docs: align Node support statements

# Conflicts:
#	docs/runtime-requirements.md

Author: Aming9303

README.md

@@ -57,7 +57,7 @@ npm install
 
 - **Node.js >= 20**: The SDK requires Node.js 20 or later. It relies on the built-in global `fetch`, `AbortController`, and DOM `Headers` APIs available natively from Node 20+.
 - **Global Fetch**: A standards-compliant `fetch` implementation must be available globally. If running in an environment without native fetch, provide a compatible polyfill via the `config.fetch` option when constructing the SDK.
-- **CI-Supported Versions**: Automated tests run against Node.js 20 and Node.js 22.
+- **CI-Supported Versions**: Automated tests run against Node.js 20, 22, and 24.
 - **Browser Considerations**: When using the SDK in browser environments, be aware of CORS restrictions and ensure that the `Headers` API is supported. The SDK does not include browser-specific polyfills; configure your bundler or runtime accordingly.
 - **Custom Fetch Fallback**: For unsupported runtimes (e.g., older Node versions or specialized environments), pass a custom fetch implementation through the SDK configuration to override the global default.
 

docs/runtime-requirements.md

@@ -2,11 +2,12 @@
 
 ## Node.js
 
-- Minimum: Node.js 18 (LTS)
-- Recommended: Node.js 20+ (LTS)
-- Tested: Node.js 18, 20, 22, 24
+- Minimum: Node.js 20
+- Recommended: the latest active LTS release of Node.js
+- Tested in CI: Node.js 20, 22, and 24
 
-Uses native global `fetch` (Node.js 18+).
+The SDK relies on the native global `fetch`, `AbortController`, and DOM `Headers`
+APIs available in Node.js 20 and later.
 
 ## Browser
 

tests/ci-matrix-node24.test.ts

@@ -43,4 +43,23 @@ describe('CI matrix includes Node 24', () => {
     );
     expect(uniqueVersions.size).toBeGreaterThanOrEqual(2);
   });
+
+  it('keeps the documented Node support aligned with package engines and CI', () => {
+    const packageJson = JSON.parse(
+      readFileSync(resolve(process.cwd(), 'package.json'), 'utf8'),
+    ) as { engines?: { node?: string } };
+    const readme = readFileSync(resolve(process.cwd(), 'README.md'), 'utf8');
+    const runtimeRequirements = readFileSync(
+      resolve(process.cwd(), 'docs/runtime-requirements.md'),
+      'utf8',
+    );
+
+    expect(packageJson.engines?.node).toBe('>=20.0.0');
+    expect(readme).toContain('Node.js 20, 22, and 24');
+    expect(runtimeRequirements).toContain('Minimum: Node.js 20');
+    expect(runtimeRequirements).toContain(
+      'Tested in CI: Node.js 20, 22, and 24',
+    );
+    expect(runtimeRequirements).not.toMatch(/Node\.js 18/);
+  });
 });