@doist/twist-cli@3.0.9

TypeScript CLI for Twist

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The package has a real unconsented install-time AI-agent extension update surface, but it is scoped to pre-existing package-named skill files and contains no demonstrated remote payload, self-dependency, or exfiltration chain. This warrants a warning rather than a publication block.

Static reason

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

Trigger

Installing the package with lifecycle scripts enabled, after a Twist CLI skill already exists.

Impact

Can silently change instructions and capabilities available to configured AI agents.

Mechanism

Automatic lifecycle update of existing agent skill files.

AI rationale

Evidence

package.jsondist/postinstall.jsdist/lib/skills/update-installed.jsdist/lib/skills/index.jsdist/lib/skills/create-installer.js~/.claude/skills/twist-cli/SKILL.md~/.codex/skills/twist-cli/SKILL.md~/.cursor/skills/twist-cli/SKILL.md~/.gemini/skills/twist-cli/SKILL.md~/.pi/skills/twist-cli/SKILL.md~/.agents/skills/twist-cli/SKILL.md

Decision evidence

public snapshot

AI called this Suspicious at 90.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

Installation runs a postinstall script.
The postinstall silently updates every previously installed agent skill.
The updater targets Claude, Codex, Cursor, Gemini, Pi, and a universal agent directory.
Skill updates overwrite SKILL.md in home-directory agent configuration paths.

Evidence against

Updates are limited to an already-existing twist-cli skill file; they do not create a new foreign agent directory.
The embedded skill content is local package data, with no remote payload retrieval.
No self-dependency, obfuscation, credential exfiltration, or install-time shell/network execution was found.
The flagged editor process runs only when a user invokes the CLI editor flow.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

Source & flagged code

7 flagged

package.jsonView file

Lines 1-37json

2 "name": "@doist/twist-cli",

3 "version": "3.0.9",

4 "description": "TypeScript CLI for Twist",

5 "type": "module",

6 "main": "dist/index.js",

7 "bin": {

8 "tw": "dist/index.js"

9 },

10 "scripts": {

11 "build": "tsc -p tsconfig.build.json && chmod +x dist/index.js",

12 "dev": "tsc -p tsconfig.build.json --watch",

13 "start": "node dist/index.js",

14 "type-check": "tsc --noEmit",

15 "lint": "oxlint . --fix && oxfmt",

16 "lint:check": "oxlint . && oxfmt --check",

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

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L17

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L17

18 "check:skill-sync": "node scripts/check-skill-sync.js",

19 "sync:skill": "npm run build && node scripts/sync-skill.js",

20 "test": "vitest run",

21 "test:watch": "vitest",

22 "prepublishOnly": "npm run build && npm test"

23 },

24 "keywords": [

25 "twist",

26 "cli",

27 "messaging",

28 "doist"

29 ],

30 "author": "Ernesto García <ernesto@ernesto.dev>",

31 "license": "MIT",

32 "engines": {

33 "node": ">=24",

34 "npm": ">=11"

35 },

36 "repository": {

37 "type": "git",

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

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

package.jsonView on unpkg

scripts/check-skill-sync.jsView file

Lines 1-37javascript

1#!/usr/bin/env node

3/**

4 * Verifies that skills/twist-cli/SKILL.md is in sync with the generated

5 * skill content from src/lib/skills/content.ts.

6 *

7 * Requires `npm run build` to have been run first.

8 */

10import { readFile } from 'node:fs/promises'

dist/lib/skills/create-installer.jsView file

Lines 4-44javascript

4import { CliError } from '../errors.js';

5import { SKILL_FILE_CONTENT, SKILL_NAME } from './content.js';

6export function createInstaller(config) {

7 function getInstallPath

dist/lib/input.jsView file

•matchType = normalized_sha256 matchedPackage = @doist/twist-cli@3.0.8 matchedPath = dist/lib/input.js matchedIdentity = npm:QGRvaXN0L3R3aXN0LWNsaQ:3.0.8 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.

dist/lib/input.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = acd00388ab62c770 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @doist/twist-cli@3.0.8 matchedPath = dist/lib/input.js matchedIdentity = npm:QGRvaXN0L3R3aXN0LWNsaQ:3.0.8 similarity = 1.000 shingleOverlap = 22 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

dist/lib/input.jsView on unpkg

Source & flagged code

7 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

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

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

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

scripts/check-skill-sync.jsView file

Findings

1 Critical4 High5 Medium5 Low

CriticalAi Agent Control Hijackdist/lib/skills/create-installer.js

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limitedpackage.json

HighKnown Malware Source Similaritydist/lib/input.js

HighKnown Malware Source Fingerprint Signaturedist/lib/input.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirescripts/check-skill-sync.js

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowFilesystem

Low

Affected versions and remediation

This report applies to @doist/twist-cli@3.0.9.

See all versions of @doist/twist-cli for other recorded verdicts.

Review the evidence and your use of @doist/twist-cli@3.0.9 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: 2026-09-14 03:24:45.761Z (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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Runtime surface

Behavioral surface

Related packages

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Source & flagged code