/**
 * Assert every workflow-id constraint that predates WFT-95: a string,
 * non-empty, at most {@link MAX_WORKFLOW_ID_LENGTH} characters, and free of
 * control characters. Deliberately does NOT reject the exact strings `.` or
 * `..` — those were valid workflow ids before WFT-95 and may already be
 * durably persisted (a schedule id, a persisted `currentWorkflowId`, a
 * queued run's `workflowId`, schedule-run metadata, an `executionStateOwnerId`
 * or `parentWorkflowId`/`restartedFrom.workflowId` on a decoded
 * `WorkflowState`). Decode and schedule-control (lookup, pause, resume,
 * cancel, update) paths must keep accepting them so an upgrade doesn't
 * strand pre-existing data or make a pre-existing schedule/workflow
 * unmanageable; only fresh admission ({@link assertValidWorkflowId}) adds
 * the `.`/`..` rejection.
 *
 * Takes `unknown`, not `string` (WFT-95 review): every caller passes an
 * already-decoded field whose static `WorkflowState`/`ScheduleState` type
 * says `string` but whose runtime shape is untrusted — the storage record
 * could be corrupted. Without an explicit `typeof` guard here, a decoded
 * array of strings would pass (`.length`, iteration, and
 * `containsControlCharacter()`'s per-element `codePointAt()` all succeed on
 * an array too), silently accepting a malformed field instead of dropping
 * it — the same guard `coerceStartWorkflowId()` performed before this
 * predicate existed.
 */
export declare function assertDecodableWorkflowId(id: unknown, fieldName?: string): asserts id is string;
/** Whether `id` satisfies {@link assertDecodableWorkflowId}. */
export declare function isDecodableWorkflowId(id: unknown): boolean;
/**
 * Whether `id` is exactly `.` or `..` — the two literals
 * {@link assertValidWorkflowId} rejects at fresh admission (WFT-95). Exported
 * so callers that need to recognize "this id is the one strict admission
 * would reject" without re-running the full assertion (for example, to
 * decide whether a caller-facing id MIGHT be a legacy pre-WFT-95 record
 * worth checking storage for) share one definition instead of re-deriving
 * the literal comparison.
 */
export declare function isReservedWorkflowIdLiteral(id: string): boolean;
export declare function assertValidWorkflowId(id: string, fieldName?: string): void;