VivoVac Pty Ltd · OPALBLACK compute ledgerHG-OPAL-CBS-005 · programme note10 September 2026

Sequence and stopping rules

Cheap to try, cheap to be wrong

The value of this programme is not that it is likely to succeed. It is that the cost of finding out is small, the order of the work is fixed in advance, and every exit is written down before it is needed.

Nanoporous oxide sample and silicon processor together on a precision laboratory bench
Plate VIIThe end state, if the experiments allow it: a companion layer, never a replacement.

The order

What runs when

01

Now

Species, settled first

E1 runs before any device work. It is the cheapest experiment and the only one with the power to end the programme, so it goes first — not last, where a sunk-cost argument would be waiting.

02

On a positive E1

Device figures, with error bars

E2 and E3 run together: levels, write energy, speed, drift. Results are published internally in the same format whether they flatter the thesis or not, and the ledger sheet is updated the same week.

03

On usable device figures

One honest comparison

A single benchmark against published protonic and memristive devices on the one job we claim — holding analog weights. No comparison against CPUs, GPUs, or anything the device is not trying to be.

04

Only then

A partner who builds hardware

The route to usefulness runs through someone with a system to put this beside. Approaching them before stage 03 would mean asking them to take the physics on trust, which is the wrong way round.

The exits

Stopping rules, stated before the data

Negative species result

The compute programme ends. No computing claim about OPALBLACK is made again, on any sheet, in any register.

No repeatable switching

The analog-weight thesis is dropped and the sheets are rewritten to say so, rather than being softened into ambiguity.

Retention far below the workload

The target narrows in public to workloads that tolerate refresh, or the programme stops. It does not quietly acquire a vaguer target.

A better route appears

If someone else's device does this job better on a comparable manufacturing route, that is a result too. The point was the one per cent, not the oxide.

What success would actually look like

A layer, made by anodising, holding enough distinguishable analog levels at room temperature, stable for long enough to serve inference weights, sitting beside a silicon processor and taking one narrow job off it. Nothing larger is claimed, and nothing larger is needed for the arithmetic on the statement sheet to hold.