Moved all extension methods into extension blocks (#1155)

app/MindWork AI Studio/Assistants/Agenda/NumberParticipantsExtensions.cs

@@ -4,23 +4,26 @@ public static class NumberParticipantsExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(NumberParticipantsExtensions).Namespace, nameof(NumberParticipantsExtensions));
     
-    public static string Name(this NumberParticipants numberParticipants) => numberParticipants switch
+    extension(NumberParticipants numberParticipants)
     {
-        NumberParticipants.NOT_SPECIFIED => TB("Please select how many participants are expected"),
+        public string Name() => numberParticipants switch
+        {
+            NumberParticipants.NOT_SPECIFIED => TB("Please select how many participants are expected"),
         
-        NumberParticipants.PEER_TO_PEER => TB("2 (peer to peer)"),
+            NumberParticipants.PEER_TO_PEER => TB("2 (peer to peer)"),
         
-        NumberParticipants.SMALL_GROUP => TB("3 - 5 (small group)"),
-        NumberParticipants.LARGE_GROUP => TB("6 - 12 (large group)"),
-        NumberParticipants.MULTIPLE_SMALL_GROUPS => TB("13 - 20 (multiple small groups)"),
-        NumberParticipants.MULTIPLE_LARGE_GROUPS => TB("21 - 30 (multiple large groups)"),
+            NumberParticipants.SMALL_GROUP => TB("3 - 5 (small group)"),
+            NumberParticipants.LARGE_GROUP => TB("6 - 12 (large group)"),
+            NumberParticipants.MULTIPLE_SMALL_GROUPS => TB("13 - 20 (multiple small groups)"),
+            NumberParticipants.MULTIPLE_LARGE_GROUPS => TB("21 - 30 (multiple large groups)"),
         
-        NumberParticipants.SYMPOSIUM => TB("31 - 100 (symposium)"),
-        NumberParticipants.CONFERENCE => TB("101 - 200 (conference)"),
-        NumberParticipants.CONGRESS => TB("201 - 1,000 (congress)"),
+            NumberParticipants.SYMPOSIUM => TB("31 - 100 (symposium)"),
+            NumberParticipants.CONFERENCE => TB("101 - 200 (conference)"),
+            NumberParticipants.CONGRESS => TB("201 - 1,000 (congress)"),
         
-        NumberParticipants.LARGE_EVENT => TB("1,000+ (large event)"),
+            NumberParticipants.LARGE_EVENT => TB("1,000+ (large event)"),
         
-        _ => "Unknown"
-    };
+            _ => "Unknown"
+        };
+    }
 }

app/MindWork AI Studio/Assistants/BatchProcessing/BatchProcessingCsvSeparatorExtensions.cs

@@ -6,27 +6,30 @@ public static class BatchProcessingCsvSeparatorExtensions
 
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(BatchProcessingCsvSeparatorExtensions).Namespace, nameof(BatchProcessingCsvSeparatorExtensions));
 
-    public static string Name(this BatchProcessingCsvSeparator separator) => separator switch
+    extension(BatchProcessingCsvSeparator separator)
     {
-        BatchProcessingCsvSeparator.COMMA => TB("Comma (,)"),
-        BatchProcessingCsvSeparator.SEMICOLON => TB("Semicolon (;)"),
-        BatchProcessingCsvSeparator.PIPE => TB("Vertical bar (|)"),
-        BatchProcessingCsvSeparator.TAB => TB("Tab"),
-        BatchProcessingCsvSeparator.CUSTOM => TB("Custom character"),
+        public string Name() => separator switch
+        {
+            BatchProcessingCsvSeparator.COMMA => TB("Comma (,)"),
+            BatchProcessingCsvSeparator.SEMICOLON => TB("Semicolon (;)"),
+            BatchProcessingCsvSeparator.PIPE => TB("Vertical bar (|)"),
+            BatchProcessingCsvSeparator.TAB => TB("Tab"),
+            BatchProcessingCsvSeparator.CUSTOM => TB("Custom character"),
 
-        _ => TB("Unknown"),
-    };
+            _ => TB("Unknown"),
+        };
 
-    public static char Character(this BatchProcessingCsvSeparator separator, string customSeparator) => separator switch
-    {
-        BatchProcessingCsvSeparator.COMMA => ',',
-        BatchProcessingCsvSeparator.SEMICOLON => ';',
-        BatchProcessingCsvSeparator.PIPE => '|',
-        BatchProcessingCsvSeparator.TAB => '\t',
-        BatchProcessingCsvSeparator.CUSTOM when IsValidCustomSeparator(customSeparator) => customSeparator[0],
+        public char Character(string customSeparator) => separator switch
+        {
+            BatchProcessingCsvSeparator.COMMA => ',',
+            BatchProcessingCsvSeparator.SEMICOLON => ';',
+            BatchProcessingCsvSeparator.PIPE => '|',
+            BatchProcessingCsvSeparator.TAB => '\t',
+            BatchProcessingCsvSeparator.CUSTOM when IsValidCustomSeparator(customSeparator) => customSeparator[0],
 
-        _ => DEFAULT_SEPARATOR,
-    };
+            _ => DEFAULT_SEPARATOR,
+        };
+    }
 
     internal static bool IsValidCustomSeparator(string separator)
     {

app/MindWork AI Studio/Assistants/BatchProcessing/BatchProcessingOutputModeExtensions.cs

@@ -4,11 +4,14 @@ public static class BatchProcessingOutputModeExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(BatchProcessingOutputModeExtensions).Namespace, nameof(BatchProcessingOutputModeExtensions));
 
-    public static string Name(this BatchProcessingOutputMode outputMode) => outputMode switch
+    extension(BatchProcessingOutputMode outputMode)
     {
-        BatchProcessingOutputMode.INDIVIDUAL_FILES => TB("One file per document"),
-        BatchProcessingOutputMode.TABLE_ONLY => TB("One CSV results table, where each answer becomes one row"),
+        public string Name() => outputMode switch
+        {
+            BatchProcessingOutputMode.INDIVIDUAL_FILES => TB("One file per document"),
+            BatchProcessingOutputMode.TABLE_ONLY => TB("One CSV results table, where each answer becomes one row"),
 
-        _ => TB("Unknown output mode"),
-    };
+            _ => TB("Unknown output mode"),
+        };
+    }
 }

app/MindWork AI Studio/Assistants/BatchProcessing/BatchProcessingPromptSourceExtensions.cs

@@ -4,12 +4,15 @@ public static class BatchProcessingPromptSourceExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(BatchProcessingPromptSourceExtensions).Namespace, nameof(BatchProcessingPromptSourceExtensions));
 
-    public static string Name(this BatchProcessingPromptSource promptSource) => promptSource switch
+    extension(BatchProcessingPromptSource promptSource)
     {
-        BatchProcessingPromptSource.FREE_PROMPT => TB("Use a free prompt"),
-        BatchProcessingPromptSource.POLICY => TB("Use a document analysis policy"),
-        BatchProcessingPromptSource.FILE_IMPORT => TB("Import from a file (.md)"),
+        public string Name() => promptSource switch
+        {
+            BatchProcessingPromptSource.FREE_PROMPT => TB("Use a free prompt"),
+            BatchProcessingPromptSource.POLICY => TB("Use a document analysis policy"),
+            BatchProcessingPromptSource.FILE_IMPORT => TB("Import from a file (.md)"),
 
-        _ => TB("Unknown prompt source"),
-    };
+            _ => TB("Unknown prompt source"),
+        };
+    }
 }

app/MindWork AI Studio/Assistants/Builder/LuaResponseParseErrorExtension.cs

@@ -2,22 +2,25 @@ namespace AIStudio.Assistants.Builder;
 
 public static class LuaResponseParseErrorExtension
 {
-    private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(LuaResponseParseError).Namespace, nameof(LuaResponseParseError));
+    private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(LuaResponseParseErrorExtension).Namespace, nameof(LuaResponseParseErrorExtension));
 
-    public static string GetMessage(this LuaResponseParseError parseError, string technicalDetails) => parseError switch
+    extension(LuaResponseParseError parseError)
     {
-        LuaResponseParseError.MISSING_JSON_OBJECT => TB("The model response is missing or unreadable."),
-        LuaResponseParseError.INVALID_JSON => string.IsNullOrWhiteSpace(technicalDetails)
-            ? TB("The model returned an invalid response.")
-            : string.Format(TB("The model returned an invalid response: {0}"), technicalDetails),
-        LuaResponseParseError.EMPTY_JSON_OBJECT => TB("The model returned an empty JSON object."),
-        LuaResponseParseError.UNSUPPORTED_SCHEMA_VERSION => TB("The model responded with an unsupported or deprecated JSON schema."),
-        LuaResponseParseError.MISSING_PLUGIN_METADATA => TB("The model's answer is missing the plugin metadata."),
-        LuaResponseParseError.MISSING_ASSISTANT_METADATA => TB("The model's answer is missing the assistant metadata."),
-        LuaResponseParseError.INCOMPLETE_PLUGIN_METADATA => TB("The model's answer contains incomplete plugin metadata."),
-        LuaResponseParseError.INCOMPLETE_ASSISTANT_METADATA => TB("The model's answer contains incomplete assistant metadata."),
-        LuaResponseParseError.MISSING_LUA => TB("The model response does not contain the generated Lua plugin code."),
-        LuaResponseParseError.LUA_MISSING_ID => TB("The generated Lua plugin code does not contain a readable plugin ID."),
-        _ => TB("The model returned an unusable JSON response."),
-    };
+        public string GetMessage(string technicalDetails) => parseError switch
+        {
+            LuaResponseParseError.MISSING_JSON_OBJECT => TB("The model response is missing or unreadable."),
+            LuaResponseParseError.INVALID_JSON => string.IsNullOrWhiteSpace(technicalDetails)
+                ? TB("The model returned an invalid response.")
+                : string.Format(TB("The model returned an invalid response: {0}"), technicalDetails),
+            LuaResponseParseError.EMPTY_JSON_OBJECT => TB("The model returned an empty JSON object."),
+            LuaResponseParseError.UNSUPPORTED_SCHEMA_VERSION => TB("The model responded with an unsupported or deprecated JSON schema."),
+            LuaResponseParseError.MISSING_PLUGIN_METADATA => TB("The model's answer is missing the plugin metadata."),
+            LuaResponseParseError.MISSING_ASSISTANT_METADATA => TB("The model's answer is missing the assistant metadata."),
+            LuaResponseParseError.INCOMPLETE_PLUGIN_METADATA => TB("The model's answer contains incomplete plugin metadata."),
+            LuaResponseParseError.INCOMPLETE_ASSISTANT_METADATA => TB("The model's answer contains incomplete assistant metadata."),
+            LuaResponseParseError.MISSING_LUA => TB("The model response does not contain the generated Lua plugin code."),
+            LuaResponseParseError.LUA_MISSING_ID => TB("The generated Lua plugin code does not contain a readable plugin ID."),
+            _ => TB("The model returned an unusable JSON response."),
+        };
+    }
 }

app/MindWork AI Studio/Assistants/Coding/CommonCodingLanguageExtensions.cs

@@ -4,42 +4,45 @@ public static class CommonCodingLanguageExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(CommonCodingLanguageExtensions).Namespace, nameof(CommonCodingLanguageExtensions));
     
-    public static string Name(this CommonCodingLanguages language) => language switch
-    { 
-        CommonCodingLanguages.NONE => TB("None"),
+    extension(CommonCodingLanguages language)
+    {
+        public string Name() => language switch
+        { 
+            CommonCodingLanguages.NONE => TB("None"),
         
