native-codelisted

# native-code Domain knowledge for building native extensions for the BEAM VM. Covers the NIF boundary (C and Rust), SIMD via Zig, and the cross-cutting concerns that apply regardless of implementation language. For general language patterns (C, Zig, Rust), see droo-stack. ## What You Get - NIF boundary patterns (C `erl_nif.h`, Rust Rustler, Zig SIMD) - Scheduler contract and memory model rules - Elixir-side module structure for NIF wrappers - Common crash/leak patterns and fixes - Two-level testing strategy (native unit + ExUnit boundary) ## When to use - Writing or reviewing NIF code (C `erl_nif.h` or Rust Rustler) - Integrating Zig SIMD routines into BEAM via C ABI - Designing the Elixir-side module for a NIF - Debugging scheduler issues, memory leaks, or crashes at the native boundary - Building tree-sitter grammar parsers as NIFs - Setting up precompiled NIF releases ## When NOT to use - General C, Zig, or Rust coding -- use droo-stack - General Elixir patterns -- use droo-stack - Raxol TUI framework -- use raxol skill ## Reading guide | Working on | Read | | ------------------------------------------------- | --------------------------------------------------------------- | | Scheduler contract, memory model, deployment | [references/boundary-patterns](references/boundary-patterns.md) | | Elixir-side NIF module structure | [references/nif-eli