registry / @chemx/starter-kit / 26.10.8-344

@chemx/starter-kit@26.10.8-344

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

AI Security Review

scanned 5d ago · by lpm-firewall-ai

The postinstall hook performs unprompted first-party agent configuration, including a global Gemini configuration update. The source supports warning about lifecycle-driven agent setup, but does not establish broader control-surface abuse or a separate concrete attack.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Installing the package through npm runs its postinstall hook.

Impact

Agents may gain access to this package’s MCP tools after installation without a separate user-invoked setup step.

Mechanism

The hook calls the MCP installer, which writes project configuration and updates Gemini and Antigravity MCP configuration, schemas, and instructions.

AI rationale

Evidence

package.jsoncli/postinstall.jscli/mcp/installer.jscli/mcp/antigravity.js.cursor/mcp.json.vscode/mcp.json~/.gemini/config/mcp_config.json~/.gemini/antigravity/mcp/chemical-x

Decision evidence

public snapshot

AI called this Suspicious at 87.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

package.json runs cli/postinstall.js during postinstall.
The hook calls installAllMcpConfigs for the consumer directory without a consent prompt.
The installer writes project MCP configuration and registers a server in the home-directory Gemini configuration.
It also writes Antigravity tool schemas and instructions, enabling this package’s MCP integration.
The configured server runs this package’s local CLI when available, with an npm exec fallback.

Evidence against

The inspected setup registers the package’s own chemical-x MCP server and product schemas; the reviewed installation path showed no credential transfer or unrelated network recipient.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 260 file(s), 1.37 MB of source, external domains: api.github.com, api.local, chemicalx.xophz.com, fallback.com, github.com, img.shields.io, mycompassconsulting.com, reports.chemicalx.xophz.com, www.w3.org

Source & flagged code

14 flagged

package.jsonView file

Lines 36-76json

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

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

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

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

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

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

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

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

44 },

45 "scripts": {

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

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

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

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

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

51 "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",

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

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

54 "typecheck": "tsc --noEmit",

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

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

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L56

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L56

57 "chemx:mcp": "chemx mcp",

58 "chemx:verify": "chemx verify",

59 "chemx:test": "chemx test",

60 "chemx:typecheck": "chemx typecheck"

61 },

62 "dependencies": {

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

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

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

66 "@chemx/x-atoms": "26.10.8-285"

67 },

68 "devDependencies": {

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

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

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

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

73 "@vue/test-utils": "^2.5.1",

74 "chemx": "file:.",

75 "react": "^18.3.1",

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

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';

scripts/pre-commit.shView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = scripts/pre-commit.sh matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

scripts/pre-commit.shView on unpkg

•path = scripts/pre-commit.sh kind = build_helper sizeBytes = 8215 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

scripts/pre-commit.shView on unpkg

cli/audit/ai-slop-detector.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 2

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

cli/audit/ai-slop-detector.js#virtual:normalized:round1View on unpkg

cli/audit/social-git.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/audit/social-git.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

cli/audit/social-git.jsView on unpkg

cli/errors/publisher.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/errors/publisher.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

cli/errors/publisher.jsView on unpkg

cli/navigator-share.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/navigator-share.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

cli/navigator-share.jsView on unpkg

Source & flagged code

14 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/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

1 Critical11 High5 Medium5 Low

CriticalAi Agent Control Hijackcli/mcp/installer.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processcli/audit-preflight-git.js

HighShellcli/build/executor.js

HighSame File Env Network Executioncli/license.js

HighSemantic Analysis Limitedcli/audit/ai-slop-detector.js#virtual:normalized:round1

HighKnown Malware Source Similaritycli/audit/social-git.js

HighKnown Malware Source Similaritycli/license.js

HighKnown Malware Source Similaritycli/build/executor.js

HighKnown Malware Source Similaritycli/errors/publisher.js

HighKnown Malware Source Similaritycli/navigator-share.js

Affected versions and remediation

This report applies to @chemx/starter-kit@26.10.8-344.

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

Review the evidence and your use of @chemx/starter-kit@26.10.8-344 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: 2026-10-18 09:10:50.569Z (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 @chemx

Behavioral surface

Related packages

More from @chemx

Source & flagged code