/**
 * Index-build worker thread.
 *
 * CREATE INDEX over an already-populated table is a full table read plus a
 * B-tree write — ~8 s on the 2 GB production symbol DB. node:sqlite is
 * synchronous, so running that on the main thread blocks the event loop for its
 * whole duration and the MCP client (VS Code Copilot) can time the server out
 * before it answers its first request. Running it here, on its own connection,
 * keeps the main thread serving; WAL mode lets this write proceed alongside the
 * main thread's readers.
 *
 * Spawned by XppSymbolIndex.ensureDeferredIndexes() and posts a single message:
 *   { ok: true, elapsedMs } | { ok: false, error }
 *
 * The connection is NOT read-only (unlike symbolCountsWorker) — this one writes.
 */
export {};
//# sourceMappingURL=buildIndexWorker.d.ts.map