-        CommonCodingLanguages.BASH => "Bash",
-        CommonCodingLanguages.BLAZOR => ".NET Blazor",
-        CommonCodingLanguages.C => "C",
-        CommonCodingLanguages.CPP => "C++",
-        CommonCodingLanguages.CSHARP => "C#",
-        CommonCodingLanguages.CSS => "CSS",
-        CommonCodingLanguages.FORTRAN => "Fortran",
-        CommonCodingLanguages.GDSCRIPT => "GDScript",
-        CommonCodingLanguages.GO => "Go",
-        CommonCodingLanguages.HTML => "HTML",
-        CommonCodingLanguages.JAVA => "Java",
-        CommonCodingLanguages.JAVASCRIPT => "JavaScript",
-        CommonCodingLanguages.JSON => "JSON",
-        CommonCodingLanguages.JULIA => "Julia",
-        CommonCodingLanguages.KOTLIN => "Kotlin",
-        CommonCodingLanguages.LUA => "Lua",
-        CommonCodingLanguages.MARKDOWN => "Markdown",
-        CommonCodingLanguages.MATHEMATICA => "Mathematica",
-        CommonCodingLanguages.MATLAB => "MATLAB",
-        CommonCodingLanguages.PHP => "PHP",
-        CommonCodingLanguages.POWERSHELL => "PowerShell",
-        CommonCodingLanguages.PROLOG => "Prolog",
-        CommonCodingLanguages.PYTHON => "Python",
-        CommonCodingLanguages.R => "R",
-        CommonCodingLanguages.RUBY => "Ruby",
-        CommonCodingLanguages.RUST => "Rust",
-        CommonCodingLanguages.SQL => "SQL",
-        CommonCodingLanguages.SWIFT => "Swift",
-        CommonCodingLanguages.TYPESCRIPT => "TypeScript",
-        CommonCodingLanguages.XML => "XML",
+            CommonCodingLanguages.BASH => "Bash",
+            CommonCodingLanguages.BLAZOR => ".NET Blazor",
+            CommonCodingLanguages.C => "C",
+            CommonCodingLanguages.CPP => "C++",
+            CommonCodingLanguages.CSHARP => "C#",
+            CommonCodingLanguages.CSS => "CSS",
+            CommonCodingLanguages.FORTRAN => "Fortran",
+            CommonCodingLanguages.GDSCRIPT => "GDScript",
+            CommonCodingLanguages.GO => "Go",
+            CommonCodingLanguages.HTML => "HTML",
+            CommonCodingLanguages.JAVA => "Java",
+            CommonCodingLanguages.JAVASCRIPT => "JavaScript",
+            CommonCodingLanguages.JSON => "JSON",
+            CommonCodingLanguages.JULIA => "Julia",
+            CommonCodingLanguages.KOTLIN => "Kotlin",
+            CommonCodingLanguages.LUA => "Lua",
+            CommonCodingLanguages.MARKDOWN => "Markdown",
+            CommonCodingLanguages.MATHEMATICA => "Mathematica",
+            CommonCodingLanguages.MATLAB => "MATLAB",
+            CommonCodingLanguages.PHP => "PHP",
+            CommonCodingLanguages.POWERSHELL => "PowerShell",
+            CommonCodingLanguages.PROLOG => "Prolog",
+            CommonCodingLanguages.PYTHON => "Python",
+            CommonCodingLanguages.R => "R",
+            CommonCodingLanguages.RUBY => "Ruby",
+            CommonCodingLanguages.RUST => "Rust",
+            CommonCodingLanguages.SQL => "SQL",
+            CommonCodingLanguages.SWIFT => "Swift",
+            CommonCodingLanguages.TYPESCRIPT => "TypeScript",
+            CommonCodingLanguages.XML => "XML",
         
-        CommonCodingLanguages.OTHER => TB("Other"),
-        _ => TB("Unknown")
-    };
+            CommonCodingLanguages.OTHER => TB("Other"),
+            _ => TB("Unknown")
+        };
+    }
 }

app/MindWork AI Studio/Assistants/EMail/WritingStylesExtensions.cs

@@ -4,23 +4,26 @@ public static class WritingStylesExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(WritingStylesExtensions).Namespace, nameof(WritingStylesExtensions));
     
-    public static string Name(this WritingStyles style) => style switch
+    extension(WritingStyles style)
     {
-        WritingStyles.ACADEMIC => TB("Academic"),
-        WritingStyles.PERSONAL => TB("Personal"),
-        WritingStyles.BUSINESS_FORMAL => TB("Business formal"),
-        WritingStyles.BUSINESS_INFORMAL => TB("Business informal"),
+        public string Name() => style switch
+        {
+            WritingStyles.ACADEMIC => TB("Academic"),
+            WritingStyles.PERSONAL => TB("Personal"),
+            WritingStyles.BUSINESS_FORMAL => TB("Business formal"),
+            WritingStyles.BUSINESS_INFORMAL => TB("Business informal"),
         
-        _ => TB("Not specified"),
-    };
-    
-    public static string Prompt(this WritingStyles style) => style switch
-    {
-        WritingStyles.ACADEMIC => "Use an academic style for communication in an academic context like between students and professors.",
-        WritingStyles.PERSONAL => "Use a personal style for communication between friends and family.",
-        WritingStyles.BUSINESS_FORMAL => "Use a formal business style for this e-mail.",
-        WritingStyles.BUSINESS_INFORMAL => "Use an informal business style for this e-mail.",
+            _ => TB("Not specified"),
+        };
+
+        public string Prompt() => style switch
+        {
+            WritingStyles.ACADEMIC => "Use an academic style for communication in an academic context like between students and professors.",
+            WritingStyles.PERSONAL => "Use a personal style for communication between friends and family.",
+            WritingStyles.BUSINESS_FORMAL => "Use a formal business style for this e-mail.",
+            WritingStyles.BUSINESS_INFORMAL => "Use an informal business style for this e-mail.",
         
-        _ => "Use a formal business style for this e-mail.",
-    };
+            _ => "Use a formal business style for this e-mail.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/ERI/AllowedLLMProvidersExtensions.cs

@@ -4,12 +4,15 @@ public static class AllowedLLMProvidersExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AllowedLLMProvidersExtensions).Namespace, nameof(AllowedLLMProvidersExtensions));
     
-    public static string Description(this AllowedLLMProviders provider) => provider switch
+    extension(AllowedLLMProviders provider)
     {
-        AllowedLLMProviders.NONE => TB("Please select what kind of LLM provider are allowed for this data source"),
-        AllowedLLMProviders.ANY => TB("Any LLM provider is allowed: users might choose a cloud-based or a self-hosted provider"),
-        AllowedLLMProviders.SELF_HOSTED => TB("Self-hosted LLM providers are allowed: users cannot choose any cloud-based provider"),
+        public string Description() => provider switch
+        {
+            AllowedLLMProviders.NONE => TB("Please select what kind of LLM provider are allowed for this data source"),
+            AllowedLLMProviders.ANY => TB("Any LLM provider is allowed: users might choose a cloud-based or a self-hosted provider"),
+            AllowedLLMProviders.SELF_HOSTED => TB("Self-hosted LLM providers are allowed: users cannot choose any cloud-based provider"),
 
-        _ => TB("Unknown option was selected")
-    };
+            _ => TB("Unknown option was selected")
+        };
+    }
 }

app/MindWork AI Studio/Assistants/ERI/AuthExtensions.cs

@@ -4,25 +4,28 @@ public static class AuthExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AuthExtensions).Namespace, nameof(AuthExtensions));
     
-    public static string Name(this Auth auth) => auth switch
+    extension(Auth auth)
     {
-        Auth.NONE => TB("No login necessary: useful for public data sources"),
+        public string Name() => auth switch
+        {
+            Auth.NONE => TB("No login necessary: useful for public data sources"),
         
-        Auth.KERBEROS => TB("Login by single-sign-on (SSO) using Kerberos: very complex to implement and to operate, useful for many users"),
-        Auth.USERNAME_PASSWORD => TB("Login by username and password: simple to implement and to operate, useful for few users; easy to use for users"),
-        Auth.TOKEN => TB("Login by token: simple to implement and to operate, useful for few users; unusual for many users"),
+            Auth.KERBEROS => TB("Login by single-sign-on (SSO) using Kerberos: very complex to implement and to operate, useful for many users"),
+            Auth.USERNAME_PASSWORD => TB("Login by username and password: simple to implement and to operate, useful for few users; easy to use for users"),
+            Auth.TOKEN => TB("Login by token: simple to implement and to operate, useful for few users; unusual for many users"),
         
-        _ => TB("Unknown login method")
-    };
-    
-    public static string ToPrompt(this Auth auth) => auth switch
-    {
-        Auth.NONE => "No login is necessary, the data source is public.",
+            _ => TB("Unknown login method")
+        };
+
+        public string ToPrompt() => auth switch
+        {
+            Auth.NONE => "No login is necessary, the data source is public.",
         
-        Auth.KERBEROS => "Login by single-sign-on (SSO) using Kerberos.",
-        Auth.USERNAME_PASSWORD => "Login by username and password.",
-        Auth.TOKEN => "Login by static token per user.",
+            Auth.KERBEROS => "Login by single-sign-on (SSO) using Kerberos.",
+            Auth.USERNAME_PASSWORD => "Login by username and password.",
+            Auth.TOKEN => "Login by static token per user.",
         
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+    }
 }

app/MindWork AI Studio/Assistants/ERI/DataSourcesExtensions.cs

@@ -4,18 +4,21 @@ public static class DataSourcesExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(DataSourcesExtensions).Namespace, nameof(DataSourcesExtensions));
     
-    public static string Name(this DataSources dataSource) => dataSource switch
+    extension(DataSources dataSource)
     {
-        DataSources.NONE => TB("No data source selected"),
-        DataSources.CUSTOM => TB("Custom description"),
+        public string Name() => dataSource switch
+        {
+            DataSources.NONE => TB("No data source selected"),
+            DataSources.CUSTOM => TB("Custom description"),
         
-        DataSources.FILE_SYSTEM => TB("File system (local or network share)"),
-        DataSources.OBJECT_STORAGE => TB("Object storage, like Amazon S3, MinIO, etc."),
-        DataSources.KEY_VALUE_STORE => TB("Key-Value store, like Redis, etc."),
-        DataSources.DOCUMENT_STORE => TB("Document store, like MongoDB, etc."),
-        DataSources.RELATIONAL_DATABASE => TB("Relational database, like MySQL, PostgreSQL, etc."),
-        DataSources.GRAPH_DATABASE => TB("Graph database, like Neo4j, ArangoDB, etc."),
+            DataSources.FILE_SYSTEM => TB("File system (local or network share)"),
+            DataSources.OBJECT_STORAGE => TB("Object storage, like Amazon S3, MinIO, etc."),
+            DataSources.KEY_VALUE_STORE => TB("Key-Value store, like Redis, etc."),
+            DataSources.DOCUMENT_STORE => TB("Document store, like MongoDB, etc."),
+            DataSources.RELATIONAL_DATABASE => TB("Relational database, like MySQL, PostgreSQL, etc."),
+            DataSources.GRAPH_DATABASE => TB("Graph database, like Neo4j, ArangoDB, etc."),
         
-        _ => TB("Unknown data source")
-    };
+            _ => TB("Unknown data source")
+        };
+    }
 }

app/MindWork AI Studio/Assistants/ERI/ERIServerFileOutcomeExtensions.cs

@@ -11,13 +11,16 @@ internal static class ERIServerFileOutcomeExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(ERIServerFileOutcomeExtensions).Namespace, nameof(ERIServerFileOutcomeExtensions));
 
