KOS_OP_ITEM

• Style: NOARG.

• Stack: [..., obj, key] → [..., value]. Get obj[key] with the object on the stack and the key on the stack.

• Cache: one KOS_CACHE_ITEM slot; the site elects a body for the container kind it first sees through the shared helper in eval/eval_item.c (see the items section of the VM reference).

• Compiler form: Emitted by compile/item; the compress pipeline folds the run of feeders (bare VAR and CONST loads) ahead of it into the rows that name them.

• Implementation: koskari/lib/opcode/ITEM.c