Module keymap_host 

The keymap guest→host binding-registration seam (PL8.D.1).

A keymap plugin implements the keymap-plugin world: it imports the keymap API (register-binding) and exports register-keymap (the host calls it once to drive registration). This module holds the bindgen! for that world plus the host-side bind logic — factored here (the config_host precedent) so it is unit-testable without a Store.

The canonical API is the WIT (keymap.wit) — any component-model language calls register-binding directly. The first consumer is the user’s init.rs: a plain global keybind is the one config kind with no other seam. Bindings land in KeymapLayer::User, gated by KeymapCapability::User — above the built-in vim grammar, never KeymapLayer::Builtin (the standing keymap-ownership rule). Binding resolution on every keystroke stays native (the KeymapHandle trie), so there is no per-keystroke WASM — the seam rides the async linker, registration-only.

Structs

KeymapBindingToken

A user keybinding the plugin registered — the teardown token (PL8.D.2): the KeymapLayer::User entry for (mode, chord) is unbound on unload. chord is the vim-notation string as the guest supplied it (re-parsed at unbind).