtraction.json b/HDBrainExtraction.json
index ef9b51ea1..911259f5a 100644
--- a/HDBrainExtraction.json
+++ b/HDBrainExtraction.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/IDCBrowser.json b/IDCBrowser.json
index cf25ba6cb..f09c6eb06 100644
--- a/IDCBrowser.json
+++ b/IDCBrowser.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "QuantitativeReporting"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["QuantitativeReporting"],
   "build_subdirectory": ".",
   "category": "Informatics",
   "scm_revision": "main",
diff --git a/ImageAugmenter.json b/ImageAugmenter.json
index c9ef33006..737b0ee44 100644
--- a/ImageAugmenter.json
+++ b/ImageAugmenter.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/ImageCompare.json b/ImageCompare.json
index 5c3d9d123..903677378 100644
--- a/ImageCompare.json
+++ b/ImageCompare.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/ImageMaker.json b/ImageMaker.json
index 83a09ee02..3aa1cc185 100644
--- a/ImageMaker.json
+++ b/ImageMaker.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/IntensitySegmenter.json b/IntensitySegmenter.json
index b8e1d940a..a5804a2a6 100644
--- a/IntensitySegmenter.json
+++ b/IntensitySegmenter.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/KidneyStoneCalculator.json b/KidneyStoneCalculator.json
index 4ec4e2cf9..c79f62b6a 100644
--- a/KidneyStoneCalculator.json
+++ b/KidneyStoneCalculator.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/LanguagePacks.json b/LanguagePacks.json
index 591dabc91..3b172a1f5 100644
--- a/LanguagePacks.json
+++ b/LanguagePacks.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/LungCTAnalyzer.json b/LungCTAnalyzer.json
index ce0641607..1721201f9 100644
--- a/LungCTAnalyzer.json
+++ b/LungCTAnalyzer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "PyTorch",
     "SegmentEditorExtraEffects",
diff --git a/MEMOS.json b/MEMOS.json
index 0596453ab..7a6b4e062 100644
--- a/MEMOS.json
+++ b/MEMOS.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/MHubRunner.json b/MHubRunner.json
index bbdc0ac88..bdefbaf35 100644
--- a/MHubRunner.json
+++ b/MHubRunner.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Examples",
diff --git a/MONAIAuto3DSeg.json b/MONAIAuto3DSeg.json
index 36a1456e0..f05967274 100644
--- a/MONAIAuto3DSeg.json
+++ b/MONAIAuto3DSeg.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/MONAILabel.json b/MONAILabel.json
index 04a9a6c16..a90572890 100644
--- a/MONAILabel.json
+++ b/MONAILabel.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Active Learning",
diff --git a/MONAIViz.json b/MONAIViz.json
index 18dbf16ff..58c1163a0 100644
--- a/MONAIViz.json
+++ b/MONAIViz.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Developer Tools",
   "scm_revision": "main",
diff --git a/MRUSLandmarking.json b/MRUSLandmarking.json
index 8aeacfe0b..0afc39a74 100644
--- a/MRUSLandmarking.json
+++ b/MRUSLandmarking.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/MUST-segmenter.json b/MUST-segmenter.json
index f8902e6ac..403c582d2 100644
--- a/MUST-segmenter.json
+++ b/MUST-segmenter.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRadiomics"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRadiomics"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "master",
diff --git a/MarkupsToModel.json b/MarkupsToModel.json
index db7700df7..bf838baa4 100644
--- a/MarkupsToModel.json
+++ b/MarkupsToModel.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/MatlabBridge.json b/MatlabBridge.json
index 330d1fd2a..4714d06ac 100644
--- a/MatlabBridge.json
+++ b/MatlabBridge.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerOpenIGTLink"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerOpenIGTLink"],
   "build_subdirectory": ".",
   "category": "Developer Tools",
   "scm_revision": "master",
diff --git a/MedialSkeleton.json b/MedialSkeleton.json
index ab43c8790..eb5067fec 100644
--- a/MedialSkeleton.json
+++ b/MedialSkeleton.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Shape Analysis",
diff --git a/MeshStatisticsExtension.json b/MeshStatisticsExtension.json
index caa30f407..c1536c0b0 100644
--- a/MeshStatisticsExtension.json
+++ b/MeshStatisticsExtension.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "ModelToModelDistance"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["ModelToModelDistance"],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
   "scm_revision": "master",
diff --git a/MeshToLabelMap.json b/MeshToLabelMap.json
