/**
 * AgentGraphPrompts — ADR-5.
 *
 * Per-role system-prompt fragments that teach agents when to prefer graph_* tools.
 * All fragments are static top-level const strings (no interpolation, no I/O).
 *
 * Invariants (ADR-5):
 * - RESEARCHER-PHASE2 fragment is a literal const with ZERO template interpolation.
 *   The snapshot test in tests/researcher-phase2-prompt-isolation.test.ts pins
 *   the exact bytes. Any edit forces an explicit snapshot update + reviewer ack.
 * - All fragments are <100 words and contain no feature/task/sprint references.
 * - 'disabled' mode returns "" for every role.
 * - decorate() is pure and synchronous — no I/O, no async.
 */
import type { BoberAgentRole } from "./preflight-injector.js";
export type AgentPromptMode = "gated" | "dual" | "disabled";
export declare class AgentGraphPrompts {
    /**
     * Return the prompt fragment for a (role, mode) pair. Returns "" when no
     * fragment exists (e.g. planner, or 'disabled' mode). Callers MUST treat
     * the empty string as "no decoration".
     */
    static fragmentFor(role: BoberAgentRole, mode: AgentPromptMode): string;
    /**
     * Append the role's graph-prompt fragment to baseSystemPrompt.
     *
     * Returns baseSystemPrompt UNCHANGED when:
     *  - graph is not enabled, OR
     *  - engine health is not 'ready', OR
     *  - the fragment for (role, modeForRole(role)) is empty.
     *
     * Otherwise returns `baseSystemPrompt + "\n\n---\n\n" + fragment`.
     *
     * Gating predicate mirrors src/orchestrator/tools/index.ts:204-211 exactly
     * so the prompt surface and tool surface flip atomically.
     */
    static decorate(role: BoberAgentRole, baseSystemPrompt: string, ctx: {
        graphEnabled: boolean;
        engineHealth: string;
    }): string;
}
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