The bundle provides two packages, fenxitok and fenixpar.

The fenixtok package provides user macros to add material to a token register; the material will be (automatically) removed from the token register when the register is executed. Material may be added either to the left or to the right, and care is taken not to override any redefinition that may be included in the token register itself.

The fenixpar package uses the macros of fenixtok to provide a user interface to manipulation of the \everypar token register.

The packages require the e-TeX extensions; with them, they work either with Plain TeX or with LaTeX.

The author is Javier Múgica de Rivera.