diff --git a/.gitignore b/.gitignore
index c077bc4..ab52275 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,2 @@
 bin/
 *.exe
-.sisyphus/
diff --git a/hpc_server_openapi.json b/hpc_server_openapi.json
index d3f300e..5a1d98c 100644
--- a/hpc_server_openapi.json
+++ b/hpc_server_openapi.json
@@ -2,7 +2,7 @@
   "openapi": "3.0.3",
   "info": {
     "title": "GCY HPC Server API",
-    "description": "Slurm HPC cluster management API for job submission, cluster monitoring, and job template management.",
+    "description": "Slurm HPC cluster management API for job submission and cluster monitoring.",
     "version": "0.1.0"
   },
   "servers": [
@@ -21,8 +21,8 @@
       "description": "Cluster node, partition, and diagnostic information"
     },
     {
-      "name": "Templates",
-      "description": "Job template CRUD operations"
+      "name": "Applications",
+      "description": "Application definition CRUD and job submission"
     }
   ],
   "paths": {
@@ -674,6 +674,395 @@
         }
       }
     },
+    "/applications": {
+      "get": {
+        "tags": ["Applications"],
+        "summary": "List applications",
+        "description": "Retrieves a paginated list of application definitions.",
+        "operationId": "listApplications",
+        "parameters": [
+          {
+            "name": "page",
+            "in": "query",
+            "description": "Page number (starts from 1)",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "minimum": 1,
+              "default": 1
+            }
+          },
+          {
+            "name": "page_size",
+            "in": "query",
+            "description": "Number of items per page",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "minimum": 1,
+              "default": 20
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Paginated list of applications",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "$ref": "#/components/schemas/ApplicationListResponse"
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "tags": ["Applications"],
+        "summary": "Create an application",
+        "description": "Creates a new application definition.",
+        "operationId": "createApplication",
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/CreateApplicationRequest"
+              }
+            }
+          }
+        },
+        "responses": {
+          "201": {
+            "description": "Application created successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "type": "object",
+                          "properties": {
+                            "id": {
+                              "type": "integer",
+                              "format": "int64",
+                              "description": "Created application ID"
+                            }
+                          }
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid request body or missing required fields",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/applications/{id}": {
+      "get": {
+        "tags": ["Applications"],
+        "summary": "Get application by ID",
+        "description": "Retrieves a specific application definition.",
+        "operationId": "getApplication",
+        "parameters": [
+          { "$ref": "#/components/parameters/ApplicationId" }
+        ],
+        "responses": {
+          "200": {
+            "description": "Application details",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "$ref": "#/components/schemas/Application"
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Application not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      },
+      "put": {
+        "tags": ["Applications"],
+        "summary": "Update an application",
+        "description": "Updates an existing application definition.",
+        "operationId": "updateApplication",
+        "parameters": [
+          { "$ref": "#/components/parameters/ApplicationId" }
+        ],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/UpdateApplicationRequest"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Application updated successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "type": "object",
+                          "properties": {
+                            "message": {
+                              "type": "string",
+                              "example": "application updated"
+                            }
+                          }
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid request body",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Application not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      },
+      "delete": {
+        "tags": ["Applications"],
+        "summary": "Delete an application",
+        "description": "Deletes an application definition by ID.",
+        "operationId": "deleteApplication",
+        "parameters": [
+          { "$ref": "#/components/parameters/ApplicationId" }
+        ],
+        "responses": {
+          "200": {
+            "description": "Application deleted successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "type": "object",
+                          "properties": {
+                            "message": {
+                              "type": "string",
+                              "example": "application deleted"
+                            }
+                          }
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Application not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "500": {
+            "description": "Internal server error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/applications/{id}/submit": {
+      "post": {
+        "tags": ["Applications"],
+        "summary": "Submit a job from an application",
+        "description": "Submits a Slurm job using the application's script template and provided parameter values.",
+        "operationId": "submitApplication",
+        "parameters": [
+          { "$ref": "#/components/parameters/ApplicationId" }
+        ],
