Steve Lee (SteveL-MSFT) · Oct 26, 2026 · Oct 26, 2026 · Oct 26, 2026 · Oct 26, 2026 · Oct 27, 2026
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -86,6 +86,17 @@ changes since the last release, see the [diff on GitHub][unreleased].
 
 ### Changed
 
+- **Breaking change:** PowerShell adapters now expose embedded resource schemas instead of an
+  always-successful `validate` operation. Resource input names must use the spelling reported by
+  `dsc resource schema -r '<moduleName>/<resourceName>'`, including camelCase key, mandatory, and
+  optional names. Unknown names and schema-invalid values are rejected before invocation.
+  Single-resource get, set, test, and export output uses camelCase names and omits unset optional
+  null properties unless explicitly nullable. Deprecated full-configuration wrapper output is
+  unchanged. Migrate existing configurations and output consumers to the generated schema's
+  property names and nullability.
+
+  Related PR: [#1775](https://github.com/PowerShell/DSC/pull/1775)
+
 - Extensions that implement the `secret` capability must now define the `args` property for the
   `secret` command with exactly one secret name input argument (`nameArg`) and at most one vault
   input argument (`vaultArg`). Previously, an extension could omit the secret name input argument,

diff --git a/adapters/powershell/PowerShell_adapter.dsc.resource.json b/adapters/powershell/PowerShell_adapter.dsc.resource.json
@@ -93,6 +93,9 @@
         "return": "state"
     },
     "export": {
+        "schema": {
+            "embedded": { "type": "object" }
+        },
         "executable": "pwsh",
         "args": [
             "-NoLogo",
@@ -114,18 +117,10 @@
         "input": "stdin",
         "return": "state"
     },
-    "validate": {
-        "executable": "pwsh",
-        "args": [
-            "-NoLogo",
-            "-NonInteractive",
-            "-NoProfile",
-            "-ExecutionPolicy",
-            "Bypass",
-            "-Command",
-            "$Input | ./psDscAdapter/powershell.resource.ps1 Validate"
-        ],
-        "input": "stdin"
+    "schema": {
+        "embedded": {
+            "type": "object"
+        }
     },
     "exitCodes": {
         "0": "Success",

diff --git a/adapters/powershell/Tests/PSAdapted.tests.ps1 b/adapters/powershell/Tests/PSAdapted.tests.ps1
@@ -20,6 +20,16 @@ Describe 'Tests for PS adapted manifests' {
         $out.actualState.Value | Should -Be 42
     }
 
+    It 'Rejects input that does not match the adapted resource embedded schema' -ForEach @(
+        @{ Json = '{"name":42}' }
+        @{ Json = '{"name":"hello","value":"invalid"}' }
+        @{ Json = '{"name":"hello","unknown":true}' }
+    ) {
+        $null = dsc resource get -r 'PSAdaptedTestClassResource/PSAdaptedTestClass' -i $Json 2> (Join-Path $TestDrive 'schema-error.log')
+        $LASTEXITCODE | Should -Not -Be 0
+        Get-Content -Raw (Join-Path $TestDrive 'schema-error.log') | Should -Match 'schema|properties'
+    }
+
     It 'Get operation works if adapted resource is in a path with spaces' {
         $resourcePath = Join-Path -Path $TestDrive -ChildPath 'Path with spaces'
         New-Item -Path $resourcePath -ItemType Directory | Out-Null

diff --git a/adapters/powershell/Tests/PSAdaptedTestClassResource.dsc.adaptedResource.json b/adapters/powershell/Tests/PSAdaptedTestClassResource.dsc.adaptedResource.json
@@ -11,25 +11,23 @@
     "requireAdapter": "Microsoft.Adapter/PowerShell",
     "path": "PSAdaptedTestClassResource.psd1",
     "schema": {
-        "embedded": {
-            "$schema": "http://json-schema.org/draft-07/schema#",
-            "$id": "https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/resources/PSAdaptedTestClass/v0.1.0/schema.json",
-            "title": "PSAdaptedTestClass",
-            "description": "An adapted resource for testing.",
-            "type": "object",
-            "required": [],
-            "additionalProperties": false,
-            "properties": {
-                "name": {
-                    "type": "string",
-                    "title": "Name",
-                    "description": "This is property one of the adapted resource."
-                },
-                "value": {
-                    "type": "integer",
-                    "title": "Value",
-                    "description": "The value of the adapted resource instance."
-                }
+        "$schema": "http://json-schema.org/draft-07/schema#",
+        "$id": "https://raw.githubusercontent.com/PowerShell/DSC/main/schemas/resources/PSAdaptedTestClass/v0.1.0/schema.json",
+        "title": "PSAdaptedTestClass",
+        "description": "An adapted resource for testing.",
+        "type": "object",
+        "required": [],
+        "additionalProperties": false,
+        "properties": {
+            "name": {
+                "type": "string",
+                "title": "Name",
+                "description": "This is property one of the adapted resource."
+            },
+            "value": {
+                "type": "integer",
+                "title": "Value",
+                "description": "The value of the adapted resource instance."
             }
         }
     }

