npm-safe for DeepSeek Harness

Stop AI agents before they install a risky npm package.

14 agent tools · 22 security checks · integrity-verified deep scans · local SQLite cache

Install · See what it catches · Tool catalog · 中文

npm-safe-forDSH is a supply-chain security gate for DeepSeek Harness. It lets an agent inspect npm package metadata and published tarballs before an install, then returns evidence, a risk level, and an explainable score inside the same conversation.

If this makes your agent workflow safer, please Star the repository. It helps other DSH users find an independent security tool.

30-second install

dsh plugin --profile tui add @npm-safe/dsh-tool-npm-safe --allow-build=better-sqlite3
dsh --profile tui

Restart a running profile after installation. Then ask:

Deep-scan fast-glob before installing it. Explain every finding.

For a quick metadata-only check:

Use check_package to check lodash.

The plugin is declared as a native DSH bundle, so the official dsh plugin command installs the package and activates its cordis.patch.yml layer. --allow-build=better-sqlite3 grants build permission only to the SQLite driver used for the local cache; pnpm continues to block install scripts from other dependencies. Your selected DSH model provider must already be configured; a DeepSeek API key is only required when DeepSeek is the selected provider.

What it catches

Signal	Metadata scan	Deep scan
Suspicious lifecycle scripts and install hooks	✅	✅
Typosquatting, abandoned packages, risky maintainers	✅	✅
Non-standard registries and remote binaries	✅	✅
Tarball integrity mismatch and unsafe archive paths	—	✅
Obfuscated code, embedded secrets, shell/network execution	—	✅
Native binaries, WebAssembly, oversized or truncated content	—	✅

Metadata scans are fast and remain the default. Set deep: true to download the same-origin published tarball, verify npm integrity metadata, and inspect bounded source content entirely in memory.

package: fast-glob@3.3.3
level: safe
score: 88/100
integrity: verified
files scanned: 91
findings: 1 low, 0 medium, 0 high, 0 critical

Why use it in an agent

Typical agent workflow	With npm-safe-forDSH
Installs first and audits later	Checks before the install decision
Trusts package names and download counts	Evaluates maintainers, scripts, provenance signals, and content
Returns a pass/fail with little context	Returns findings, evidence, severity, score, and recommendations
Repeats registry traffic	Uses a local SQLite cache and rate limiting
Checks one package manually	Supports batch checks, watchlists, refresh jobs, and CI gates

14 agent tools

Tool	Purpose
check_package	Check one package, optionally with deep: true
check_packages	Rate-limited batch checking
search_packages	Search the npm registry
watch_add / watch_remove / watch_list	Manage a persistent watchlist
rules_list / rule_enable / rule_disable	Inspect and toggle rules
rule_set_severity	Override a rule severity
settings_get / settings_set	Read or update engine settings
ci_scan	Scan a project's dependencies as a security gate
refresh_all	Refresh the watchlist as a background DSH job

Security model

• Core detection is deterministic and local-first; no package source is sent to an external LLM by default.
• Deep scans reject cross-origin tarballs and enforce archive size, file count, decompression, path, and scanned-text limits.
• Findings are evidence, not a guarantee that a package is safe. Review high impact packages and pin versions in production.
• See the complete scanner rules and security policy.

Use the engine directly

pnpm add @npm-safe/core-dsh

import { NpmSafeEngine } from "@npm-safe/core-dsh";

const engine = new NpmSafeEngine();
const report = await engine.checkPackage("lodash", { deep: true });
console.log(report.level, report.score, report.findings);
await engine.close();

Develop from source

Requires Node.js 22.19+ and Corepack.

git clone https://github.com/nisconder/npm-safe-forDSH.git
cd npm-safe-forDSH
corepack enable
corepack prepare pnpm@11.7.0 --activate
pnpm install
pnpm run build
pnpm run typecheck
pnpm run test

Live registry smoke tests:

node scripts/smoke.mjs lodash
node scripts/smoke-facade.mjs

The workspace contains @npm-safe/core-dsh and the @npm-safe/dsh-tool-npm-safe bundle. DSH peer packages are aligned to the 0.1.0-rc.6 family; upgrades must remain aligned while DeepSeek Harness is in developer preview.

Documentation

• Plugin package and examples
• Engine API
• Architecture
• Scanner rules
• Contributing

This project adapts the engine from nisconder/npm-safe for DeepSeek Harness. It is an independent community project and is not affiliated with or endorsed by DeepSeek.

License

Apache-2.0 — Copyright 2026 Nisconder, InfiniteScope, Escap1ng, StoryBegins.