index 2fee23caa..5e5a68c9b 100644
--- a/MeshToLabelMap.json
+++ b/MeshToLabelMap.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
diff --git a/ModelClip.json b/ModelClip.json
index 05cb34ffa..7baa6a284 100644
--- a/ModelClip.json
+++ b/ModelClip.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Surface Models",
diff --git a/ModelCropper.json b/ModelCropper.json
index 08984e94f..33f7dc7b8 100644
--- a/ModelCropper.json
+++ b/ModelCropper.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Surface Models",
diff --git a/ModelToModelDistance.json b/ModelToModelDistance.json
index 9b1d56ee1..de457d3b8 100644
--- a/ModelToModelDistance.json
+++ b/ModelToModelDistance.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/NNUNet.json b/NNUNet.json
index c7e95f2e0..5cc301db3 100644
--- a/NNUNet.json
+++ b/NNUNet.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch",
-    "SlicerPythonTestRunner"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch", "SlicerPythonTestRunner"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/NeedleFinder.json b/NeedleFinder.json
index 3365d5c70..6590b35cf 100644
--- a/NeedleFinder.json
+++ b/NeedleFinder.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/NvidiaAIAssistedAnnotation.json b/NvidiaAIAssistedAnnotation.json
index cdeed4fcb..ecc6b3c9d 100644
--- a/NvidiaAIAssistedAnnotation.json
+++ b/NvidiaAIAssistedAnnotation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/OpenDose3D.json b/OpenDose3D.json
index 889024005..9d410c057 100644
--- a/OpenDose3D.json
+++ b/OpenDose3D.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerElastix"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerElastix"],
   "build_subdirectory": ".",
   "category": "Radiotherapy",
   "scm_revision": "master-stable",
diff --git a/OrthodonticAnalysis.json b/OrthodonticAnalysis.json
index cda9feaf2..763d3d3c6 100644
--- a/OrthodonticAnalysis.json
+++ b/OrthodonticAnalysis.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Orthodontics",
diff --git a/OsteotomyPlanner.json b/OsteotomyPlanner.json
index b33d31863..503475e0a 100644
--- a/OsteotomyPlanner.json
+++ b/OsteotomyPlanner.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Osteotomy Planning",
diff --git a/PBNRR.json b/PBNRR.json
index 73ece13a7..78bf8700c 100644
--- a/PBNRR.json
+++ b/PBNRR.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Registration",
diff --git a/PET-IndiC.json b/PET-IndiC.json
index 8e4363184..02bab7dc5 100644
--- a/PET-IndiC.json
+++ b/PET-IndiC.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/PETCPhantom.json b/PETCPhantom.json
index c3f5c9bd6..2dcfca838 100644
--- a/PETCPhantom.json
+++ b/PETCPhantom.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/PETDICOMExtension.json b/PETDICOMExtension.json
index 3d6240fa7..b51224f70 100644
--- a/PETDICOMExtension.json
+++ b/PETDICOMExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Converters",
diff --git a/PETLiverUptakeMeasurement.json b/PETLiverUptakeMeasurement.json
index b4ed149e1..504d0d75e 100644
--- a/PETLiverUptakeMeasurement.json
+++ b/PETLiverUptakeMeasurement.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "DCMQI"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["DCMQI"],
   "build_subdirectory": ".",
   "category": "Quantification",
   "scm_revision": "master",
diff --git a/PETTumorSegmentation.json b/PETTumorSegmentation.json
index 268d4337d..eb878e311 100644
--- a/PETTumorSegmentation.json
+++ b/PETTumorSegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/ParallelProcessing.json b/ParallelProcessing.json
index 7a50b82af..a87d0aaf3 100644
--- a/ParallelProcessing.json
+++ b/ParallelProcessing.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/PathReconstruction.json b/PathReconstruction.json
index 75baf5ccd..47671fd69 100644
--- a/PathReconstruction.json
+++ b/PathReconstruction.json
@@ -1,9 +1,6 @@
 {
-  "build_dependencies": [
-    "MarkupsToModel",
-    "SlicerIGT",
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["MarkupsToModel", "SlicerIGT", "SlicerRT"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/PedicleScrewSimulator.json b/PedicleScrewSimulator.json
index ed4206d98..e3c5d56eb 100644
--- a/PedicleScrewSimulator.json
+++ b/PedicleScrewSimulator.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Training",
diff --git a/PercutaneousApproachAnalysis.json b/PercutaneousApproachAnalysis.json
index 415e380d2..45fef940b 100644
