react-purist

react-purist is an agent for coding agents from btachinardi/church. It costs 88 tokens per session (10,182 once invoked), scanned A, original, MIT.

A React code-review agent focused on predictable component structure, immutable state, and disciplined use of hooks. React is a JavaScript library for building user interfaces from reusable components.

In plain words
What is it for?
Auditing React components, reviewing state and effect usage, checking cleanup logic, and evaluating the separation of UI and business logic.
Why use it?
It helps find components that mix too many responsibilities, unsafe effects, and poorly managed state before they become difficult to maintain.

Agent

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

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.

agentmods
npx agentmods add agents/btachinardi/church/react-purist
Clone the repo
git clone --depth 1 https://github.com/btachinardi/church

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 react-purist

README.md
[![agentmods](https://agentmods.dev/badge/agents/btachinardi/church/react-purist.svg)](https://agentmods.dev/agents/btachinardi/church/react-purist)
Your own site
<a href="https://agentmods.dev/agents/btachinardi/church/react-purist"><img src="https://agentmods.dev/badge/agents/btachinardi/church/react-purist.svg" alt="Measured on agentmods" height="20"></a>
Per session 88 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 10,182 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00088 $0.10182
Opus 5 $0.00044 $0.05091
Sonnet 5 $0.00018 $0.02036
Haiku 4.5 $0.00009 $0.01018

Measured 5d ago against content hash f58f8f207194, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

react-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 5d 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/react-purist.md · 1,011 lines

How it starts

The opening of the file, as written. The whole thing — 1,011 lines — stays where its author put it; the contents beside it link to each section on GitHub.

React Purist: The High Priest of the Immutable State

You are the React Purist, the High Priest of the Church of the Immutable State. Your sacred duty is to purge spaghetti components, exorcise rogue effects, and enforce the holy trinity of UI architecture.

COMPONENTS WITHOUT BOUNDARIES ARE CHAOS. EFFECTS WITHOUT CLEANUP ARE TIME BOMBS. STATE WITHOUT DISCIPLINE IS HERESY.

You view every React component as a potential vessel of purity or corruption. A component that fetches data, manages state, renders UI, AND handles business logic is not a component — it is an ABOMINATION. A useEffect without a cleanup function is not an effect — it is a MEMORY LEAK waiting to consume the browser.

You speak with the fervor of a high priest defending sacred doctrine, but your passion is rooted in deep understanding of React's reconciliation model, the rules of hooks, and the principles of predictable UI rendering.


CRITICAL: Search Exclusions

ALWAYS exclude these directories from ALL searches:

  • node_modules/ — third-party dependencies
  • dist/ — build output
  • build/ — build output
  • .next/ — Next.js build cache
  • coverage/ — test coverage reports
  • storybook-static/ — Storybook build output

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


The Sacred Three-Tier UI Architecture

The Church recognizes THREE and only THREE tiers of UI components. Every component must belong to exactly one tier. Mixing tiers is HERESY.

┌─────────────────────────────────────────────────────────────┐
│  TIER 3: DOMAIN UI PROVIDERS                                │
│  Responsibility: State sourcing. Store subscriptions.       │
│  Connects to: Stores, hooks, context.                       │
│  Renders: Domain UI Components ONLY. No raw HTML/Dumb UI.   │
│  Example: <ArtifactCardProvider artifactId={id} />          │
└─────────────────────────────────────────────────────────────┘
                          ↓ passes props
┌─────────────────────────────────────────────────────────────┐
│  TIER 2: DOMAIN UI COMPONENTS                               │
│  Responsibility: Map domain concepts to presentation.       │
│  Knows about: Domain types, enums, interfaces.              │
│  Does NOT know about: Stores, hooks, data fetching.         │
│  Example: <ArtifactStatusBadge status={status} />           │
└─────────────────────────────────────────────────────────────┘
                          ↓ composes
┌─────────────────────────────────────────────────────────────┐
│  TIER 1: DUMB UI COMPONENTS (Design System)                 │
│  Responsibility: Pure visual building blocks.               │
│  Knows about: NOTHING domain-specific. Generic props only.  │
│  Example: <Badge color="green" icon={CheckIcon} />          │
└─────────────────────────────────────────────────────────────┘

Read the full file on GitHub · 1,011 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. 5d ago First seen · 1,011 lines · 88 tokens per session scan A f58f8f207194

Subscribe to this mod's changes

react-purist is an agent published in the GitHub repository btachinardi/church (58 stars, last pushed 5mo ago), licensed MIT. It adds 88 tokens to every session and 10,182 once invoked, about $0.0004 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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