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@jenga-ai/agent@4.1.1: AI-agent control-surface risk | LPM Firewall

registry / @jenga-ai/agent / 4.1.1

@jenga-ai/agent@4.1.1

An agentic development workflow for Claude Code, Copilot, and Codex — with a persistent Epic/Story/Task board, an isolated git worktree per task, and a separate tester agent that runs your test suite before anything is marked done.

AI Security Review

scanned 9d ago · by lpm-firewall-ai

LPM flags this version as an AI-agent control-surface risk. An npm post-install hook changes AI-agent discovery and Copilot control files in the consumer project without an interactive consent step.

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; previous stored version diff introduced dangerous source

Trigger

Installing the package through npm triggers postinstall.

Impact

A package installation can automatically influence prompt routing and session hooks for AI coding tools in the consumer project.

Mechanism

The hook copies agent content into .claude and .agents, then bootstraps Copilot instructions and native hook configuration pointing to package-owned scripts.

Policy narrative

The declared post-install lifecycle hook runs automatically during dependency installation. It places package-controlled content in agent discovery directories and writes Copilot instruction and hook configuration without prompting the user. This mutates broad AI-agent control surfaces as part of installation and routes future agent activity through package-owned scripts.

AI rationale

The package performs unconsented post-install mutation of multiple consumer AI-agent control surfaces. This meets the blocking policy for lifecycle-based control-surface modification.

Evidence

package.jsonscripts/postinstall.js.claude.agents.github/copilot-instructions.md.github/hooks/jenga.json

Decision evidence

Source & flagged code

20 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

•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

mcp/training_runner/index.jsView file

15import { join, resolve } from "path"; L16: import { spawn } from "child_process"; L17: import { load as yamlLoad } from "js-yaml";

High

Child Process

Package source references child process execution.

mcp/training_runner/index.jsView on unpkg · L15

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = mcp/training_runner/index.js matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

mcp/training_runner/index.jsView on unpkg

project/app/ui/scripts/build-snapshot-html.cjsView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = project/app/ui/scripts/build-snapshot-html.cjs matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

project/app/ui/scripts/build-snapshot-html.cjsView on unpkg

46L47: const fs = require('fs'); L48: const path = require('path');

Medium

Dynamic Require

Package source references dynamic require/import behavior.

project/app/ui/scripts/build-snapshot-html.cjsView on unpkg · L46

project/app/ui/scripts/dashboard-open.cjsView file

16L17: const http = require('http'); L18: const { execFile } = require('child_process'); L19: ... L22: L23: let port = parseInt(process.env.JENGA_API_PORT || '3001', 10); L24:

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

project/app/ui/scripts/dashboard-open.cjsView on unpkg · L16

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = [redacted]-open.cjs matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

project/app/ui/scripts/dashboard-open.cjsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = bd69a3ed71f9357a signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = [redacted]-open.cjs matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 similarity = 1.000 shingleOverlap = 76 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.

scripts/postinstall.jsView file

6* Copies the discovery-bound dirs — `skills/` and `agents/` — into BOTH L7: * `<consumer>/.claude/` (where Claude Code looks) and `<consumer>/.agents/` L8: * (where non-Claude agents like Copilot / custom look, per the framework's ... L40: * Location : one manifest per destination root, inside that root — L41: * <consumer>/.agents/.jenga-postinstall-manifest.json L42: * <consumer>/.claude/.jenga-postinstall-manifest.json L43: * Keeping it inside the root it describes means it travels with that ... L50: * "generated_at": "<ISO 8601>", L51: * "dest_root": ".agents", L52: * "paths": ["agents/developer.md", "skills/j-do/SKILL.md"] ... L203: L204: // Discovery-bound dirs get mirr

Critical

Ai Agent Control Hijack

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

scripts/postinstall.jsView on unpkg · L6

lib/commands/init.jsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. const __dirname = dirname(fileurltopath(import.meta.url)); const package_root = join(__dirname, "..", ".."); async function prompt(rl, question, defaultvalue) { return new promise(resolve => { const hint = defaultvalue !== undefined ? ` (default: ${defaultvalue})` : ""; rl.question(`${question}${hint}: `, answer => { resolve(answer.trim() || string(defaultvalue ?? "")); }); }); } export async function runinit(args, projectroot = process.cwd()) { const configpath = join(projectroot, config_file); let existing = {}; if (existssync(configpath)) { try { existing = json.parse(readfilesyn

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/commands/init.jsView on unpkg

hooks/on_session_end.shView file

•path = hooks/on_session_end.sh kind = build_helper sizeBytes = 20765 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

hooks/on_session_end.shView on unpkg

project/app/api/parsers/todo.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.

project/app/api/parsers/todo.js#virtual:normalized:round1View on unpkg

project/app/ui/scripts/dashboard-start.cjsView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = [redacted]-start.cjs matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

project/app/ui/scripts/dashboard-start.cjsView on unpkg

lib/commands/dashboard.jsView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = lib/commands/dashboard.js matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

lib/commands/dashboard.jsView on unpkg

project/app/api/scripts/capture-snapshot.jsView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = project/app/api/scripts/capture-snapshot.js matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

project/app/api/scripts/capture-snapshot.jsView on unpkg

project/app/api/parsers/architecture.jsView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = [redacted].js matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

project/app/api/parsers/architecture.jsView on unpkg

skills/j-publish/scripts/npm_stage_pipeline.shView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = skills/j-publish/scripts/npm[redacted] matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

skills/j-publish/scripts/npm_stage_pipeline.shView on unpkg

skills/j-uncharted/scripts/import-source.shView file

•matchType = normalized_sha256 matchedPackage = @jenga-ai/agent@4.1.0 matchedPath = skills/j-uncharted/scripts/import-source.sh matchedIdentity = npm:QGplbmdhLWFpL2FnZW50:4.1.0 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.

skills/j-uncharted/scripts/import-source.shView on unpkg