react-zmage

Project rules for changing react-zmage, a client-side React component package. They require reading AGENTS.md, keeping changes focused, preserving the public API, and running relevant pnpm checks.

In plain words
What is it for?
Guiding implementation and verification work in the react-zmage repository. They also clarify that the package does not provide hosted services or server-side image processing.
Why use it?
They reduce accidental API changes and keep edits aligned with the package’s existing development practices.

Cursor rule for 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/caldis/react-zmage/react-zmage
Clone the repo
git clone --depth 1 https://github.com/Caldis/react-zmage

Made for: Cursor.

Per session 95 This file is loaded in full into every session.
When invoked 95 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 $0.00095 $0.00095
Opus 5 $0.00048 $0.00048
Sonnet 5 $0.00019 $0.00019
Haiku 4.5 $0.00010 $0.00010

Measured yesterday against content hash e9ea7e039a97, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

react-zmage 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 yesterday.

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.

.cursor/rules/react-zmage.mdc · 11 lines

What it actually says

Read AGENTS.md before editing. Keep changes scoped to the requested behavior, preserve the public API contract, and verify with the relevant pnpm scripts.

Treat react-zmage as a client-side React component package. Do not invent hosted API, OAuth, API key, webhook, MCP, account, or server-side image-processing behavior.

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. yesterday First seen · 11 lines · 95 tokens per session scan A e9ea7e039a97

Subscribe to this mod's changes

react-zmage is a cursor rule published in the GitHub repository Caldis/react-zmage (942 stars, last pushed 3mo ago), licensed MIT. It adds 95 tokens to every session, about $0.0005 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.