react-doctor

react-doctor is a skill for Claude Code, Codex from gvastethecreator/codex-studio. It costs 70 tokens per session (488 once invoked), scanned A, a copy of react-doctor, MIT.

A diagnostic tool for React applications that checks code health across correctness, security, accessibility, performance, bundle size, and architecture.

In plain words
What is it for?
Use it after changing React code, when fixing bugs, before committing, or when scanning and cleaning up a React project.
Why use it?
It helps find problems before release or committing changes, and can show whether a recent change introduced regressions.

Skill for Claude CodeCodex

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 skills/gvastethecreator/codex-studio/react-doctor
Any agent
npx skills add gvastethecreator/codex-studio --skill react-doctor
Clone the repo
git clone --depth 1 https://github.com/gvastethecreator/codex-studio

Made for: Claude Code, Codex.

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-doctor

README.md
[![agentmods](https://agentmods.dev/badge/skills/gvastethecreator/codex-studio/react-doctor.svg)](https://agentmods.dev/skills/gvastethecreator/codex-studio/react-doctor)
Your own site
<a href="https://agentmods.dev/skills/gvastethecreator/codex-studio/react-doctor"><img src="https://agentmods.dev/badge/skills/gvastethecreator/codex-studio/react-doctor.svg" alt="Measured on agentmods" height="20"></a>
Per session 70 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 488 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. Scan, not verified.
Origin 83% copy Near-identical to another mod 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 $0.00070 $0.00488
Opus 5 $0.00035 $0.00244
Sonnet 5 $0.00014 $0.00098
Haiku 4.5 $0.00007 $0.00049

Measured 3d ago against content hash 3b456a9f48a3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

react-doctor scanned grade A with 1 finding 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 3d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl --fail --silent --show-error \
Origin

This is a copy

83% identical to react-doctor — 25 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/skills/react-doctor/SKILL.md · 47 lines

What it actually says

React Doctor

Scans React codebases for security, performance, correctness, and architecture issues. Outputs a 0–100 health score.

After making React code changes:

Run npx react-doctor@latest --verbose --diff and check the score did not regress.

If the score dropped, fix the regressions before committing.

For general cleanup or code improvement:

Run npx react-doctor@latest --verbose (without --diff) to scan the full codebase. Fix issues by severity — errors first, then warnings.

/doctor — full local triage workflow

When the user types /doctor, says "run react doctor", or asks for a full triage / cleanup pass (not just a regression check), fetch the canonical local-triage playbook and follow every step in it:

curl --fail --silent --show-error \
  --header 'Cache-Control: no-cache' \
  https://www.react.doctor/prompts/react-doctor-agent.md

The playbook is the single source of truth — a scan → filter → triage → fix → validate loop that edits the working tree directly (never commits, never opens PRs). Updating the prompt at its source updates every agent on its next fetch — no skill reinstall needed.

Pair it with the matching per-rule prompts at https://www.react.doctor/prompts/rules/<plugin>/<rule>.md (fetched on demand inside the playbook) so each fix uses the canonical, reviewer-tested recipe.

Command

npx react-doctor@latest --verbose --diff
Flag Purpose
. Scan current directory
--verbose Show affected files and line numbers per rule
--diff Only scan changed files vs base branch
--score Output only the numeric score
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. 3d ago First seen · 47 lines · 70 tokens per session scan A 3b456a9f48a3

Subscribe to this mod's changes

react-doctor is a skill published in the GitHub repository gvastethecreator/codex-studio (12 stars, last pushed 4d ago), licensed MIT. It adds 70 tokens to every session and 488 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 83% identical to react-doctor, differing in 25 lines, and is treated as a copy.

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