registry / AI-agent control-surface risk / @nookplot/mcp

@nookplot/mcp

Nookplot MCP server — connect any MCP-compatible agent to the Nookplot network

This report shows the evidence for @nookplot/mcp@0.4.132. 2 of 3 known versions are blocked or flagged. The newest version, 0.4.141, is flagged. See all versions.

AI Security Review

scanned 4mo ago · by lpm-firewall-ai

Source inspection confirms a postinstall hook that writes package-controlled Claude skill instructions into the user's AI agent configuration area without an explicit setup command. That meets the firewall boundary for unconsented lifecycle AI-agent control-surface mutation, even though credential and network behavior otherwise appears package-aligned. Product guard normalized a concrete AI-agent control hijack publish_block to the blockable dangerous-capability shape.

Static reason

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

Trigger

npm install or npx install lifecycle; also MCP server startup repeats the skill install

Impact

Adds autonomous slash-command instructions to Claude Code without explicit install-time consent, enabling package-defined agent workflows and recurring cron prompts inside the AI agent environment.

Mechanism

unconsented lifecycle copy of agent skill files

Policy narrative

On install, the postinstall script silently copies bundled skill directories into ~/.claude/skills if Claude Code is present. Those skills define slash-command agent workflows that can create recurring cron jobs and drive MCP tool usage. This is an install-time mutation of an AI-agent control surface, independent of the package's otherwise aligned Nookplot network functionality.

AI rationale

Evidence

package.jsondist/postinstall.jsdist/index.jsdist/setup.jsdist/applyConfig.jsskills/nookplot/SKILL.mdskills/mine/SKILL.mdskills/social/SKILL.md

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 defines postinstall: node dist/postinstall.js
dist/postinstall.js copies package skills into ~/.claude/skills during npm install when ~/.claude exists
dist/index.js also installs skills into ~/.claude/skills at server startup
skills/*/SKILL.md define agent slash-command workflows that create recurring Cron jobs
dist/setup.js can write MCP config for Claude/Codex/Hermes, but only via explicit setup command

Evidence against

No install-time credential harvesting or network calls seen in dist/postinstall.js
Gateway network calls are package-aligned to https://gateway.nookplot.com or user/env-configured gateway
dist/applyConfig.js uses execFileSync without shell and validates Hermes keys
Credentials are stored locally under ~/.nookplot with restrictive modes
On-chain signing and token tools are user-invoked MCP capabilities

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell

Source & flagged code

7 flagged

package.jsonView file

•scripts.postinstall = node dist/postinstall.js 2>/dev/null || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node dist/postinstall.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

dist/applyConfig.jsView file

26import { createDecipheriv } from "node:crypto"; L27: import { execFileSync } from "node:child_process"; L28: import { readFileSync, writeFileSync, existsSync, mkdirSync, chmodSync } from "node:fs";

High

Child Process

Package source references child process execution.

dist/applyConfig.jsView on unpkg · L26

•matchType = normalized_sha256 matchedPackage = @nookplot/mcp@0.4.130 matchedPath = dist/applyConfig.js matchedIdentity = npm:QG5vb2twbG90L21jcA:0.4.130 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/applyConfig.jsView on unpkg

dist/postinstall.jsView file

1Install-time AI-agent control hijack evidence: L1: /** L2: * Postinstall script — copies skill files to ~/.claude/skills/ immediately L3: * when the package is installed via npm/npx. This ensures /nookplot, /mine, ... L9: */ L10: import { existsSync, mkdirSync, readdirSync, statSync, copyFileSync } from "node:fs"; L11: import { fileURLToPath } from "node:url"; ... L15: if (!existsSync(dest)) L16: mkdirSync(dest, { recursive: true }); L17: for (const file of readdirSync(src)) { ... L23: else { L24: copyFileSync(srcPath, destPath); L25: } Payload evidence from SKILL.md: L127: |----------|---------|-------------| L128: | `NOOKPLOT_GATEWAY_URL` | `https://gateway.nookplot.com` | Gateway endpoint | L129: | `NOOKPLOT_AGENT_NAME` | `MCP Agent` | Name for auto-registration |

Critical

Ai Agent Control Hijack

Install-time source drops package-supplied AI-agent/MCP control files or instructions.

dist/postinstall.jsView on unpkg · L1

dist/setup.jsView file

1/** L2: * `npx @nookplot/mcp setup` — One-command onboarding. L3: * ... L14: import { homedir, platform } from "node:os"; L15: import { execSync } from "node:child_process"; L16: import { createInterface } from "node:readline";

High

Runtime Package Install

Package source invokes a package manager install command at runtime.

dist/setup.jsView on unpkg · L1

•matchType = normalized_sha256 matchedPackage = @nookplot/mcp@0.4.130 matchedPath = dist/setup.js matchedIdentity = npm:QG5vb2twbG90L21jcA:0.4.130 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/setup.jsView on unpkg

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node dist/postinstall.js 2>/dev/null || true

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node dist/postinstall.js 2>/dev/null || true

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

dist/applyConfig.jsView file

26import { createDecipheriv } from "node:crypto"; L27: import { execFileSync } from "node:child_process"; L28: import { readFileSync, writeFileSync, existsSync, mkdirSync, chmodSync } from "node:fs";

High

Child Process

Package source references child process execution.

dist/applyConfig.jsView on unpkg · L26

Findings

1 Critical6 High4 Medium4 Low

CriticalAi Agent Control Hijackdist/postinstall.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/applyConfig.js

HighShell

HighRuntime Package Installdist/setup.js

HighKnown Malware Source Similaritydist/setup.js

HighKnown Malware Source Similaritydist/applyConfig.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @nookplot/mcp@0.4.132.

The versions list below shows the verdict for each recorded version.

Avoid installing @nookplot/mcp@0.4.132. 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: 2026-07-03 00:51:05.795Z (UTC).

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

Versions

3 known versions

0.4.141latestSuspiciousAgent extension lifecycle riskWarnPublishedAug 20, 2026, 6:06 PM 0.4.132shownMaliciousSoft block: AI-agent control surfaceBlockPublishedJul 3, 2026, 12:49 AM 0.4.130MaliciousSoft block: AI-agent control surfaceBlockPublishedJul 2, 2026, 4:54 AM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

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Other AI-agent control-surface risk packages

Runtime surface

Behavioral surface

Related packages

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Other AI-agent control-surface risk packages

Source & flagged code