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@babylonjs-toolkit/agent@1.1.42: AI-agent control-surface risk | LPM Firewall

registry / @babylonjs-toolkit/agent / 1.1.42

@babylonjs-toolkit/agent@1.1.42

Installs the Babylon Toolkit Desktop Agent for Claude Code, Codex, GitHub Copilot, Gemini CLI and Antigravity.

AI Security Review

scanned 8d ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. Global npm installation automatically modifies foreign AI agents' global instructions and Codex network permissions without a separate consent gate.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Global npm installation with lifecycle scripts enabled.

Impact

Changes subsequent agent instructions and expands Codex network permissions across sessions.

Mechanism

The postinstall hook calls the installer, which resolves default global agent destinations, writes persona blocks, and enables Codex workspace network access.

Policy narrative

The global-install postinstall hook automatically runs installation with default settings. It targets multiple foreign agents' global instruction files and Codex configuration, prepending package instructions and enabling network access. Backups and the local-install guard limit damage but do not provide consent for these automatic control-surface changes.

AI rationale

Inspected source establishes unconsented postinstall mutation of foreign, global AI-agent control surfaces. This meets the blocking policy despite the package-aligned purpose and file backups.

Evidence

package.jsonscripts/postinstall.jslib/install.jslib/targets.jslib/paths.jslib/codex-config.jslib/persona.js~/.claude/CLAUDE.md~/.agents/AGENTS.md~/.codex/AGENTS.md~/.codex/config.toml~/.gemini/GEMINI.md

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

lib/bridge/service.jsView file

17Trigger-reachable persistence chain: scripts.postinstall -> scripts/postinstall.js -> lib/doctor.js -> lib/bridge/service.js L17: const path = require('path'); L18: const { spawnSync, spawn: nodeSpawn } = require('child_process'); L19: ... L25: /** What the service copy carries — the package minus the skills payload the bridge never reads. */ L26: const PACKAGE_PARTS = ['package.json', 'bin', 'lib']; L27: const BOOTSTRAP_ATTEMPTS = 5; ... L29: /** L30: * @typedef {{ code: number|null, stdout: string, stderr: string }} ExecResult L31: * @typedef {(file: string, args: string[]) => ExecResult} ServiceExec ... L276: fs.writeFileSync(registration, launchdPlist({ argv, path: pathEnv, home: deps.home, logFile: paths.logFile }), { mode: 0o644 }); L277: exec('launchctl', ['bootout', `gui/${uid}/${

High

Trigger Reachable Persistence

A manifest entrypoint or package-local install chain reaches persistence behavior.

lib/bridge/service.jsView on unpkg · L17

17const path = require('path'); L18: const { spawnSync, spawn: nodeSpawn } = require('child_process'); L19: ... L25: /** What the service copy carries — the package minus the skills payload the bridge never reads. */ L26: const PACKAGE_PARTS = ['package.json', 'bin', 'lib']; L27: const BOOTSTRAP_ATTEMPTS = 5; ... L29: /** L30: * @typedef {{ code: number|null, stdout: string, stderr: string }} ExecResult L31: * @typedef {(file: string, args: string[]) => ExecResult} ServiceExec ... L276: fs.writeFileSync(registration, launchdPlist({ argv, path: pathEnv, home: deps.home, logFile: paths.logFile }), { mode: 0o644 }); L277: exec('launchctl', ['bootout', `gui/${uid}/${LAUNCHD_LABEL}`]); // not loaded yet is fine L278: // `bootout` returns before launchd has finished tearing the old instance

Medium

Install Persistence

Source writes installer persistence such as shell profile or service configuration.

lib/bridge/service.jsView on unpkg · L17

lib/targets.jsView file

1Install-time code directly mutates a foreign AI-agent control surface: L20: default: true, L21: global: { skills: '~/.claude/skills', instructions: '~/.claude/CLAUDE.md' }, L22: project: { skills: '.claude/skills', instructions: 'CLAUDE.md' }, L23: }, ... L27: default: true, L28: global: { skills: '~/.agents/skills', instructions: '~/.agents/AGENTS.md' }, L29: project: { skills: '.agents/skills', instructions: 'AGENTS.md' }, L30: }, ... L34: default: true, L35: global: { skills: null, instructions: '~/.codex/AGENTS.md', config: '~/.codex/config.toml' }, L36: project: { skills: null, instructions: 'AGENTS.md', config: '.codex/config.toml' }, L37: }, Write operation from lib/bridge/config.js: L90: function writeSettings(settings, file = bridgeConfigPath()) { L91: fs.mkdirSync(path.dirname(fi

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

lib/targets.jsView on unpkg · L1

skills/bt-atlas/scripts/preview.pyView file

•path = skills/bt-atlas/scripts/preview.py kind = build_helper sizeBytes = 2478 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

skills/bt-atlas/scripts/preview.pyView on unpkg

Source & flagged code

6 flagged

package.jsonView file

Lines 15-46json

15 "url": "https://github.com/babylontoolkit/skills/issues"

16 },

17 "repository": {

18 "type": "git",

19 "url": "git+https://github.com/babylontoolkit/skills.git"

20 },

21 "license": "MIT",

22 "author": "Mackey Kinard",

23 "bin": {

24 "bt-agent": "bin/bt-agent.js"

25 },

26 "files": [

27 "skills",

28 "bin",

29 "lib",

30 "scripts",

31 "persona.md",

32 ".codex/config.toml"

33 ],

34 "scripts": {

35 "postinstall": "node scripts/postinstall.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L35

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L35

36 "deploy-all": "npm publish --access public",

37 "test": "node --test tests/*.test.js"

38 },

39 "engines": {

40 "node": ">=18"

41 },

42 "publishConfig": {

43 "access": "public"

44 }

45}

46

lib/bridge/service.jsView file

Lines 1-37javascript

1'use strict';

2

3/**

4 * The start-at-login service (D55). `bt-agent bridge --install-service` copies this zero-dependency

5 * package to `~/.babylon-toolkit/service/` (so the service never points into an ephemeral npx cache) and

6 * registers `node <service>/bin/bt-agent.js bridge --service` to start when the user logs in:

7 *

8 * macOS a launchd agent ~/Library/LaunchAgents/com.babylontoolkit.bridge.plist

9 * Linux a systemd user unit ~/.config/systemd/user/babylon-toolkit-bridge.service

10 * Windows a Startup-folder script %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup\babylon-toolkit-bridge.vbs

lib/targets.jsView file

Lines 1-21javascript

1'use strict';

2

3const { resolveTargetPath } = require('./paths');

4

5/**

6 * The install target matrix.

7 *

8 * Adding support for another AI client is one entry here — no other file changes.

9

skills/bt-atlas/scripts/preview.pyView file

•path = skills/bt-atlas/scripts/preview.py kind = build_helper sizeBytes = 2478 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

skills/bt-atlas/scripts/preview.pyView on unpkg