/**
 * Env-var decisions for post-sync tail work.
 *
 * These three toggles are personal, machine-local opt-outs — an operator sets
 * one on their OWN box to skip a tail step for themselves — so they are read
 * straight from their environment variables, NOT a rollout registry. Removing
 * the registry lookup keeps every existing opt-out exactly as it was and stops a
 * future registration from silently revoking it. The runner evaluates them
 * synchronously: post-sync work must stay usable offline and before auth settles.
 *
 * The value match is load-bearing and asymmetric on purpose: ONLY the exact
 * value "0" opts a step out; unset, "false", and every other value keep it ON.
 * Do not "tidy" this into a normal boolean parse — that would silently disable
 * everyone who wrote "false".
 */
/**
 * Stable identifiers for the three post-sync toggles, mapped to the operator
 * env var that turns each off. These keys are never sent to any registry.
 */
export declare const POST_SYNC_FLAG_KEYS: {
    readonly qmdReindex: "sync.qmd-reindex";
    readonly conflictPrune: "sync.conflict-prune";
    readonly codexMaterialize: "agents.codex-materialize";
};
export type PostSyncFlagKey = (typeof POST_SYNC_FLAG_KEYS)[keyof typeof POST_SYNC_FLAG_KEYS];
export interface PostSyncFlagEvaluator {
    isEnabled(flagKey: PostSyncFlagKey): boolean;
}
export interface CreatePostSyncFlagEvaluatorOptions {
    /** Environment source; defaults to `process.env`. */
    env?: Readonly<Record<string, string | undefined>>;
}
/**
 * Build an evaluator that resolves each toggle from its own environment
 * variable. Fully synchronous — no endpoint, token, or network I/O.
 */
export declare function createPostSyncFlagEvaluator(options?: CreatePostSyncFlagEvaluatorOptions): PostSyncFlagEvaluator;
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