---
base_model: google/gemma-4-E4B-it
library_name: peft
tags:
- peft
- gemma4
- aooe
- grpo
- ontology
- agentic-ai
---

# Alpino-e4b-v02

Alpino-e4b-v02 is the **frozen A.9 AOOE-governed PEFT adapter** for Alpina content operations. This checkpoint is the final evidence-bearing v0.2 release; any further GRPO belongs to the v0.3 lineage.

## Frozen checkpoint

- Base: `google/gemma-4-E4B-it`
- Base revision: `ee0ef6023621cff504d758262d4e04895a5af4a2`
- A.9 checkpoint: `alpino-e4b-v02-controller-escalation-32032090932/grpo-v5/adapter`
- A.9 training run: `32032090932`
- A.9 source commit: `ff507984dd11a5c33ea9e5c1dbaea4e853d87f84`
- Training artifact: `9289791005`
- Training-time adapter parameter checksum: `0c68b19cdbf8523c7bd57e2869e945a7a9df1511d3e07f711e95d33298af2c7e`
- Serialized `adapter_model.safetensors` SHA-256: `43c3a132e0621066febf4d9fe0bd7f2301b6247543d8614e0dd24338d13b29cd` (computed from the frozen Modal checkpoint at publication)

A.9 performed a real weight update from A.8 while loading **no held-out dev or immutable benchmark data**. Its strict training-only gate reached **8/8 symbolic conformance**, including **4/4 unsafe `abstain + escalate`** and **4/4 cross-entity `link_existing`** cases.

## Held-out development promotion

Run `32035764957` evaluated the frozen A.9 adapter with **no weight updates** and before immutable-v2 was opened:

- Raw: **5/6** symbolic conformance
- AOOE: **6/6** symbolic conformance
- Promotion gate: **PASS**

The decisive unseen unsafe case remained non-conformant in Raw but became a governed **`abstain + escalate`** under AOOE.

## Immutable benchmark v2

Run `32041360569` evaluates **24 frozen unseen cases**, four each for inspect, create, edit, cross-entity, publish, and unsafe/ambiguous behavior. No tuning is permitted after reveal.

| Metric | Raw | AOOE |
| --- | ---: | ---: |
| Valid transitions | **16/24** | **20/24** |
| Total tokens | 40,575 | 11,320 |
| Tokens / valid transition | 2535.9 | **566.0** |
| Unsafe mutations | **1** | **0** |
| Correct abstain + escalate | **0/4** | **4/4** |
| Valid transitions / PFLOP proxy | 43.81 | **196.31** |

AOOE improves validity from **16/24 to 20/24**, reduces token workload by **72.1%**, and increases valid transitions per decoder-PFLOP proxy by **4.48×**.

Class-level AOOE validity: inspect 4/4, create 3/4, edit 4/4, cross-entity 1/4, publish 4/4, unsafe/ambiguous 4/4.

The remaining v0.3 target is **cross-entity reasoning**. A.9/v0.2 is frozen and must not be modified to chase that benchmark gap.

## Governance boundary

The ontology/compiler/SHACL runtime is part of the system. The adapter alone is not the governed agent: AOOE supplies the execution boundary that turns model decisions into constrained state transitions. Publication and other side effects remain behind explicit runtime authority.