I'm not sure I understand - are you saying that I should make it a completely internal parameter? The value of the parameter is still read in inside ReadParameterFile, we just don't check if it's set in that file anymore.
1) remove any mention of AddParticleAttributes from the "Particle parameters" page and 2) to explain that star particles can be turned on after the simulation is initialized in the "Star formation and feedback" page.
Not to nitpick, but NumberOfParticleAttributes is an internal parameter but is still included in the docs. Should AddParticleAttributes be left in the docs but changed to "(internal)" explaining that it gets set to true when Enzo realizes it needs to set up particle attributes to allow for stars?
Edit: I realized that NumberOfParticleAttributes is slightly different in that it gets written to the parameter file just never read from a parameter file. Given that, yes, it probably make sense to remove AddParticleAttributes from the docs completely since the user never really needs to know about it.