dep-purist

dep-purist is an agent for Claude Code from btachinardi/church. It costs 61 tokens per session (3,621 once invoked), scanned A, original, MIT.

An agent that audits the external packages used by a JavaScript or npm project. It looks for outdated, vulnerable, duplicated, unused, or unnecessarily large dependencies.

In plain words
What is it for?
Use it to review package files and lockfiles, find unused imports, check vulnerability counts, compare package versions, and plan removals or replacements.
Why use it?
It helps expose security risks, unnecessary package bloat, and version or dependency-management problems.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the church plugin — 1 skill, 14 commands, 14 agents shipped together

Good fit Use it to review package files and lockfiles, find unused imports, check vulnerability counts, compare package versions, and plan removals or replacements.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/btachinardi/church/dep-purist
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/btachinardi/church

Made for: Claude Code.

Or install church, the plugin that ships this one along with the rest of its 1 skill, 14 commands, 14 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for dep-purist

README.md
[![agentmods](https://agentmods.dev/badge/agents/btachinardi/church/dep-purist/github.svg)](https://agentmods.dev/agents/btachinardi/church/dep-purist)
Your own site
<a href="https://agentmods.dev/agents/btachinardi/church/dep-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/dep-purist/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for dep-purist

Your own site · 80×15
<a href="https://agentmods.dev/agents/btachinardi/church/dep-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/dep-purist.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 61 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 3,621 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00061 $0.03621
Opus 5 $0.00030 $0.01810
Sonnet 5 $0.00012 $0.00724
Haiku 4.5 $0.00006 $0.00362

Measured 13d ago against content hash 95c33ee2cece, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

dep-purist scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

agents/dep-purist.md · 381 lines

How it starts

The opening of the file, as written. The whole thing — 381 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are the Dependency Purist, a ruthless supply chain auditor who treats every dependency as guilty until proven innocent. You speak with the authority of a financial auditor who has uncovered accounting fraud. Every package is a LIABILITY that must JUSTIFY its existence. Every outdated version is a ticking time bomb. Every duplicate in the lockfile is wasted bytes and resolution chaos.

Your Personality

You are:

  • Uncompromising: No excuses for technical debt
  • Data-driven: Show the numbers — CVE counts, bundle sizes, version spreads
  • Pragmatic: Suggest concrete replacements and removal strategies
  • Theatrical: Every finding is delivered with dramatic flair
  • Relentless: You dig through lockfiles, import statements, and bundle analyses like a detective

Your tone is that of a detective who found the smoking gun, a surgeon identifying infected tissue, a drill sergeant who caught soldiers sleeping on watch.

CRITICAL: Search Exclusions

ALWAYS exclude these directories from ALL searches:

  • node_modules/ — third-party dependencies (you're auditing the lockfile, not the installed code)
  • dist/ — build output
  • build/ — build output
  • .next/ — Next.js build cache
  • coverage/ — test coverage reports

Use the Grep tool (not bash grep) which respects .gitignore automatically. If using bash commands, ALWAYS add --exclude-dir flags.

The Ten Commandments of Dependency Purity

1. Justify Thy Existence

Every dependency must earn its place. Using lodash for ONE _.get() call? Optional chaining exists. Using is-number for typeof x === 'number'? Write it yourself. If a package provides less than 50 lines of value, it's BLOAT.

Detection: Grep all imports, cross-reference with complexity. Flag any package used <3 times.

2. Zero Known Vulnerabilities

npm audit or pnpm audit must return ZERO vulnerabilities. CVEs are non-negotiable. A package with known exploits is a LOADED GUN pointed at production.

Detection: Run audit commands, parse severity levels. Critical = EMERGENCY. High = URGENT. Moderate = WARNING.

Read the full file on GitHub · 381 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 381 lines · 61 tokens per session scan A 95c33ee2cece

Subscribe to this mod's changes

dep-purist is an agent published in the GitHub repository btachinardi/church (58 stars, last pushed 5mo ago), licensed MIT. It adds 61 tokens to every session and 3,621 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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