registry / AI-agent capability abuse / @chemx/create-chemx / 26.9.16-668

@chemx/create-chemx@26.9.16-668

Chemical X Protocol: Private drop-in architecture starter kit and capsule generator

AI Security Review

scanned 11d ago · by lpm-firewall-ai

The inspected agent configuration writes are reachable through an explicit setup wizard, so they warrant a warning under the agent capability policy. The declared postinstall target was absent from the inspected snapshot, and no concrete malicious behavior was established in the inspected source.

Static reason

One or more suspicious static signals were detected.; source closely matched a different package identity

Trigger

A user invokes the CLI hook or setup command and selects an installation option.

Impact

The configuration changes affect which commands agents are directed to use and make the package’s MCP server available to supported clients. No unconsented install-time agent mutation was established.

Mechanism

The wizard appends an AI-agent instruction block and registers a Chemical X MCP server in project or user-level configuration files.

AI rationale

Evidence

cli/index.jscli/installer.jscli/mcp/installer.jsAGENTS.md.cursor/mcp.json.vscode/mcp.json~/.gemini/config/mcp_config.json

Decision evidence

public snapshot

AI called this Suspicious at 84.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The CLI exposes setup through explicit hook and setup commands; the wizard presents the user with setup choices.
The setup wizard can append rules directing AI agents to use this package’s query command before broad searches.
The MCP installer writes this package’s server entry into project Cursor and VS Code configuration and may update Antigravity’s configuration.
The package manifest points postinstall to a script that was absent from the inspected package snapshot.
The named audit, terminal, license, scaffold and social Git files show project auditing, browser opening, license validation, user-directed scaffolding and Git metadata lookup; no concrete attack chain was established in these inspected excerpts.

Evidence against

The package declares a postinstall hook, but its referenced script was absent from the inspected snapshot, so the declared hook’s behavior could not be verified.
The setup command changes AI-agent instructions and server configuration, though the code exposes this through an explicit CLI wizard.

Behavioral surface

Source

Source & flagged code

7 flagged

package.jsonView file

Lines 30-69json

30 ".": "./cli/index.js",

31 "./audit": "./cli/audit.js",

32 "./build": "./cli/build.js",

33 "./search": "./cli/search.js",

34 "./mcp": "./cli/mcp/index.js",

35 "./reader": "./cli/reader.js",

36 "./patcher": "./cli/patcher.js"

37 },

38 "scripts": {

39 "publish:both": "node scripts/publish-both.mjs",

40 "test": "node --test cli/audit/*.spec.js cli/mcp/*.spec.js cli/*.spec.js",

41 "typecheck": "tsc --noEmit",

42 "create-capsule": "node cli/index.js",

43 "audit": "node cli/index.js audit",

44 "ci:audit": "node cli/index.js audit --ci --dir=cli",

45 "chemx": "node cli/index.js",

46 "q": "node cli/index.js q",

47 "search": "node cli/index.js search",

48 "mcp": "node cli/index.js mcp",

49 "install-mcp": "node cli/index.js install-mcp",

50 "postinstall": "node scripts/postinstall.mjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L50

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L50

51 "read": "node cli/index.js read",

52 "patch": "node cli/index.js patch"

53 },

54 "dependencies": {

55 "@babel/parser": "^7.29.8",

56 "@babel/traverse": "^7.29.8",

57 "@babel/types": "^7.29.8",

58 "react": "^18.3.1",

59 "react-dom": "^18.3.1"

60 },

61 "devDependencies": {

62 "@types/babel__traverse": "^7.28.0",

63 "@types/node": "^22.20.2",

64 "@types/react": "^18.3.31",

65 "@types/react-dom": "^18.3.7",

66 "typescript": "^5.9.3"

67 }

68}

cli/audit-preflight-git.jsView file

Lines 1-21javascript

1import fs from 'node:fs';

2import { spawnSync } from 'node:child_process';

High

Child Process

Package source references child process execution.

cli/audit-preflight-git.jsView on unpkg · L1

4const SOURCE_FILE_PATTERN = /\.

cli/terminal.jsView file

Lines 1-30javascript

1import readline from "node:readline";

2import { spawnSync } from "node:child_process";

3import { formatChemicalXGradient, ANSI } from "./theme.js";

5export const openBrowser

cli/license.jsView file

Lines 1-23javascript

1import fs from 'node:fs';

2import path from 'node:path';

3import os from 'node:os';

4import { spawnSync } from 'node:child_process';

cli/scaffold.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. import fs from 'node:fs'; import path from 'node:path'; import { hasgum, guminput, promptquestion, renderbanner } from './terminal.js'; import { obtainlicensekey, fetchstarterkitfiles, loadlocalblueprintfiles } from './license.js'; export const runscaffold = async (projectname, rawargs = [], onrunaudit = null) => { renderbanner('chemical x: molecular architecture scaffolder (npm create chemx)'); const licensekey = await obtainlicensekey(rawargs, onrunaudit); let iscommunity = false; let files = {}; if (!licensekey) { process.stdout.write( '\n\x1b[38;2;98;201;255m⚡ chemical x: community edition (free)\x1b[0m\n' + 'the community version is free because

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

cli/scaffold.jsView on unpkg

cli/audit/social-git.jsView file

•matchType = package_source_clone_identity_mismatch matchedPackage = create-chemx@26.9.14-205 matchedPath = cli/audit/ai-slop-detector.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.9.14-205 similarity = 0.702 shingleOverlap = 40 summary = source files closely matched a different published package identity

High

Package Source Clone Identity Mismatch

Package source closely matches a different published package identity; review for dependency-confusion or copied-code abuse.

cli/audit/social-git.jsView on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.mjs

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

cli/audit-preflight-git.jsView file

1import fs from 'node:fs'; L2: import { spawnSync } from 'node:child_process'; L3:

High

Child Process

Package source references child process execution.

cli/audit-preflight-git.jsView on unpkg · L1

Findings

6 High4 Medium4 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processcli/audit-preflight-git.js

HighShellcli/terminal.js

HighSame File Env Network Executioncli/license.js

HighTrigger Reachable External Ai Agent Control Surface Mutationcli/scaffold.js

HighPackage Source Clone Identity Mismatchcli/audit/social-git.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to @chemx/create-chemx@26.9.16-668.

See all versions of @chemx/create-chemx for other recorded verdicts.

Review the evidence and your use of @chemx/create-chemx@26.9.16-668 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-10-12 06:42:50.043Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Related packages

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Behavioral surface

Related packages

More from @chemx

Source & flagged code