diff --git a/adapters/powershell/Tests/powershellgroup.config.tests.ps1 b/adapters/powershell/Tests/powershellgroup.config.tests.ps1
@@ -269,10 +269,10 @@ Describe 'PowerShell adapter resource tests' {
               directives:
                 $directive$adapter
               properties:
-                Name: 'TestClassResource1'
-                HashTableProp:
+                name: 'TestClassResource1'
+                hashTableProp:
                   Name: 'DSCv3'
-                Prop1: foo
+                prop1: foo
 "@
     $out = dsc -l trace config $operation -i $yaml 2> $TestDrive/tracing.txt
     $text = $out | Out-String
@@ -332,8 +332,8 @@ Describe 'PowerShell adapter resource tests' {
         - name: Class-resource credential info
           type: TestClassResource/TestClassResource
           properties:
-            Name: 'TestClassResource'
-            Credential:
+            name: 'TestClassResource'
+            credential:
               UserName: 'User'
               OtherProperty: 'Password'
 "@
@@ -350,8 +350,8 @@ Describe 'PowerShell adapter resource tests' {
         - name: Class-resource Info
           type: TestClassResource/TestClassResource
           properties:
-            Name: 'TestClassResource'
-            Ensure: 'Present'
+            name: 'TestClassResource'
+            ensure: 'Present'
 "@
 
     $out = dsc config get -i $yaml | ConvertFrom-Json
@@ -385,9 +385,9 @@ Describe 'PowerShell adapter resource tests' {
         - name: Class-resource Info
           type: TestClassResource/TestClassResource
           properties:
-            Name: EchoBack
-            Prop1: "[[this is a string literal]"
-            EnumProp: 'Expected'
+            name: EchoBack
+            prop1: "[[this is a string literal]"
+            enumProp: 'Expected'
 "@
     $out = dsc config get -i $yaml | ConvertFrom-Json
     $LASTEXITCODE | Should -Be 0
@@ -396,4 +396,3 @@ Describe 'PowerShell adapter resource tests' {
     $out.results.result.actualState.EnumProp | Should -BeExactly 'Expected'
   }
 }
-
diff --git a/adapters/powershell/Tests/powershellgroup.resource.tests.ps1 b/adapters/powershell/Tests/powershellgroup.resource.tests.ps1
@@ -31,11 +31,15 @@ Describe 'PowerShell adapter resource tests' {
         ($resources | Where-Object { $_.Type -eq 'TestClassResource/TestClassResource' }).Count | Should -Be 1
         ($resources | Where-Object -Property type -EQ 'TestClassResource/TestClassResource').capabilities | Should -BeIn @('get', 'set', 'test', 'export')
         ($resources | Where-Object -Property type -EQ 'TestClassResource/NoExport').capabilities | Should -BeIn @('get', 'set', 'test')
+        $resourceSchema = ($resources | Where-Object -Property type -EQ 'TestClassResource/TestClassResource').schema
+        $resourceSchema.type | Should -BeExactly 'object'
+        $resourceSchema.properties.baseProperty.type | Should -BeExactly 'string'
+        $resourceSchema.properties.PSObject.Properties.Name | Should -Not -Contain 'NonDscProperty'
     }
 
     It 'Get works on class-based resource' {
 
-        $r = "{'Name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
+        $r = "{'name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.actualState.Prop1 | Should -BeExactly 'ValueForProp1'
@@ -48,39 +52,39 @@ Describe 'PowerShell adapter resource tests' {
 
     It 'Get uses enum names on class-based resource' {
 
-        $r = "{'Name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
+        $r = "{'name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.actualState.EnumProp | Should -BeExactly 'Expected'
     }
 
     It 'Get should return the correct properties on class-based resource' {
-        $r = "{'Name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
+        $r = "{'name':'TestClassResource1'}" | dsc resource get -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json -AsHashtable
-        $res.actualState.ContainsKey('Name') | Should -Be $True
-        $res.actualState.ContainsKey('Prop1') | Should -Be $True
-        $res.actualState.ContainsKey('HashTableProp') | Should -Be $True
-        $res.actualState.ContainsKey('EnumProp') | Should -Be $True
-        $res.actualState.ContainsKey('Credential') | Should -Be $True
-        $res.actualState.ContainsKey('Ensure') | Should -Be $True
-        $res.actualState.ContainsKey('BaseProperty') | Should -Be $True
-        $res.actualState.ContainsKey('HiddenDscProperty') | Should -Be $True
+        $res.actualState.Keys -ccontains 'name' | Should -BeTrue
+        $res.actualState.Keys -ccontains 'prop1' | Should -BeTrue
+        $res.actualState.Keys -ccontains 'enumProp' | Should -BeTrue
+        $res.actualState.Keys -ccontains 'ensure' | Should -BeTrue
+        $res.actualState.ContainsKey('hashTableProp') | Should -BeFalse
+        $res.actualState.ContainsKey('credential') | Should -BeFalse
+        $res.actualState.ContainsKey('baseProperty') | Should -BeFalse
+        $res.actualState.ContainsKey('hiddenDscProperty') | Should -BeFalse
         $res.actualState.ContainsKey('NonDscProperty') | Should -Be $False
         $res.actualState.ContainsKey('HiddenNonDscProperty') | Should -Be $False
     }
 
