---
license: cc-by-4.0
pretty_name: MiniWeb agent trajectories
task_categories:
- other
tags:
- web-agents
- browser-agents
- trajectories
- benchmark
size_categories:
- 10K<n<100K
---

# MiniWeb agent trajectories

Every agent episode behind the results of *Back to Basics: A Skill-Centric Approach to Generalist Web Agents*:
12,245 episodes in 62 runs, with 375,447 screens. Browse them at
**[minhphd.github.io/miniweb/trajectories.html](https://minhphd.github.io/miniweb/trajectories.html)**.

| Benchmark | In the paper | Agents or arms | Runs | Episodes |
|---|---|---|---|---|
| MiniWeb, all 369 tasks | Tab. 2 | 10 | 10 | 3,689 |
| MiniWeb held-out tasks | Tab. 3 | 5 | 15 | 930 |
| MiniWeb single primitives | Fig. 7 | 4 | 12 | 1,236 |
| WebArena-Lite | Tab. 3 | 5 | 15 | 2,310 |
| WebVoyager | Tab. 3 | 5 | 5 | 2,680 |
| Online-Mind2Web | Tab. 3 | 5 | 5 | 1,400 |

Benchmarks: [MiniWeb](https://huggingface.co/datasets/sparklabuofu/MiniWeb), WebArena-Lite, WebVoyager and
Online-Mind2Web. Each episode's success is the one the paper counts: the VLM judge on all 369 MiniWeb tasks (Tab. 2),
the task verifier on MiniWeb's held-out tasks and single primitives, WebArena's evaluator, the WebVoyager judge and
WebJudge on Online-Mind2Web.

## Layout

```
index.json                    benchmarks and runs: arm, seed, episodes, success rate, screens
runs/<run>/index.json         the run's episodes: task, instruction, outcome, step and screen counts
runs/<run>/<episode>.json     one episode
```

A run id is `<benchmark>/<arm>[/s<seed>]`, for example `heldout/miniwebagent/s1`. An episode file holds the task and
its instruction, `success`, `graded_by`, the grader's `verdict`, per-primitive verdicts with the judge's reasons
(`primitives`, where the run was judged per primitive), the planner's subtasks (`plan`), and `steps`: each with the
page URL, the action, the action's result or error, the agent's reasoning, and `image`, an index into `images` (WebP
data URIs, 960 px wide).

## Screens

Screens are the ones the agent saw, where the run kept them. The planner harness on MiniWeb kept none; for those
22,789 steps the screen is redrawn on MiniWeb's sites. On the held-out tasks it is rendered from the page HTML
the recorder saved before the step, with the sites' own stylesheets and images (`redrawn: true`): close to what the
agent saw, though scripts do not run and pages built on the fly may miss an image. On the single-primitive tasks the
recorder saved no HTML, so the screen is a fresh visit to the step's address (`redrawn: "url"`): the right page, but
without typed text or other in-page state. WebArena-Lite planner runs kept neither, so their steps have no screen.

## Privacy

Text went through the same scrubbing as the MiniWeb release: annotator names appear only as pseudonyms, the hosts
the benchmarks ran on are replaced (`http://shopping.webarena`, `http://map.webarena`, ...), and the eval machines'
network addresses and file paths are masked (`x.x.x.x`, `/downloads`). Screens of pages that print the visitor's
address (search engines' unusual-traffic pages, error pages with the client IP, an ad page that geolocates the
visitor) are withheld: 452 steps, marked `withheld: true`. Live websites saw the eval machines' location,
so some pages show it. The MiniWeb sites are synthetic; the live-web runs visited public websites.

## Citation

```bibtex
@misc{miniweb2026,
  title  = {Back to Basics: A Skill-Centric Approach to Generalist Web Agents},
  author = {Pham-Dinh, Minh and Ishmam, Md Farhan and Yupanqui, Hernan and Joarder, Reaz Hassan and Marino, Kenneth},
  year   = {2026}
}
```