chore: import upstream snapshot with attribution

bin/nodeRuntimeSupport.mjs

@@ -0,0 +1,84 @@
+#!/usr/bin/env node
+
+export const SECURE_NODE_LINES = Object.freeze([
+  Object.freeze({ major: 22, minor: 22, patch: 2 }),
+  Object.freeze({ major: 24, minor: 0, patch: 0 }),
+  Object.freeze({ major: 25, minor: 0, patch: 0 }),
+  Object.freeze({ major: 26, minor: 0, patch: 0 }),
+]);
+
+export const RECOMMENDED_NODE_VERSION = "24.14.1";
+export const SUPPORTED_NODE_RANGE = ">=22.22.2 <23 || >=24.0.0 <27";
+export const SUPPORTED_NODE_DISPLAY =
+  "Node.js 22.22.2+ (22.x LTS), 24.0.0+ (24.x LTS), 25.0.0+ (25.x), or 26.0.0+ (26.x)";
+
+function formatVersion(version) {
+  return `${version.major}.${version.minor}.${version.patch}`;
+}
+
+export function parseNodeVersion(version = process.versions.node) {
+  const rawInput = String(version || process.versions.node || "0.0.0").trim();
+  const normalized = rawInput.replace(/^v/i, "");
+  const parts = normalized.split(".");
+  const major = Number.parseInt(parts[0] || "0", 10);
+  const minor = Number.parseInt(parts[1] || "0", 10);
+  const patch = Number.parseInt(parts[2] || "0", 10);
+
+  return {
+    raw: normalized ? `v${normalized}` : "v0.0.0",
+    normalized: normalized || "0.0.0",
+    major: Number.isFinite(major) ? major : 0,
+    minor: Number.isFinite(minor) ? minor : 0,
+    patch: Number.isFinite(patch) ? patch : 0,
+  };
+}
+
+export function compareNodeVersions(a, b) {
+  if (a.major !== b.major) return a.major - b.major;
+  if (a.minor !== b.minor) return a.minor - b.minor;
+  return a.patch - b.patch;
+}
+
+export function getSecureFloorForMajor(major) {
+  return SECURE_NODE_LINES.find((line) => line.major === major) || null;
+}
+
+export function getNodeRuntimeSupport(version = process.versions.node) {
+  const parsed = parseNodeVersion(version);
+  const secureFloor = getSecureFloorForMajor(parsed.major);
+  const nodeCompatible = secureFloor ? compareNodeVersions(parsed, secureFloor) >= 0 : false;
+
+  let reason = "unsupported-major";
+  if (nodeCompatible) {
+    reason = "supported";
+  } else if (secureFloor) {
+    reason = "below-security-floor";
+  } else if (parsed.major >= 27) {
+    reason = "unreleased-major";
+  }
+
+  return {
+    nodeVersion: parsed.raw,
+    nodeCompatible,
+    reason,
+    supportedRange: SUPPORTED_NODE_RANGE,
+    supportedDisplay: SUPPORTED_NODE_DISPLAY,
+    recommendedVersion: `v${RECOMMENDED_NODE_VERSION}`,
+    minimumSecureVersion: secureFloor ? `v${formatVersion(secureFloor)}` : null,
+  };
+}
+
+export function getNodeRuntimeWarning(version = process.versions.node) {
+  const support = getNodeRuntimeSupport(version);
+  if (support.nodeCompatible) return null;
+
+  if (support.reason === "below-security-floor" && support.minimumSecureVersion) {
+    return `Node.js ${support.nodeVersion} is below the patched minimum ${support.minimumSecureVersion} for this LTS line.`;
+  }
+
+  if (support.reason === "unreleased-major") {
+    return `Node.js ${support.nodeVersion} is outside the supported LTS lines. OmniRoute currently supports Node.js 22.x, 24.x, 25.x, and 26.x.`;
+  }
+
+  return `Node.js ${support.nodeVersion} is outside OmniRoute's approved secure runtime policy.`;
+}