--- a/PercutaneousApproachAnalysis.json
+++ b/PercutaneousApproachAnalysis.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/PerkTutor.json b/PerkTutor.json
index 31a626ce9..136e8e7c7 100644
--- a/PerkTutor.json
+++ b/PerkTutor.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Training",
diff --git a/PetSpectAnalysis.json b/PetSpectAnalysis.json
index bb5ccda8b..481e9a783 100644
--- a/PetSpectAnalysis.json
+++ b/PetSpectAnalysis.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Nuclear Medicine",
diff --git a/PickAndPaintExtension.json b/PickAndPaintExtension.json
index a9cdbba8c..a8ccf2b89 100644
--- a/PickAndPaintExtension.json
+++ b/PickAndPaintExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
diff --git a/Pipelines.json b/Pipelines.json
index bd982b0ac..a01517c90 100644
--- a/Pipelines.json
+++ b/Pipelines.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Pipelines",
diff --git a/PkModeling.json b/PkModeling.json
index 82666a4f5..763f25335 100644
--- a/PkModeling.json
+++ b/PkModeling.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "pkmodeling-build",
   "category": "Quantification",
diff --git a/PortPlacement.json b/PortPlacement.json
index d8a226657..9fd984b21 100644
--- a/PortPlacement.json
+++ b/PortPlacement.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "IGT",
diff --git a/PyTorch.json b/PyTorch.json
index 864f82309..bf6290501 100644
--- a/PyTorch.json
+++ b/PyTorch.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/Q3DC.json b/Q3DC.json
index 13ac96aff..2d97ef308 100644
--- a/Q3DC.json
+++ b/Q3DC.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerMarkupConstraints"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerMarkupConstraints"],
   "build_subdirectory": ".",
   "category": "Shape Analysis",
   "scm_revision": "master",
diff --git a/QuantitativeReporting.json b/QuantitativeReporting.json
index 399735ce9..4a943e049 100644
--- a/QuantitativeReporting.json
+++ b/QuantitativeReporting.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "SlicerDevelopmentToolbox",
     "DCMQI",
diff --git a/RVXLiverSegmentation.json b/RVXLiverSegmentation.json
index eb4f12c4c..bbf303a9e 100644
--- a/RVXLiverSegmentation.json
+++ b/RVXLiverSegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "SlicerVMTK",
     "MarkupsToModel",
diff --git a/RVXVesselnessFilters.json b/RVXVesselnessFilters.json
index 4544c2489..db20ac1d9 100644
--- a/RVXVesselnessFilters.json
+++ b/RVXVesselnessFilters.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Filtering.Vesselness",
diff --git a/RawImageGuess.json b/RawImageGuess.json
index 9423eaafd..58b4bdfa6 100644
--- a/RawImageGuess.json
+++ b/RawImageGuess.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/RegistrationQA.json b/RegistrationQA.json
index 92477b6dd..e1c123d65 100644
--- a/RegistrationQA.json
+++ b/RegistrationQA.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRT"],
   "build_subdirectory": ".",
   "category": "Registration",
   "scm_revision": "master",
diff --git a/ResectionPlanner.json b/ResectionPlanner.json
index 79b5e7a50..cd6569fee 100644
--- a/ResectionPlanner.json
+++ b/ResectionPlanner.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRT"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/SNRMeasurement.json b/SNRMeasurement.json
index d78085c5b..396884c39 100644
--- a/SNRMeasurement.json
+++ b/SNRMeasurement.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/SPHARM-PDM.json b/SPHARM-PDM.json
index 49cc297af..8f5b20183 100644
--- a/SPHARM-PDM.json
+++ b/SPHARM-PDM.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "MeshToLabelMap"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["MeshToLabelMap"],
   "build_subdirectory": "SPHARM-PDM-build",
   "category": "SPHARM",
   "scm_revision": "master",
diff --git a/Sandbox.json b/Sandbox.json
index 93af35b5a..72e409926 100644
--- a/Sandbox.json
+++ b/Sandbox.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Examples",
diff --git a/ScatteredTransform.json b/ScatteredTransform.json
index 8346358f5..e733f3b32 100644
--- a/ScatteredTransform.json
+++ b/ScatteredTransform.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Registration",
diff --git a/Scoliosis.json b/Scoliosis.json
index 0caec382d..9ad00b204 100644
--- a/Scoliosis.json
+++ b/Scoliosis.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/SegmentEditorExtraEffects.json b/SegmentEditorExtraEffects.json
index dcdb57fb2..5c59b418e 100644
