Forgeline is a fast, static study hub for software engineering. It has 24 role-based roadmaps (Backend, Full Stack, Frontend, AI Engineer, DevOps, DevSecOps, Android, Data Engineer, Cyber Security, Game Developer, SEO and more), plus guides, deep dives, interview Q&A, MCQ test prep, spaced-repetition flashcards, timed mock interviews and a skill map. It covers 46 topics in about 180 pages and 200,000+ words, with Mermaid diagrams, runnable code and real-world case studies. Everything runs in the browser. Progress is saved in localStorage, so there's no account to create and no backend to run. Roadmap topic checklists are inspired by roadmap.sh, and all explanations are original. It merges two earlier projects, SWE Forge and PrepShelf, into one content taxonomy compiled from plain Markdown.