very basic opencode completions for fish

opencode.fish

# Disable default file completion unless yargs gives nothing
complete -c opencode -f

function __opencode_yargs_completions
    # Tokens up to cursor (excluding current token)
    set -l tokens (commandline -opc)

    # Current token (may be empty or '-')
    set -l cur (commandline -ct)

    # If there *is* a current token, append it
    if test -n "$cur"
        set tokens $tokens $cur
    end

    opencode --get-yargs-completions $tokens 2>/dev/null
end

complete -c opencode -f -k -a "(__opencode_yargs_completions)"
complete -c opencode --force-files