Sandbox Flow

What it does

When your agent uses it

• Documents & Office work in your project

Example prompts

• “/sandbox-flow”

Requirements

• Node.js

Workflow steps

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

1. 1import { … } from "@nodetool-ai/sandbox-flow/"; — the nodes.
2. 2import "@nodetool-ai/sandbox-nodetool/flow"; — the capability module.

What it can do on your machine

Read from SKILL.md and the folder at commit 58765d3. 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 1 file in scripts/ (JavaScript, from the files we listed), which the agent can run.

  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

Sandbox Flow loads about 1.1k tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 465 words of instructions outside code blocks.

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

~42

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

~1.1k

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 nodetool-ai/nodetool at commit 58765d3, republished under its AGPL-3.0 licence (© nodetool-ai). 465 words, ~1,110 tokens.

name

sandbox-flow

description

Call NodeTool nodes as typed async functions from sandbox code, one importable module per node namespace, with streaming and plain JavaScript control flow

import { concat } from "@nodetool-ai/sandbox-flow/nodetool.text";

const r = await concat({ a: "hello ", b: "world" });
return r.output;

import "@nodetool-ai/sandbox-nodetool/flow";
import { concat } from "@nodetool-ai/sandbox-flow/nodetool.text";

import "@nodetool-ai/sandbox-nodetool/flow";
import { agent } from "@nodetool-ai/sandbox-flow/nodetool.agents";

let text = "";
for await (const chunk of agent.stream({ objective: "Summarize the file" })) {
  text += chunk.chunk ?? "";
  if (text.length > 2000) break; // closes the stream; the node stops
}
return text;

import { take } from "@nodetool-ai/sandbox-flow/nodetool.control";

const kept = [];
for await (const { slot, value } of take.stream({ input_item: [1, 2, 3], n: 2 })) {
  if (slot === "output") kept.push(value);
}

import "@nodetool-ai/sandbox-nodetool/flow";
import { textToSpeech } from "@nodetool-ai/sandbox-flow/gemini.audio";

try {
  return await textToSpeech({ text: draft });
} catch (error) {
  return { error: String(error) };
}

const summaries = await Promise.all(
  documents.map((document) => summarizer({ text: document }))
);

© nodetool-ai, AGPL-3.0. 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 77 other files (scripts) in packages/sandbox-packs/sandbox-flow of nodetool-ai/nodetool.

• SKILL.md
• package.json
• sandbox/generated/gemini.audio.js
• sandbox/generated/gemini.image.js
• sandbox/generated/gemini.text.js
• sandbox/generated/gemini.video.js
• sandbox/generated/kie.dynamic_schema.js
• sandbox/generated/lib.audio.js
• sandbox/generated/lib.browser.js
• sandbox/generated/lib.charts.js
• sandbox/generated/lib.comfy.js
• sandbox/generated/lib.grid.js
• sandbox/generated/lib.image.channel.js
• sandbox/generated/lib.image.color.js
• sandbox/generated/lib.image.color_grading.js
• sandbox/generated/lib.image.draw.js
• sandbox/generated/lib.image.effects.js
• sandbox/generated/lib.image.enhance.js
• sandbox/generated/lib.image.filter.js
• … and 59 more

Open the folder on GitHubat commit 58765d3