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+.Dd April  5, 2026
+.Dt THAC 1
+.Os
+.
+.Sh NAME
+.Nm thac
+.Nd thalatta compiler
+.
+.Sh SYNOPSIS
+.Nm
+.Ar file
+.
+.Sh DESCRIPTION
+.Nm
+implements a procedural graph description language.
+It evaluates
+.Ar file 
+and then emits resulting graph in the following format:
+.Do
+.Va prop0
+.Va ...
+.Va propN
+|
+.Va out0
+.Va ...
+.Va outM
+.Dc ,
+where
+.Bl -dash -width Ds -compact
+.It
+.Va N ,
+.Va M
+are nonnegative integers
+.It
+.Va X
+in
+.Va propX
+is an integer
+.It
+.Va X
+in
+.Va outX
+is a nonnegative integer
+.El
+.
+.Sh RETURN VALUES
+.Ex -std
+.
+.Sh SEE ALSO
+.Xr thalatta 5
+.
+.Sh AUTHORS
+.An Nakidai Perumenei Aq Mt nakidai@disroot.org