---
license: bsd-3-clause
pretty_name: Workbench (OpenEnv)
tags:
- openenv
- reinforcement-learning
- agents
- tool-use
- software-engineering
- finance
configs:
- config_name: tasks
  data_files:
  - split: train
    path: data/tasks.jsonl
---

# Workbench (v4 task set: finance traps + protected reward)

An OpenEnv environment that trains **workspace habits** in a `run_bash` / `submit` sandbox, built for [OpenEnv Arena](https://openenvarena-arena.hf.space/).

- **Source:** https://github.com/moarshy/workbench
- **Image:** `ghcr.io/moarshy/workbench:v4`
- **Notes and pre-registration:** https://github.com/moarshy/openenv-arena-notes/blob/main/versions/v8-workbench-v4.md

## Tasks (9)
**Finance (3), new in v4**
- **loans-easy / medium / hard.** Month-end loan-loss provisions: stage loans by days past due, apply provision rates, write `provisions.json`.
  - **Late caveat:** a dated risk-committee memo changes a rate (superseded on hard) or declares returned payments.
  - **False premise:** the CFO names three "written-off" loans, and usually 1–2 are not in the register. Follow the records and list those loans as discrepancies. In 25% of instances the CFO is right.
  - **Hard adds:** a future-dated memo, payments recorded after the reporting date, and FX.

**Software (3)**
- **pyrepo-bug1 / implement.** Real bugs in vendored toolz / boltons / tabulate / inflection, graded by the complete pristine test suite.
- **repair-medium.** A synthetic billing package with SPEC and CHANGELOG, and hidden tests.

**Office (1)**
- **expenses-easy.** A policy audit.

**Industrial (2)**
- **reflow-hard.** A reflow-oven audit.
- **downtime-medium.** A sensor-log downtime audit.

## Reward
- **0** if any protected check fails: broken output schema, a changed input file, a test that passed before now failing, an edited test, or the decoy "fixed".
- Otherwise **full success = 0.9 + 0.1 × steps_left / 12**.
- Otherwise **partial = 0.5 × share of checks passed**.

The reward always lies in [0, 1].

## Calibration
Qwen3.8-27B, thinking off, 12,288-token completion budget, 8 episodes per task, counting full solves:

| task | strict JSON | lenient JSON |
|---|---|---|
| pyrepo-bug1 | 1/8 | 3/8 |
| pyrepo-implement | 2/8 | 1/8 |
| repair-medium | 2/8 | 2/8 |
| loans-easy | 0/8 | 5/8 |
| loans-medium | 0/8 | 5/8 |
| loans-hard | 0/8 | 4/8 |
| expenses-easy | 1/8 | 3/8 |
| reflow-hard | 3/8 | 0/8 |
| downtime-medium | 2/8 | 3/8 |

Strict failures are almost all format: prose before the JSON, unescaped quotes, `<tool_call>` tags.

## Licences
The vendored libraries keep their own licences: toolz and boltons are BSD-3-Clause, tabulate and inflection are MIT.