Programmers develop code with a sense of purpose and with expectations on how units of code should interact with other units of code. But this intent of programmers is typically implicit and undocumented, goes beyond considerations of functional correctness, and may depend on trust assumptions that programmers make. At present, neither programming languages nor development environments offer a means of articulating such intent in a manner that could be used for controlling whether software executions meet such intentions and their associated expectations. We here study how extant research on trust can inform approaches to articulating programmers' intent so that it may help with creating trust evidence for more trustworthy interaction of software units. © 2013 Springer-Verlag Berlin Heidelberg.