Restore Windows Server 2012 to supported OS matrix

.github/skills/update-supported-os/SKILL.md

@@ -137,7 +137,7 @@ For each confirmed change, edit `release-notes/<version>/supported-os.json`:
 - **EOL versions (GA)**: Remove from `supported-versions`, add to `unsupported-versions`
 - **EOL versions (pre-GA)**: Remove from `supported-versions` only — do not add to `unsupported-versions`
 - **Add new versions**: Insert into `supported-versions` (keep sorted, newest first)
-- **Update `last-updated`**: Set to today's date (format: `YYYY-MM-DD`)
+- **Always update `last-updated`**: Set to today's date (format: `YYYY-MM-DD`) in every JSON file that is modified — this is required for every change, no matter how small
 - Use the `edit` tool for surgical JSON changes
 - Versions are strings, not numbers — `"3.22"` not `3.22`
 

release-notes/10.0/supported-os.json

@@ -1,6 +1,6 @@
 {
   "channel-version": "10.0",
-  "last-updated": "2026-03-12",
+  "last-updated": "2026-03-30",
   "families": [
     {
       "name": "Android",
@@ -186,11 +186,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         },
         {
@@ -204,11 +204,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         }
       ]

release-notes/10.0/supported-os.md

@@ -1,8 +1,8 @@
 # .NET 10.0 - Supported OS versions
 
-Last Updated: 2026/03/12; Support phase: Unknown
+Last Updated: 2026/03/30; Support phase: Active
 
-[.NET 10.0](README.md) is an [Unknown](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
+[.NET 10.0](README.md) is an [LTS](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
 
 ## Android
 
@@ -50,19 +50,19 @@ Notes:
 
 ## Windows
 
-| OS                        | Versions                              | Architectures | Lifecycle       |
-| ------------------------- | ------------------------------------- | ------------- | --------------- |
-| [Nano Server][23]         | 2025, 2022, 2019                      | x64           | [Lifecycle][24] |
+| OS                        | Versions                                    | Architectures | Lifecycle       |
+| ------------------------- | ------------------------------------------- | ------------- | --------------- |
+| [Nano Server][23]         | 2025, 2022, 2019                            | x64           | [Lifecycle][24] |
 | [Windows][25]             | 11 26H1, 11 25H2, 11 24H2 (IoT), 11 24H2 (E), 11 24H2, 11 23H2 (E), 10 21H2 (E), 10 21H2 (IoT), 10 1809 (E), 10 1607 (E) | Arm64, x64 | [Lifecycle][26] |
-| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2 | x64           | [Lifecycle][28] |
-| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2       | x64           | [Lifecycle][30] |
+| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2, 2012 | x64           | [Lifecycle][28] |
+| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2, 2012       | x64           | [Lifecycle][30] |
 
 Notes:
 
 - Windows: The x64 and x86 emulators are supported on Windows 11 Arm64.
 - Windows: The x86 emulator is supported on x64.
-- Windows Server: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
-- Windows Server Core: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server Core: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
 
 [0]: https://www.android.com/
 [1]: https://support.google.com/android
@@ -113,10 +113,8 @@ Notes:
 
 OS versions that are out of support by the OS publisher are not tested or supported by .NET.
 
-| OS                    | Version     | End of Life                                                                                    |
-| --------------------- | ----------- | ---------------------------------------------------------------------------------------------- |
-| Android               | 13          | 2026-03-02                                                                                     |
-| SUSE Linux Enterprise | 15.6        | 2025-12-31                                                                                     |
-| Windows               | 11 23H2 (W) | [2025-11-11](https://learn.microsoft.com/windows/release-health/windows11-release-information) |
-| Windows Server        | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)               |
-| Windows Server Core   | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)               |
+| OS      | Version     | End of Life       |
+| ------- | ----------- | ----------------- |
+| Android | 13          | 2026-03-02        |
+| SUSE Linux Enterprise | 15.6 | 2025-12-31 |
+| Windows | 11 23H2 (W) | [2025-11-11](https://learn.microsoft.com/windows/release-health/windows11-release-information) |

release-notes/11.0/supported-os.md

@@ -1,8 +1,8 @@
 # .NET 11.0 - Supported OS versions
 
-Last Updated: 2026/03/23; Support phase: Unknown
+Last Updated: 2026/03/23; Support phase: Preview
 
-[.NET 11.0](README.md) is an [Unknown](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
+[.NET 11.0](README.md) is an [STS](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
 
 ## Android
 

release-notes/8.0/supported-os.json

@@ -1,6 +1,6 @@
 {
   "channel-version": "8.0",
-  "last-updated": "2026-03-12",
+  "last-updated": "2026-03-30",
   "families": [
     {
       "name": "Android",
@@ -202,11 +202,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         },
         {
@@ -220,11 +220,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         }
       ]

release-notes/8.0/supported-os.md

@@ -1,8 +1,8 @@
 # .NET 8.0 - Supported OS versions
 
-Last Updated: 2026/03/12; Support phase: Unknown
+Last Updated: 2026/03/30; Support phase: Active
 
-[.NET 8.0](README.md) is an [Unknown](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
+[.NET 8.0](README.md) is an [LTS](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
 
 ## Android
 
@@ -50,19 +50,19 @@ Notes:
 
