milli.nvim is a Neovim plugin for animated ASCII splash screens. It provides both pre-rendered splash animations (like fire, blackhole, skeleton) and live procedural shaders (plasma, rain, doomfire, starfield) all implemented in pure Lua using Neovim’s extmarks for coloring. The plugin integrates seamlessly with popular dashboard plugins (dashboard-nvim, alpha-nvim, snacks.nvim, mini.starter) via autocmds and preset functions. It also includes a community registry for sharing splash data, with a sandboxed loading mechanism to prevent arbitrary code execution. The codebase demonstrates careful engineering: anchor-based positioning to handle variable terminal sizes, color-run optimisation to stay within Neovim’s highlight-group limit (E849), and deterministic pseudorandom number generation in shaders to avoid corrupting math.random. The external CLI tool (npm package `milli`) allows users to generate their own splashes from images or GIFs, and the data format is simple and portable. Overall, it is a well-crafted, feature-rich plugin with clear architecture and several reusable patterns.