registry / @chem-x/create-chemx / 26.9.25-1337

@chem-x/create-chemx@26.9.25-1337

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

AI Security Review

scanned 11d ago · by lpm-firewall-ai

The active postinstall path mutates consumer editor MCP configuration without an observed consent gate. The inspected behavior supports a warning for first-party agent integration setup, not a publish block.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

npm install of this package in a consumer project.

Impact

The consumer project gains an MCP server configuration for this package; the inspected evidence does not establish credential exposure or another active attack.

Mechanism

The hook calls the MCP installer, which creates or updates .cursor/mcp.json and .vscode/mcp.json without an observed consent check.

AI rationale

Evidence

package.jsoncli/postinstall.jscli/mcp/installer.js.cursor/mcp.json.vscode/mcp.json

Decision evidence

public snapshot

AI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package postinstall hook runs cli/postinstall.js, which targets the consuming project and calls the MCP configuration installer.
The installer creates or updates the consumer's .cursor/mcp.json and .vscode/mcp.json to register this package's MCP server.
The separate pillars wizard writes AGENTS.md and .cursorrules only when explicitly invoked; this behavior is not the postinstall path.

Evidence against

The observed setup registers this package's own MCP server; inspected source does not establish credential collection, exfiltration, or a remote payload.
No user confirmation gate was found in the postinstall path before the MCP configuration writes.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 312 file(s), 1.59 MB of source, external domains: 127.0.0.1, api.github.com, chemicalx.xophz.com, example.com, fallback.com, github.com, img.shields.io, mycompassconsulting.com, randomsite.com, reports.chemicalx.xophz.com, www.w3.org

Source & flagged code

10 flagged

package.jsonView file

Lines 33-73json

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

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

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

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

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

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

39 "./patcher": "./cli/patcher.js",

40 "./errors": "./cli/errors/index.js"

41 },

42 "scripts": {

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

44 "bench": "node benchmarks/run-benchmark.mjs",

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

46 "dev:ui": "node cli/index.js ui --dev",

47 "dev:ui:watch": "node --watch --watch-path=cli cli/index.js ui --dev",

48 "test": "node --test cli/audit/*.spec.js cli/mcp/*.spec.js cli/build/*.spec.js cli/team/*.spec.js cli/errors/*.spec.js cli/*.spec.js",

49 "check:frameworks": "node scripts/check-framework-generation.mjs",

50 "prepublishOnly": "node scripts/check-framework-generation.mjs",

51 "typecheck": "tsc --noEmit",

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

53 "postinstall": "node cli/postinstall.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L53

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L53

54 "chemx:mcp": "chemx mcp",

55 "chemx:verify": "chemx verify",

56 "chemx:test": "chemx test",

57 "chemx:typecheck": "chemx typecheck"

58 },

59 "dependencies": {

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

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

62 "@babel/types": "^7.29.8"

63 },

64 "devDependencies": {

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

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

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

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

69 "chemx": "26.9.20-408",

70 "react": "^18.3.1",

71 "react-dom": "^18.3.1",

72 "typescript": "^5.9.3"

73 }

cli/errors/errors.spec.jsView file

Lines 7-47javascript

7 maskSensitiveTokens,

8 normalizeHomePath,

9 sanitizeText,

10 sanitizeStackTrace

11} from './sanitizer.js';

12import {

13 buildIssueTitle,

14 buildIssueBody,

15 buildIssueWebUrl,

16 formatIssueContent

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/build/executor.jsView file

Lines 1-31javascript

1import { spawn } from 'node:child_process';

3export const executeBuild = (command, cwd = process.cwd(), options = {})

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/mcp/installer.jsView file

Lines 1-21javascript

1import fs from 'node:fs';

2import path from 'node:path';

3import os from 'node:os';

4import { syncAntigravityMcpSchemas } from './antigravity.js';

cli/pillars-wizard.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. st pick = usegum ? gumchoose(choices, 'select architectural pillars configuration') : await promptquestion('select pillars: [1=recommended, 2=strict, 3=custom, 4=minimal, 5=none] (default: 1): '); if (pick && (pick.startswith('2.') || pick === '2')) { selectedpresetkey = 'strict'; selectedpillarids = [...pillar_presets.strict.pillars]; } else if (pick && (pick.startswith('3.') || pick === '3')) { selectedpresetkey = 'custom'; for (const pillar of pillars) { const defaultchoice = pillar_presets.recommended.pillars.includes(pillar.id) ? 'y/n' : 'y/n'; const isdefaultyes = defaultchoice === 'y/n'; const answer = a

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/pillars-wizard.jsView on unpkg

scripts/pre-commit.shView file

•path = scripts/pre-commit.sh kind = build_helper sizeBytes = 5153 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

scripts/pre-commit.shView on unpkg

Source & flagged code

10 flagged · loading source

package.jsonView file

•scripts.postinstall = node cli/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node cli/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

cli/errors/errors.spec.jsView file

27patternName = github_pat severity = critical line = 27

Critical

Critical Secret

Package contains a critical-looking secret pattern.

cli/errors/errors.spec.jsView on unpkg · L27

Findings

3 Critical5 High5 Medium5 Low

CriticalCritical Secretcli/errors/errors.spec.js

CriticalAi Agent Control Hijackcli/mcp/installer.js

CriticalSecret Patterncli/errors/errors.spec.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processcli/audit-preflight-git.js

HighShellcli/build/executor.js

HighSame File Env Network Executioncli/license.js

HighTrigger Reachable External Ai Agent Control Surface Mutationcli/pillars-wizard.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumShips Build Helperscripts/pre-commit.sh

Affected versions and remediation

This report applies to @chem-x/create-chemx@26.9.25-1337.

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

Review the evidence and your use of @chem-x/create-chemx@26.9.25-1337 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 06:05:26.905Z (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

More from @chem-x

Behavioral surface

Related packages

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Source & flagged code