modus-checkbox-value-inversion-react-short

modus-checkbox-value-inversion-react-short is a cursor rule for Cursor from julianoczkowski/create-trimble-app. It costs 228 tokens per session, scanned A, original, MIT.

A short workaround for a Modus checkbox bug that reverses the value reported by its change event. It tells React code to invert that value before using it as checked state.

In plain words
What is it for?
Use it in React event handlers or wrapper components that read the value of a Modus checkbox.
Why use it?
It stops checked and unchecked states from being interpreted backwards.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/.

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 rules/julianoczkowski/create-trimble-app/modus-checkbox-value-inversion-react-short
Clone the repo
git clone --depth 1 https://github.com/julianoczkowski/create-trimble-app

Made for: Cursor.

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 modus-checkbox-value-inversion-react-short

README.md
[![agentmods](https://agentmods.dev/badge/rules/julianoczkowski/create-trimble-app/modus-checkbox-value-inversion-react-short.svg)](https://agentmods.dev/rules/julianoczkowski/create-trimble-app/modus-checkbox-value-inversion-react-short)
Your own site
<a href="https://agentmods.dev/rules/julianoczkowski/create-trimble-app/modus-checkbox-value-inversion-react-short"><img src="https://agentmods.dev/badge/rules/julianoczkowski/create-trimble-app/modus-checkbox-value-inversion-react-short.svg" alt="Measured on agentmods" height="20"></a>
Per session 228 This file is loaded in full into every session.
When invoked 228 The same file — it is already loaded in full.
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 5.1 $0.00228 $0.00228
Opus 5 $0.00114 $0.00114
Sonnet 5 $0.00046 $0.00046
Haiku 4.5 $0.00023 $0.00023

Measured 2d ago against content hash 665754243170, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

modus-checkbox-value-inversion-react-short 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 2d 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.

templates/react/.cursor/rules/modus-checkbox-value-inversion-react-short.mdc · 24 lines

What it actually says

Modus Checkbox Value Inversion - Short

Critical bug fix for ModusWcCheckbox value property inversion.

Key Rules

  • Always invert checkbox value property - const actualChecked = !value from inputChange event
  • Use wrapper components - Create React wrapper to handle inversion automatically
  • Never trust the raw value - The value property is inverted (false when checked, true when unchecked)
  • Handle in event handlers - Invert value in onInputChange event handler
  • Use utility functions - Create helper functions for value inversion
  • Test thoroughly - Verify checkbox behavior matches expected state
  • Document the bug - Make team aware of this critical issue

Reference

For detailed bug explanation, wrapper component patterns, and utility functions, fetch the full rule: modus-checkbox-value-inversion-react

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. 2d ago First seen · 24 lines · 228 tokens per session scan A 665754243170

Subscribe to this mod's changes

modus-checkbox-value-inversion-react-short is a cursor rule published in the GitHub repository julianoczkowski/create-trimble-app (3 stars, last pushed 2mo ago), licensed MIT. It adds 228 tokens to every session, about $0.0011 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 2026-09-03.