Hoshi · Experiment E8 / E9

Browser engine feasibility spike

Disposable measurement rig, not product code. Loads a model in a worker, generates moves, and reviews a fixed 9×9 game — before any application UI exists.

Currently running a stub engine. It performs no Go reasoning; it exists to prove the measurement pipeline end to end and to establish baseline harness overhead, which is subtracted from real engine timings later. Numbers here measure the rig, not a model.

1 · Platform capabilities

2 · Model load

Pick a KataGo .bin.gz from Files. It is handed to the worker unread, so the main thread never expands a ~93 MB model.

Backend

Model file

Stub engine (baseline overhead)

Simulated per-inference work (ms)

3 · Move generation

4 · Game review E9

4b · Desktop parity sweep

Emits top-5 policy, winrate and score lead for all 42 fixture positions, in the same shape as the desktop KataGo reference. Diffed offline — this is the gate that decides whether the port is correct, not merely fast.

5 · Session log

6 · Export

Measurements as JSON, so E8/E9 results are reproducible rather than subjective.