rendering-and-memoization

rendering-and-memoization is a cursor rule for Cursor from grafana/grafana-pathfinder-app. It costs 50 tokens per session (1,088 once invoked), scanned A, original, AGPL-3.0.

A set of review rules for React applications covering list keys, frequently changing context, and inline functions that interfere with render optimisations. A list key helps React track which item changed.

In plain words
What is it for?
Use it when reviewing React code for anti-patterns R9, R11, and R12 or tuning render performance.
Why use it?
It helps find avoidable component updates and rendering problems during performance work.

Cursor rule for Cursor ✓ vendor

Written for Cursor: installed under .cursor/.

Good fit Use it when reviewing React code for anti-patterns R9, R11, and R12 or tuning render performance.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/grafana/grafana-pathfinder-app/rendering-and-memoization
About the project

grafana-pathfinder-app is a Grafana plugin that adds documentation and guided tutorials inside Grafana's interface. It helps Grafana users find context-relevant help, follow interactive learning paths, and track progress without leaving the application. Its catalogue entries define guidance for using the plugin.

grafana/grafana-pathfinder-app · 19 stars · on GitHub · grafana.com

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/grafana/grafana-pathfinder-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 rendering-and-memoization

README.md
[![agentmods](https://agentmods.dev/badge/rules/grafana/grafana-pathfinder-app/rendering-and-memoization/github.svg)](https://agentmods.dev/rules/grafana/grafana-pathfinder-app/rendering-and-memoization)
Your own site
<a href="https://agentmods.dev/rules/grafana/grafana-pathfinder-app/rendering-and-memoization"><img src="https://agentmods.dev/badge/rules/grafana/grafana-pathfinder-app/rendering-and-memoization/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 rendering-and-memoization

Your own site · 80×15
<a href="https://agentmods.dev/rules/grafana/grafana-pathfinder-app/rendering-and-memoization"><img src="https://agentmods.dev/badge/rules/grafana/grafana-pathfinder-app/rendering-and-memoization.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,088 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 unknown 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 $0.00050 $0.01088
Opus 5 $0.00025 $0.00544
Sonnet 5 $0.00010 $0.00218
Haiku 4.5 $0.00005 $0.00109

Measured 9d ago against content hash ea246e020362, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

rendering-and-memoization 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 9d 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.

.cursor/rules/react-antipatterns/rendering-and-memoization.mdc · 176 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 9d ago First seen · 176 lines · 50 tokens per session scan A ea246e020362

Subscribe to this mod's changes

rendering-and-memoization is a cursor rule published in the GitHub repository grafana/grafana-pathfinder-app (19 stars, last pushed today), licensed AGPL-3.0. It adds 50 tokens to every session and 1,088 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.