/**
 * Connected-account name generation and validation.
 *
 * A connected AWS account's display name flows into deployment target names
 * (`generateTargetName`) AND into CFN / profile identifiers, so the name must be
 * a clean slug and must NOT already carry a region short-code suffix — otherwise
 * the region is appended twice (`acme-widgets-prod-use2` → target `…-use2-use2`).
 *
 * Single source of truth for the default-name shape and the region-suffix guard,
 * shared by the webapp connect / quick-create ingress and the CLI connect screen.
 */
/**
 * Default name for a newly-connected account: `<org>-<stage>` as a clean slug.
 * `stage` must be the DECODED workload stage (e.g. "production"), never a raw
 * wire `environment` value. An empty stage yields the org slug alone.
 * e.g. ("Acme.example", "production") → "acme-example-production".
 */
export declare function defaultConnectedAccountName(orgName: string, stage: string): string;
/**
 * Append a short disambiguating suffix to a base account name when the base
 * collides with an existing account (the `<org>-<stage>` default is taken).
 * e.g. ("acme-example-production", "a3f9") → "acme-example-production-a3f9".
 */
export declare function suffixedAccountName(base: string, shortId: string): string;
/**
 * Every region short code an account name could be mistakenly suffixed with:
 * the codes `abbreviateRegion` emits today (the same derivation
 * `generateTargetName` appends), plus the retired ones it used to emit.
 *
 * The retired half matters because this set only ever answers "would appending
 * a region to this name read as a doubled region?" — and it would, for a name a
 * customer picked while an older Fjall was emitting the old codes. Deriving the
 * set from the live codes alone would quietly start accepting `acme-aps1` as an
 * account name the day the abbreviations changed.
 */
export declare const REGION_SHORT_CODES: ReadonlySet<string>;
/**
 * Detect a trailing region short-code segment on an account name — the shape
 * that doubles the region when `generateTargetName` appends its own. Returns the
 * offending code (e.g. "use2") or undefined. Region-agnostic: any trailing
 * known short code is flagged, not only the currently-selected region's, so a
 * `foo-usw2` name picked into us-east-1 is still caught. A region code that
 * appears anywhere but the final segment (`use2-team`) is intentionally allowed.
 */
export declare function findTrailingRegionShortCode(name: string): string | undefined;
/**
 * User-facing rejection copy for a region-suffixed account name. Shared by the
 * webapp and CLI ingress so the wording cannot drift.
 */
export declare function regionSuffixRejectionMessage(shortCode: string): string;