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/ApplicationSubmitRequest"
+              }
+            }
+          }
+        },
+        "responses": {
+          "201": {
+            "description": "Job submitted successfully",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "allOf": [
+                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
+                    {
+                      "type": "object",
+                      "properties": {
+                        "data": {
+                          "$ref": "#/components/schemas/JobResponse"
+                        }
+                      }
+                    }
+                  ]
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "Invalid request body or missing required parameter values",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "Application not found",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          },
+          "502": {
+            "description": "Slurm backend error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/ApiResponseError"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
     "/diag": {
       "get": {
         "tags": ["Cluster"],
@@ -714,350 +1103,6 @@
           }
         }
       }
-    },
-    "/templates": {
-      "get": {
-        "tags": ["Templates"],
-        "summary": "List all templates",
-        "description": "Retrieves a paginated list of job templates.",
-        "operationId": "listTemplates",
-        "parameters": [
-          {
-            "name": "page",
-            "in": "query",
-            "description": "Page number (default: 1)",
-            "schema": {
-              "type": "integer",
-              "minimum": 1,
-              "default": 1
-            }
-          },
-          {
-            "name": "page_size",
-            "in": "query",
-            "description": "Items per page (default: 20)",
-            "schema": {
-              "type": "integer",
-              "minimum": 1,
-              "default": 20
-            }
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Paginated list of templates",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "allOf": [
-                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
-                    {
-                      "type": "object",
-                      "properties": {
-                        "data": {
-                          "$ref": "#/components/schemas/TemplateListResponse"
-                        }
-                      }
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "Internal server error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          }
-        }
-      },
-      "post": {
-        "tags": ["Templates"],
-        "summary": "Create a template",
-        "description": "Creates a new job template with the provided script and parameters.",
-        "operationId": "createTemplate",
-        "requestBody": {
-          "required": true,
-          "content": {
-            "application/json": {
-              "schema": {
-                "$ref": "#/components/schemas/CreateTemplateRequest"
-              }
-            }
-          }
-        },
-        "responses": {
-          "201": {
-            "description": "Template created successfully",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "allOf": [
-                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
-                    {
-                      "type": "object",
-                      "properties": {
-                        "data": {
-                          "type": "object",
-                          "properties": {
-                            "id": {
-                              "type": "integer",
-                              "format": "int64",
-                              "description": "The ID of the newly created template"
-                            }
-                          }
-                        }
-                      }
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid request body or missing required fields",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                },
-                "examples": {
-                  "invalid_body": {
-                    "value": {
-                      "success": false,
-                      "error": "invalid request body"
-                    }
-                  },
-                  "missing_fields": {
-                    "value": {
-                      "success": false,
-                      "error": "name and script are required"
-                    }
-                  }
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "Internal server error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          }
-        }
-      }
-    },
-    "/templates/{id}": {
-      "get": {
-        "tags": ["Templates"],
-        "summary": "Get template by ID",
-        "description": "Retrieves a specific job template.",
-        "operationId": "getTemplate",
-        "parameters": [
-          {
-            "$ref": "#/components/parameters/TemplateId"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Template details",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "allOf": [
-                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
-                    {
-                      "type": "object",
-                      "properties": {
-                        "data": {
-                          "$ref": "#/components/schemas/JobTemplate"
-                        }
-                      }
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid template ID",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          },
-          "404": {
-            "description": "Template not found",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "Internal server error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          }
-        }
-      },
-      "put": {
-        "tags": ["Templates"],
-        "summary": "Update a template",
