/**
 * Migration 098: Create agent_prompt_overrides table (spec 093, task-50).
 *
 * Per-(agentType, promptId) override of bundled prompt strings shipped
 * under packages/core/src/infrastructure/services/agents/<agent>/nodes/prompts/.
 *
 * The runtime prompt resolver (IAgentPromptResolver) consults this table
 * before falling back to the bundled string. Removing the row restores
 * byte-identical bundled behaviour (spec 093 NFR-16).
 *
 * Indexes:
 *  - unique (agent_type, prompt_id) — at most one active override per slot.
 *  - non-unique (agent_type) — list-by-agent lookups in the editor.
 */
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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