Struct GenerateContext 

pub struct GenerateContext<'a> {
    pub prefix: &'a str,
    pub buffer: &'a Buffer,
    pub registry: &'a CommandRegistry,
    pub case_sensitive: bool,
}

Snapshot of editor state a generator may need to consult. Held by reference so the pipeline borrows from the surrounding frame for the duration of the call. Generators that don’t need buffer or registry state simply ignore those fields.

buffer is the raw rope-backed text the cmdline cursor sits over. We pass &Buffer rather than the full Document so completion stays decoupled from the actor crate (lattice-runtime); generators that need richer document state will get a &DocumentSnapshot once a consumer requires one.

Fields

prefix: &'a str

Partial text in the current slot, before the cursor. The matcher gets the same string as query – generators may also use it (e.g. gen:files resolves the directory by splitting prefix at the last /).

buffer: &'a Buffer

registry: &'a CommandRegistry

case_sensitive: bool

Whether matching should be case-sensitive. Generators that do their own filtering before returning candidates honor this; pure “produce everything” generators ignore it.