registry / AI-agent control-surface risk / @raditia/craftkit / 1.50.0

@raditia/craftkit@1.50.0

AI coding skills that auto-sync across Claude Code, Cursor, Gemini CLI, and Codex CLI

AI Security Review

scanned 14d ago · by lpm-firewall-ai

The postinstall hook automatically enables a setup flow that installs and runs an externally sourced shell installer and patches global agent configuration. This is a concrete install-time control-surface change, so the package warrants blocking.

Static reason

One or more suspicious static signals were detected.

Trigger

npm postinstall on macOS or Linux.

Impact

A package install can execute remotely sourced shell code and alter global agent configuration without an explicit setup command.

Mechanism

The lifecycle script enables setup mode; sync.sh installs RTK if absent, executes its remote installer through a shell when Homebrew is unavailable, then runs RTK's global auto-patch initialization. It also clones a skill when its expected files are missing.

Policy narrative

The automatic postinstall path sets setup mode and invokes sync.sh. That path conditionally downloads an installer from a remote repository and pipes it to a shell, then performs RTK global auto-patching; it also clones skill content into agent directories. This is unconsented install-time mutation of the consumer's agent setup, with remote code execution through the downloaded installer.

AI rationale

Evidence

package.jsonscripts/postinstall.shsync.sh

Network endpoints2

raw.githubusercontent.com/rtk-ai/rtk/refs/heads/master/install.shgithub.com/blader/humanizer.git

Decision evidence

public snapshot

AI identified this as a dangerous AI-agent capability at 96.0% confidence with low false-positive risk.

Evidence for policy risk

package.json runs scripts/postinstall.sh automatically during installation.
The postinstall script sets AGENTIC_SETUP=1 and runs sync.sh, activating ensure_tools.
When RTK is missing, sync.sh installs it through Homebrew or pipes an installer downloaded from raw.githubusercontent.com directly to a shell.
The same automatic path runs rtk init -g --auto-patch and clones a skill into the user's agent directories.

Evidence against

The package describes itself as tooling for syncing AI coding skills across agent platforms.
The downloaded RTK setup and skill installation are conditional on missing tools or files.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystem

Supply chain

HighEntropyStrings

ManifestNo manifest risk signals triggered.

scanned 11 file(s), 55.8 KB of source

Source & flagged code

7 flagged

package.jsonView file

Lines 1-26json

2 "name": "@raditia/craftkit",

3 "version": "1.50.0",

4 "description": "AI coding skills that auto-sync across Claude Code, Cursor, Gemini CLI, and Codex CLI",

5 "scripts": {

6 "postinstall": "bash scripts/postinstall.sh"

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L6

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L6

7 },

8 "engines": {

9 "os": ["darwin", "linux"]

10 },

11 "files": [

12 "rules/",

13 "skills/",

High

Suspicious Lifecycle Evidence

package.json runs scripts/postinstall.sh automatically during installation.

package.jsonView on unpkg · L5

14 "commands/",

15 "agents/",

16 "partials/",

17 "adapters/",

18 "hooks/",

19 "scripts/",

20 "sync.sh",

21 "install.sh",

22 "CHANGELOG.md"

23 ],

24 "keywords": [

25 "claude-code",

26 "cursor",

hooks/craftkit-read-cap.jsView file

Lines 1-33javascript

1#!/usr/bin/env node

2// CraftKit PreToolUse rewrite: an uncapped whole-file read gets a line cap.

3// `rtk hook claude` already rewrites `cat F` to `rtk read F`, but passes no flags at any

4// size, so a 2000-line file still lands whole and is re-sent every turn after. This adds

5// the cap rtk already supports. It rewrites, it never refuses: nothing here can block a

6// call, and a skipped rewrite leaves today's behavior.

7// `-m` and not `-l`: the `-l` filters strip comments and nothing else, measured 10577 to

8// 5506 bytes on craftkit-routing.js and a no-op on markdown, so they delete the `why`

9// comments plus every ponytail:/flag: marker that karpathy-guidelines makes contract.

hooks/craftkit-transcript.jsView file

Lines 4-44javascript

4// once: a disagreement between the two would make one of them fire on the wrong turn,

5// which is indistinguishable from a broken gate.

6// Installed alongside the gates by adapters/claude.sh; required by relative path.

8const crypto = require('crypto');

9const fs =

install.shView file

•path = install.sh kind = build_helper sizeBytes = 1104 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

install.shView on unpkg

hooks/craftkit-platform-rules.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 3

High

Semantic Analysis Limited

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

hooks/craftkit-platform-rules.js#virtual:normalized:round1View on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = bash scripts/postinstall.sh

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

5"scripts": { "postinstall": "bash scripts/postinstall.sh" }, "engines": { "os": ["darwin", "linux"] }, "files": [ "rules/",

High

Suspicious Lifecycle Evidence

package.json runs scripts/postinstall.sh automatically during installation.

package.jsonView on unpkg · L5

•scripts.postinstall = bash scripts/postinstall.sh

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

hooks/craftkit-read-cap.jsView file

Findings

3 High5 Medium4 Low

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limitedhooks/craftkit-platform-rules.js#virtual:normalized:round1

HighSuspicious Lifecycle Evidencepackage.json

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirehooks/craftkit-read-cap.js

MediumEnvironment Vars

MediumShips Build Helperinstall.sh

MediumStructural Risk Force Deep Review

LowScripts Present

LowWeak Cryptohooks/craftkit-transcript.js

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @raditia/craftkit@1.50.0.

See all versions of @raditia/craftkit for other recorded verdicts.

Avoid installing @raditia/craftkit@1.50.0. 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: 2026-10-09 10:06:40.977Z (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

Runtime surface

Behavioral surface

Related packages

Other AI-agent control-surface risk packages

Source & flagged code