export declare const NATIVE_DRIFT_RECEIPT_SCHEMA = "hasna.skills.native-drift-receipt.v1";
export declare const NATIVE_DRIFT_RECEIPT_DIRECTORY = "native-drift";
/** A native tool-policy refusal: denying a native payload skill is the
 * protection that keeps a drifted station safe, so it is never failed open. */
export declare class NativeSkillPolicyRefusal extends Error {
}
/** The skills-cli bridge itself could not be verified: it is missing or
 * modified, or the managed binding that names it is missing, incompatible or
 * no longer resolves. A tool call that would load the bridge is refused; a
 * prompt, session or subagent event fails open with NATIVE_DRIFT_BRIDGE_NOTICE. */
export declare class NativeBridgeIntegrityRefusal extends NativeSkillPolicyRefusal {
}
export declare function isNativeSkillDrift(error: unknown): error is Error;
export declare function isNativeBridgeIntegrityRefusal(error: unknown): error is NativeBridgeIntegrityRefusal;
/** Escape controls, format characters and line separators as \uXXXX so a path
 * from the file system cannot hide or reorder warning text, then bound it. */
export declare function boundedDriftReason(message: string, limit?: number): string;
export declare function nativeDriftRepair(agent: string): string;
/** One visible line: what happened, the bounded drift reason (it names the
 * changed path or copies), the repair command and the receipt path. */
export declare function nativeDriftWarning(agent: string, message: string, receiptPath: string | null): string;
/** Fixed agent-facing notice for the turn whose Skills context was omitted. */
export declare const NATIVE_DRIFT_AGENT_NOTICE = "Skills context is unavailable for this turn because the station's native skill discovery changed; the change was reported to the operator. Continue the user's task. Load a selected skill explicitly with `skills load <slug>` if one is needed, and do not load native skill copies.";
/** Fixed agent-facing notice when the skills-cli bridge itself is unverified:
 * the bridge tool is refused this turn, so the agent uses the CLI instead. */
export declare const NATIVE_DRIFT_BRIDGE_NOTICE = "Skills context is unavailable for this turn because the station's skills-cli bridge could not be verified; the change was reported to the operator. Continue the user's task, but do not invoke the skills-cli native skill until it is repaired. Run the `skills` command directly (for example `skills load <slug>`) if a skill is needed, and do not load native skill copies.";
export interface NativeDriftReceipt {
    schema: typeof NATIVE_DRIFT_RECEIPT_SCHEMA;
    agent: string;
    status: "active" | "cleared";
    code: "NATIVE_SKILL_DRIFT";
    event: string;
    promptBlocked: false;
    skillsContext: "omitted";
    reason: string;
    reasonSha256: string;
    repair: string;
    firstSeenAt: string;
    lastSeenAt: string;
    occurrences: number;
    clearedAt?: string;
}
export declare function nativeDriftReceiptPath(dataDir: string, agent: string): string;
/** Record or refresh the active receipt for this agent. Never throws: the
 * warning says when the receipt could not be recorded. */
export declare function recordNativeDriftReceipt(dataDir: string, agent: string, event: string, message: string, now?: Date): string | null;
/** After a clean verification: mark an active receipt cleared, keeping its
 * history. Absent or already cleared receipts are left untouched. */
export declare function clearNativeDriftReceipt(dataDir: string, agent: string, now?: Date): void;
/** Every readable receipt, for operators and monitors. */
export declare function readNativeDriftReceipts(dataDir: string): NativeDriftReceipt[];
/** The non-blocking envelope for drift, in each native adapter's own shape. */
export declare function nativeDriftFailOpen(dataDir: string, agent: string, event: string, nativeEvent: string, message: string, options?: {
    bridgeUnverified?: boolean;
}): Record<string, unknown>;