Add a Binding Feature

Companion Guidance

Use karpathy-guidelines alongside this skill for implementation or review work. Keep changes scoped, surface assumptions, and define focused validation before editing.

Use this skill when a change affects the public runtime surface and must stay in parity across the Rust core, FFI, and one or more bindings.

Do not use this skill for:

• Internal-only core refactors with no public API change
• Binding-local bug fixes that do not change shared behavior
• Docs-only or example-only updates

Implementation Order