Function execute_with_env 

pub fn execute_with_env(
    registry: &CommandRegistry,
    document: &mut Document,
    buffer_id: BufferId,
    cursor: Position,
    invocation: CommandInvocation,
    cancel: &CancellationToken,
    env: GrammarEnv<'_>,
) -> GrammarResult<Effect>

N.1.4a / N.1.6 (2026-06-10): execute plus the per-dispatch GrammarEnv — the tree-sitter scope_resolver (af/ac) and the comment_syntax (aC/iC). The host builds the env (N.1.4b / N.1.6) and threads it down to the TextObjectContext; the classic objects (iw, ap, i{) ignore it.