     It 'Test works on class-based resource' {
 
-        $r = "{'Name':'TestClassResource1','Prop1':'ValueForProp1'}" | dsc resource test -r 'TestClassResource/TestClassResource' -f -
+        $r = "{'name':'TestClassResource1','prop1':'ValueForProp1'}" | dsc resource test -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.InDesiredState | Should -Be $True -Because $r
     }
 
     It 'Set works on class-based resource' {
 
-        $r = "{'Name':'TestClassResource1','Prop1':'ValueForProp1'}" | dsc resource set -r 'TestClassResource/TestClassResource' -f -
+        $r = "{'name':'TestClassResource1','prop1':'ValueForProp1'}" | dsc resource set -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.afterState.Prop1 | Should -BeExactly 'ValueForProp1'
@@ -373,7 +377,7 @@ Describe 'PowerShell adapter resource tests' {
     }
 
     It 'Can process a key-value pair object' {
-        $r = '{"HashTableProp":{"Name":"DSCv3"},"Name":"TestClassResource1"}' | dsc resource get -r 'TestClassResource/TestClassResource' -f -
+        $r = '{"hashTableProp":{"Name":"DSCv3"},"name":"TestClassResource1"}' | dsc resource get -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.actualState.HashTableProp.Name | Should -Be 'DSCv3'
@@ -392,50 +396,50 @@ Describe 'PowerShell adapter resource tests' {
     }
 
     It 'Can process SecureString property' {
-        $r = '{"Name":"TestClassResource1","SecureStringProp":"MySecretValue"}' | dsc resource get -r 'TestClassResource/TestClassResource' -f -
+        $r = '{"name":"TestClassResource1","secureStringProp":"MySecretValue"}' | dsc resource get -r 'TestClassResource/TestClassResource' -f -
         $LASTEXITCODE | Should -Be 0
         $res = $r | ConvertFrom-Json
         $res.actualState.SecureStringProp | Should -Not -BeNullOrEmpty
     }
 
     Context 'Tracing works' {
         It 'Error messages come from Write-Error' {
-            $null = dsc -l error resource set -r TestClassResource/StreamResource -i '{"Name":"TestClassResource1"}' 2> $TestDrive/error.log
+            $null = dsc -l error resource set -r TestClassResource/StreamResource -i '{"name":"TestClassResource1"}' 2> $TestDrive/error.log
             $logContent = Get-Content -Path $TestDrive/error.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'ERROR .*? This is an Error message' -Because $logContent
         }
 
         It 'Warning messages come from Write-Warning' {
-            $null = "{'Name':'TestClassResource1','Prop1':'ValueForProp1'}" | dsc -l warn resource get -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/warning.log
+            $null = "{'name':'TestClassResource1','prop1':'ValueForProp1'}" | dsc -l warn resource get -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/warning.log
             $logContent = Get-Content -Path $TestDrive/warning.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'WARN .*? This is a Warning message' -Because $logContent
         }
 
         It 'Info messages come from Write-Host' {
-            $null = "{'Name':'TestClassResource1'}" | dsc -l info resource test -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/verbose.log
+            $null = "{'name':'TestClassResource1'}" | dsc -l info resource test -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/verbose.log
             $logContent = Get-Content -Path $TestDrive/verbose.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'INFO .*? This is a Host message' -Because $logContent
         }
 
         It 'Debug messages come from Write-Verbose' {
-            $null = "{'Name':'TestClassResource1'}" | dsc -l debug resource set -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/debug.log
+            $null = "{'name':'TestClassResource1'}" | dsc -l debug resource set -r 'TestClassResource/StreamResource' -f - 2> $TestDrive/debug.log
             $logContent = Get-Content -Path $TestDrive/debug.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'DEBUG .*? This is a Verbose message' -Because $logContent
         }
 
         It 'Trace messages come from Write-Debug' {
-            $null = dsc -l trace resource set -r TestClassResource/StreamResource -i '{"Name":"TestClassResource1"}' 2> $TestDrive/trace.log
+            $null = dsc -l trace resource set -r TestClassResource/StreamResource -i '{"name":"TestClassResource1"}' 2> $TestDrive/trace.log
             $logContent = Get-Content -Path $TestDrive/trace.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'TRACE .*? This is a Debug message' -Because $logContent
         }
 
         It 'Trace messages come from Write-Information' {
-            $null = dsc -l trace resource test -r TestClassResource/StreamResource -i '{"Name":"TestClassResource1"}' 2> $TestDrive/trace_info.log
+            $null = dsc -l trace resource test -r TestClassResource/StreamResource -i '{"name":"TestClassResource1"}' 2> $TestDrive/trace_info.log
             $logContent = Get-Content -Path $TestDrive/trace_info.log -Raw
             $LASTEXITCODE | Should -Be 0 -Because $logContent
             $logContent | Should -Match 'INFO .*? This is an Information message' -Because $logContent