{
  "openapi": "3.1.0",
  "info": {
    "title": "rust-template",
    "description": "Axum API server",
    "license": {
      "name": "MIT",
      "identifier": "MIT"
    },
    "version": "0.1.0"
  },
  "paths": {
    "/api/v1/items": {
      "get": {
        "tags": [
          "items"
        ],
        "summary": "List items, newest first.",
        "operationId": "list_items",
        "parameters": [
          {
            "name": "page",
            "in": "query",
            "description": "1-based page index.",
            "required": false,
            "schema": {
              "type": "integer",
              "format": "int32",
              "minimum": 0
            }
          },
          {
            "name": "per_page",
            "in": "query",
            "description": "Page size (max 100).",
            "required": false,
            "schema": {
              "type": "integer",
              "format": "int32",
              "minimum": 0
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Paged item list",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ItemPage"
                }
              }
            }
          }
        }
      },
      "post": {
        "tags": [
          "items"
        ],
        "summary": "Create an item.",
        "operationId": "create_item",
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/CreateItemRequest"
              }
            }
          },
          "required": true
        },
        "responses": {
          "201": {
            "description": "Created item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ItemResponse"
                }
              }
            }
          },
          "400": {
            "description": "Validation error",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    },
    "/api/v1/items/{id}": {
      "get": {
        "tags": [
          "items"
        ],
        "summary": "Fetch a single item.",
        "operationId": "get_item",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Item id",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ItemResponse"
                }
              }
            }
          },
          "404": {
            "description": "Missing item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      },
      "delete": {
        "tags": [
          "items"
        ],
        "summary": "Delete an item.",
        "operationId": "delete_item",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Item id",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "204": {
            "description": "Deleted"
          },
          "404": {
            "description": "Missing item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      },
      "patch": {
        "tags": [
          "items"
        ],
        "summary": "Replace selected item fields.",
        "operationId": "update_item",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "Item id",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/UpdateItemRequest"
              }
            }
          },
          "required": true
        },
        "responses": {
          "200": {
            "description": "Updated item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ItemResponse"
                }
              }
            }
          },
          "404": {
            "description": "Missing item",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    },
    "/api/v1/llm/ws": {
      "get": {
        "tags": [
          "llm"
        ],
        "description": "WebSocket upgrade. After 101, send LlmRequest as one text frame. Server sends LlmWsEvent frames.",
        "operationId": "send",
        "responses": {
          "101": {
            "description": "Switching Protocols"
          }
        }
      }
    },
    "/api/v1/queries/list": {
      "get": {
        "tags": [
          "queries"
        ],
        "description": "Get all saved queries",
        "operationId": "get_queries",
        "parameters": [
          {
            "name": "limit",
            "in": "query",
            "description": "Maximum number of queries to return",
            "required": false,
            "schema": {
              "type": "integer",
              "format": "int64"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Fetched LLM queries",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/SavedQueriesResponse"
                }
              }
            }
          },
          "400": {
            "description": "Validation error",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    },
    "/api/v1/queries/{id}": {
      "get": {
        "tags": [
          "queries"
        ],
        "description": "Get a single saved query by ID",
        "operationId": "get_query",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "required": true,
            "schema": {
              "type": "string",
              "format": "uuid"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Fetched LLM query",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/LlmQueryDetail"
                }
              }
            }
          },
          "400": {
            "description": "Validation error",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          },
          "404": {
            "description": "Query not found",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    },
    "/health/live": {
      "get": {
        "tags": [
          "health"
        ],
        "summary": "Liveness probe. Process is up.",
        "operationId": "live",
        "responses": {
          "200": {
            "description": "Process is running",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/HealthResponse"
                }
              }
            }
          }
        }
      }
    },
    "/health/ready": {
      "get": {
        "tags": [
          "health"
        ],
        "summary": "Readiness probe. Database is reachable.",
        "operationId": "ready",
        "responses": {
          "200": {
            "description": "Database is reachable",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ReadyResponse"
                }
              }
            }
          },
          "500": {
            "description": "Database is unreachable",
            "content": {
              "application/json": {
                "schema": {
                  "$ref": "#/components/schemas/ErrorBody"
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "CreateItemRequest": {
        "type": "object",
        "required": [
          "name"
        ],
        "properties": {
          "description": {
            "type": [
              "string",
              "null"
            ]
          },
          "name": {
            "type": "string"
          }
        }
      },
      "ErrorBody": {
        "type": "object",
        "description": "Stable JSON error envelope returned by every handler.",
        "required": [
          "error"
        ],
        "properties": {
          "error": {
            "$ref": "#/components/schemas/ErrorDetail"
          }
        }
      },
      "ErrorDetail": {
        "type": "object",
        "required": [
          "status",
          "code",
          "message"
        ],
        "properties": {
          "code": {
            "type": "string"
          },
          "message": {
            "type": "string"
          },
          "status": {
            "type": "integer",
            "format": "int32",
            "minimum": 0
          },
          "trace_id": {
            "type": [
              "string",
              "null"
            ]
          }
        }
      },
      "HealthResponse": {
        "type": "object",
        "required": [
          "status",
          "service"
        ],
        "properties": {
          "service": {
            "type": "string"
          },
          "status": {
            "type": "string"
          }
        }
      },
      "ItemPage": {
        "type": "object",
        "required": [
          "items",
          "page",
          "per_page",
          "total"
        ],
        "properties": {
          "items": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/ItemResponse"
            }
          },
          "page": {
            "type": "integer",
            "format": "int32",
            "minimum": 0
          },
          "per_page": {
            "type": "integer",
            "format": "int32",
            "minimum": 0
          },
          "total": {
            "type": "integer",
            "format": "int64"
          }
        }
      },
      "ItemResponse": {
        "type": "object",
        "required": [
          "id",
          "name",
          "created_at",
          "updated_at"
        ],
        "properties": {
          "created_at": {
            "type": "string",
            "format": "date-time"
          },
          "description": {
            "type": [
              "string",
              "null"
            ]
          },
          "id": {
            "type": "string",
            "format": "uuid"
          },
          "name": {
            "type": "string"
          },
          "updated_at": {
            "type": "string",
            "format": "date-time"
          }
        }
      },
      "LlmQuery": {
        "type": "object",
        "required": [
          "id",
          "title"
        ],
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid"
          },
          "title": {
            "type": "string"
          }
        }
      },
      "LlmQueryDetail": {
        "type": "object",
        "required": [
          "id",
          "title",
          "messages"
        ],
        "properties": {
          "id": {
            "type": "string",
            "format": "uuid"
          },
          "messages": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "title": {
            "type": "string"
          }
        }
      },
      "ReadyResponse": {
        "type": "object",
        "required": [
          "status",
          "database"
        ],
        "properties": {
          "database": {
            "type": "string"
          },
          "status": {
            "type": "string"
          }
        }
      },
      "SavedQueriesResponse": {
        "type": "object",
        "required": [
          "queries"
        ],
        "properties": {
          "queries": {
            "type": "array",
            "items": {
              "$ref": "#/components/schemas/LlmQuery"
            }
          }
        }
      },
      "UpdateItemRequest": {
        "type": "object",
        "properties": {
          "description": {
            "type": [
              "string",
              "null"
            ]
          },
          "name": {
            "type": [
              "string",
              "null"
            ]
          }
        }
      }
    }
  },
  "tags": [
    {
      "name": "health",
      "description": "Liveness and readiness"
    },
    {
      "name": "items",
      "description": "Example CRUD resource"
    }
  ]
}