/**
 * Migration 100: Create custom_agents table (spec 093, FR-39 ext).
 *
 * Per-row user-created agent type. The runtime built-ins (`feature-agent`,
 * `supervisor-agent`) are NOT stored here — they live in code. This table
 * exists so the editor can list user-defined agents alongside built-ins
 * and let the user attach prompt/graph overrides to them.
 *
 * Indexes:
 *  - unique (agent_type) — one definition per stable identifier.
 */
import type { MigrationParams } from 'umzug';
import type Database from 'better-sqlite3';
export declare function up({ context: db }: MigrationParams<Database.Database>): Promise<void>;
export declare function down({ context: db }: MigrationParams<Database.Database>): Promise<void>;
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