@metaphi-ai/hum@0.2.43

Hum: a self-improving coding agent for your terminal.

AI Security Review

scanned 14d ago · by lpm-firewall-ai

Source inspection shows an automatic, package-owned setup path that installs the matching Python core. Although setup executes uv's upstream installer if uv is absent, the inspected code provides no evidence of malicious behavior or a concrete attack against the consumer.

Static reason

One or more suspicious static signals were detected.

Trigger

Installing the npm package runs its postinstall hook; launching the CLI may select a newer installed package version.

Impact

The setup downloads and executes installation tools and creates a local Python environment; no credential theft or agent control-surface mutation was established.

Mechanism

The installer sets up hum-cli in the package's .hum directory and fetches a matching package version with npm lifecycle scripts disabled. If uv is missing, it runs uv's upstream installer.

AI rationale

Evidence

package.jsonscripts/postinstall.jsdist/install.mjs

Network endpoints2

astral.sh/uv/install.ps1astral.sh/uv/install.sh

Decision evidence

public snapshot

AI called this Clean at 88.0% confidence as Benign with medium false-positive risk.

Evidence for AI clean decision

The manifest declares a postinstall hook that runs the package's own setup script.
The hook checks whether this version's Python core is installed and installs it if missing.
The installer uses a package-version-pinned hum-cli dependency; its update fetch uses npm with scripts disabled.
If uv is absent, setup runs its upstream installer from astral.sh.

Evidence against

The inspected postinstall path installs this package's own core rather than mutating an AI-agent control surface.
The package update fetch is version-specific and passes --ignore-scripts.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 3 file(s), 274 KB of source, external domains: api.nuget.org, astral.sh, github.com, hum.metaphi.ai, react.dev

Source & flagged code

9 flagged

package.jsonView file

Lines 1-13json

2 "name": "@metaphi-ai/hum",

3 "version": "0.2.43",

4 "description": "Hum: a self-improving coding agent for your terminal.",

5 "license": "UNLICENSED",

6 "type": "module",

7 "bin": { "hum": "bin/hum.js" },

8 "files": ["bin", "dist", "scripts"],

9 "scripts": { "postinstall": "node scripts/postinstall.js" },

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L9

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L9

10 "engines": { "node": ">=22" },

11 "repository": { "type": "git", "url": "git+https://github.com/metaphi-labs/hum.git" }

12}

dist/install.mjsView file

Lines 1-21javascript

1// src/install.js

2import { spawnSync } from "node:child_process";

3import fs from "node:fs";

High

Child Process

Package source references child process execution.

dist/install.mjsView on unpkg · L1

4import os from "node:os";

dist/install.mjs#virtual:normalized:round1View file

95fs.mkdirSync(path.dirname(dir), { recursive: true }); L96: const r = runImpl("powershell", ["-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", script]); L97: try {

High

Shell

Package source references shell execution.

dist/install.mjs#virtual:normalized:round1View on unpkg · L95

•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.

dist/install.mjs#virtual:normalized:round1View on unpkg

bin/hum.jsView file

Lines 5-30javascript

5// it over localhost. Everything the person sees is there; everything the session records is in

6// the core. This file is what npm put on PATH and it changes only when npm reinstalls it: keep

7// it small, and keep it running whatever the versions directory holds.

8import fs from 'node:fs';

9import { fileURLToPath, pathToFileURL } from 'node:url';

10import path from

dist/cli.mjsView file

•path = dist/cli.mjs kind = oversized_source_file sizeBytes = 4207870 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

dist/cli.mjsView on unpkg

•path = dist/cli.mjs kind = oversized_cli_entrypoint sizeBytes = 4207870 magicHex = [redacted]

Medium

Oversized Cli Entrypoint

Package contains an oversized executable-looking CLI entrypoint.

dist/cli.mjsView on unpkg

Source & flagged code

9 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

dist/install.mjsView file

1// src/install.js L2: import { spawnSync } from "node:child_process"; L3: import fs from "node:fs";

High

Child Process

Package source references child process execution.

dist/install.mjsView on unpkg · L1

Findings

5 High6 Medium5 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/install.mjs

HighShelldist/install.mjs#virtual:normalized:round1

HighCross File Remote Execution Contextdist/install.mjs

HighSemantic Analysis Limiteddist/install.mjs#virtual:normalized:round1

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirebin/hum.js

MediumEnvironment Vars

MediumOversized Source Filedist/cli.mjs

MediumOversized Cli Entrypointdist/cli.mjs

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

Affected versions and remediation

This report applies to @metaphi-ai/hum@0.2.43.

See all versions of @metaphi-ai/hum for other recorded verdicts.

Review the evidence and your use of @metaphi-ai/hum@0.2.43 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: 2026-10-09 06:57:15.667Z (UTC).

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