# h2o decision front

The front of the h2o-lightning-4b decision seat on fv-ml1 (seat swap ordered by Prime 2026-10-12, through brokkr).
`front.py` sits in front of the vendor's **unmodified** `h2o_lightning_shim.py`, which sits in front of stock vLLM
0.30.0. It adds what the seat contract needs and the vendor stack lacks:

- **Admission** (infra-hermes's `tools/h2o-admission/admission_proxy.py` @ 30f36f2, logic unchanged): count every
  decision request with h2o's own tokenizer over the shim's own renders, and refuse over 32,000 tokens with 422 + the
  count. The shim would otherwise trim silently.
- **The seat's bearer token** on everything but `GET /health`, as intern-decision-serve has.
- **`/decide` and `/decide/shared` continuity** for albok-nemi's sensitivity judge: intern-decision-serve's own
  mapping (one Jev `choice` question per decision, calls of at most 16, fields `q`/`q1..qN`), re-keyed into the semif
  result shape (`results[i].native.probabilities[option id]`). `orderings` other than `none` → 422.
- **`/health`** with `model: {name, source, revision}`, which the judge stamps into its cache key.

`run.sh` runs the shim (loopback) and the front in one container (`python:3.12-slim`, host network). Stacks copy both
files into `conf/front/`: `stacks/h2o-eval` (TEMPORARY, GPU 3, :8034) today.

Verified 2026-10-12 1300 on the eval seat: 401 without the token; `/decide/shared` in the judge's shape; a planted
personal record → `personal` p_yes .911, a neutral note → .056 (n=1 each, smoke test only); 40,088 tokens → 422 with
the count; `/v1/systemone` passthrough with `_admission` counts; reachable from nh3-dev.