--- a/SegmentEditorExtraEffects.json
+++ b/SegmentEditorExtraEffects.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "MarkupsToModel"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["MarkupsToModel"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "master",
diff --git a/SegmentMesher.json b/SegmentMesher.json
index 4ef077574..87cffccdc 100644
--- a/SegmentMesher.json
+++ b/SegmentMesher.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Segmentation",
diff --git a/SegmentRegistration.json b/SegmentRegistration.json
index 86d02581f..18843acb8 100644
--- a/SegmentRegistration.json
+++ b/SegmentRegistration.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerProstate",
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerProstate", "SlicerRT"],
   "build_subdirectory": ".",
   "category": "Registration",
   "scm_revision": "master",
diff --git a/SegmentWithSAM.json b/SegmentWithSAM.json
index 074043cf3..78d3062de 100644
--- a/SegmentWithSAM.json
+++ b/SegmentWithSAM.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/SegmentationAidedRegistration.json b/SegmentationAidedRegistration.json
index 6c04e3c67..6e530c65a 100644
--- a/SegmentationAidedRegistration.json
+++ b/SegmentationAidedRegistration.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Registration",
diff --git a/SegmentationReview.json b/SegmentationReview.json
index 619d52ce3..eadef538a 100644
--- a/SegmentationReview.json
+++ b/SegmentationReview.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SequenceRegistration.json b/SequenceRegistration.json
index 6c3200c4b..31aac6f52 100644
--- a/SequenceRegistration.json
+++ b/SequenceRegistration.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerElastix"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerElastix"],
   "build_subdirectory": ".",
   "category": "Sequences",
   "scm_revision": "master",
diff --git a/ShapePopulationViewer.json b/ShapePopulationViewer.json
index 4fb99559c..857089e5c 100644
--- a/ShapePopulationViewer.json
+++ b/ShapePopulationViewer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Shape Visualization",
diff --git a/ShapeRegressionExtension.json b/ShapeRegressionExtension.json
index 2bf0db797..ab09233b7 100644
--- a/ShapeRegressionExtension.json
+++ b/ShapeRegressionExtension.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "ShapeRegressionExtension-build",
   "category": "Shape Regression",
diff --git a/ShapeVariationAnalyzer.json b/ShapeVariationAnalyzer.json
index 05bee6f9d..86a3a9993 100644
--- a/ShapeVariationAnalyzer.json
+++ b/ShapeVariationAnalyzer.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "ShapePopulationViewer"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["ShapePopulationViewer"],
   "build_subdirectory": "inner-build",
   "category": "Quantification",
   "scm_revision": "master",
diff --git a/SkeletalRepresentation.json b/SkeletalRepresentation.json
index c2dc004c3..0dfc5438a 100644
--- a/SkeletalRepresentation.json
+++ b/SkeletalRepresentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Shape Analysis",
diff --git a/SkinMouldGenerator.json b/SkinMouldGenerator.json
index 43e162aaa..84403ef0d 100644
--- a/SkinMouldGenerator.json
+++ b/SkinMouldGenerator.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Radiotherapy",
diff --git a/SkullStripper.json b/SkullStripper.json
index 070dda905..59940265f 100644
--- a/SkullStripper.json
+++ b/SkullStripper.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerAIGT.json b/SlicerAIGT.json
index 5372a1f0b..46143c096 100644
--- a/SlicerAIGT.json
+++ b/SlicerAIGT.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerOpenIGTLink",
-    "SlicerIGT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerOpenIGTLink", "SlicerIGT"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/SlicerANTs.json b/SlicerANTs.json
index a697116cb..49643923d 100644
--- a/SlicerANTs.json
+++ b/SlicerANTs.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Registration",
diff --git a/SlicerAutoscoperM.json b/SlicerAutoscoperM.json
index 179e0a6fe..70132c531 100644
--- a/SlicerAutoscoperM.json
+++ b/SlicerAutoscoperM.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "Sandbox",
-    "SegmentEditorExtraEffects"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["Sandbox", "SegmentEditorExtraEffects"],
   "build_subdirectory": "inner-build",
   "category": "Tracking",
   "scm_revision": "main",
