@lumen-seo/core

Core primitives for lumen — types, payload models, config loading, the hardened Fetcher, robots handling, and the provider/rule SPIs everything else builds on.

• Config loader — lumen.config.json with unknown-key rejection, budget clamping, and failThreshold for CI gates.
• Fetcher — per-attempt timeout, full-jitter exponential backoff, Retry-After handling, cross-origin redirect header stripping, SSRF blocklist revalidated per redirect hop.
• Robots — policy evaluation via robots-parser so every crawl stays polite by construction.
• SPIs + registries — provider and rule extension points; load custom rules from plugins with loadPluginRules (Node subpath).

import { loadConfig, createFetcher } from "@lumen-seo/core";

Ships compiled JavaScript + .d.ts — plain node import, no flags. Full docs: https://nitishagar.github.io/lumen/