The stock firmware does not support AP-mode operation, but it’s not difficult to modify the firmware to do that.
The OSBee has not been discontinued yet — we still have some in stock and the product is active. I did not compile the OpenSprinkler firmware for OSBee — because OpenSprinkler 3.0 Latch is available, that runs the standard OpenSprinkler firmware. If you want to run OpenSprinkler firmware on OSBee, you may wants to search the forum or Google it because I feel someone has done that previously.