diff --git a/SlicerAutoscroll.json b/SlicerAutoscroll.json
index 729803d07..e5acfcd56 100644
--- a/SlicerAutoscroll.json
+++ b/SlicerAutoscroll.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerBatchAnonymize.json b/SlicerBatchAnonymize.json
index c8f93d2fb..262fb889a 100644
--- a/SlicerBatchAnonymize.json
+++ b/SlicerBatchAnonymize.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "DSCI",
diff --git a/SlicerBiomech.json b/SlicerBiomech.json
index e3a7407f6..b263d344d 100644
--- a/SlicerBiomech.json
+++ b/SlicerBiomech.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerMorph"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerMorph"],
   "build_subdirectory": ".",
   "category": "Quantification",
   "scm_revision": "main",
diff --git a/SlicerCBCTToothSegmentation.json b/SlicerCBCTToothSegmentation.json
index 03dfb7632..3b85e76f4 100644
--- a/SlicerCBCTToothSegmentation.json
+++ b/SlicerCBCTToothSegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerCMF.json b/SlicerCMF.json
index 689e77027..bb3143472 100644
--- a/SlicerCMF.json
+++ b/SlicerCMF.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "AnglePlanesExtension",
     "BoneTextureExtension",
diff --git a/SlicerCaseIterator.json b/SlicerCaseIterator.json
index 93cc206fd..f191e0893 100644
--- a/SlicerCaseIterator.json
+++ b/SlicerCaseIterator.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDevelopmentToolbox"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDevelopmentToolbox"],
   "build_subdirectory": ".",
   "category": "Utilities",
   "scm_revision": "master",
diff --git a/SlicerCervicalSpine.json b/SlicerCervicalSpine.json
index cf64f37bc..b1a041f86 100644
--- a/SlicerCervicalSpine.json
+++ b/SlicerCervicalSpine.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerCochlea"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerCochlea"],
   "build_subdirectory": ".",
   "category": "VisSimTools",
   "scm_revision": "master",
diff --git a/SlicerCochlea.json b/SlicerCochlea.json
index fa12cd317..62c843633 100644
--- a/SlicerCochlea.json
+++ b/SlicerCochlea.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerElastix"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerElastix"],
   "build_subdirectory": ".",
   "category": "VisSimTools",
   "scm_revision": "master",
diff --git a/SlicerConda.json b/SlicerConda.json
index ddf3eabe9..06f389247 100644
--- a/SlicerConda.json
+++ b/SlicerConda.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Conda",
diff --git a/SlicerDMRI.json b/SlicerDMRI.json
index a1e674922..a6fd42aec 100644
--- a/SlicerDMRI.json
+++ b/SlicerDMRI.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "UKFTractography"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["UKFTractography"],
   "build_subdirectory": "inner-build",
   "category": "Diffusion",
   "scm_revision": "master",
diff --git a/SlicerDcm2nii.json b/SlicerDcm2nii.json
index f61496be8..1d9cae387 100644
--- a/SlicerDcm2nii.json
+++ b/SlicerDcm2nii.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Diffusion",
diff --git a/SlicerDensityLungSegmentation.json b/SlicerDensityLungSegmentation.json
index cffc14f1b..cbdaf21c7 100644
--- a/SlicerDensityLungSegmentation.json
+++ b/SlicerDensityLungSegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerDentalModelSeg.json b/SlicerDentalModelSeg.json
index 99e1bdc0b..4f7ad403b 100644
--- a/SlicerDentalModelSeg.json
+++ b/SlicerDentalModelSeg.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerDevelopmentToolbox.json b/SlicerDevelopmentToolbox.json
index 2434b6d8d..507b0e8c3 100644
--- a/SlicerDevelopmentToolbox.json
+++ b/SlicerDevelopmentToolbox.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/SlicerElastix.json b/SlicerElastix.json
index 2b1d79bf8..99b7ee1cf 100644
--- a/SlicerElastix.json
+++ b/SlicerElastix.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Registration",
diff --git a/SlicerFab.json b/SlicerFab.json
index 4c3cb43f1..81ebf5fa1 100644
--- a/SlicerFab.json
+++ b/SlicerFab.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Printing",
diff --git a/SlicerFreeSurfer.json b/SlicerFreeSurfer.json
index c87660adf..dce877efe 100644
--- a/SlicerFreeSurfer.json
+++ b/SlicerFreeSurfer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Neuroimaging",
diff --git a/SlicerHeart.json b/SlicerHeart.json
index b880ae328..324913076 100644
--- a/SlicerHeart.json
+++ b/SlicerHeart.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerIGT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerIGT"],