-    /// <summary>
-    /// Gets the localized message which explains why a file was not written.
-    /// </summary>
     /// <param name="outcome">What became of the file.</param>
-    /// <param name="file">The path of the file, as the model named it.</param>
-    /// <returns>The localized message.</returns>
-    internal static string ToUserMessage(this ERIServerFileOutcome outcome, string file) => string.Format(ToUserMessageFormat(outcome), file);
+    extension(ERIServerFileOutcome outcome)
+    {
+        /// <summary>
+        /// Gets the localized message which explains why a file was not written.
+        /// </summary>
+        /// <param name="file">The path of the file, as the model named it.</param>
+        /// <returns>The localized message.</returns>
+        internal string ToUserMessage(string file) => string.Format(ToUserMessageFormat(outcome), file);
+    }
 
     private static string ToUserMessageFormat(ERIServerFileOutcome outcome) => outcome switch
     {

app/MindWork AI Studio/Assistants/ERI/ERIVersionExtensions.cs

@@ -2,14 +2,17 @@ namespace AIStudio.Assistants.ERI;
 
 public static class ERIVersionExtensions
 {
-    public static Task<string> ReadSpecification(this ERIVersion version, WebRootFiles webRootFiles) => webRootFiles.ReadTextAsync(version.SpecificationURL());
-
-    public static string SpecificationURL(this ERIVersion version)
+    extension(ERIVersion version)
     {
-        var nameLower = version.ToString().ToLowerInvariant();
-        var filename = $"{nameLower}.json";
-        return $"specs/eri/{filename}";
-    }
+        public Task<string> ReadSpecification(WebRootFiles webRootFiles) => webRootFiles.ReadTextAsync(version.SpecificationURL());
 
-    public static bool WasSpecificationSelected(this ERIVersion version) => version != ERIVersion.NONE;
+        public string SpecificationURL()
+        {
+            var nameLower = version.ToString().ToLowerInvariant();
+            var filename = $"{nameLower}.json";
+            return $"specs/eri/{filename}";
+        }
+
+        public bool WasSpecificationSelected() => version != ERIVersion.NONE;
+    }
 }

app/MindWork AI Studio/Assistants/ERI/OperatingSystemExtensions.cs

@@ -4,23 +4,26 @@ public static class OperatingSystemExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(OperatingSystemExtensions).Namespace, nameof(OperatingSystemExtensions));
     
-    public static string Name(this OperatingSystem os) => os switch
+    extension(OperatingSystem os)
     {
-        OperatingSystem.NONE => TB("No operating system specified"),
+        public string Name() => os switch
+        {
+            OperatingSystem.NONE => TB("No operating system specified"),
         
-        OperatingSystem.WINDOWS => TB("Windows"),
-        OperatingSystem.LINUX => TB("Linux"),
+            OperatingSystem.WINDOWS => TB("Windows"),
+            OperatingSystem.LINUX => TB("Linux"),
         
-        _ => TB("Unknown operating system")
-    };
-    
-    public static string ToPrompt(this OperatingSystem os) => os switch
-    {
-        OperatingSystem.NONE => "No operating system specified",
+            _ => TB("Unknown operating system")
+        };
+
+        public string ToPrompt() => os switch
+        {
+            OperatingSystem.NONE => "No operating system specified",
         
-        OperatingSystem.WINDOWS => "Windows",
-        OperatingSystem.LINUX => "Linux",
+            OperatingSystem.WINDOWS => "Windows",
+            OperatingSystem.LINUX => "Linux",
         
-        _ => "Unknown operating system"
-    };
+            _ => "Unknown operating system"
+        };
+    }
 }

app/MindWork AI Studio/Assistants/ERI/ProgrammingLanguagesExtensions.cs

@@ -4,43 +4,46 @@ public static class ProgrammingLanguagesExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(ProgrammingLanguagesExtensions).Namespace, nameof(ProgrammingLanguagesExtensions));
     
-    public static string Name(this ProgrammingLanguages language) => language switch
-    { 
-        ProgrammingLanguages.NONE => TB("No programming language selected"),
+    extension(ProgrammingLanguages language)
+    {
+        public string Name() => language switch
+        { 
+            ProgrammingLanguages.NONE => TB("No programming language selected"),
         
-        ProgrammingLanguages.C => "C",
-        ProgrammingLanguages.CPP => "C++",
-        ProgrammingLanguages.CSHARP => "C#",
-        ProgrammingLanguages.GO => "Go",
-        ProgrammingLanguages.JAVA => "Java",
-        ProgrammingLanguages.JAVASCRIPT => "JavaScript",
-        ProgrammingLanguages.JULIA => "Julia",
-        ProgrammingLanguages.MATLAB => "MATLAB",
-        ProgrammingLanguages.PHP => "PHP",
-        ProgrammingLanguages.PYTHON => "Python",
-        ProgrammingLanguages.RUST => "Rust",
+            ProgrammingLanguages.C => "C",
+            ProgrammingLanguages.CPP => "C++",
+            ProgrammingLanguages.CSHARP => "C#",
+            ProgrammingLanguages.GO => "Go",
+            ProgrammingLanguages.JAVA => "Java",
+            ProgrammingLanguages.JAVASCRIPT => "JavaScript",
+            ProgrammingLanguages.JULIA => "Julia",
+            ProgrammingLanguages.MATLAB => "MATLAB",
+            ProgrammingLanguages.PHP => "PHP",
+            ProgrammingLanguages.PYTHON => "Python",
+            ProgrammingLanguages.RUST => "Rust",
         
-        ProgrammingLanguages.OTHER => TB("Other"),
-        _ => TB("Unknown")
-    };
-    
-    public static string ToPrompt(this ProgrammingLanguages language) => language switch
-    { 
-        ProgrammingLanguages.NONE => "No programming language selected",
+            ProgrammingLanguages.OTHER => TB("Other"),
+            _ => TB("Unknown")
+        };
+
+        public string ToPrompt() => language switch
+        { 
+            ProgrammingLanguages.NONE => "No programming language selected",
         
-        ProgrammingLanguages.C => "C",
-        ProgrammingLanguages.CPP => "C++",
-        ProgrammingLanguages.CSHARP => "C#",
-        ProgrammingLanguages.GO => "Go",
-        ProgrammingLanguages.JAVA => "Java",
-        ProgrammingLanguages.JAVASCRIPT => "JavaScript",
-        ProgrammingLanguages.JULIA => "Julia",
-        ProgrammingLanguages.MATLAB => "MATLAB",
-        ProgrammingLanguages.PHP => "PHP",
-        ProgrammingLanguages.PYTHON => "Python",
-        ProgrammingLanguages.RUST => "Rust",
+            ProgrammingLanguages.C => "C",
+            ProgrammingLanguages.CPP => "C++",
+            ProgrammingLanguages.CSHARP => "C#",
+            ProgrammingLanguages.GO => "Go",
+            ProgrammingLanguages.JAVA => "Java",
+            ProgrammingLanguages.JAVASCRIPT => "JavaScript",
+            ProgrammingLanguages.JULIA => "Julia",
+            ProgrammingLanguages.MATLAB => "MATLAB",
+            ProgrammingLanguages.PHP => "PHP",
+            ProgrammingLanguages.PYTHON => "Python",
+            ProgrammingLanguages.RUST => "Rust",
         
-        ProgrammingLanguages.OTHER => "Other",
-        _ => "Unknown"
-    };
+            ProgrammingLanguages.OTHER => "Other",
+            _ => "Unknown"
+        };
+    }
 }

app/MindWork AI Studio/Assistants/IconFinder/IconSourceExtensions.cs

@@ -2,39 +2,42 @@ namespace AIStudio.Assistants.IconFinder;
 
 public static class IconSourceExtensions
 {
-    public static string Name(this IconSources iconSource) => iconSource switch
+    extension(IconSources iconSource)
     {
-        IconSources.FLAT_ICON => "Flaticon",
-        IconSources.FONT_AWESOME => "Font Awesome",
-        IconSources.MATERIAL_ICONS => "Material Icons",
-        IconSources.FEATHER_ICONS => "Feather Icons",
-        IconSources.BOOTSTRAP_ICONS => "Bootstrap Icons",
-        IconSources.ICONS8 => "Icons8",
+        public string Name() => iconSource switch
+        {
+            IconSources.FLAT_ICON => "Flaticon",
+            IconSources.FONT_AWESOME => "Font Awesome",
+            IconSources.MATERIAL_ICONS => "Material Icons",
+            IconSources.FEATHER_ICONS => "Feather Icons",
+            IconSources.BOOTSTRAP_ICONS => "Bootstrap Icons",
+            IconSources.ICONS8 => "Icons8",
             
-        _ => "Generic",
-    };
-    
-    public static string Prompt(this IconSources iconSource) => iconSource switch
-    {
-        IconSources.FLAT_ICON => "My icon source is Flaticon.",
-        IconSources.FONT_AWESOME => "I look for an icon on Font Awesome. Please provide just valid icon names. Valid icon names are using the format `fa-icon-name`.",
-        IconSources.MATERIAL_ICONS => "I look for a Material icon. Please provide just valid icon names. Valid icon names are using the format `IconName`.",
-        IconSources.FEATHER_ICONS => "My icon source is Feather Icons. Please provide just valid icon names. Valid icon names usiing the format `icon-name`.",
-        IconSources.BOOTSTRAP_ICONS => "I look for an icon for Bootstrap. Please provide just valid icon names. Valid icon names are using the format `bi-icon-name`.",
-        IconSources.ICONS8 => "I look for an icon on Icons8.",
-            
-        _ => string.Empty,
-    };
+            _ => "Generic",
+        };
 
-    public static string URL(this IconSources iconSource) => iconSource switch
-    {
-        IconSources.FLAT_ICON => "https://www.flaticon.com/",
-        IconSources.FONT_AWESOME => "https://fontawesome.com/",
-        IconSources.MATERIAL_ICONS => "https://material.io/resources/icons/",
-        IconSources.FEATHER_ICONS => "https://feathericons.com/",
-        IconSources.BOOTSTRAP_ICONS => "https://icons.getbootstrap.com/",
-        IconSources.ICONS8 => "https://icons8.com/",
+        public string Prompt() => iconSource switch
+        {
+            IconSources.FLAT_ICON => "My icon source is Flaticon.",
+            IconSources.FONT_AWESOME => "I look for an icon on Font Awesome. Please provide just valid icon names. Valid icon names are using the format `fa-icon-name`.",
+            IconSources.MATERIAL_ICONS => "I look for a Material icon. Please provide just valid icon names. Valid icon names are using the format `IconName`.",
+            IconSources.FEATHER_ICONS => "My icon source is Feather Icons. Please provide just valid icon names. Valid icon names usiing the format `icon-name`.",
+            IconSources.BOOTSTRAP_ICONS => "I look for an icon for Bootstrap. Please provide just valid icon names. Valid icon names are using the format `bi-icon-name`.",
+            IconSources.ICONS8 => "I look for an icon on Icons8.",
             
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+
+        public string URL() => iconSource switch
+        {
+            IconSources.FLAT_ICON => "https://www.flaticon.com/",
+            IconSources.FONT_AWESOME => "https://fontawesome.com/",
+            IconSources.MATERIAL_ICONS => "https://material.io/resources/icons/",
+            IconSources.FEATHER_ICONS => "https://feathericons.com/",
+            IconSources.BOOTSTRAP_ICONS => "https://icons.getbootstrap.com/",
+            IconSources.ICONS8 => "https://icons8.com/",
+            
+            _ => string.Empty,
+        };
+    }
 }

app/MindWork AI Studio/Assistants/RewriteImprove/SentenceStructureExtensions.cs

@@ -4,19 +4,22 @@ public static class SentenceStructureExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(SentenceStructureExtensions).Namespace, nameof(SentenceStructureExtensions));
     
-    public static string Name(this SentenceStructure sentenceStructure) => sentenceStructure switch
+    extension(SentenceStructure sentenceStructure)
     {
-        SentenceStructure.ACTIVE => TB("Active voice"),
-        SentenceStructure.PASSIVE => TB("Passive voice"),
+        public string Name() => sentenceStructure switch
+        {
+            SentenceStructure.ACTIVE => TB("Active voice"),
+            SentenceStructure.PASSIVE => TB("Passive voice"),
         
-        _ => TB("Not Specified"),
-    };
+            _ => TB("Not Specified"),
+        };
 
