Denonomicon: The Dark Arts of Deno Foreign Function Interface Programming

A fan-made “grim grimoire” for Deno’s Foreign Function Interface (FFI) just landed, calling itself the Denonomicon and leaning hard into spooky vibes—“haunted by spirits” and watched over by a “Deno Shrine Maiden.” It’s not official, but it promises to explain how to make Deno (a JavaScript/TypeScript runtime) talk to native C code, filling gaps left by the Deno Manual and TypeScript definitions. Translation for non-nerds: it’s a guide for safely poking the wild world of fast, low-level code from your comfy high-level setup.

Cue the comment-section sirens. One eagle-eyed reader pounced on a line claiming FFI “works with native libraries that use the C API,” asking if it should say ABI instead—short for “Application Binary Interface,” the rules that compiled programs follow when they talk at the machine level. In plain terms: API is the menu; ABI is how the kitchen actually plates and serves it. Get that wrong, and your program could crash in dramatic fashion. The nitpick? A genuine safety PSA. The vibe? “Words matter” versus “we get what you meant.”

Meanwhile, the aesthetic is instant meme fuel. Lines like “go forth, be protected by the Shrine Maiden” are begging to be screenshotted into talismans before developers dare summon C libraries. Spooky branding, sharp advice, and a dash of pedantry—classic dev‑internet cocktail.