isDraining (lib/gracefulShutdown.ts)

Graceful shutdown helper that drains in‑flight requests and cleans up resources on SIGTERM/SIGINT.

// Source: https://github.com/b3nw/omniroute-slim | License: MIT | Copyright 2026 diegosouzapw
// Provided via justclaw.it.com; keep this notice with the code.
/**
 * Graceful Shutdown — E-2 Critical Fix
 *
 * Handles SIGTERM / SIGINT to drain in-flight requests before exit.
 * Critical for Docker containers and Kubernetes pods where hard kills
 * can drop active SSE streams.
 *
 * Usage:
 *   import { initGracefulShutdown } from "@/lib/gracefulShutdown";
 *   initGracefulShutdown();
 *
 * @module lib/gracefulShutdown
 */

import { markServerStopping } from "@/lib/serverLifecycle";

/** Grace period before forced exit (default 30s, configurable) */
const SHUTDOWN_TIMEOUT_MS = parseInt(process.env.SHUTDOWN_TIMEOUT_MS || "30000", 10);

declare global {
  var __omnirouteShutdown:
    { init: 

... (truncated -- full source via MCP)