-    public static string Prompt(this SentenceStructure sentenceStructure) => sentenceStructure switch
-    {
-        SentenceStructure.ACTIVE => " Use an active voice for the sentence structure.",
-        SentenceStructure.PASSIVE => " Use a passive voice for the sentence structure.",
+        public string Prompt() => sentenceStructure switch
+        {
+            SentenceStructure.ACTIVE => " Use an active voice for the sentence structure.",
+            SentenceStructure.PASSIVE => " Use a passive voice for the sentence structure.",
         
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+    }
 }

app/MindWork AI Studio/Assistants/RewriteImprove/WritingStylesExtensions.cs

@@ -4,35 +4,38 @@ public static class WritingStylesExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(WritingStylesExtensions).Namespace, nameof(WritingStylesExtensions));
     
-    public static string Name(this WritingStyles style) => style switch
+    extension(WritingStyles style)
     {
-        WritingStyles.EVERYDAY => TB("Everyday (personal texts, social media)"),
-        WritingStyles.BUSINESS => TB("Business (business emails, reports, presentations)"),
-        WritingStyles.SCIENTIFIC => TB("Scientific (scientific papers, research reports)"),
-        WritingStyles.JOURNALISTIC => TB("Journalistic (magazines, newspapers, news)"),
-        WritingStyles.LITERARY => TB("Literary (fiction, poetry)"),
-        WritingStyles.TECHNICAL => TB("Technical (manuals, documentation)"),
-        WritingStyles.MARKETING => TB("Marketing (advertisements, sales texts)"),
-        WritingStyles.ACADEMIC => TB("Academic (essays, seminar papers)"),
-        WritingStyles.LEGAL => TB("Legal (legal texts, contracts)"),
-        WritingStyles.CHANGELOG => TB("Changelog (release notes, version history)"),
+        public string Name() => style switch
+        {
+            WritingStyles.EVERYDAY => TB("Everyday (personal texts, social media)"),
+            WritingStyles.BUSINESS => TB("Business (business emails, reports, presentations)"),
+            WritingStyles.SCIENTIFIC => TB("Scientific (scientific papers, research reports)"),
+            WritingStyles.JOURNALISTIC => TB("Journalistic (magazines, newspapers, news)"),
+            WritingStyles.LITERARY => TB("Literary (fiction, poetry)"),
+            WritingStyles.TECHNICAL => TB("Technical (manuals, documentation)"),
+            WritingStyles.MARKETING => TB("Marketing (advertisements, sales texts)"),
+            WritingStyles.ACADEMIC => TB("Academic (essays, seminar papers)"),
+            WritingStyles.LEGAL => TB("Legal (legal texts, contracts)"),
+            WritingStyles.CHANGELOG => TB("Changelog (release notes, version history)"),
         
-        _ => TB("Not specified"),
-    };
+            _ => TB("Not specified"),
+        };
 
-    public static string Prompt(this WritingStyles style) => style switch
-    {
-        WritingStyles.EVERYDAY => "Use a everyday style like for personal texts, social media, and informal communication.",
-        WritingStyles.BUSINESS => "Use a business style like for business emails, reports, and presentations. Most important is clarity and professionalism.",
-        WritingStyles.SCIENTIFIC => "Use a scientific style like for scientific papers, research reports, and academic writing. Most important is precision and objectivity.",
-        WritingStyles.JOURNALISTIC => "Use a journalistic style like for magazines, newspapers, and news. Most important is readability and engaging content.",
-        WritingStyles.LITERARY => "Use a literary style like for fiction, poetry, and creative writing. Most important is creativity and emotional impact.",
-        WritingStyles.TECHNICAL => "Use a technical style like for manuals, documentation, and technical writing. Most important is clarity and precision.",
-        WritingStyles.MARKETING => "Use a marketing style like for advertisements, sales texts, and promotional content. Most important is persuasiveness and engagement.",
-        WritingStyles.ACADEMIC => "Use a academic style like for essays, seminar papers, and academic writing. Most important is clarity and objectivity.",
-        WritingStyles.LEGAL => "Use a legal style like for legal texts, contracts, and official documents. Most important is precision and legal correctness. Use formal legal language.",
-        WritingStyles.CHANGELOG => "Use a changelog style like for release notes, version history, and software updates. Most important is clarity and conciseness. The changelog is structured as a Markdown list. Most list items start with one of the following verbs: Added, Changed, Deprecated, Removed, Fixed, Refactored, Improved, or Upgraded -- these verbs should also translated to the target language. Also, changelogs use past tense.",
+        public string Prompt() => style switch
+        {
+            WritingStyles.EVERYDAY => "Use a everyday style like for personal texts, social media, and informal communication.",
+            WritingStyles.BUSINESS => "Use a business style like for business emails, reports, and presentations. Most important is clarity and professionalism.",
+            WritingStyles.SCIENTIFIC => "Use a scientific style like for scientific papers, research reports, and academic writing. Most important is precision and objectivity.",
+            WritingStyles.JOURNALISTIC => "Use a journalistic style like for magazines, newspapers, and news. Most important is readability and engaging content.",
+            WritingStyles.LITERARY => "Use a literary style like for fiction, poetry, and creative writing. Most important is creativity and emotional impact.",
+            WritingStyles.TECHNICAL => "Use a technical style like for manuals, documentation, and technical writing. Most important is clarity and precision.",
+            WritingStyles.MARKETING => "Use a marketing style like for advertisements, sales texts, and promotional content. Most important is persuasiveness and engagement.",
+            WritingStyles.ACADEMIC => "Use a academic style like for essays, seminar papers, and academic writing. Most important is clarity and objectivity.",
+            WritingStyles.LEGAL => "Use a legal style like for legal texts, contracts, and official documents. Most important is precision and legal correctness. Use formal legal language.",
+            WritingStyles.CHANGELOG => "Use a changelog style like for release notes, version history, and software updates. Most important is clarity and conciseness. The changelog is structured as a Markdown list. Most list items start with one of the following verbs: Added, Changed, Deprecated, Removed, Fixed, Refactored, Improved, or Upgraded -- these verbs should also translated to the target language. Also, changelogs use past tense.",
         
-        _ => "Keep the style of the text as it is.",
-    };
+            _ => "Keep the style of the text as it is.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SWOTAnalysis/SwotAnalysisCategoryExtensions.cs

@@ -2,29 +2,32 @@ namespace AIStudio.Assistants.SWOTAnalysis;
 
 internal static class SwotAnalysisCategoryExtensions
 {
-    /// <summary>
-    /// The name of the category in the JSON the models read and write, e.g., "strengths".
-    /// </summary>
-    public static string JsonName(this SwotAnalysisCategory category) => category switch
+    extension(SwotAnalysisCategory category)
     {
-        SwotAnalysisCategory.STRENGTHS => "strengths",
-        SwotAnalysisCategory.WEAKNESSES => "weaknesses",
-        SwotAnalysisCategory.OPPORTUNITIES => "opportunities",
-        SwotAnalysisCategory.THREATS => "threats",
+        /// <summary>
+        /// The name of the category in the JSON the models read and write, e.g., "strengths".
+        /// </summary>
+        public string JsonName() => category switch
+        {
+            SwotAnalysisCategory.STRENGTHS => "strengths",
+            SwotAnalysisCategory.WEAKNESSES => "weaknesses",
+            SwotAnalysisCategory.OPPORTUNITIES => "opportunities",
+            SwotAnalysisCategory.THREATS => "threats",
 
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
 
-    /// <summary>
-    /// The letter the factor IDs of the category start with, e.g., S1 for the first strength.
-    /// </summary>
-    public static string FactorIdPrefix(this SwotAnalysisCategory category) => category switch
-    {
-        SwotAnalysisCategory.STRENGTHS => "S",
-        SwotAnalysisCategory.WEAKNESSES => "W",
-        SwotAnalysisCategory.OPPORTUNITIES => "O",
-        SwotAnalysisCategory.THREATS => "T",
+        /// <summary>
+        /// The letter the factor IDs of the category start with, e.g., S1 for the first strength.
+        /// </summary>
+        public string FactorIdPrefix() => category switch
+        {
+            SwotAnalysisCategory.STRENGTHS => "S",
+            SwotAnalysisCategory.WEAKNESSES => "W",
+            SwotAnalysisCategory.OPPORTUNITIES => "O",
+            SwotAnalysisCategory.THREATS => "T",
 
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/AudienceAgeGroupExtensions.cs

@@ -4,23 +4,26 @@ public static class AudienceAgeGroupExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AudienceAgeGroupExtensions).Namespace, nameof(AudienceAgeGroupExtensions));
 
-    public static string Name(this AudienceAgeGroup ageGroup) => ageGroup switch
+    extension(AudienceAgeGroup ageGroup)
     {
-        AudienceAgeGroup.UNSPECIFIED => TB("Unspecified age group"),
-        AudienceAgeGroup.CHILDREN => TB("Children"),
-        AudienceAgeGroup.TEENAGERS => TB("Teenagers"),
-        AudienceAgeGroup.ADULTS => TB("Adults"),
+        public string Name() => ageGroup switch
+        {
+            AudienceAgeGroup.UNSPECIFIED => TB("Unspecified age group"),
+            AudienceAgeGroup.CHILDREN => TB("Children"),
+            AudienceAgeGroup.TEENAGERS => TB("Teenagers"),
+            AudienceAgeGroup.ADULTS => TB("Adults"),
         
-        _ => TB("Unspecified age group"),
-    };
+            _ => TB("Unspecified age group"),
+        };
 
-    public static string Prompt(this AudienceAgeGroup ageGroup) => ageGroup switch
-    {
-        AudienceAgeGroup.UNSPECIFIED => "Do not tailor the text to a specific age group.",
-        AudienceAgeGroup.CHILDREN => "Use simple, concrete language with short sentences and minimal jargon.",
-        AudienceAgeGroup.TEENAGERS => "Use clear, approachable language with relatable examples and limited jargon.",
-        AudienceAgeGroup.ADULTS => "Use adult-appropriate language with clear structure and direct explanations.",
+        public string Prompt() => ageGroup switch
+        {
+            AudienceAgeGroup.UNSPECIFIED => "Do not tailor the text to a specific age group.",
+            AudienceAgeGroup.CHILDREN => "Use simple, concrete language with short sentences and minimal jargon.",
+            AudienceAgeGroup.TEENAGERS => "Use clear, approachable language with relatable examples and limited jargon.",
+            AudienceAgeGroup.ADULTS => "Use adult-appropriate language with clear structure and direct explanations.",
         
-        _ => "Do not tailor the text to a specific age group.",
-    };
+            _ => "Do not tailor the text to a specific age group.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/AudienceExpertiseExtensions.cs

@@ -4,25 +4,28 @@ public static class AudienceExpertiseExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AudienceExpertiseExtensions).Namespace, nameof(AudienceExpertiseExtensions));
 
-    public static string Name(this AudienceExpertise expertise) => expertise switch
+    extension(AudienceExpertise expertise)
     {
-        AudienceExpertise.UNSPECIFIED => TB("Unspecified expertise"),
-        AudienceExpertise.NON_EXPERTS => TB("No expertise"),
-        AudienceExpertise.BASIC => TB("Basic expertise"),
-        AudienceExpertise.INTERMEDIATE => TB("Intermediate expertise"),
-        AudienceExpertise.EXPERTS => TB("Experts"),
+        public string Name() => expertise switch
+        {
+            AudienceExpertise.UNSPECIFIED => TB("Unspecified expertise"),
+            AudienceExpertise.NON_EXPERTS => TB("No expertise"),
+            AudienceExpertise.BASIC => TB("Basic expertise"),
+            AudienceExpertise.INTERMEDIATE => TB("Intermediate expertise"),
+            AudienceExpertise.EXPERTS => TB("Experts"),
         
-        _ => TB("Unspecified expertise"),
-    };
+            _ => TB("Unspecified expertise"),
+        };
 