-        "description": "Updates an existing job template.",
-        "operationId": "updateTemplate",
-        "parameters": [
-          {
-            "$ref": "#/components/parameters/TemplateId"
-          }
-        ],
-        "requestBody": {
-          "required": true,
-          "content": {
-            "application/json": {
-              "schema": {
-                "$ref": "#/components/schemas/UpdateTemplateRequest"
-              }
-            }
-          }
-        },
-        "responses": {
-          "200": {
-            "description": "Template updated successfully",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "allOf": [
-                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
-                    {
-                      "type": "object",
-                      "properties": {
-                        "data": {
-                          "type": "object",
-                          "properties": {
-                            "message": {
-                              "type": "string",
-                              "example": "template updated"
-                            }
-                          }
-                        }
-                      }
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid template ID or request body",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          },
-          "404": {
-            "description": "Template not found",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "Internal server error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          }
-        }
-      },
-      "delete": {
-        "tags": ["Templates"],
-        "summary": "Delete a template",
-        "description": "Deletes a job template by ID.",
-        "operationId": "deleteTemplate",
-        "parameters": [
-          {
-            "$ref": "#/components/parameters/TemplateId"
-          }
-        ],
-        "responses": {
-          "200": {
-            "description": "Template deleted successfully",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "allOf": [
-                    { "$ref": "#/components/schemas/ApiResponseSuccess" },
-                    {
-                      "type": "object",
-                      "properties": {
-                        "data": {
-                          "type": "object",
-                          "properties": {
-                            "message": {
-                              "type": "string",
-                              "example": "template deleted"
-                            }
-                          }
-                        }
-                      }
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "Invalid template ID",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          },
-          "500": {
-            "description": "Internal server error",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ApiResponseError"
-                }
-              }
-            }
-          }
-        }
-      }
     }
   },
   "components": {
@@ -1089,11 +1134,11 @@
           "type": "string"
         }
       },
-      "TemplateId": {
+      "ApplicationId": {
         "name": "id",
         "in": "path",
         "required": true,
-        "description": "Template ID",
+        "description": "Application ID",
         "schema": {
           "type": "integer",
           "format": "int64"
@@ -1536,145 +1581,204 @@
           }
         }
       },
-      "JobTemplate": {
+      "ParameterSchema": {
+        "type": "object",
+        "required": ["name", "type"],
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "Parameter name"
+          },
+          "label": {
+            "type": "string",
+            "description": "Display label"
+          },
+          "type": {
+            "type": "string",
+            "enum": ["string", "integer", "enum", "file", "directory", "boolean"],
+            "description": "Parameter type"
+          },
+          "required": {
+            "type": "boolean",
+            "description": "Whether this parameter is required"
+          },
+          "default": {
+            "type": "string",
+            "description": "Default value"
+          },
+          "options": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            },
+            "description": "Available options for enum type"
+          },
+          "description": {
+            "type": "string",
+            "description": "Parameter description"
+          }
+        }
+      },
+      "Application": {
         "type": "object",
         "properties": {
           "id": {
             "type": "integer",
             "format": "int64",
-            "description": "Template ID"
+            "description": "Application ID"
           },
           "name": {
             "type": "string",
-            "description": "Template name"
+            "description": "Application name"
           },
           "description": {
             "type": "string",
-            "description": "Template description"
+            "description": "Application description"
           },
-          "script": {
+          "icon": {
             "type": "string",
-            "description": "Job script content"
+            "description": "Application icon"
           },
-          "partition": {
+          "category": {
             "type": "string",
-            "description": "Default partition"
+            "description": "Application category"
           },
-          "qos": {
+          "script_template": {
             "type": "string",
-            "description": "Default QOS"
+            "description": "Job script template"
           },
-          "cpus": {
+          "parameters": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/ParameterSchema"
+            },
+            "description": "Parameter definitions"
+          },
+          "scope": {
+            "type": "string",
+            "description": "Application scope",
