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@volter/supercode@0.5.253: Suspicious npm security report (Warn) | LPM Firewall

registry / @volter/supercode / 0.5.253

@volter/supercode@0.5.253

Volter Harness: a lightweight, customizable AI coding agent CLI — any model via OpenRouter; natively continues Claude Code and Codex sessions.

AI Security Review

scanned 1d ago · by lpm-firewall-ai

LPM treats this as warn-only first-party agent extension lifecycle risk. The postinstall hook can set up this package's skills and messaging tools in existing Claude and Codex environments for the machine's own installation.

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

Trigger

Installing or upgrading the machine's own global package runs postinstall.

Impact

This is automatic agent extension setup and changes the user's agent environment, but inspected source does not establish a concrete attack.

Mechanism

The hook imports the skills module, copies package-shipped skills to agent skill folders, and invokes the native binary to register messaging tools. It checks home ownership and preserves linked, unmarked, or edited skill folders.

AI rationale

Source inspection confirms automatic postinstall setup of first-party agent skills and messaging tools, which presents an agent extension lifecycle risk. Its guarded, package-owned behavior does not establish an active attack, so this warrants a warning rather than a block.

Evidence

~/.claude/skills/<skill>~/.codex/skills/<skill>

Decision evidence

public snapshot

AI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

Source & flagged code

8 flagged · loading source

package.jsonView file

•scripts.postinstall = node lib/release.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

bin/supercode.jsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = bin/supercode.js matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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.

bin/supercode.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 6de37407ff13b5c2 signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @volter/supercode@0.5.249 matchedPath = bin/supercode.js matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 similarity = 1.000 shingleOverlap = 8 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.

bin/supercode.jsView on unpkg

7L8: const { spawnSync } = require("child_process"); L9: const { pathToFileURL } = require("url");

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/supercode.jsView on unpkg · L7

lib/skills.mjsView file

8Install-time code directly mutates a foreign AI-agent control surface: L12: // `supercode teams connect` (sdk/teams bin/workspace.mjs). L13: import { cpSync, existsSync, lstatSync, mkdirSync, readFileSync, readdirSync, readlinkSync, renameSync, rmSync, statSync, writeFileSync } from 'node:fs'; L14: import { createHash } from 'node:crypto'; ... L25: const HARNESS_HOMES = [ L26: { harness: 'claude', home: () => process.env.CLAUDE_CONFIG_DIR || join(homedir(), '.claude') }, L27: { harness: 'codex', home: () => process.env.CODEX_HOME || join(homedir(), '.codex') }, L28: ]; ... L73: try { L74: mkdirSync(folder, { recursive: true }); L75: // written beside it and moved into place, so a harness reading skills never sees half of one ... L77: rmSync(staged, { recursive: true, force: true }); L78: c

Critical

Ai Agent Control Hijack

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

lib/skills.mjsView on unpkg · L8

lib/mcp.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/mcp.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/mcp.mjsView on unpkg

lib/release.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/release.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/release.mjsView on unpkg

lib/workflow.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/workflow.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/workflow.mjsView on unpkg

Source & flagged code

8 flagged

package.jsonView file

Lines 1-27json

1{

2 "name": "@volter/supercode",

3 "version": "0.5.253",

4 "description": "Volter Harness: a lightweight, customizable AI coding agent CLI — any model via OpenRouter; natively continues Claude Code and Codex sessions.",

5 "repository": { "type": "git", "url": "git+https://github.com/volter-ai/supercode.git" },

6 "homepage": "https://github.com/volter-ai/supercode#readme",

7 "bugs": { "url": "https://github.com/volter-ai/supercode/issues" },

8 "license": "MIT OR Apache-2.0",

9 "keywords": ["ai", "agent", "llm", "coding", "cli", "openrouter", "claude", "codex"],

10 "bin": { "supercode": "bin/supercode.js" },

11 "files": ["bin/", "lib/", "skills/"],

12 "engines": { "node": ">=16" },

13 "scripts": { "postinstall": "node lib/release.mjs" },

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L13

14 "dependencies": {

15 "@volter/supercode-orchestrator": "0.5.97",

16 "@volter/supercode-harness-sdk": "0.3.78",

17 "@volter/supercode-teams": "0.3.137"

18 },

19 "optionalDependencies": {

20 "@volter/supercode-cli-darwin-arm64": "0.5.253",

21 "@volter/supercode-cli-darwin-x64": "0.5.253",

22 "@volter/supercode-cli-linux-x64": "0.5.253",

23 "@volter/supercode-cli-linux-arm64": "0.5.253",

24 "@volter/supercode-cli-win32-x64": "0.5.253"

25 }

26}

27

bin/supercode.jsView file

Lines 1-27javascript

1#!/usr/bin/env node

2// The `supercode` front door. A command that has moved to TypeScript (lib/commands.mjs) is served here, in Node; every

3// other command goes to the native binary, which ships in a platform-specific optional dependency

4// (`@volter/supercode-cli-<os>-<cpu>`, npm installs only the one matching the host), with argv, stdio (so the

5// interactive REPL/TTY works) and the exit code forwarded as before (arc t_08d00e09, route step 2).

6"use strict";

7

8const { spawnSync } = require

lib/skills.mjsView file

Lines 1-28javascript

1// `supercode skills install`: the skills this release carries (skills/<name>/SKILL.md beside lib/), put into every

2// agent harness's skills folder in this OS user's home, and the messaging tools registered with each harness

3// (t_266912ff). A release ships its skills: a machine had them only where someone linked a checkout of agent-skills

4// by hand, so an agent on a machine (or under WSL) with none did not know supercode.

5//

6// Idempotent. A skill folder this installs carries a marker (`.supercode-release`: the release that wrote it and a hash

7// of what it wrote) and is replaced whole when another release's; a folder or link someone else put there is theirs,

8// and so is one edited since supercode wrote it (its files no longer hash to its marker's): both are left alone, said

9// in the report. Only this OS user's home is written (under sudo, root's): a Windows install does not reach a WSL

lib/mcp.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/mcp.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/mcp.mjsView on unpkg

lib/release.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/release.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/release.mjsView on unpkg

lib/workflow.mjsView file

•matchType = normalized_sha256 matchedPackage = @volter/supercode@0.5.249 matchedPath = lib/workflow.mjs matchedIdentity = npm:QHZvbHRlci9zdXBlcmNvZGU:0.5.249 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/workflow.mjsView on unpkg