-    public static string Prompt(this AudienceExpertise expertise) => expertise switch
-    {
-        AudienceExpertise.UNSPECIFIED => "Do not tailor the text to a specific expertise level.",
-        AudienceExpertise.NON_EXPERTS => "Avoid jargon and explain specialized concepts plainly.",
-        AudienceExpertise.BASIC => "Use simple terminology and briefly explain important technical terms.",
-        AudienceExpertise.INTERMEDIATE => "Assume some familiarity with the topic, but still explain important details clearly.",
-        AudienceExpertise.EXPERTS => "Assume deep familiarity with the topic and use precise domain-specific terminology.",
+        public string Prompt() => expertise switch
+        {
+            AudienceExpertise.UNSPECIFIED => "Do not tailor the text to a specific expertise level.",
+            AudienceExpertise.NON_EXPERTS => "Avoid jargon and explain specialized concepts plainly.",
+            AudienceExpertise.BASIC => "Use simple terminology and briefly explain important technical terms.",
+            AudienceExpertise.INTERMEDIATE => "Assume some familiarity with the topic, but still explain important details clearly.",
+            AudienceExpertise.EXPERTS => "Assume deep familiarity with the topic and use precise domain-specific terminology.",
         
-        _ => "Do not tailor the text to a specific expertise level.",
-    };
+            _ => "Do not tailor the text to a specific expertise level.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/AudienceOrganizationalLevelExtensions.cs

@@ -4,29 +4,32 @@ public static class AudienceOrganizationalLevelExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AudienceOrganizationalLevelExtensions).Namespace, nameof(AudienceOrganizationalLevelExtensions));
 
-    public static string Name(this AudienceOrganizationalLevel level) => level switch
+    extension(AudienceOrganizationalLevel level)
     {
-        AudienceOrganizationalLevel.UNSPECIFIED => TB("Unspecified organizational level"),
-        AudienceOrganizationalLevel.TRAINEES => TB("Trainees"),
-        AudienceOrganizationalLevel.INDIVIDUAL_CONTRIBUTORS => TB("Individual contributors"),
-        AudienceOrganizationalLevel.TEAM_LEADS => TB("Team leads"),
-        AudienceOrganizationalLevel.MANAGERS => TB("Managers"),
-        AudienceOrganizationalLevel.EXECUTIVES => TB("Executives"),
-        AudienceOrganizationalLevel.BOARD_MEMBERS => TB("Board members"),
+        public string Name() => level switch
+        {
+            AudienceOrganizationalLevel.UNSPECIFIED => TB("Unspecified organizational level"),
+            AudienceOrganizationalLevel.TRAINEES => TB("Trainees"),
+            AudienceOrganizationalLevel.INDIVIDUAL_CONTRIBUTORS => TB("Individual contributors"),
+            AudienceOrganizationalLevel.TEAM_LEADS => TB("Team leads"),
+            AudienceOrganizationalLevel.MANAGERS => TB("Managers"),
+            AudienceOrganizationalLevel.EXECUTIVES => TB("Executives"),
+            AudienceOrganizationalLevel.BOARD_MEMBERS => TB("Board members"),
         
-        _ => TB("Unspecified organizational level"),
-    };
+            _ => TB("Unspecified organizational level"),
+        };
 
-    public static string Prompt(this AudienceOrganizationalLevel level) => level switch
-    {
-        AudienceOrganizationalLevel.UNSPECIFIED => "Do not tailor the text to a specific organizational level.",
-        AudienceOrganizationalLevel.TRAINEES => "Keep the content supportive and introductory. Explain context and avoid assuming prior organizational knowledge.",
-        AudienceOrganizationalLevel.INDIVIDUAL_CONTRIBUTORS => "Focus on execution, clarity, responsibilities, and practical next steps.",
-        AudienceOrganizationalLevel.TEAM_LEADS => "Focus on coordination, tradeoffs, risks, and concrete actions for a small team.",
-        AudienceOrganizationalLevel.MANAGERS => "Focus on planning, priorities, outcomes, risks, and resource implications.",
-        AudienceOrganizationalLevel.EXECUTIVES => "Focus on strategy, business impact, risks, and the decisions required.",
-        AudienceOrganizationalLevel.BOARD_MEMBERS => "Provide a concise executive-level summary with governance, strategy, risk, and decision relevance.",
+        public string Prompt() => level switch
+        {
+            AudienceOrganizationalLevel.UNSPECIFIED => "Do not tailor the text to a specific organizational level.",
+            AudienceOrganizationalLevel.TRAINEES => "Keep the content supportive and introductory. Explain context and avoid assuming prior organizational knowledge.",
+            AudienceOrganizationalLevel.INDIVIDUAL_CONTRIBUTORS => "Focus on execution, clarity, responsibilities, and practical next steps.",
+            AudienceOrganizationalLevel.TEAM_LEADS => "Focus on coordination, tradeoffs, risks, and concrete actions for a small team.",
+            AudienceOrganizationalLevel.MANAGERS => "Focus on planning, priorities, outcomes, risks, and resource implications.",
+            AudienceOrganizationalLevel.EXECUTIVES => "Focus on strategy, business impact, risks, and the decisions required.",
+            AudienceOrganizationalLevel.BOARD_MEMBERS => "Provide a concise executive-level summary with governance, strategy, risk, and decision relevance.",
         
-        _ => "Do not tailor the text to a specific organizational level.",
-    };
+            _ => "Do not tailor the text to a specific organizational level.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/AudienceProfileExtensions.cs

@@ -4,37 +4,40 @@ public static class AudienceProfileExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(AudienceProfileExtensions).Namespace, nameof(AudienceProfileExtensions));
 
-    public static string Name(this AudienceProfile profile) => profile switch
+    extension(AudienceProfile profile)
     {
-        AudienceProfile.UNSPECIFIED => TB("Unspecified audience profile"),
-        AudienceProfile.STUDENTS => TB("Students"),
-        AudienceProfile.SCIENTISTS => TB("Scientists"),
-        AudienceProfile.LAWYERS => TB("Lawyers"),
-        AudienceProfile.INVESTORS => TB("Investors"),
-        AudienceProfile.ENGINEERS => TB("Engineers"),
-        AudienceProfile.SOFTWARE_DEVELOPERS => TB("Software developers"),
-        AudienceProfile.JOURNALISTS => TB("Journalists"),
-        AudienceProfile.HEALTHCARE_PROFESSIONALS => TB("Healthcare professionals"),
-        AudienceProfile.PUBLIC_OFFICIALS => TB("Public officials"),
-        AudienceProfile.BUSINESS_PROFESSIONALS => TB("Business professionals"),
+        public string Name() => profile switch
+        {
+            AudienceProfile.UNSPECIFIED => TB("Unspecified audience profile"),
+            AudienceProfile.STUDENTS => TB("Students"),
+            AudienceProfile.SCIENTISTS => TB("Scientists"),
+            AudienceProfile.LAWYERS => TB("Lawyers"),
+            AudienceProfile.INVESTORS => TB("Investors"),
+            AudienceProfile.ENGINEERS => TB("Engineers"),
+            AudienceProfile.SOFTWARE_DEVELOPERS => TB("Software developers"),
+            AudienceProfile.JOURNALISTS => TB("Journalists"),
+            AudienceProfile.HEALTHCARE_PROFESSIONALS => TB("Healthcare professionals"),
+            AudienceProfile.PUBLIC_OFFICIALS => TB("Public officials"),
+            AudienceProfile.BUSINESS_PROFESSIONALS => TB("Business professionals"),
         
-        _ => TB("Unspecified audience profile"),
-    };
+            _ => TB("Unspecified audience profile"),
+        };
 
-    public static string Prompt(this AudienceProfile profile) => profile switch
-    {
-        AudienceProfile.UNSPECIFIED => "Do not tailor the text to a specific audience profile.",
-        AudienceProfile.STUDENTS => "Write for students. Keep it structured, easy to study, and focused on key takeaways.",
-        AudienceProfile.SCIENTISTS => "Use precise, technical language. Structure the content logically and focus on methods, evidence, and results.",
-        AudienceProfile.LAWYERS => "Write with precise wording. Emphasize definitions, implications, compliance, and risks.",
-        AudienceProfile.INVESTORS => "Focus on market potential, business model, differentiation, traction, risks, and financial upside.",
-        AudienceProfile.ENGINEERS => "Be technically precise and practical. Focus on systems, constraints, implementation, and tradeoffs.",
-        AudienceProfile.SOFTWARE_DEVELOPERS => "Use concise technical language. Focus on architecture, implementation details, tradeoffs, and maintainability.",
-        AudienceProfile.JOURNALISTS => "Be clear, factual, and concise. Highlight the most newsworthy points and explain relevance plainly.",
-        AudienceProfile.HEALTHCARE_PROFESSIONALS => "Use accurate professional language. Emphasize outcomes, safety, evidence, and practical implications.",
-        AudienceProfile.PUBLIC_OFFICIALS => "Focus on public impact, feasibility, budget, compliance, risks, and implementation in a neutral institutional tone.",
-        AudienceProfile.BUSINESS_PROFESSIONALS => "Be clear, practical, and concise. Focus on business relevance, decisions, and next steps.",
+        public string Prompt() => profile switch
+        {
+            AudienceProfile.UNSPECIFIED => "Do not tailor the text to a specific audience profile.",
+            AudienceProfile.STUDENTS => "Write for students. Keep it structured, easy to study, and focused on key takeaways.",
+            AudienceProfile.SCIENTISTS => "Use precise, technical language. Structure the content logically and focus on methods, evidence, and results.",
+            AudienceProfile.LAWYERS => "Write with precise wording. Emphasize definitions, implications, compliance, and risks.",
+            AudienceProfile.INVESTORS => "Focus on market potential, business model, differentiation, traction, risks, and financial upside.",
+            AudienceProfile.ENGINEERS => "Be technically precise and practical. Focus on systems, constraints, implementation, and tradeoffs.",
+            AudienceProfile.SOFTWARE_DEVELOPERS => "Use concise technical language. Focus on architecture, implementation details, tradeoffs, and maintainability.",
+            AudienceProfile.JOURNALISTS => "Be clear, factual, and concise. Highlight the most newsworthy points and explain relevance plainly.",
+            AudienceProfile.HEALTHCARE_PROFESSIONALS => "Use accurate professional language. Emphasize outcomes, safety, evidence, and practical implications.",
+            AudienceProfile.PUBLIC_OFFICIALS => "Focus on public impact, feasibility, budget, compliance, risks, and implementation in a neutral institutional tone.",
+            AudienceProfile.BUSINESS_PROFESSIONALS => "Be clear, practical, and concise. Focus on business relevance, decisions, and next steps.",
         
-        _ => "Do not tailor the text to a specific audience profile.",
-    };
+            _ => "Do not tailor the text to a specific audience profile.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/PresentationOccasionExtensions.cs

@@ -4,53 +4,56 @@ public static class PresentationOccasionExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(PresentationOccasionExtensions).Namespace, nameof(PresentationOccasionExtensions));
 
