/**
 * v0.8 §3.4 — author-guard (defense in depth).
 *
 * @deprecated since v1.0.2 for the Discord adapter. The `isAuthorizedAuthor`
 * compare against Discord's `message.author.username` was the root cause of a
 * universal false-positive: a SoloSquad handle in `[a-z0-9_]` charset can
 * never equal a Discord username in arbitrary unicode (e.g. `seungw1n.` with
 * a trailing dot). Discord channel ACL is the canonical permission boundary
 * and SoloSquad does not own that ACL — there is no meaningful 2nd defense
 * to layer here. Discord adapter no longer calls these helpers as of v1.0.2.
 *
 * The Slack adapter still imports both functions; equivalent removal is
 * scheduled for v1.0.3. After that, this whole file goes away.
 *
 * Spec retraction: docs/plan/v1.0.2-discord-author-guard-decoupling.md.
 */
export declare function isAuthorizedAuthor(channelName: string, authorHandle: string): boolean;
/** Convenience helper for adapters: produce the ephemeral DM body. */
export declare function unauthorizedAuthorMessage(channelName: string, authorHandle: string): string;