diff --git a/ECMJobRunner.Domain/AGENTS.md b/ECMJobRunner.Domain/AGENTS.md
new file mode 100644
index 0000000..836f962
--- /dev/null
+++ b/ECMJobRunner.Domain/AGENTS.md
@@ -0,0 +1,142 @@
+# ECMJobRunner.Domain
+
+## Project Overview
+
+ECMJobRunner.Domain is a domain entity library for the ECM Job Runner system. This project contains entity models that represent the database schema for job runner configuration and execution history.
+
+## Target Frameworks
+
+- **.NET Framework 4.8** (`net480`)
+- **.NET 8.0** (`net8.0`)
+
+The project is multi-targeted to support both legacy .NET Framework applications and modern .NET 8 applications.
+
+## Technologies
+
+### Entity Framework
+- **For .NET Framework 4.8**: Entity Framework 6.5.1
+- **For .NET 8.0**: Entity Framework Core 8.0.11 with SQL Server provider
+
+## Project Structure
+
+```
+ECMJobRunner.Domain/
+├── Entities/
+│   ├── Profile.cs              # Job configuration profile entity
+│   ├── ProfileSqlJob.cs        # SQL job configuration entity
+│   └── ProfileHistory.cs       # Job execution history entity
+├── ECMJobRunner.Domain.csproj
+└── AGENTS.md                   # This file
+```
+
+## Entities
+
+### Profile
+**Table:** `dbo.TBJR_CFG_PROFILE`
+
+Represents a job runner profile configuration.
+
+**Key Properties:**
+- `Id` (PK): Primary key, auto-generated
+- `Active`: Enable/disable switch
+- `ProfileName`: Name of the profile
+- `TypeId`: Profile type (0=ADSync, 1=GraphQL, 2=SQL-Job, 3=SQL and REST-Job)
+- `Schedule`: Cron format schedule
+- `Comment`: Optional description
+
+**Relationships:**
+- One-to-Many with `ProfileSqlJob` (SQL jobs)
+- One-to-Many with `ProfileHistory` (execution history)
+
+### ProfileSqlJob
+**Table:** `dbo.TBJR_CFG_PROFILE_SQLJOB`
+
+Represents individual SQL jobs within a profile.
+
+**Key Properties:**
+- `Id` (PK): Primary key, auto-generated
+- `ProfileId` (FK): Foreign key to `Profile`
+- `Active`: Enable/disable switch
+- `Sequence`: Execution order within the profile
+- `Name`: Optional job name
+- `SqlCheckQuery`: SQL query for pre-check
+- `SqlMainQuery`: Main SQL query
+- `ApiCommand`: API command to execute
+
+**Relationships:**
+- Many-to-One with `Profile`
+
+### ProfileHistory
+**Table:** `dbo.TBJR_OUT_PROFILE_HISTORY`
+
+Stores execution history and results of job profiles.
+
+**Key Properties:**
+- `Id` (PK): Primary key, auto-generated
+- `ProfileId` (FK): Foreign key to `Profile`
+- `ResultId`: Result status (0=OK, 1=ERROR, 2=WARNING)
+- `ResultText`: Result message/details
+
+**Relationships:**
+- Many-to-One with `Profile`
+
+## Database Schema Source
+
+The entities are based on SQL Server tables located at:
+```
+M:\Datenbank\[DD_ECM]-Database\JobRunner\
+```
+
+The following SQL files define the schema:
+- `[TBJR_CFG_PROFILE].sql` - Profile configuration table
+- `[TBJR_CFG_PROFILE_SQLJOB].sql` - SQL job configuration table
+- `[TBJR_OUT_PROFILE_HISTORY].sql` - Execution history table
+- `[VWJR_CFG_PROFILE].sql` - Profile view (not implemented as entity)
+- `[VWJR_CFG_PROFILE_SQLJOB].sql` - SQL job view (not implemented as entity)
+
+## Naming Conventions
+
+- **Entity Classes**: Clean Pascal case (e.g., `Profile` instead of `TBJR_CFG_PROFILE`)
+- **Properties**: Pascal case (e.g., `ProfileName` instead of `PROFILE_NAME`)
+- **Table Mapping**: Uses `[Table]` attribute to map to actual database table names
+- **Column Mapping**: Uses `[Column]` attribute to map to actual column names
+- Entity names are simplified without technical prefixes (Jr/Cfg/Out)
+
+## Attributes Used
+
+- `[Table]` - Specifies the database table name and schema
+- `[Column]` - Specifies the database column name
