Order arrived; first unit built has tested good and been programmed successfully. Pictures, BOM & schematic to be added soon.
Short & hacky, but I spent enough hours looking it over and improving it over a few days, so it ought to work !

Goals were to create an easy-to-prototype SOIC-8 wide/narrow to DIP-8 adapter for the ATtiny25/45/85 microcontroller family integrated with:
* an I©SP programming port using a keyed, shrouded header for IDC-type 6-pin ribbon cables, thus preventing reversed connections while easing re-programming (or attachment to other gadgets for I/O)
* a 5v LowDropOut regulator for more electrical reliability in rough service (e.g. damage to wires)
* an LED that won’t hamper programming, for power & heartbeat indication
* and a transistor driven output able to be wired as designed (or modifiable for other transistor types) for use in a 12v circuit which accepts 5v signals and tolerates 12v inputs

Application: virtual “button masher” with hybrid heartbeat power indicator LED - code not included, for now.

Known issues:
Mainly, there’s no mounting holes - neglected for reasons of size/cost - have to clip it in for securement & bolt that clip down to the enclosure it’s going into. Secondarily, that left end is seriously cramped and messy (though workable). Also, the tiny85’s label was left off the silkscreen (Name vs. Value would have to be manually moved to the other layer in Eagle).