-    public static string Name(this PresentationOccasion occasion) => occasion switch
-    {
-        PresentationOccasion.UNSPECIFIED => TB("Unspecified occasion"),
-        PresentationOccasion.TALK => TB("Talk"),
-        PresentationOccasion.KEYNOTE => TB("Keynote"),
-        PresentationOccasion.CONFERENCE_TALK => TB("Conference talk"),
-        PresentationOccasion.LECTURE => TB("Lecture"),
-        PresentationOccasion.TRAINING => TB("Training"),
-        PresentationOccasion.WORKSHOP => TB("Workshop of one day"),
-        PresentationOccasion.MULTI_DAY_WORKSHOP => TB("Workshop of several days"),
-        PresentationOccasion.THESIS_DEFENSE => TB("Defense of a thesis or dissertation"),
-        PresentationOccasion.RESEARCH_RESULTS => TB("Presentation of research results"),
-        PresentationOccasion.PROJECT_REPORT => TB("Project or status report"),
-        PresentationOccasion.MANAGEMENT_REPORT => TB("Report to management"),
-        PresentationOccasion.PITCH => TB("Pitch"),
-        PresentationOccasion.PRODUCT_PRESENTATION => TB("Product presentation"),
-        PresentationOccasion.KICK_OFF => TB("Kick-off"),
-        PresentationOccasion.TEAM_MEETING => TB("Team meeting"),
-        PresentationOccasion.OTHER => TB("Other occasion"),
-
-        _ => TB("Unspecified occasion"),
-    };
-
-    /// <summary>
-    /// Tells the model what the occasion means for the structure of the presentation.
-    /// </summary>
     /// <param name="occasion">The occasion.</param>
-    /// <param name="customOccasion">The occasion the user described, for OTHER.</param>
-    public static string Prompt(this PresentationOccasion occasion, string customOccasion) => occasion switch
+    extension(PresentationOccasion occasion)
     {
-        PresentationOccasion.TALK => "The presentation accompanies a talk. Structure it for a speaker who talks the audience through it.",
-        PresentationOccasion.KEYNOTE => "The presentation accompanies a keynote. Favor few words per slide, strong key messages, and a story which carries the audience.",
-        PresentationOccasion.CONFERENCE_TALK => "The presentation accompanies a talk at a conference. Keep to the essentials of a short time slot, and end with the key messages and room for questions.",
-        PresentationOccasion.LECTURE => "The presentation accompanies a lecture. Teach step by step, with examples, and where it suits, end chapters with an interim summary or with room for questions.",
-        PresentationOccasion.TRAINING => "The presentation accompanies a training. Teach practical skills step by step, with examples and exercises where the content offers them.",
-        PresentationOccasion.WORKSHOP => "The presentation accompanies a workshop of one day. Plan for interaction, e.g., exercises, group work, or discussions, and for the breaks the schedule of the content has.",
-        PresentationOccasion.MULTI_DAY_WORKSHOP => "The presentation accompanies a workshop of several days. Plan for interaction, mark where a day ends and the next one starts, and look back at the start of each day, following the schedule of the content.",
-        PresentationOccasion.THESIS_DEFENSE => "The presentation defends a thesis or a dissertation before a committee. Present the research questions, the method, the results, and the contribution precisely, and anticipate critical questions.",
-        PresentationOccasion.RESEARCH_RESULTS => "The presentation presents research results. Present the questions, the method, the results, and their meaning precisely and comprehensibly.",
-        PresentationOccasion.PROJECT_REPORT => "The presentation reports on a project. Present the status, the progress, the problems, and the next steps clearly.",
-        PresentationOccasion.MANAGEMENT_REPORT => "The presentation reports to management and may prepare a decision. Lead with the key messages, keep details short, and state clearly what is to be decided.",
-        PresentationOccasion.PITCH => "The presentation pitches an idea, a product, or an offer. Lead with the benefit for the audience, and end with a clear call to action.",
-        PresentationOccasion.PRODUCT_PRESENTATION => "The presentation presents a product. Show what it does and what it brings the audience, with examples.",
-        PresentationOccasion.KICK_OFF => "The presentation opens a project at its kick-off. Present the goals, the team, the plan, and how the work is organized.",
-        PresentationOccasion.TEAM_MEETING => "The presentation serves a team meeting. Keep it short and practical, with clear points and next steps.",
-        PresentationOccasion.OTHER => $"The presentation is for this occasion: {customOccasion}. Structure it accordingly.",
+        public string Name() => occasion switch
+        {
+            PresentationOccasion.UNSPECIFIED => TB("Unspecified occasion"),
+            PresentationOccasion.TALK => TB("Talk"),
+            PresentationOccasion.KEYNOTE => TB("Keynote"),
+            PresentationOccasion.CONFERENCE_TALK => TB("Conference talk"),
+            PresentationOccasion.LECTURE => TB("Lecture"),
+            PresentationOccasion.TRAINING => TB("Training"),
+            PresentationOccasion.WORKSHOP => TB("Workshop of one day"),
+            PresentationOccasion.MULTI_DAY_WORKSHOP => TB("Workshop of several days"),
+            PresentationOccasion.THESIS_DEFENSE => TB("Defense of a thesis or dissertation"),
+            PresentationOccasion.RESEARCH_RESULTS => TB("Presentation of research results"),
+            PresentationOccasion.PROJECT_REPORT => TB("Project or status report"),
+            PresentationOccasion.MANAGEMENT_REPORT => TB("Report to management"),
+            PresentationOccasion.PITCH => TB("Pitch"),
+            PresentationOccasion.PRODUCT_PRESENTATION => TB("Product presentation"),
+            PresentationOccasion.KICK_OFF => TB("Kick-off"),
+            PresentationOccasion.TEAM_MEETING => TB("Team meeting"),
+            PresentationOccasion.OTHER => TB("Other occasion"),
 
-        _ => "No particular occasion is given. Structure the presentation by its content.",
-    };
+            _ => TB("Unspecified occasion"),
+        };
+
+        /// <summary>
+        /// Tells the model what the occasion means for the structure of the presentation.
+        /// </summary>
+        /// <param name="customOccasion">The occasion the user described, for OTHER.</param>
+        public string Prompt(string customOccasion) => occasion switch
+        {
+            PresentationOccasion.TALK => "The presentation accompanies a talk. Structure it for a speaker who talks the audience through it.",
+            PresentationOccasion.KEYNOTE => "The presentation accompanies a keynote. Favor few words per slide, strong key messages, and a story which carries the audience.",
+            PresentationOccasion.CONFERENCE_TALK => "The presentation accompanies a talk at a conference. Keep to the essentials of a short time slot, and end with the key messages and room for questions.",
+            PresentationOccasion.LECTURE => "The presentation accompanies a lecture. Teach step by step, with examples, and where it suits, end chapters with an interim summary or with room for questions.",
+            PresentationOccasion.TRAINING => "The presentation accompanies a training. Teach practical skills step by step, with examples and exercises where the content offers them.",
+            PresentationOccasion.WORKSHOP => "The presentation accompanies a workshop of one day. Plan for interaction, e.g., exercises, group work, or discussions, and for the breaks the schedule of the content has.",
+            PresentationOccasion.MULTI_DAY_WORKSHOP => "The presentation accompanies a workshop of several days. Plan for interaction, mark where a day ends and the next one starts, and look back at the start of each day, following the schedule of the content.",
+            PresentationOccasion.THESIS_DEFENSE => "The presentation defends a thesis or a dissertation before a committee. Present the research questions, the method, the results, and the contribution precisely, and anticipate critical questions.",
+            PresentationOccasion.RESEARCH_RESULTS => "The presentation presents research results. Present the questions, the method, the results, and their meaning precisely and comprehensibly.",
+            PresentationOccasion.PROJECT_REPORT => "The presentation reports on a project. Present the status, the progress, the problems, and the next steps clearly.",
+            PresentationOccasion.MANAGEMENT_REPORT => "The presentation reports to management and may prepare a decision. Lead with the key messages, keep details short, and state clearly what is to be decided.",
+            PresentationOccasion.PITCH => "The presentation pitches an idea, a product, or an offer. Lead with the benefit for the audience, and end with a clear call to action.",
+            PresentationOccasion.PRODUCT_PRESENTATION => "The presentation presents a product. Show what it does and what it brings the audience, with examples.",
+            PresentationOccasion.KICK_OFF => "The presentation opens a project at its kick-off. Present the goals, the team, the plan, and how the work is organized.",
+            PresentationOccasion.TEAM_MEETING => "The presentation serves a team meeting. Keep it short and practical, with clear points and next steps.",
+            PresentationOccasion.OTHER => $"The presentation is for this occasion: {customOccasion}. Structure it accordingly.",
+
+            _ => "No particular occasion is given. Structure the presentation by its content.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/TemplateSlideExtensions.cs

@@ -11,20 +11,23 @@ internal static class TemplateSlideExtensions
     /// </summary>
     private const int MAX_SLIDE_TITLE_CHARACTERS = 60;
 
-    /// <summary>
-    /// How the forms name a slide of the template: by its number and its title, and what is special about it.
-    /// </summary>
-    /// <remarks>
-    /// The title tells the slides apart at a glance, since a template rarely gives its slides more
-    /// than a title. A long one is cut, so that the label stays on one line.
-    /// </remarks>
-    public static string Label(this TemplateSlide slide)
+    extension(TemplateSlide slide)
     {
-        var title = slide.Title.Length > MAX_SLIDE_TITLE_CHARACTERS ? $"{slide.Title[..MAX_SLIDE_TITLE_CHARACTERS].TrimEnd()}…" : slide.Title;
-        var label = title.Length > 0 ? string.Format(TB("Slide {0}: {1}"), slide.Number, title) : string.Format(TB("Slide {0}"), slide.Number);
-        if (slide.IsHidden)
-            label = $"{label} ({TB("hidden")})";
+        /// <summary>
+        /// How the forms name a slide of the template: by its number and its title, and what is special about it.
+        /// </summary>
+        /// <remarks>
+        /// The title tells the slides apart at a glance, since a template rarely gives its slides more
+        /// than a title. A long one is cut, so that the label stays on one line.
+        /// </remarks>
+        public string Label()
+        {
+            var title = slide.Title.Length > MAX_SLIDE_TITLE_CHARACTERS ? $"{slide.Title[..MAX_SLIDE_TITLE_CHARACTERS].TrimEnd()}…" : slide.Title;
+            var label = title.Length > 0 ? string.Format(TB("Slide {0}: {1}"), slide.Number, title) : string.Format(TB("Slide {0}"), slide.Number);
+            if (slide.IsHidden)
+                label = $"{label} ({TB("hidden")})";
 
-        return label;
+            return label;
+        }
     }
 }

app/MindWork AI Studio/Assistants/SlideBuilder/TemplateSlideUseExtensions.cs

@@ -6,12 +6,15 @@ internal static class TemplateSlideUseExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(TemplateSlideUseExtensions).Namespace, nameof(TemplateSlideUseExtensions));
 
-    public static string Name(this TemplateSlideUse use) => use switch
+    extension(TemplateSlideUse use)
     {
-        TemplateSlideUse.OMIT => TB("Leave out"),
-        TemplateSlideUse.KEEP => TB("Keep unchanged"),
-        TemplateSlideUse.EDIT => TB("Let the LLM edit it"),
+        public string Name() => use switch
+        {
+            TemplateSlideUse.OMIT => TB("Leave out"),
+            TemplateSlideUse.KEEP => TB("Keep unchanged"),
+            TemplateSlideUse.EDIT => TB("Let the LLM edit it"),
 
-        _ => TB("Leave out"),
-    };
+            _ => TB("Leave out"),
+        };
+    }
 }

app/MindWork AI Studio/Assistants/TextSummarizer/ComplexityExtensions.cs

@@ -4,31 +4,34 @@ public static class ComplexityExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(ComplexityExtensions).Namespace, nameof(ComplexityExtensions));
     
-    public static string Name(this Complexity complexity) => complexity switch
+    extension(Complexity complexity)
     {
-        Complexity.NO_CHANGE => TB("No change in complexity"),
+        public string Name() => complexity switch
+        {
+            Complexity.NO_CHANGE => TB("No change in complexity"),
         
