{
  "paths": {
    "/tasks": {
      "get": {
        "tags": ["Tasks"],
        "summary": "List tasks",
        "description": "Returns the authenticated user's tasks with optional filters. Supports status, priority, due date range, project, and cursor-based pagination. Requires `tasks:read` scope.",
        "operationId": "listTasks",
        "parameters": [
          { "name": "status", "in": "query", "schema": { "type": "string", "enum": ["todo", "in_progress", "done", "archived"] }, "description": "Filter by status" },
          { "name": "priority", "in": "query", "schema": { "type": "string", "enum": ["low", "medium", "high", "critical"] }, "description": "Filter by priority" },
          { "name": "project_id", "in": "query", "schema": { "type": "string", "format": "uuid" }, "description": "Filter by project" },
          { "name": "due_from", "in": "query", "schema": { "type": "string", "format": "date-time" }, "description": "Filter tasks due on or after" },
          { "name": "due_to", "in": "query", "schema": { "type": "string", "format": "date-time" }, "description": "Filter tasks due on or before" },
          { "name": "limit", "in": "query", "schema": { "type": "integer", "minimum": 1, "maximum": 200, "default": 50 } },
          { "name": "cursor", "in": "query", "schema": { "type": "string" }, "description": "Pagination cursor" }
        ],
        "responses": {
          "200": {
            "description": "List of tasks",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["items", "page"],
                  "properties": {
                    "items": { "type": "array", "items": { "$ref": "#/components/schemas/Task" } },
                    "page": { "$ref": "#/components/schemas/PageInfo" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "post": {
        "tags": ["Tasks"],
        "summary": "Create a task",
        "description": "Creates a new task for the authenticated user. Requires `tasks:write` scope.",
        "operationId": "createTask",
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["title"],
                "properties": {
                  "title": { "type": "string", "minLength": 1, "maxLength": 500 },
                  "description": { "type": "string" },
                  "status": { "type": "string", "enum": ["todo", "in_progress", "done", "archived"], "default": "todo" },
                  "priority": { "type": "string", "enum": ["low", "medium", "high", "critical"], "default": "medium" },
                  "due_date": { "type": "string", "format": "date-time" },
                  "project_id": { "type": "string", "format": "uuid" },
                  "parent_id": { "type": "string", "format": "uuid" },
                  "sort_order": { "type": "integer" },
                  "recurrence_rule": { "type": "string" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Task created",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["task"],
                  "properties": {
                    "task": { "$ref": "#/components/schemas/Task" }
                  }
                }
              }
            }
          },
          "400": { "description": "Validation error", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}": {
      "get": {
        "tags": ["Tasks"],
        "summary": "Get a task",
        "description": "Returns a single task by ID. Requires `tasks:read` scope.",
        "operationId": "getTask",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "responses": {
          "200": {
            "description": "Task details",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["task"],
                  "properties": {
                    "task": { "$ref": "#/components/schemas/Task" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "put": {
        "tags": ["Tasks"],
        "summary": "Update a task",
        "description": "Updates a task's fields. Requires `tasks:write` scope.",
        "operationId": "updateTask",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "title": { "type": "string", "minLength": 1, "maxLength": 500 },
                  "description": { "type": "string" },
                  "status": { "type": "string", "enum": ["todo", "in_progress", "done", "archived"] },
                  "priority": { "type": "string", "enum": ["low", "medium", "high", "critical"] },
                  "due_date": { "type": "string", "format": "date-time" },
                  "project_id": { "type": "string", "format": "uuid", "nullable": true },
                  "sort_order": { "type": "integer" },
                  "recurrence_rule": { "type": "string", "nullable": true }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Task updated",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["task"],
                  "properties": {
                    "task": { "$ref": "#/components/schemas/Task" }
                  }
                }
              }
            }
          },
          "400": { "description": "Validation error", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "delete": {
        "tags": ["Tasks"],
        "summary": "Delete a task",
        "description": "Soft-deletes a task by default. Use `?permanent=true` for hard delete. Requires `tasks:write` scope.",
        "operationId": "deleteTask",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } },
          { "name": "permanent", "in": "query", "schema": { "type": "boolean", "default": false }, "description": "If true, permanently delete (hard delete)" }
        ],
        "responses": {
          "200": { "description": "Task deleted", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/OkResponse" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/complete": {
      "post": {
        "tags": ["Tasks"],
        "summary": "Mark task complete",
        "description": "Marks a task as done. Fails if blocked by incomplete dependencies. Requires `tasks:write` scope.",
        "operationId": "markTaskComplete",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "responses": {
          "200": {
            "description": "Task marked complete",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["task"],
                  "properties": {
                    "task": { "$ref": "#/components/schemas/Task" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "409": { "description": "Blocked by incomplete dependencies", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/uncomplete": {
      "post": {
        "tags": ["Tasks"],
        "summary": "Mark task uncomplete",
        "description": "Reverts a completed task to todo (or specified status). Requires `tasks:write` scope.",
