A culinary bundle - grown together for the kitchen, with no interspecies claim made.
Chosen for the kitchen. The two ingredients of pesto you can grow — sweet basil and garlic. The pine nuts and the cheese come from elsewhere; there is no interspecies mechanism, only a co-harvest for the mortar.
At least 0.5 m²5.4 ft². A bed smaller than that does not get this guild quietly substituted for something else — the planner greys it out, says why, and offers the nearest adaptation that does fit.
Nothing is left living in the bed over winter; the whole planting is re-established.
No interspecies mechanism is claimed. It is grouped for a reason, and that reason is written below rather than dressed up as biology.
Rotation history attaches to the ground, not the bed, so this is what the planner remembers about this patch after the guild comes out.
This is a claim the planner refuses to enforce — recorded here with what is actually known, rather than dropped.
What is actually known: A guild asserts a mechanism between its members. A culinary bundle asserts only that you will want these things in the same bowl. Both are legitimate. Only one is a polyculture.
Evidence: settled without a trial - definition.