-        Complexity.SIMPLE_LANGUAGE => TB("Simple language, e.g., for children"),
-        Complexity.TEEN_LANGUAGE => TB("Teen language, e.g., for teenagers"),
-        Complexity.EVERYDAY_LANGUAGE => TB("Everyday language, e.g., for adults"),
-        Complexity.POPULAR_SCIENCE_LANGUAGE => TB("Popular science language, e.g., for people interested in science"),
-        Complexity.SCIENTIFIC_LANGUAGE_FIELD_EXPERTS => TB("Scientific language for experts in this field"),
-        Complexity.SCIENTIFIC_LANGUAGE_OTHER_EXPERTS => TB("Scientific language for experts from other fields (interdisciplinary)"),
+            Complexity.SIMPLE_LANGUAGE => TB("Simple language, e.g., for children"),
+            Complexity.TEEN_LANGUAGE => TB("Teen language, e.g., for teenagers"),
+            Complexity.EVERYDAY_LANGUAGE => TB("Everyday language, e.g., for adults"),
+            Complexity.POPULAR_SCIENCE_LANGUAGE => TB("Popular science language, e.g., for people interested in science"),
+            Complexity.SCIENTIFIC_LANGUAGE_FIELD_EXPERTS => TB("Scientific language for experts in this field"),
+            Complexity.SCIENTIFIC_LANGUAGE_OTHER_EXPERTS => TB("Scientific language for experts from other fields (interdisciplinary)"),
         
-        _ => TB("No change in complexity"),
-    };
-    
-    public static string Prompt(this Complexity complexity, string expertInField) => complexity switch
-    {
-        Complexity.NO_CHANGE => "Do not change the complexity of the text.",
+            _ => TB("No change in complexity"),
+        };
+
+        public string Prompt(string expertInField) => complexity switch
+        {
+            Complexity.NO_CHANGE => "Do not change the complexity of the text.",
         
-        Complexity.SIMPLE_LANGUAGE => "Simplify the language, e.g., for 8 to 12-year-old children. Might use short sentences and simple words. You could use analogies to explain complex terms.",
-        Complexity.TEEN_LANGUAGE => "Use a language suitable for teenagers, e.g., 16 to 19 years old. Might use teenage slang and analogies to explain complex terms.",
-        Complexity.EVERYDAY_LANGUAGE => "Use everyday language suitable for adults. Avoid specific scientific terms. Use everday analogies to explain complex terms.",
-        Complexity.POPULAR_SCIENCE_LANGUAGE => "Use popular science language, e.g., for people interested in science. The text should be easy to understand, though. Use analogies to explain complex terms.",
-        Complexity.SCIENTIFIC_LANGUAGE_FIELD_EXPERTS => "Use scientific language for experts in the field of the texts subject. Use specific terms for this field.",
-        Complexity.SCIENTIFIC_LANGUAGE_OTHER_EXPERTS => $"The reader is an expert in {expertInField}. Change the language so that it is suitable. Explain specific terms, so that the reader within his field can understand the text. You might use analogies to explain complex terms.",
+            Complexity.SIMPLE_LANGUAGE => "Simplify the language, e.g., for 8 to 12-year-old children. Might use short sentences and simple words. You could use analogies to explain complex terms.",
+            Complexity.TEEN_LANGUAGE => "Use a language suitable for teenagers, e.g., 16 to 19 years old. Might use teenage slang and analogies to explain complex terms.",
+            Complexity.EVERYDAY_LANGUAGE => "Use everyday language suitable for adults. Avoid specific scientific terms. Use everday analogies to explain complex terms.",
+            Complexity.POPULAR_SCIENCE_LANGUAGE => "Use popular science language, e.g., for people interested in science. The text should be easy to understand, though. Use analogies to explain complex terms.",
+            Complexity.SCIENTIFIC_LANGUAGE_FIELD_EXPERTS => "Use scientific language for experts in the field of the texts subject. Use specific terms for this field.",
+            Complexity.SCIENTIFIC_LANGUAGE_OTHER_EXPERTS => $"The reader is an expert in {expertInField}. Change the language so that it is suitable. Explain specific terms, so that the reader within his field can understand the text. You might use analogies to explain complex terms.",
         
-        _ => "Do not change the complexity of the text.",
-    };
+            _ => "Do not change the complexity of the text.",
+        };
+    }
 }

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingFailureExtensions.cs

@@ -13,12 +13,15 @@ internal static class VisualBriefingFailureExtensions
 {
     private static string TB(string fallbackEN) => Tools.PluginSystem.I18N.I.T(fallbackEN, typeof(VisualBriefingFailureExtensions).Namespace, nameof(VisualBriefingFailureExtensions));
 
-    /// <summary>
-    /// Gets the localized message for one recorded failure.
-    /// </summary>
     /// <param name="failure">The recorded failure.</param>
-    /// <returns>The localized message.</returns>
-    internal static string ToUserMessage(this VisualBriefingFailure failure) => ToUserMessage(failure.Code, failure.ValidationRule);
+    extension(VisualBriefingFailure failure)
+    {
+        /// <summary>
+        /// Gets the localized message for one recorded failure.
+        /// </summary>
+        /// <returns>The localized message.</returns>
+        internal string ToUserMessage() => ToUserMessage(failure.Code, failure.ValidationRule);
+    }
 
     /// <summary>
     /// Gets the localized message for one failure code and validation rule.
@@ -40,70 +43,76 @@ internal static class VisualBriefingFailureExtensions
         _ => code.ToUserMessage(),
     };
 
-    /// <summary>
-    /// Gets the localized message for one validation rule.
-    /// </summary>
     /// <param name="rule">The stable validation rule.</param>
-    /// <returns>The localized message.</returns>
-    private static string ToUserMessage(this VisualBriefingValidationRule rule) => rule switch
+    extension(VisualBriefingValidationRule rule)
     {
-        VisualBriefingValidationRule.JSON_INVALID => TB("The model did not return valid JSON. Please try again or select another model."),
-        VisualBriefingValidationRule.VALUE_TYPE_INVALID => TB("The model response contained a value of the wrong type. Please try again or select another model."),
-        VisualBriefingValidationRule.UNKNOWN_FIELD => TB("The model response contained unexpected fields. Please try again or select another model."),
-        VisualBriefingValidationRule.CONTRACT_VERSION_UNSUPPORTED => TB("The model response used an unsupported contract version. Please try again or select another model."),
-        VisualBriefingValidationRule.ID_INVALID => TB("The model response contained an empty, malformed, or duplicated identifier. Please try again or select another model."),
-        VisualBriefingValidationRule.REFERENCE_INVALID => TB("The model response referenced content that does not exist. Please try again or select another model."),
-        VisualBriefingValidationRule.SOURCE_COVERAGE_INVALID => TB("The model did not cover every source of this briefing exactly once. Please try again or select another model."),
-        VisualBriefingValidationRule.ASSET_PLAN_INVALID => TB("The model did not plan every visual asset of this briefing exactly once. Please try again or select another model."),
-        VisualBriefingValidationRule.SLOT_FULFILLMENT_INVALID => TB("The model did not fill every planned content slot exactly once. Please try again or select another model."),
-        VisualBriefingValidationRule.SLOT_VALUE_TYPE_INVALID => TB("The model filled a content slot with the wrong kind of value. Please try again or select another model."),
-        VisualBriefingValidationRule.CHART_SET_INVALID => TB("The charts of the model response did not match the planned briefing elements. Please try again or select another model."),
-        VisualBriefingValidationRule.CHART_DATA_INVALID => TB("A chart of the model response contained invalid categories or data series. Please try again or select another model."),
-        VisualBriefingValidationRule.CONTROL_ID_INVALID => TB("An interactive control of the model response used an invalid identifier. Please try again or select another model."),
-        VisualBriefingValidationRule.CONTROL_TARGET_INVALID => TB("An interactive control of the model response targeted an invalid briefing element. Please try again or select another model."),
-        VisualBriefingValidationRule.CONTROL_STATE_INVALID => TB("An interactive control of the model response used an invalid initial state. Please try again or select another model."),
-        VisualBriefingValidationRule.CONTROL_REQUIREMENT_INVALID => TB("A briefing element of the model response was missing its required interactive controls. Please try again or select another model."),
-        VisualBriefingValidationRule.FORMULA_TARGET_INVALID => TB("A calculation of the model response targeted an invalid briefing element. Please try again or select another model."),
-        VisualBriefingValidationRule.FORMULA_AST_INVALID => TB("A calculation of the model response used an invalid operation. Please try again or select another model."),
-        VisualBriefingValidationRule.ACCESSIBILITY_SET_INVALID => TB("The accessibility texts of the model response did not match the briefing elements. Please try again or select another model."),
-        VisualBriefingValidationRule.ACCESSIBILITY_TEXT_INVALID => TB("An accessibility text of the model response was empty or invalid. Please try again or select another model."),
-        VisualBriefingValidationRule.LAYOUT_INVALID => TB("The model response used an invalid briefing layout. Please try again or select another model."),
-        VisualBriefingValidationRule.TEMPLATE_ATTRIBUTE_PROHIBITED => TB("The model response used a prohibited attribute. Please try again or select another model."),
-        VisualBriefingValidationRule.MODEL_MARKUP_PROHIBITED => TB("The model response contained markup or code, which this briefing does not allow. Please try again or select another model."),
-        VisualBriefingValidationRule.COMPILER_OUTPUT_INVALID => TB("AI Studio compiled this briefing into an inconsistent result. Please copy the technical details and report this issue."),
+        /// <summary>
+        /// Gets the localized message for one validation rule.
+        /// </summary>
+        /// <returns>The localized message.</returns>
+        private string ToUserMessage() => rule switch
+        {
+            VisualBriefingValidationRule.JSON_INVALID => TB("The model did not return valid JSON. Please try again or select another model."),
+            VisualBriefingValidationRule.VALUE_TYPE_INVALID => TB("The model response contained a value of the wrong type. Please try again or select another model."),
+            VisualBriefingValidationRule.UNKNOWN_FIELD => TB("The model response contained unexpected fields. Please try again or select another model."),
+            VisualBriefingValidationRule.CONTRACT_VERSION_UNSUPPORTED => TB("The model response used an unsupported contract version. Please try again or select another model."),
+            VisualBriefingValidationRule.ID_INVALID => TB("The model response contained an empty, malformed, or duplicated identifier. Please try again or select another model."),
+            VisualBriefingValidationRule.REFERENCE_INVALID => TB("The model response referenced content that does not exist. Please try again or select another model."),
+            VisualBriefingValidationRule.SOURCE_COVERAGE_INVALID => TB("The model did not cover every source of this briefing exactly once. Please try again or select another model."),
+            VisualBriefingValidationRule.ASSET_PLAN_INVALID => TB("The model did not plan every visual asset of this briefing exactly once. Please try again or select another model."),
+            VisualBriefingValidationRule.SLOT_FULFILLMENT_INVALID => TB("The model did not fill every planned content slot exactly once. Please try again or select another model."),
+            VisualBriefingValidationRule.SLOT_VALUE_TYPE_INVALID => TB("The model filled a content slot with the wrong kind of value. Please try again or select another model."),
+            VisualBriefingValidationRule.CHART_SET_INVALID => TB("The charts of the model response did not match the planned briefing elements. Please try again or select another model."),
+            VisualBriefingValidationRule.CHART_DATA_INVALID => TB("A chart of the model response contained invalid categories or data series. Please try again or select another model."),
+            VisualBriefingValidationRule.CONTROL_ID_INVALID => TB("An interactive control of the model response used an invalid identifier. Please try again or select another model."),
+            VisualBriefingValidationRule.CONTROL_TARGET_INVALID => TB("An interactive control of the model response targeted an invalid briefing element. Please try again or select another model."),
+            VisualBriefingValidationRule.CONTROL_STATE_INVALID => TB("An interactive control of the model response used an invalid initial state. Please try again or select another model."),
+            VisualBriefingValidationRule.CONTROL_REQUIREMENT_INVALID => TB("A briefing element of the model response was missing its required interactive controls. Please try again or select another model."),
+            VisualBriefingValidationRule.FORMULA_TARGET_INVALID => TB("A calculation of the model response targeted an invalid briefing element. Please try again or select another model."),
+            VisualBriefingValidationRule.FORMULA_AST_INVALID => TB("A calculation of the model response used an invalid operation. Please try again or select another model."),
+            VisualBriefingValidationRule.ACCESSIBILITY_SET_INVALID => TB("The accessibility texts of the model response did not match the briefing elements. Please try again or select another model."),
+            VisualBriefingValidationRule.ACCESSIBILITY_TEXT_INVALID => TB("An accessibility text of the model response was empty or invalid. Please try again or select another model."),
+            VisualBriefingValidationRule.LAYOUT_INVALID => TB("The model response used an invalid briefing layout. Please try again or select another model."),
+            VisualBriefingValidationRule.TEMPLATE_ATTRIBUTE_PROHIBITED => TB("The model response used a prohibited attribute. Please try again or select another model."),
+            VisualBriefingValidationRule.MODEL_MARKUP_PROHIBITED => TB("The model response contained markup or code, which this briefing does not allow. Please try again or select another model."),
+            VisualBriefingValidationRule.COMPILER_OUTPUT_INVALID => TB("AI Studio compiled this briefing into an inconsistent result. Please copy the technical details and report this issue."),
 
