Scenario Studio

What it does

Example prompts

• “/scenario-studio”

Requirements

• Python 3

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

1. 1Create an application-owned scenario directory and put a scenario.py in
2. 2Select a map source: map.net.xml/another .net.xml for SUMO, map.xodr
3. 3Define named traffic, missions, and optional social/bubble/history metadata.
4. 4Call gen_scenario(..., output_dir=scenario_dir, seed=). Set the
5. 5Validate the source and then the generated build/ tree. Build assets are
6. 6Before simulation, ensure the selected engine is compatible with the map and

What it can do on your machine

Read from SKILL.md and the folder at commit ac3fe1a. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  Ships 2 files in scripts/ (Python), which the agent can run.

  Shell commands in SKILL.md call:

  • python

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Scenario Studio loads about 1.5k tokens when it runs, and up to ~8.8k if it reads all its reference files. Until then it costs about 85 tokens; SKILL.md has 579 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~85

When it runs · the whole SKILL.md, loaded when a task matches

~1.5k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~8.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); the scripts in this folder are not scanned.

SKILL.md

The full file from VectorSpaceLab/AREX-Skill at commit ac3fe1a, republished under its MIT licence (© VectorSpaceLab). 579 words, ~1,538 tokens.

name

scenario-studio

description

Define, generate, inspect, and troubleshoot SMARTS scenarios from supported maps, traffic, missions, social agents, bubbles, surface patches, traffic histories, and metadata. Use this route when the task is scenario DSL or generated scenario layout; route live SUMO/TraCI, Envision replay, or environment lifecycle elsewhere.

disable-model-invocation

true

metadata.disco-role

operating

license

MIT

from pathlib import Path
from smarts.sstudio import gen_scenario, types as t

root = Path("my_scenario").resolve()
car = t.TrafficActor(name="car")
scenario = t.Scenario(
    map_spec=t.MapSpec(source=str(root / "map.net.xml")),
    traffic={"background": t.Traffic(
        engine="SUMO",
        flows=[t.Flow(
            route=t.Route(begin=("edge_in", 0, "random"),
                          end=("edge_out", 0, "max")),
            rate=60, begin=0, end=60, actors={car: 1.0},
        )]
    )},
    ego_missions=[t.Mission(t.Route(
        begin=("edge_in", 1, 10), end=("edge_out", 1, "max")
    ))],
)
gen_scenario(scenario, root, seed=42)

python /path/to/skills/disco/smarts/sub-skills/scenario-studio/scripts/validate_scenario_layout.py \
  --scenario /absolute/path/to/my_scenario --require-build

python /path/to/skills/disco/smarts/sub-skills/scenario-studio/scripts/generate_minimal_scenario.py \
  --map /absolute/path/to/map.net.xml --output /absolute/path/to/out --seed 42

© VectorSpaceLab, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 7 other files (scripts, references) in skills/repositories/repo-skills/smarts/sub-skills/scenario-studio of VectorSpaceLab/AREX-Skill.

• SKILL.md
• references/api-reference.md
• references/data-formats.md
• references/maps-and-traffic.md
• references/troubleshooting.md
• references/workflows.md
• scripts/generate_minimal_scenario.py
• scripts/validate_scenario_layout.py

Open the folder on GitHubat commit ac3fe1a