+- `[Key]` - Marks the primary key
+- `[Required]` - Marks non-nullable properties
+- `[MaxLength]` - Specifies maximum string length
+- `[ForeignKey]` - Specifies foreign key relationships
+- `[DatabaseGenerated]` - Specifies identity/auto-generated columns
+
+## Building the Project
+
+To build the project:
+
+```bash
+dotnet build ECMJobRunner.Domain.csproj
+```
+
+To build for a specific framework:
+
+```bash
+dotnet build ECMJobRunner.Domain.csproj -f net8.0
+dotnet build ECMJobRunner.Domain.csproj -f net480
+```
+
+## Development Notes
+
+- All entities include audit fields: `AddedWho`, `AddedWhen`, `ChangedWho`, `ChangedWhen`
+- Navigation properties are marked as `virtual` to support lazy loading
+- Nullable reference types are enabled for better null-safety
+- XML documentation is generated for IntelliSense support
+- Default values are set according to database constraints
+
+## Company Information
+
+**Author**: Digital Data GmbH  
+**Copyright**: 2026  
+**Repository**: http://git.dd:3000/AppStd/ECMJobRunner.git
diff --git a/ECMJobRunner.Domain/ECMJobRunner.Domain.csproj b/ECMJobRunner.Domain/ECMJobRunner.Domain.csproj
index 37684e6..2101351 100644
--- a/ECMJobRunner.Domain/ECMJobRunner.Domain.csproj
+++ b/ECMJobRunner.Domain/ECMJobRunner.Domain.csproj
@@ -2,6 +2,8 @@
 
 	<PropertyGroup>
 		<TargetFrameworks>net480;net8.0</TargetFrameworks>
+		<LangVersion>latest</LangVersion>
+		<Nullable>enable</Nullable>
 		<DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(MSBuildProjectName).xml</DocumentationFile>
 		<PackageId>ECMJobRunner.Domain</PackageId>
 		<Authors>Digital Data GmbH</Authors>
@@ -9,7 +11,19 @@
 		<Product>ECMJobRunner.Domain</Product>
 		<Copyright>Copyright 2026</Copyright>
 		<RepositoryUrl>http://git.dd:3000/AppStd/ECMJobRunner.git</RepositoryUrl>
-		<PackageTags>digital data ecm job runner</PackageTags>
+		<PackageTags>digital data ecm job runner domain</PackageTags>
 	</PropertyGroup>
 
+	<ItemGroup Condition="'$(TargetFramework)' == 'net480'">
+		<!-- Entity Framework 6 for .NET Framework 4.8 -->
+		<PackageReference Include="EntityFramework" Version="6.5.1" />
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
+		<!-- Entity Framework Core 8 for .NET 8 -->
+		<PackageReference Include="Microsoft.EntityFrameworkCore" Version="8.0.11" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="8.0.11" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="8.0.11" />
+	</ItemGroup>
+
 </Project>
diff --git a/ECMJobRunner.Domain/Entities/Profile.cs b/ECMJobRunner.Domain/Entities/Profile.cs
new file mode 100644
index 0000000..ee8f851
--- /dev/null
+++ b/ECMJobRunner.Domain/Entities/Profile.cs
@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ECMJobRunner.Domain.Entities
+{
+    /// <summary>
+    /// Job Runner Configuration Profile Entity
+    /// Represents a job runner profile configuration
+    /// Type: 0 = ADSync; 1 = GraphQL; 2 = SQL-Job; 3 = SQL and REST-Job
+    /// </summary>
+    [Table("TBJR_CFG_PROFILE", Schema = "dbo")]
+    public class Profile
+    {
+        /// <summary>
+        /// Primary Key
+        /// </summary>
+        [Key]
+        [Column("PK_TBJR_CFG_PROFILE_ID")]
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public long Id { get; set; }
+
+        /// <summary>
+        /// Active / Inactive switch
+        /// </summary>
+        [Required]
+        [Column("ACTIVE")]
+        public bool Active { get; set; } = true;
+
+        /// <summary>
+        /// Optional profile name
+        /// </summary>
+        [Required]
+        [Column("PROFILE_NAME")]
+        [MaxLength(150)]
+        public string ProfileName { get; set; } = null!;
