/** SDK-owned platform module. This implementation is maintained in goodvibes-sdk. */
/**
 * The standing instruction that tells the model it is in plan mode. It is
 * appended to the system prompt while plan mode is active, so it reaches the
 * model on every turn AND, because the system prompt is the instruction chain
 * the compaction pass re-injects (see buildReinjectedInstructions), survives
 * compaction without any extra plumbing.
 */
import type { PermissionMode } from '../config/schema.js';
/** Marker so the block can be recognised in a composed system prompt / tests. */
export declare const PLAN_MODE_INSTRUCTION_MARKER = "goodvibes:plan-mode-instruction";
/** The canonical plan-mode standing instruction text. */
export declare const PLAN_MODE_INSTRUCTION: string;
/** True when the given permission mode is plan mode. */
export declare function isPlanMode(mode: PermissionMode | undefined): boolean;
/**
 * Append the plan-mode standing instruction to a base system prompt when plan
 * mode is active; otherwise return the base prompt unchanged. Used to wrap the
 * orchestrator's `getSystemPrompt` so both the live turn and the compaction
 * instruction chain carry the plan-mode instruction.
 */
export declare function appendPlanModeInstruction(basePrompt: string, mode: PermissionMode | undefined): string;
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