+            "default": "system"
+          },
+          "created_by": {
             "type": "integer",
-            "description": "Default CPU count"
-          },
-          "memory": {
-            "type": "string",
-            "description": "Default memory"
-          },
-          "time_limit": {
-            "type": "string",
-            "description": "Default time limit"
+            "format": "int64",
+            "description": "Creator user ID",
+            "nullable": true
           },
           "created_at": {
             "type": "string",
             "format": "date-time",
-            "description": "Creation timestamp"
+            "description": "Creation timestamp",
+            "nullable": true
           },
           "updated_at": {
             "type": "string",
             "format": "date-time",
-            "description": "Last update timestamp"
+            "description": "Last update timestamp",
+            "nullable": true
           }
         }
       },
-      "CreateTemplateRequest": {
+      "CreateApplicationRequest": {
         "type": "object",
-        "required": ["name", "script"],
+        "required": ["name", "script_template"],
         "properties": {
           "name": {
             "type": "string",
-            "description": "Template name"
+            "description": "Application name"
           },
           "description": {
             "type": "string",
-            "description": "Template description"
+            "description": "Application description"
           },
-          "script": {
+          "icon": {
             "type": "string",
-            "description": "Job script content"
+            "description": "Application icon"
           },
-          "partition": {
+          "category": {
             "type": "string",
-            "description": "Default partition"
+            "description": "Application category"
           },
-          "qos": {
+          "script_template": {
             "type": "string",
-            "description": "Default QOS"
+            "description": "Job script template"
           },
-          "cpus": {
-            "type": "integer",
-            "description": "Default CPU count"
-          },
-          "memory": {
-            "type": "string",
-            "description": "Default memory"
-          },
-          "time_limit": {
-            "type": "string",
-            "description": "Default time limit"
-          }
-        }
-      },
-      "UpdateTemplateRequest": {
-        "type": "object",
-        "properties": {
-          "name": {
-            "type": "string",
-            "description": "Template name"
-          },
-          "description": {
-            "type": "string",
-            "description": "Template description"
-          },
-          "script": {
-            "type": "string",
-            "description": "Job script content"
-          },
-          "partition": {
-            "type": "string",
-            "description": "Default partition"
-          },
-          "qos": {
-            "type": "string",
-            "description": "Default QOS"
-          },
-          "cpus": {
-            "type": "integer",
-            "description": "Default CPU count"
-          },
-          "memory": {
-            "type": "string",
-            "description": "Default memory"
-          },
-          "time_limit": {
-            "type": "string",
-            "description": "Default time limit"
-          }
-        }
-      },
-      "TemplateListResponse": {
-        "type": "object",
-        "properties": {
-          "templates": {
+          "parameters": {
             "type": "array",
             "items": {
-              "$ref": "#/components/schemas/JobTemplate"
-            }
+              "$ref": "#/components/schemas/ParameterSchema"
+            },
+            "description": "Parameter definitions"
+          },
+          "scope": {
+            "type": "string",
+            "description": "Application scope",
+            "default": "system"
+          }
+        }
+      },
+      "UpdateApplicationRequest": {
+        "type": "object",
+        "properties": {
+          "name": {
+            "type": "string",
+            "description": "Application name"
+          },
+          "description": {
+            "type": "string",
+            "description": "Application description"
+          },
+          "icon": {
+            "type": "string",
+            "description": "Application icon"
+          },
+          "category": {
+            "type": "string",
+            "description": "Application category"
+          },
+          "script_template": {
+            "type": "string",
+            "description": "Job script template"
+          },
+          "parameters": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/ParameterSchema"
+            },
+            "description": "Parameter definitions"
+          },
+          "scope": {
+            "type": "string",
+            "description": "Application scope"
+          }
+        }
+      },
+      "ApplicationSubmitRequest": {
+        "type": "object",
+        "required": ["values"],
+        "properties": {
+          "values": {
+            "type": "object",
+            "additionalProperties": {
+              "type": "string"
+            },
+            "description": "Parameter name to value mapping"
+          }
+        }
+      },
+      "ApplicationListResponse": {
+        "type": "object",
+        "properties": {
+          "applications": {
+            "type": "array",
+            "items": {
+              "$ref": "#/components/schemas/Application"
+            },
+            "description": "List of applications"
           },
           "total": {
             "type": "integer",
-            "description": "Total number of templates"
+            "description": "Total number of applications"
           },
           "page": {
             "type": "integer",