   "build_subdirectory": "inner-build",
   "category": "Cardiac",
   "scm_revision": "master",
diff --git a/SlicerIGSIO.json b/SlicerIGSIO.json
index e74e056b1..24eaed500 100644
--- a/SlicerIGSIO.json
+++ b/SlicerIGSIO.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "IGT",
diff --git a/SlicerIGT.json b/SlicerIGT.json
index 622d33092..c5d5af478 100644
--- a/SlicerIGT.json
+++ b/SlicerIGT.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerIGSIO"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerIGSIO"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/SlicerITKUltrasound.json b/SlicerITKUltrasound.json
index 28ba10e12..65c0f1459 100644
--- a/SlicerITKUltrasound.json
+++ b/SlicerITKUltrasound.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "SlicerITKUltrasound-build",
   "category": "Filtering",
diff --git a/SlicerJupyter.json b/SlicerJupyter.json
index 92179290a..78f8bd4f2 100644
--- a/SlicerJupyter.json
+++ b/SlicerJupyter.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Developer Tools",
diff --git a/SlicerLayoutButtons.json b/SlicerLayoutButtons.json
index 767c5e92d..1ee524509 100644
--- a/SlicerLayoutButtons.json
+++ b/SlicerLayoutButtons.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDevelopmentToolbox"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDevelopmentToolbox"],
   "build_subdirectory": ".",
   "category": "Informatics",
   "scm_revision": "master",
diff --git a/SlicerLiver.json b/SlicerLiver.json
index c490eed1b..5f6c5dc7b 100644
--- a/SlicerLiver.json
+++ b/SlicerLiver.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "SlicerVMTK",
     "SegmentEditorExtraEffects",
diff --git a/SlicerLookingGlass.json b/SlicerLookingGlass.json
index 410c6beea..def4e4f9b 100644
--- a/SlicerLookingGlass.json
+++ b/SlicerLookingGlass.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Holographic Display",
diff --git a/SlicerMarkupConstraints.json b/SlicerMarkupConstraints.json
index 5227122d2..d0b328aff 100644
--- a/SlicerMarkupConstraints.json
+++ b/SlicerMarkupConstraints.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/SlicerMorph.json b/SlicerMorph.json
index 4d7d811b0..d6dbb00a3 100644
--- a/SlicerMorph.json
+++ b/SlicerMorph.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SegmentEditorExtraEffects"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SegmentEditorExtraEffects"],
   "build_subdirectory": ".",
   "category": "SlicerMorph",
   "scm_revision": "master",
diff --git a/SlicerNetstim.json b/SlicerNetstim.json
index df48c1d73..260345792 100644
--- a/SlicerNetstim.json
+++ b/SlicerNetstim.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerRT",
-    "MarkupsToModel"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerRT", "MarkupsToModel"],
   "build_subdirectory": ".",
   "category": "Netstim",
   "scm_revision": "master",
diff --git a/SlicerNeuro.json b/SlicerNeuro.json
index 312e28a0f..db191701b 100644
--- a/SlicerNeuro.json
+++ b/SlicerNeuro.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "UKFTractography",
     "SwissSkullStripper",
diff --git a/SlicerNeuroSegmentation.json b/SlicerNeuroSegmentation.json
index 436d5b2e3..5522e7404 100644
--- a/SlicerNeuroSegmentation.json
+++ b/SlicerNeuroSegmentation.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerFreeSurfer"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerFreeSurfer"],
   "build_subdirectory": ".",
   "category": "Neuroimaging",
   "scm_revision": "main",
diff --git a/SlicerOpenAnatomy.json b/SlicerOpenAnatomy.json
index f64110650..ecaa461f1 100644
--- a/SlicerOpenAnatomy.json
+++ b/SlicerOpenAnatomy.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerOpenCV.json b/SlicerOpenCV.json
index dc7e8648a..ca70adb31 100644
--- a/SlicerOpenCV.json
+++ b/SlicerOpenCV.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Libraries",
diff --git a/SlicerOpenIGTLink.json b/SlicerOpenIGTLink.json
index 64453aa27..c37b57d94 100644
--- a/SlicerOpenIGTLink.json
+++ b/SlicerOpenIGTLink.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "IGT",
diff --git a/SlicerProstate.json b/SlicerProstate.json
index 0f774f232..715b16574 100644
--- a/SlicerProstate.json
+++ b/SlicerProstate.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/SlicerProstateAblation.json b/SlicerProstateAblation.json
index 879af387a..3f0e13724 100644
--- a/SlicerProstateAblation.json
