Visual Explainer by @nicopreme is one of those small-but-brilliant ideas that quietly solves a real pain point in agent-heavy workflows. Instead of forcing yourself to parse endless terminal walls of diffs, plans, logs or architecture dumps, the agent just renders the explanation as clean, consistent HTML — complete with Mermaid diagrams, tables, callouts, typography polish, and even slide-deck style layouts when asked. The bundled CSS pattern library + reusable templates are what make it actually usable day-to-day: no more one-off ugly markdown → everything looks like it was designed once and stays that way. Seeing it explode to >5.5k GitHub stars in a few weeks (and still growing), plus praise from people like Simon Willison linking it in agentic pattern guides, tells you it hit exactly the right nerve: cognitive debt is the silent killer in long agent sessions, and this is an elegant, open-source fix. Very clever, very timely. If you're spending hours squinting at agent output in 2026, this is probably worth installing today.