export declare const AGENT_TRIGGER_TYPES: readonly ["chat", "mention", "assigned"];
export type AgentTriggerType = (typeof AGENT_TRIGGER_TYPES)[number];
export declare const AGENT_TRIGGER_TYPE_LABELS: Record<AgentTriggerType, string>;
export declare function normalizeTriggerType(raw: unknown): AgentTriggerType | 'unknown';
export declare function verifyAgentSignature(signingSecret: string, rawBody: Buffer | string, timestamp: string | undefined, signature: string | undefined): boolean;
export declare function buildAgentSseBody(replyText: string): string;
export declare const AGENT_SSE_HEADERS: {
    readonly 'content-type': "text/event-stream";
    readonly 'cache-control': "no-cache";
    readonly connection: "keep-alive";
};
export declare function buildAgentResponse(replyText: string, wantsStream: boolean): {
    body: Buffer | {
        message: string;
    };
    headers: Record<string, string>;
    statusCode: number;
};
export interface AgentMentionContext {
    itemId: string | null;
    updateId: string | null;
    boardId: string | null;
}
export declare function extractAgentMentionContext(json: Record<string, unknown>): AgentMentionContext;
export declare function resolveSelectedTriggerTypes(param: unknown): AgentTriggerType[];
export declare const EXTERNAL_AGENT_USER_KIND = "external_agent_member";
export declare const EXTERNAL_AGENT_DETACHED_USER_KIND = "external_agent_detached_member";
export declare function isExternalAgentTokenKind(kind: unknown): boolean;
export interface AgentIdentity {
    userId: string;
    userName: string;
    kind: string;
    email: string | null;
    agentId: string;
    agentName: string;
    agentKind: string | null;
    state: string | null;
    agentUserId: string | null;
    appFeatureId: string | null;
    goal: string | null;
    createdAt: string | null;
    updatedAt: string | null;
}
export declare function formatAgentIdentityLabel(identity: AgentIdentity): string;