Changelog

A running log of new tools, lessons, and improvements across Lifan Dev.

  1. A more active learning experience

    Philosophy Accounting
    • Lessons now track your position section-by-section, with a progress rail you can click to jump between beats.
    • Navigate between sections with the J / K keys for a focused, paced reading rhythm.
    • Inline "quick checks" are interleaved through lessons so you recall as you read, not just at the end.
    • An interactive "River of Change" demo brings the Heraclitus vs. Parmenides debate to life in Module 1.
    • The home page now shows a "Continue where you left off" card with per-course progress.

  2. Agent Engineering Lab

    Agent Lab
    • Twelve focused labs on production AI agent engineering: messages, schemas, tools, the loop, retrieval, MCP, evals, approvals, and operations.

  3. Accounting & Philosophy foundations

    Philosophy Accounting
    • Launched the Accounting Fundamentals course with interactive calculators, simulators, and visualizers.
    • Launched the Introduction to Philosophy course covering ancient through modern thought.
← Back to tools