literate programming, development log -- ideas?

[Greg Minshall]

hi, all.

i write most of my code in a (per-project) .org file, which is typically
tangled into source or script files.  i have a question about how people
structure their .org files for this sort of use.

some of the non-source bits surrounding my source blocks are for
"classical" literate programming text, i.e., introductions to sections
of code, maybe with links to external pages for libraries or packages i
use in the associated code block.

but i also feel a need for something that might be called a lab
notebook, a development log, of ideas, including dead ends, i pursue
during the development process, with links, etc..  but, i'm not really
sure how to structure this bit, how to integrate it in the rest of the
.org file -- i.e., as a separate heading, or related to the code section
that (originally) was under development when the notes were created.
or...?  etc.

i'm wondering if people do this, especially the development log, and if
there are any hints or practices people might feel would be of interest
to share.

(sorry for the non-specificness of the question.)

cheers, Greg