registry / AI-agent control-surface risk / @twing/cli / 1.3.5

@twing/cli@1.3.5

AI Security Review

scanned 11d ago · by lpm-firewall-ai

The postinstall hook automatically mutates machine-wide AI-agent control surfaces during global installation, without a separate consent gate. This meets the policy for blocking unconsented lifecycle control-surface mutation.

Static reason

High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source

Trigger

Installing the package globally with npm, which runs its postinstall hook.

Impact

The package gains automatic execution through agent hook and plugin configuration across future sessions.

Mechanism

The hook invokes machine setup, which wires Claude and Codex hooks and installs an OpenCode plugin loader.

Policy narrative

A global npm install activates postinstall without a separate setup confirmation. That hook calls machine setup, which writes machine-wide Claude wiring, installs an OpenCode plugin loader, and wires Codex hooks. These changes create automatic agent execution paths across future sessions.

AI rationale

Evidence

package.jsonpostinstall.cjsdist/machine-setup.jsdist/resolve-hook.jsdist/opencode-plugin.jsdist/codex-hooks.js

Decision evidence

public snapshot

AI identified this as a dangerous AI-agent capability at 94.0% confidence with low false-positive risk.

Evidence for policy risk

package.json registers postinstall to run postinstall.cjs.
postinstall.cjs automatically runs machine setup for global npm installs.
machine setup writes machine-wide Claude resolver wiring, installs the OpenCode plugin, and wires Codex hooks.
OpenCode wiring writes a plugin loader into its auto-loaded plugin directory.
The resolver wiring adds entries for configured hook events to Claude settings.
The Codex trust function builds a trust block from matching Twing hooks and appends it to Codex configuration.

Evidence against

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 48 file(s), 467 KB of source, external domains: coordination-server.twing.dev, github.com, raw.githubusercontent.com

Source & flagged code

7 flagged

package.jsonView file

Lines 9-38json

9 "bin": {

10 "twing": "./dist/index.js"

11 },

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

13 "types": "./dist/index.d.ts",

14 "repository": {

15 "type": "git",

16 "url": "https://github.com/Twing-dev/twing-cli.git",

17 "directory": "packages/cli"

18 },

19 "files": [

20 "dist",

21 "postinstall.cjs",

22 "!dist/**/*.test.js",

23 "!dist/**/*.test.js.map",

24 "!dist/**/*.test.d.ts",

25 "!dist/**/*.test.d.ts.map"

26 ],

27 "scripts": {

28 "build": "tsc -b",

29 "postinstall": "node postinstall.cjs",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L29

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L29

30 "typecheck": "tsc --noEmit",

31 "test": "node --test dist/*.test.js dist/*/*.test.js"

32 },

33 "dependencies": {

34 "@twing/core": "^1.3.5",

35 "web-tree-sitter": "^0.26.12"

36 }

37}

dist/opencode-adapter.jsView file

Lines 1-32javascript

1/**

2 * OpenCode -> twing-hook adapter.

3 *

4 * OpenCode plugins run inside the long-lived OpenCode process, while the

5 * existing twing client contract is one JSON payload per short-lived hook

6 * process. Keeping the translation here means OpenCode shares the exact Go

7 * gate, auth recovery, daemon protocol, and target-file repo resolution

8 * Claude already uses instead of growing a second implementation.

9 *

10 * Copied verbatim to `~/.twing/opencode/adapter.mjs` by `opencode-plugin.ts`,

dist/test-support.jsView file

Lines 14-54javascript

14import * as fs from "node:fs";

15import * as os from "node:os";

16import * as path from

dist/machine-setup.jsView file

Lines 1-24javascript

1/**

2 * Machine wiring shared by the one-step install and `twing init --ghuser`.

3 *

4 * Both leave a machine in the same state: the resolver wired into

5 * `~/.claude/settings.json`, the OpenCode plugin installed, and nothing

6 * installed into `~/.twing/lib`. The coordinator picks the version, so the CLI,

Critical

Ai Agent Control Hijack

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

dist/machine-setup.jsView on unpkg · L4

7 * hook binary and daemon arrive lazily the first time a session opens a repo

8 * that uses twing -- and version recovery keeps them current from then on.

dist/codex-hooks.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 8

High

Semantic Analysis Limited

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

dist/codex-hooks.js#virtual:normalized:round1View on unpkg

dist/codex-hooks.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @twing/cli@0.2.26 matchedIdentity = npm:QHR3aW5nL2NsaQ:0.2.26 similarity = 0.459 summary = stored previous version shares package body but lacks this dangerous source file

High

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/codex-hooks.jsView on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node postinstall.cjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node postinstall.cjs

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

dist/opencode-adapter.jsView file

12*/ L13: import { spawn } from "node:child_process"; L14: import * as fs from "node:fs";

High

Child Process

Package source references child process execution.

dist/opencode-adapter.jsView on unpkg · L12

Findings

1 Critical5 High4 Medium4 Low

CriticalAi Agent Control Hijackdist/machine-setup.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/opencode-adapter.js

HighSame File Env Network Executiondist/test-support.js

HighSemantic Analysis Limiteddist/codex-hooks.js#virtual:normalized:round1

HighPrevious Version Dangerous Deltadist/codex-hooks.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

Low

Affected versions and remediation

This report applies to @twing/cli@1.3.5.

See all versions of @twing/cli for other recorded verdicts.

Avoid installing @twing/cli@1.3.5. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-10-11 21:26:41.376Z (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

Other AI-agent control-surface risk packages

Behavioral surface

Related packages

Other AI-agent control-surface risk packages

Source & flagged code