import type { Condition } from "../types.ts";
import type { FnState } from "./runtime-state.ts";
import type { ArtifactStore } from "./artifact-store.ts";
export interface CondEnv {
    sessionID: string;
    fnName: string;
    state: FnState;
    artifacts: ArtifactStore;
    requiredEvidence: string[];
    userMessagedThisTurn: boolean;
    workspaceDir: string;
}
export declare function evaluateCondition(cond: Condition | undefined, env: CondEnv): boolean;
/** Known condition names, derived from NAMED_CONDITIONS keys.
 * Includes both built-in conditions and any registered via registerCondition().
 */
export declare const KNOWN_CONDITIONS: Set<string>;
/**
 * Refresh KNOWN_CONDITIONS to include any dynamically registered conditions.
 * Called after registerCondition() adds new entries.
 */
export declare function refreshKnownConditions(): void;
/**
 * Register a custom named condition at runtime.
 * If the name already exists, logs a warning and overwrites.
 * @param name Condition name (used in frontmatter gate/transition/continue_until)
 * @param handler Function that evaluates the condition given an arg string and CondEnv
 */
export declare function registerCondition(name: string, handler: (arg: string, env: CondEnv) => boolean): void;
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