+
+        /// <summary>
+        /// Profile type: 0 = ADSync; 1 = GraphQL; 2 = SQL-Job; 3 = SQL and REST-Job
+        /// </summary>
+        [Required]
+        [Column("TYPE_ID")]
+        public byte TypeId { get; set; }
+
+        /// <summary>
+        /// Schedule in Cron format
+        /// </summary>
+        [Required]
+        [Column("SCHEDULE")]
+        [MaxLength(150)]
+        public string Schedule { get; set; } = "0 30 4 ? * MON-SAT";
+
+        /// <summary>
+        /// Optional description
+        /// </summary>
+        [Column("COMMENT")]
+        [MaxLength(500)]
+        public string? Comment { get; set; }
+
+        /// <summary>
+        /// Created by
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHO")]
+        [MaxLength(50)]
+        public string AddedWho { get; set; } = "DEFAULT";
+
+        /// <summary>
+        /// Created at
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHEN")]
+        public DateTime AddedWhen { get; set; } = DateTime.Now;
+
+        /// <summary>
+        /// Modified by
+        /// </summary>
+        [Column("CHANGED_WHO")]
+        [MaxLength(50)]
+        public string? ChangedWho { get; set; }
+
+        /// <summary>
+        /// Modified at
+        /// </summary>
+        [Column("CHANGED_WHEN")]
+        public DateTime? ChangedWhen { get; set; }
+
+        // Navigation properties
+        
+        /// <summary>
+        /// SQL Jobs associated with this profile
+        /// </summary>
+        public virtual ICollection<ProfileSqlJob> SqlJobs { get; set; } = new List<ProfileSqlJob>();
+
+        /// <summary>
+        /// Profile execution history
+        /// </summary>
+        public virtual ICollection<ProfileHistory> ProfileHistories { get; set; } = new List<ProfileHistory>();
+    }
+}
diff --git a/ECMJobRunner.Domain/Entities/ProfileHistory.cs b/ECMJobRunner.Domain/Entities/ProfileHistory.cs
new file mode 100644
index 0000000..ca8acdc
--- /dev/null
+++ b/ECMJobRunner.Domain/Entities/ProfileHistory.cs
@@ -0,0 +1,80 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ECMJobRunner.Domain.Entities
+{
+    /// <summary>
+    /// Profile Execution History
+    /// Stores the execution history and results of job runner profiles
+    /// Result ID: 0 = OK; 1 = ERROR; 2 = WARNING
+    /// </summary>
+    [Table("TBJR_OUT_PROFILE_HISTORY", Schema = "dbo")]
+    public class ProfileHistory
+    {
+        /// <summary>
+        /// Primary Key
+        /// </summary>
+        [Key]
+        [Column("PK_TBJR_OUT_PROFILE_HISTORY_ID")]
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public long Id { get; set; }
+
+        /// <summary>
+        /// Foreign Key to Profile
+        /// </summary>
+        [Required]
+        [Column("FK_TBJR_CFG_PROFILE_ID")]
+        [ForeignKey(nameof(Profile))]
+        public long ProfileId { get; set; }
+
+        /// <summary>
+        /// Result ID: 0 = OK; 1 = ERROR; 2 = WARNING
+        /// </summary>
+        [Required]
+        [Column("RESULT_ID")]
+        public byte ResultId { get; set; }
+
+        /// <summary>
+        /// Result text/message
+        /// </summary>
+        [Required]
+        [Column("RESULT_TEXT")]
+        public string ResultText { get; set; } = string.Empty;
+
+        /// <summary>
+        /// Created by
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHO")]
+        [MaxLength(50)]
+        public string AddedWho { get; set; } = "DEFAULT";
+
+        /// <summary>
+        /// Created at
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHEN")]
+        public DateTime AddedWhen { get; set; } = DateTime.Now;
+
+        /// <summary>