+++ b/SlicerProstateAblation.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDevelopmentToolbox",
-    "ZFrameRegistration"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDevelopmentToolbox", "ZFrameRegistration"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/SlicerPythonTestRunner.json b/SlicerPythonTestRunner.json
index 8d9d95345..43a404380 100644
--- a/SlicerPythonTestRunner.json
+++ b/SlicerPythonTestRunner.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/SlicerRT.json b/SlicerRT.json
index 84b1e5b2a..c5d800619 100644
--- a/SlicerRT.json
+++ b/SlicerRT.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Radiotherapy",
diff --git a/SlicerRadiomics.json b/SlicerRadiomics.json
index 1ec1b98d3..86ec6b4c4 100644
--- a/SlicerRadiomics.json
+++ b/SlicerRadiomics.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Informatics",
diff --git a/SlicerRegularizedFastMarching.json b/SlicerRegularizedFastMarching.json
index 138470d66..573fdbdc5 100644
--- a/SlicerRegularizedFastMarching.json
+++ b/SlicerRegularizedFastMarching.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerThemes.json b/SlicerThemes.json
index 08e12a1d1..9f490458e 100644
--- a/SlicerThemes.json
+++ b/SlicerThemes.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Developer Tools",
diff --git a/SlicerTissueSegmentation.json b/SlicerTissueSegmentation.json
index c891878bd..bfffd07a5 100644
--- a/SlicerTissueSegmentation.json
+++ b/SlicerTissueSegmentation.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SlicerToKiwiExporter.json b/SlicerToKiwiExporter.json
index c8bb23b44..18ff6f179 100644
--- a/SlicerToKiwiExporter.json
+++ b/SlicerToKiwiExporter.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Exporter",
diff --git a/SlicerVMTK.json b/SlicerVMTK.json
index 8b4cdf826..5f6de6d6a 100644
--- a/SlicerVMTK.json
+++ b/SlicerVMTK.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "ExtraMarkups"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["ExtraMarkups"],
   "build_subdirectory": "inner-build",
   "category": "Vascular Modeling Toolkit",
   "scm_revision": "master",
diff --git a/SlicerVirtualMouseCursor.json b/SlicerVirtualMouseCursor.json
index 53b8f2abb..a3b1186c7 100644
--- a/SlicerVirtualMouseCursor.json
+++ b/SlicerVirtualMouseCursor.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Utilities",
diff --git a/SlicerVirtualReality.json b/SlicerVirtualReality.json
index 771de2ff6..45a591279 100644
--- a/SlicerVirtualReality.json
+++ b/SlicerVirtualReality.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Virtual Reality",
diff --git a/SlicerWMA.json b/SlicerWMA.json
index a5dcfb808..c89414b2b 100644
--- a/SlicerWMA.json
+++ b/SlicerWMA.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": "inner-build",
   "category": "Libraries",
diff --git a/SoundControl.json b/SoundControl.json
index 475af4e76..aa6e86bf4 100644
--- a/SoundControl.json
+++ b/SoundControl.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/Stereotaxia.json b/Stereotaxia.json
index 3e089aea6..07c20f47a 100644
--- a/Stereotaxia.json
+++ b/Stereotaxia.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/SurfaceFragmentsRegistration.json b/SurfaceFragmentsRegistration.json
index 28ee9f5fd..5ef04b686 100644
--- a/SurfaceFragmentsRegistration.json
+++ b/SurfaceFragmentsRegistration.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Registration",
diff --git a/SurfaceLearner.json b/SurfaceLearner.json
index d76aa1c0e..8825f8799 100644
--- a/SurfaceLearner.json
+++ b/SurfaceLearner.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "SurfaceLearner",
diff --git a/SurfaceMarkup.json b/SurfaceMarkup.json
index 438882209..f37ac67da 100644
--- a/SurfaceMarkup.json
+++ b/SurfaceMarkup.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/SurfaceWrapSolidify.json b/SurfaceWrapSolidify.json
index a756abc3f..85deb688a 100644
--- a/SurfaceWrapSolidify.json
+++ b/SurfaceWrapSolidify.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/SwissSkullStripper.json b/SwissSkullStripper.json
index 4f55d62de..614ab75d5 100644
--- a/SwissSkullStripper.json
+++ b/SwissSkullStripper.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/T1Mapping.json b/T1Mapping.json
index 4788a1291..ae0d71eca 100644
--- a/T1Mapping.json
+++ b/T1Mapping.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/T1_ECVMapping.json b/T1_ECVMapping.json
index f84629346..f50d014c7 100644
--- a/T1_ECVMapping.json
