These are the functions available from the Tcl-object scripts. Lifted from the tclpd.tcl script with some comments added.

pd::error_msg {m}                           # prints an error message on the console
pd::add_inlet {self sel}                    # creates an inlet of type sel
pd::add_outlet {self {sel {}}}              # creates an outlet of type sel (allowed are: bang float list symbol)
pd::outlet {self numInlet selector args}    # used inside class for outputting some value
pd::read_class_options {classname options}
pd::class {classname args}                  # this handles the pd::class definition
pd::guiclass {classname args}
pd::post {args}                             # wrapper to post() withouth vargs
pd::args {}                                 # gets the argument list
pd::arg {n {assertion any}}                 # get an argument from the args list
pd::default_arg {n assertion defval}
pd::strip_selectors {pdlist}                # convert a Pd list to a Tcl list
pd::add_selector {s}                        # convert a Tcl type to Pd type
pd::add_selectors {tcllist}                 # convert a Tcl list to a Pd list
pd::strip_empty {tcllist}
pd::add_empty {tcllist}
pd::guiproc {name argz body}                # mechanism for uploading procs to gui interp,
                                            without the hassle of escaping [encoder]
pd::get_binbuf {self}