WordNet (r) 3.0 (2006):

well-behaved
    adj 1: (usually of children) someone who behaves in a manner
           that the speaker believes is correct; "a well-behaved
           child" [syn: well-behaved, well behaved]

The Jargon File (version 4.4.7, 29 Dec 2003):

well-behaved
 adj.

    1. Software that does its job quietly and without counterintuitive effects.
    Esp.: said of software having an interface spec sufficiently simple and
    well-defined that it can be used as a tool by other software. See cat.

    2. Said of an algorithm that doesn't crash or blow up, even when given
    pathological input. Implies that the stability of the algorithm is
    intrinsic, which makes this somewhat different from bulletproof.


The Free On-line Dictionary of Computing (30 December 2018):

well-behaved

   1. [primarily MS-DOS] Said of software conforming to system
   interface guidelines and standards.  Well-behaved software
   uses the operating system to do chores such as keyboard
   input, allocating memory and drawing graphics.  Oppose
   ill-behaved.

   2. Software that does its job quietly and without
   counterintuitive effects.  Especially said of software having
   an interface spec sufficiently simple and well-defined that it
   can be used as a tool by other software.  See cat.

   [Jargon File]