directive

type Config struct {
	Image   ImageConfig
	RunBash func(ctx context.Context, command string) (string, error)
}

type ImageConfig struct {
	Dimension int
	Quality   int
}

type ParsedInput struct {
	// Text is the input with directive tokens replaced by placeholders.
	Text string
	// Images holds extracted and compressed images.
	Images image.Images
	// Warnings holds non-fatal issues (file not found, decode error).
	Warnings []string
	// Preamble holds prepended context from @File and @Bash expansions.
	Preamble string
}