        "operationId": "markTaskUncomplete",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "properties": {
                  "status": { "type": "string", "enum": ["todo", "in_progress"], "default": "todo" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Task marked uncomplete",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["task"],
                  "properties": {
                    "task": { "$ref": "#/components/schemas/Task" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/subtasks": {
      "get": {
        "tags": ["Tasks"],
        "summary": "List subtasks",
        "description": "Returns the subtasks of a task. Requires `tasks:read` scope.",
        "operationId": "listTaskSubtasks",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "responses": {
          "200": {
            "description": "List of subtasks",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["items", "page"],
                  "properties": {
                    "items": { "type": "array", "items": { "$ref": "#/components/schemas/Task" } },
                    "page": { "$ref": "#/components/schemas/PageInfo" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/dependencies": {
      "get": {
        "tags": ["Tasks"],
        "summary": "List task blockers",
        "description": "Returns tasks that block this task from being completed. Requires `tasks:read` scope.",
        "operationId": "listTaskBlockers",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "responses": {
          "200": {
            "description": "List of blocking tasks",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["items", "page"],
                  "properties": {
                    "items": { "type": "array", "items": { "$ref": "#/components/schemas/Task" } },
                    "page": { "$ref": "#/components/schemas/PageInfo" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "post": {
        "tags": ["Tasks"],
        "summary": "Add dependency",
        "description": "Adds a dependency: the specified task blocks this task. Requires `tasks:write` scope.",
        "operationId": "addTaskDependency",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Task ID (blocked task)" }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["blocks_task_id"],
                "properties": {
                  "blocks_task_id": { "type": "string", "format": "uuid", "description": "Task that blocks this one" }
                }
              }
            }
          }
        },
        "responses": {
          "200": { "description": "Dependency added", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/OkResponse" } } } },
          "400": { "description": "Validation error (e.g. self-dependency)", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "409": { "description": "Circular dependency detected", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/dependencies/{blocksTaskId}": {
      "delete": {
        "tags": ["Tasks"],
        "summary": "Remove dependency",
        "description": "Removes a dependency. Requires `tasks:write` scope.",
        "operationId": "removeTaskDependency",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Task ID (blocked task)" },
          { "name": "blocksTaskId", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Blocker task ID" }
        ],
        "responses": {
          "200": { "description": "Dependency removed", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/OkResponse" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/reminders": {
      "get": {
        "tags": ["Tasks"],
        "summary": "List task reminders",
        "description": "Returns reminders for a task. Requires `tasks:read` scope.",
        "operationId": "listTaskReminders",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "responses": {
          "200": {
            "description": "List of reminders",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["items", "page"],
                  "properties": {
                    "items": { "type": "array", "items": { "$ref": "#/components/schemas/TaskReminder" } },
                    "page": { "$ref": "#/components/schemas/PageInfo" }
                  }
                }
              }
            }
          },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      },
      "post": {
        "tags": ["Tasks"],
        "summary": "Add task reminder",
        "description": "Creates a reminder for a task. Requires `tasks:write` scope.",
        "operationId": "addTaskReminder",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" } }
        ],
        "requestBody": {
          "required": true,
          "content": {
            "application/json": {
              "schema": {
                "type": "object",
                "required": ["type", "scheduled_at"],
                "properties": {
                  "type": { "type": "string", "enum": ["push", "email", "webhook", "telegram", "nostr"] },
                  "config": { "type": "object", "additionalProperties": true },
                  "scheduled_at": { "type": "string", "format": "date-time" }
                }
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Reminder created",
            "content": {
              "application/json": {
                "schema": {
                  "type": "object",
                  "required": ["reminder"],
                  "properties": {
                    "reminder": { "$ref": "#/components/schemas/TaskReminder" }
                  }
                }
              }
            }
          },
          "400": { "description": "Validation error", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    },
    "/tasks/{id}/reminders/{reminderId}": {
      "delete": {
        "tags": ["Tasks"],
        "summary": "Delete task reminder",
        "description": "Deletes a reminder. Requires `tasks:write` scope.",
        "operationId": "deleteTaskReminder",
        "parameters": [
          { "name": "id", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Task ID" },
          { "name": "reminderId", "in": "path", "required": true, "schema": { "type": "string", "format": "uuid" }, "description": "Reminder ID" }
        ],
        "responses": {
          "200": { "description": "Reminder deleted", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/OkResponse" } } } },
          "401": { "description": "Not authenticated", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "403": { "description": "Insufficient scope", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } },
          "404": { "description": "Task or reminder not found", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/Error" } } } }
        }
      }
    }
  }
}