registry / @xfive/chisel-ai-toolkit / 1.3.0

@xfive/chisel-ai-toolkit@1.3.0

Chisel AI toolkit — skills, rules and reference docs for AI coding agents working on Chisel WordPress themes

AI Security Review

scanned 6d ago · by lpm-firewall-ai

The automatic postinstall setup writes first-party agent instructions and a project-scoped Claude hook without an installation-time consent check. The inspected behavior supports a warning for agent extension lifecycle risk, but does not establish a concrete attack or malicious intent.

Static reason

High-risk behavior combination matched malicious policy.

Trigger

Installing the package runs its postinstall hook; a detected Chisel theme is required for installation to proceed.

Impact

Project agents may receive new instructions and run the installed guard when editing files.

Mechanism

The installer writes package-provided skills and instructions into the project and adds a hook to its Claude settings.

AI rationale

Evidence

package.jsoninstall.jslib/emit.jslib/settings.jsuninstall.js.claude/skills/CLAUDE.mdAGENTS.md.claude/settings.json

Decision evidence

public snapshot

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

Evidence for warning

The postinstall hook runs install.js automatically during package installation.
The installer selects Claude and Agents by default and invokes their emitters for the detected theme root.
The Claude emitter adds package skills to the theme’s .claude directory and installs a guard hook in Claude settings.
The hook is project-scoped at .claude/settings.json and runs on editing tools.
Uninstall removes the package’s managed instructions and its hook while retaining other settings.
The inspected source establishes automatic first-party agent setup, but no credential transfer, remote endpoint, or separate concrete attack.

Evidence against

The installer supports a dry-run option, but that option is not enabled by the postinstall script.
The guard hook is installed in project settings and has a defined removal path.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystem

Supply chain

HighEntropyStrings

Source & flagged code

6 flagged

package.jsonView file

Lines 5-39json

5 "license": "MIT",

6 "type": "commonjs",

7 "repository": {

8 "type": "git",

9 "url": "git+https://github.com/xfiveco/chisel-ai-toolkit.git"

10 },

11 "publishConfig": {

12 "access": "public"

13 },

14 "files": [

15 "skills/",

16 "rules/",

17 "hooks/",

18 "lib/",

19 "install.js",

20 "uninstall.js",

21 "verify.js",

22 "README.md"

23 ],

24 "scripts": {

25 "postinstall": "node install.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L25

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L25

26 "install-toolkit": "node install.js",

27 "validate": "node scripts/validate-skills.js",

28 "verify": "node verify.js",

29 "prepublishOnly": "node scripts/validate-skills.js"

30 },

31 "bin": {

32 "chisel-ai-toolkit": "./install.js",

33 "chisel-verify": "./verify.js"

34 },

35 "engines": {

36 "node": ">=20"

37 }

38}

•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

install.jsView file

Lines 1-21javascript

1#!/usr/bin/env node

2"use strict";

4const path = require("node:path");

6const pkg = require("./package.json"

uninstall.jsView file

•Runtime or CLI code links a write operation to an explicit external AI-agent control path: #!/usr/bin/env node "use strict"; const fs = require("node:fs"); const path = require("node:path"); const pkg = require("./package.json"); const { resolveroots } = require("./lib/roots"); const manifest = require("./lib/manifest"); const { begin, end } = require("./lib/emit"); const settings = require("./lib/settings"); const managed_memory_files = new set(["claude.md", "agents.md"]); function stripmanagedblock(content) { const start = content.indexof(begin); const end = content.indexof(end); if (start === -1 || end === -1 || end < start) return content; return (content.slice(0, start) + content.slice(end + end.length)).replace(/\n{3,}/g, "\n\n").trimstart(); } function pruneemptydirs(di

High

External Ai Agent Control Surface Mutation

Runtime or CLI source writes behavior-bearing configuration into a user or project AI-agent control surface.

uninstall.jsView on unpkg

lib/emit.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. ", ".yml", ".yaml"]); function copytree(source, target, vars, record) { fs.mkdirsync(target, { recursive: true }); for (const entry of fs.readdirsync(source, { withfiletypes: true })) { const from = path.join(source, entry.name); const to = path.join(target, entry.name); if (entry.isdirectory()) { copytree(from, to, vars, record); } else if (text_extensions.has(path.extname(entry.name))) { fs.writefilesync(to, render(fs.readfilesync(from, "utf8"), vars)); record(to); } else { fs.copyfilesync(from, to); record(to); } } } function splicemanagedblock(existing, body) { const block = `${begin}\n${body.trim()}\n${end}`;

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.

lib/emit.jsView on unpkg

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node install.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 install.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

install.jsView file

Findings

1 Critical4 High3 Medium4 Low

CriticalAi Agent Control Hijackinstall.js

HighInstall Time Lifecycle Scriptspackage.json

HighExternal Ai Agent Control Surface Mutationuninstall.js

HighTrigger Reachable External Ai Agent Control Surface Mutationlib/emit.js

HighSemantic Analysis Limitedpackage.json

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @xfive/chisel-ai-toolkit@1.3.0.

See all versions of @xfive/chisel-ai-toolkit for other recorded verdicts.

Review the evidence and your use of @xfive/chisel-ai-toolkit@1.3.0 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: 2026-10-17 04:07:02.477Z (UTC).

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