-- Add change_sets and change_set_entries tables
CREATE TABLE `change_sets` (
  `id` text PRIMARY KEY NOT NULL,
  `agent_id` text REFERENCES `agents`(`id`) ON DELETE SET NULL,
  `agent_name` text NOT NULL,
  `initiative_id` text NOT NULL REFERENCES `initiatives`(`id`) ON DELETE CASCADE,
  `mode` text NOT NULL,
  `summary` text,
  `status` text NOT NULL DEFAULT 'applied',
  `reverted_at` integer,
  `created_at` integer NOT NULL
);--> statement-breakpoint
CREATE TABLE `change_set_entries` (
  `id` text PRIMARY KEY NOT NULL,
  `change_set_id` text NOT NULL REFERENCES `change_sets`(`id`) ON DELETE CASCADE,
  `entity_type` text NOT NULL,
  `entity_id` text NOT NULL,
  `action` text NOT NULL,
  `previous_state` text,
  `new_state` text,
  `sort_order` integer NOT NULL DEFAULT 0,
  `created_at` integer NOT NULL
);--> statement-breakpoint
CREATE INDEX `change_sets_initiative_id_idx` ON `change_sets`(`initiative_id`);--> statement-breakpoint
CREATE INDEX `change_set_entries_change_set_id_idx` ON `change_set_entries`(`change_set_id`);