 ## Windows
 
-| OS                        | Versions                              | Architectures | Lifecycle       |
-| ------------------------- | ------------------------------------- | ------------- | --------------- |
-| [Nano Server][23]         | 2025, 2022, 2019                      | x64           | [Lifecycle][24] |
+| OS                        | Versions                                    | Architectures | Lifecycle       |
+| ------------------------- | ------------------------------------------- | ------------- | --------------- |
+| [Nano Server][23]         | 2025, 2022, 2019                            | x64           | [Lifecycle][24] |
 | [Windows][25]             | 11 26H1, 11 25H2, 11 24H2 (IoT), 11 24H2 (E), 11 24H2, 11 23H2 (E), 10 21H2 (E), 10 21H2 (IoT), 10 1809 (E), 10 1607 (E) | Arm64, x64 | [Lifecycle][26] |
-| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2 | x64           | [Lifecycle][28] |
-| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2       | x64           | [Lifecycle][30] |
+| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2, 2012 | x64           | [Lifecycle][28] |
+| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2, 2012       | x64           | [Lifecycle][30] |
 
 Notes:
 
 - Windows: The x64 and x86 emulators are supported on Windows 11 Arm64.
 - Windows: The x86 emulator is supported on x64.
-- Windows Server: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
-- Windows Server Core: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server Core: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
 
 [0]: https://www.android.com/
 [1]: https://support.google.com/android
@@ -143,8 +143,6 @@ OS versions that are out of support by the OS publisher are not tested or suppor
 | Windows               | 11 22H2 (W) | [2024-10-08](https://learn.microsoft.com/windows/release-health/windows11-release-information)   |
 | Windows               | 11 21H2 (E) | [2024-10-08](https://learn.microsoft.com/windows/release-health/windows11-release-information)   |
 | Windows               | 10 21H2 (E) | [2024-06-11](https://learn.microsoft.com/lifecycle/products/windows-10-enterprise-and-education) |
-| Windows Server        | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)                 |
-| Windows Server Core   | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)                 |
 | iOS                   | 16          | [2025-03-31](https://developer.apple.com/documentation/ios-ipados-release-notes/ios-16-release-notes)    |
 | iOS                   | 15          | 2025-03-31    |
 | iOS                   | 17          | 2024-11-19    |

release-notes/9.0/supported-os.json

@@ -1,6 +1,6 @@
 {
   "channel-version": "9.0",
-  "last-updated": "2026-03-12",
+  "last-updated": "2026-03-30",
   "families": [
     {
       "name": "Android",
@@ -194,11 +194,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         },
         {
@@ -212,11 +212,11 @@
             "2022",
             "2019",
             "2016",
-            "2012-R2"
+            "2012-R2",
+            "2012"
           ],
-          "unsupported-versions": ["2012"],
           "notes": [
-            "Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
+            "Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview)."
           ]
         }
       ]

release-notes/9.0/supported-os.md

@@ -1,8 +1,8 @@
 # .NET 9.0 - Supported OS versions
 
-Last Updated: 2026/03/12; Support phase: Unknown
+Last Updated: 2026/03/30; Support phase: Active
 
-[.NET 9.0](README.md) is an [Unknown](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
+[.NET 9.0](README.md) is an [STS](../../release-policies.md) release and [is supported](../../support.md) on multiple operating systems per their lifecycle policy.
 
 ## Android
 
@@ -50,19 +50,19 @@ Notes:
 
 ## Windows
 
-| OS                        | Versions                              | Architectures | Lifecycle       |
-| ------------------------- | ------------------------------------- | ------------- | --------------- |
-| [Nano Server][23]         | 2025, 2022, 2019                      | x64           | [Lifecycle][24] |
+| OS                        | Versions                                    | Architectures | Lifecycle       |
+| ------------------------- | ------------------------------------------- | ------------- | --------------- |
+| [Nano Server][23]         | 2025, 2022, 2019                            | x64           | [Lifecycle][24] |
 | [Windows][25]             | 11 26H1, 11 25H2, 11 24H2 (IoT), 11 24H2 (E), 11 24H2, 11 23H2 (E), 10 21H2 (E), 10 21H2 (IoT), 10 1809 (E), 10 1607 (E) | Arm64, x64 | [Lifecycle][26] |
-| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2 | x64           | [Lifecycle][28] |
-| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2       | x64, x86      | [Lifecycle][30] |
+| [Windows Server][27]      | 2025, 23H2, 2022, 2019, 2016, 2012-R2, 2012 | x64           | [Lifecycle][28] |
+| [Windows Server Core][29] | 2025, 2022, 2019, 2016, 2012-R2, 2012       | x64, x86      | [Lifecycle][30] |
 
 Notes:
 
 - Windows: The x64 and x86 emulators are supported on Windows 11 Arm64.
 - Windows: The x86 emulator is supported on x64.
-- Windows Server: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
-- Windows Server Core: Windows Server 2012 R2 is supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
+- Windows Server Core: Windows Server 2012 and 2012 R2 are supported with [Extended Security Updates (ESU)](https://learn.microsoft.com/windows-server/get-started/extended-security-updates-overview).
 
 [0]: https://www.android.com/
 [1]: https://support.google.com/android
@@ -127,8 +127,6 @@ OS versions that are out of support by the OS publisher are not tested or suppor
 | Windows               | 11 23H2 (W) | [2025-11-11](https://learn.microsoft.com/windows/release-health/windows11-release-information) |
 | Windows               | 11 22H2 (E) | [2025-10-14](https://learn.microsoft.com/windows/release-health/windows11-release-information) |
 | Windows               | 10 22H2     | [2025-10-14](https://learn.microsoft.com/windows/release-health/release-information)           |
-| Windows Server        | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)               |
-| Windows Server Core   | 2012        | [2023-10-10](https://learn.microsoft.com/lifecycle/products/windows-server-2012)               |
 | iOS                   | 16          | [2025-03-31](https://developer.apple.com/documentation/ios-ipados-release-notes/ios-16-release-notes)    |
 | iOS                   | 17          | 2024-11-19    |
 | iPadOS                | 16          | [2025-03-31](https://developer.apple.com/documentation/ios-ipados-release-notes/ipados-16-release-notes) |