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+    }
 
-    /// <summary>
-    /// Gets the localized message for one failure code.
-    /// </summary>
     /// <param name="code">The stable failure code.</param>
-    /// <returns>The localized message.</returns>
-    private static string ToUserMessage(this VisualBriefingFailureCode code) => code switch
+    extension(VisualBriefingFailureCode code)
     {
-        VisualBriefingFailureCode.PROVIDER_NOT_SELECTED => TB("This briefing has no provider selected. Please select a provider before you generate a briefing."),
-        VisualBriefingFailureCode.PROVIDER_NOT_ALLOWED => TB("The selected provider may not see the content of this briefing. Please select another provider."),
-        VisualBriefingFailureCode.MODEL_CAPABILITY_MISSING => TB("The selected model lacks a capability this briefing needs. Please select another model."),
-        VisualBriefingFailureCode.SOURCE_UNREACHABLE => TB("A source of this briefing can no longer be reached. Please relink or remove the affected source."),
-        VisualBriefingFailureCode.TRANSCRIPT_UNAVAILABLE => TB("A media transcript of this briefing is missing or outdated. Please transcribe the affected media again."),
-        VisualBriefingFailureCode.SOURCE_PREPARATION_FAILED => TB("The sources of this briefing could not be prepared."),
-        VisualBriefingFailureCode.PROVIDER_CALL_FAILED => TB("The selected provider could not complete this briefing stage."),
-        VisualBriefingFailureCode.RESPONSE_JSON_INVALID => TB("The model did not return valid JSON. Please try again or select another model."),
-        VisualBriefingFailureCode.RESPONSE_CONTRACT_INVALID => TB("The model response did not match the required contract. Please try again or select another model."),
-        VisualBriefingFailureCode.COMPILER_INVARIANT_VIOLATED => TB("AI Studio compiled this briefing into an inconsistent result. Please copy the technical details and report this issue."),
-        VisualBriefingFailureCode.SOURCE_COVERAGE_INVALID => TB("The model did not cover every source of this briefing exactly once. Please try again or select another model."),
-        VisualBriefingFailureCode.ASSET_PLAN_INVALID => TB("The model did not plan every visual asset of this briefing exactly once. Please try again or select another model."),
-        VisualBriefingFailureCode.CONTENT_SIGNATURE_INCOMPATIBLE => TB("The updated content no longer fits the current presentation. You can continue as a rebuild."),
-        VisualBriefingFailureCode.PRESENTATION_INVALID => TB("The presentation of the model response did not match the briefing contract. Please try again or select another model."),
-        VisualBriefingFailureCode.ASSEMBLY_FAILED => TB("This briefing could not be assembled."),
-        VisualBriefingFailureCode.ARTIFACT_VALIDATION_FAILED => TB("The assembled briefing did not pass the security validation."),
-        VisualBriefingFailureCode.STORE_FAILED => TB("The new version of this briefing could not be saved."),
-        VisualBriefingFailureCode.NO_CHANGES => TB("This operation did not change the briefing, so no new version was created."),
-        VisualBriefingFailureCode.CANCELED => TB("This visual briefing operation was canceled."),
-        VisualBriefingFailureCode.BUILD_INTERRUPTED => TB("AI Studio was closed while this briefing was being built. You can resume the build."),
-        VisualBriefingFailureCode.UNEXPECTED => TB("This visual briefing operation failed because of an unexpected internal error. Please copy the technical details for support."),
+        /// <summary>
+        /// Gets the localized message for one failure code.
+        /// </summary>
+        /// <returns>The localized message.</returns>
+        private string ToUserMessage() => code switch
+        {
+            VisualBriefingFailureCode.PROVIDER_NOT_SELECTED => TB("This briefing has no provider selected. Please select a provider before you generate a briefing."),
+            VisualBriefingFailureCode.PROVIDER_NOT_ALLOWED => TB("The selected provider may not see the content of this briefing. Please select another provider."),
+            VisualBriefingFailureCode.MODEL_CAPABILITY_MISSING => TB("The selected model lacks a capability this briefing needs. Please select another model."),
+            VisualBriefingFailureCode.SOURCE_UNREACHABLE => TB("A source of this briefing can no longer be reached. Please relink or remove the affected source."),
+            VisualBriefingFailureCode.TRANSCRIPT_UNAVAILABLE => TB("A media transcript of this briefing is missing or outdated. Please transcribe the affected media again."),
+            VisualBriefingFailureCode.SOURCE_PREPARATION_FAILED => TB("The sources of this briefing could not be prepared."),
+            VisualBriefingFailureCode.PROVIDER_CALL_FAILED => TB("The selected provider could not complete this briefing stage."),
+            VisualBriefingFailureCode.RESPONSE_JSON_INVALID => TB("The model did not return valid JSON. Please try again or select another model."),
+            VisualBriefingFailureCode.RESPONSE_CONTRACT_INVALID => TB("The model response did not match the required contract. Please try again or select another model."),
+            VisualBriefingFailureCode.COMPILER_INVARIANT_VIOLATED => TB("AI Studio compiled this briefing into an inconsistent result. Please copy the technical details and report this issue."),
+            VisualBriefingFailureCode.SOURCE_COVERAGE_INVALID => TB("The model did not cover every source of this briefing exactly once. Please try again or select another model."),
+            VisualBriefingFailureCode.ASSET_PLAN_INVALID => TB("The model did not plan every visual asset of this briefing exactly once. Please try again or select another model."),
+            VisualBriefingFailureCode.CONTENT_SIGNATURE_INCOMPATIBLE => TB("The updated content no longer fits the current presentation. You can continue as a rebuild."),
+            VisualBriefingFailureCode.PRESENTATION_INVALID => TB("The presentation of the model response did not match the briefing contract. Please try again or select another model."),
+            VisualBriefingFailureCode.ASSEMBLY_FAILED => TB("This briefing could not be assembled."),
+            VisualBriefingFailureCode.ARTIFACT_VALIDATION_FAILED => TB("The assembled briefing did not pass the security validation."),
+            VisualBriefingFailureCode.STORE_FAILED => TB("The new version of this briefing could not be saved."),
+            VisualBriefingFailureCode.NO_CHANGES => TB("This operation did not change the briefing, so no new version was created."),
+            VisualBriefingFailureCode.CANCELED => TB("This visual briefing operation was canceled."),
+            VisualBriefingFailureCode.BUILD_INTERRUPTED => TB("AI Studio was closed while this briefing was being built. You can resume the build."),
+            VisualBriefingFailureCode.UNEXPECTED => TB("This visual briefing operation failed because of an unexpected internal error. Please copy the technical details for support."),
 
-        _ => string.Empty,
-    };
+            _ => string.Empty,
+        };
+    }
 }

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingPreviewEndpoint.cs

@@ -15,55 +15,58 @@ internal static class VisualBriefingPreviewEndpoint
 {
     private const string ROUTE = "/visual-briefing/preview/{briefingId:guid}/{revisionId:guid}";
 
-    /// <summary>
-    /// Maps the visual briefing preview endpoint.
-    /// </summary>
     /// <param name="app">The web application.</param>
-    public static void MapVisualBriefingPreview(this WebApplication app) => app.MapGet(
-        ROUTE,
-        async (
-            Guid briefingId,
-            Guid revisionId,
-            string? token,
-            HttpContext context,
-            VisualBriefingPreviewTokenService tokenService,
-            VisualBriefingStore store,
-            ILoggerFactory loggerFactory,
-            CancellationToken cancellationToken) =>
-        {
-            var logger = loggerFactory.CreateLogger(nameof(VisualBriefingPreviewEndpoint));
-            if (!tokenService.Validate(token, briefingId, revisionId))
+    extension(WebApplication app)
+    {
+        /// <summary>
+        /// Maps the visual briefing preview endpoint.
+        /// </summary>
+        public void MapVisualBriefingPreview() => app.MapGet(
+            ROUTE,
+            async (
+                Guid briefingId,
+                Guid revisionId,
+                string? token,
+                HttpContext context,
+                VisualBriefingPreviewTokenService tokenService,
+                VisualBriefingStore store,
+                ILoggerFactory loggerFactory,
+                CancellationToken cancellationToken) =>
             {
-                logger.LogWarning(
-                    Event(VisualBriefingLogEventId.PREVIEW_REJECTED),
-                    "Visual briefing preview token rejected. BriefingId={BriefingId} RevisionId={RevisionId}",
-                    briefingId,
-                    revisionId);
+                var logger = loggerFactory.CreateLogger(nameof(VisualBriefingPreviewEndpoint));
+                if (!tokenService.Validate(token, briefingId, revisionId))
+                {
+                    logger.LogWarning(
+                        Event(VisualBriefingLogEventId.PREVIEW_REJECTED),
+                        "Visual briefing preview token rejected. BriefingId={BriefingId} RevisionId={RevisionId}",
+                        briefingId,
+                        revisionId);
 
-                return Results.NotFound();
-            }
+                    return Results.NotFound();
+                }
 
-            // The store re-validates the stored artifact before handing out a stream, so a manually
-            // modified file on disk never reaches the preview:
-            var preview = await store.OpenIntegrityCheckedVersionAsync(briefingId, revisionId, cancellationToken);
-            if (preview is null)
-            {
-                logger.LogWarning(
-                    Event(VisualBriefingLogEventId.SECURITY_REJECTED),
-                    "Visual briefing preview artifact rejected. BriefingId={BriefingId} RevisionId={RevisionId}",
-                    briefingId,
-                    revisionId);
+                // The store re-validates the stored artifact before handing out a stream, so a manually
+                // modified file on disk never reaches the preview:
+                var preview = await store.OpenIntegrityCheckedVersionAsync(briefingId, revisionId, cancellationToken);
+                if (preview is null)
+                {
+                    logger.LogWarning(
+                        Event(VisualBriefingLogEventId.SECURITY_REJECTED),
+                        "Visual briefing preview artifact rejected. BriefingId={BriefingId} RevisionId={RevisionId}",
+                        briefingId,
+                        revisionId);
 
-                return Results.NotFound();
-            }
+                    return Results.NotFound();
+                }
 
-            context.Response.Headers.CacheControl = "no-store";
-            context.Response.Headers.XContentTypeOptions = "nosniff";
-            context.Response.Headers["Referrer-Policy"] = "no-referrer";
-            context.Response.Headers.ContentSecurityPolicy = VisualBriefingArtifactService.GetContentSecurityPolicy(preview.Value.Parts);
+                context.Response.Headers.CacheControl = "no-store";
+                context.Response.Headers.XContentTypeOptions = "nosniff";
+                context.Response.Headers["Referrer-Policy"] = "no-referrer";
+                context.Response.Headers.ContentSecurityPolicy = VisualBriefingArtifactService.GetContentSecurityPolicy(preview.Value.Parts);
 
-            return Results.File(preview.Value.Stream, "text/html; charset=utf-8", enableRangeProcessing: false);
-        });
+                return Results.File(preview.Value.Stream, "text/html; charset=utf-8", enableRangeProcessing: false);
+            });
+    }
 
     /// <summary>
     /// Creates the log event ID for one visual briefing log event.