/**
 * True when the line is one of the 72-dash frames upstream draws around its
 * blocks.
 *
 * Exported for the failure-note builders, because a frame is never a cause and
 * the block removal alone does not get rid of every one: the frame's CLOSING
 * rule survives whenever the cause line follows it with no blank line between
 * (measured 2026-10-06 against the real binary — `files` on an unreadable store
 * leaves `────…` and then `[ERR] Failed to list files: file is not a database`,
 * and the note quoted the rule).
 */
export declare function isBackendRuleLine(raw: string): boolean;
/**
 * Rewrites the `Backend:   wasm` status line and collapses the
 * `WASM SQLite fallback active` block to one note. The match is anchored — a
 * run of block lines ends at the first line that is not a block shape. Output
 * with no wasm advice (notably a `Backend:   native` index) passes through
 * byte-for-byte, and the transform is idempotent.
 */
export declare function rewriteSqliteBackendAdvice(text: string): string;
/**
 * Removes the block instead of replacing it, for callers that quote one line
 * of upstream output as a failure cause. The status line is still rewritten,
 * so no deleted-package name survives either way.
 */
export declare function dropSqliteBackendAdvice(text: string): string;