+        /// Modified by
+        /// </summary>
+        [Column("CHANGED_WHO")]
+        [MaxLength(50)]
+        public string? ChangedWho { get; set; }
+
+        /// <summary>
+        /// Modified at
+        /// </summary>
+        [Column("CHANGED_WHEN")]
+        public DateTime? ChangedWhen { get; set; }
+
+        // Navigation properties
+
+        /// <summary>
+        /// Associated Profile
+        /// </summary>
+        public virtual Profile Profile { get; set; } = null!;
+    }
+}
diff --git a/ECMJobRunner.Domain/Entities/ProfileSqlJob.cs b/ECMJobRunner.Domain/Entities/ProfileSqlJob.cs
new file mode 100644
index 0000000..bc167b4
--- /dev/null
+++ b/ECMJobRunner.Domain/Entities/ProfileSqlJob.cs
@@ -0,0 +1,111 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace ECMJobRunner.Domain.Entities
+{
+    /// <summary>
+    /// SQL Job Configuration for Profile
+    /// Represents individual SQL jobs within a job runner profile
+    /// </summary>
+    [Table("TBJR_CFG_PROFILE_SQLJOB", Schema = "dbo")]
+    public class ProfileSqlJob
+    {
+        /// <summary>
+        /// Primary Key
+        /// </summary>
+        [Key]
+        [Column("PK_TBJR_CFG_PROFILE_SQLJOB_ID")]
+        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+        public long Id { get; set; }
+
+        /// <summary>
+        /// Foreign Key to Profile
+        /// </summary>
+        [Required]
+        [Column("FK_TBJR_CFG_PROFILE_ID")]
+        [ForeignKey(nameof(Profile))]
+        public long ProfileId { get; set; }
+
+        /// <summary>
+        /// Active / Inactive switch
+        /// </summary>
+        [Required]
+        [Column("ACTIVE")]
+        public bool Active { get; set; } = true;
+
+        /// <summary>
+        /// Sequence order within the profile
+        /// </summary>
+        [Required]
+        [Column("SEQUENCE")]
+        public short Sequence { get; set; } = 0;
+
+        /// <summary>
+        /// Optional name
+        /// </summary>
+        [Column("NAME")]
+        [MaxLength(150)]
+        public string? Name { get; set; }
+
+        /// <summary>
+        /// SQL Check Query
+        /// </summary>
+        [Column("SQL_CHECK_QUERY")]
+        public string? SqlCheckQuery { get; set; }
+
+        /// <summary>
+        /// SQL Main Query
+        /// </summary>
+        [Column("SQL_MAIN_QUERY")]
+        public string? SqlMainQuery { get; set; }
+
+        /// <summary>
+        /// API Command
+        /// </summary>
+        [Column("API_COMMAND")]
+        public string? ApiCommand { get; set; }
+
+        /// <summary>
+        /// Optional description
+        /// </summary>
+        [Column("COMMENT")]
+        [MaxLength(500)]
+        public string? Comment { get; set; }
+
+        /// <summary>
+        /// Created by
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHO")]
+        [MaxLength(50)]
+        public string AddedWho { get; set; } = "DEFAULT";
+
+        /// <summary>
+        /// Created at
+        /// </summary>
+        [Required]
+        [Column("ADDED_WHEN")]
+        public DateTime AddedWhen { get; set; } = DateTime.Now;
+
+        /// <summary>
+        /// Modified by
+        /// </summary>
+        [Column("CHANGED_WHO")]
+        [MaxLength(50)]
+        public string? ChangedWho { get; set; }
+
+        /// <summary>
+        /// Modified at
+        /// </summary>
+        [Column("CHANGED_WHEN")]
+        public DateTime? ChangedWhen { get; set; }
+
+        // Navigation properties
+
+        /// <summary>
+        /// Associated Profile
+        /// </summary>
+        public virtual Profile Profile { get; set; } = null!;
+    }
+}