+++ b/T1_ECVMapping.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Cardiac",
diff --git a/T2mapping.json b/T2mapping.json
index b0db33294..3adc45a30 100644
--- a/T2mapping.json
+++ b/T2mapping.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Quantification",
diff --git a/TCIABrowser.json b/TCIABrowser.json
index 38597a043..ce37ccb5f 100644
--- a/TCIABrowser.json
+++ b/TCIABrowser.json
@@ -1,8 +1,6 @@
 {
-  "build_dependencies": [
-    "QuantitativeReporting",
-    "SlicerRT"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["QuantitativeReporting", "SlicerRT"],
   "build_subdirectory": ".",
   "category": "Informatics",
   "scm_revision": "master",
diff --git a/TITAN.json b/TITAN.json
index ce2197dfe..3efa64374 100644
--- a/TITAN.json
+++ b/TITAN.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Analysis",
diff --git a/TOMAAT.json b/TOMAAT.json
index ee4fa85c4..476832d5a 100644
--- a/TOMAAT.json
+++ b/TOMAAT.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/TomoSAM.json b/TomoSAM.json
index ccea4bf28..d52f58277 100644
--- a/TomoSAM.json
+++ b/TomoSAM.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/TorchIO.json b/TorchIO.json
index e3691eee6..35b4f940a 100644
--- a/TorchIO.json
+++ b/TorchIO.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Utilities",
   "scm_revision": "main",
diff --git a/TotalSegmentator.json b/TotalSegmentator.json
index 42d5259d0..83290b138 100644
--- a/TotalSegmentator.json
+++ b/TotalSegmentator.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "PyTorch"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["PyTorch"],
   "build_subdirectory": ".",
   "category": "Segmentation",
   "scm_revision": "main",
diff --git a/TrackingErrorInspector.json b/TrackingErrorInspector.json
index b8a79397d..45aaf221f 100644
--- a/TrackingErrorInspector.json
+++ b/TrackingErrorInspector.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/UHFMRTools.json b/UHFMRTools.json
index 61b46d2f2..735e0d9fb 100644
--- a/UHFMRTools.json
+++ b/UHFMRTools.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Filtering",
diff --git a/UKFTractography.json b/UKFTractography.json
index 259355d0c..230b8e3ee 100644
--- a/UKFTractography.json
+++ b/UKFTractography.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Tractography",
diff --git a/Ultrasound.json b/Ultrasound.json
index e016f734b..bccbe61a8 100644
--- a/Ultrasound.json
+++ b/Ultrasound.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Ultrasound",
diff --git a/VASSTAlgorithms.json b/VASSTAlgorithms.json
index c89693830..c0386e8ca 100644
--- a/VASSTAlgorithms.json
+++ b/VASSTAlgorithms.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Registration",
diff --git a/VolumeClip.json b/VolumeClip.json
index bef687cdc..da0030225 100644
--- a/VolumeClip.json
+++ b/VolumeClip.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Segmentation",
diff --git a/XNATSlicer.json b/XNATSlicer.json
index 8534a0e8f..d60f88ffb 100644
--- a/XNATSlicer.json
+++ b/XNATSlicer.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Remote",
diff --git a/ZFrameRegistration.json b/ZFrameRegistration.json
index 4f59b66fc..75f76ec69 100644
--- a/ZFrameRegistration.json
+++ b/ZFrameRegistration.json
@@ -1,7 +1,6 @@
 {
-  "build_dependencies": [
-    "SlicerDevelopmentToolbox"
-  ],
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
+  "build_dependencies": ["SlicerDevelopmentToolbox"],
   "build_subdirectory": ".",
   "category": "IGT",
   "scm_revision": "master",
diff --git a/flywheel_connect.json b/flywheel_connect.json
index ecbb8dd97..145c6f104 100644
--- a/flywheel_connect.json
+++ b/flywheel_connect.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Informatics",
diff --git a/iGyne.json b/iGyne.json
index bae48f522..6801b4b78 100644
--- a/iGyne.json
+++ b/iGyne.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "IGT",
diff --git a/mpReview.json b/mpReview.json
index 7ce3c52a3..23920e60f 100644
--- a/mpReview.json
+++ b/mpReview.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [
     "SlicerDevelopmentToolbox",
     "QuantitativeReporting",
diff --git a/slicerPRISMRendering.json b/slicerPRISMRendering.json
index 98bcffce2..bdde5aa0d 100644
--- a/slicerPRISMRendering.json
+++ b/slicerPRISMRendering.json
@@ -1,4 +1,5 @@
 {
+  "$schema": "https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-item-schema-v1.0.0.json#",
   "build_dependencies": [],
   "build_subdirectory": ".",
   "category": "Rendering",