neqsim: Cursor rule for Cursor

.cursorrules

cursorrules is a cursor rule for Cursor from equinor/neqsim. It costs 305 tokens per session, scanned A, original, Apache-2.0.

A set of project rules for Cursor, an AI coding editor, when working on the NeqSim Java project. It tells the editor which coding, build, testing, and simulation practices to follow.

In plain words
What is it for?
Use it when writing or reviewing NeqSim code that must work with Java 8. It covers build and test commands, static checks, fluid initialisation, mixing rules, and the project's agent and skill files.
Why use it?
It reduces mistakes caused by using unsupported Java features or skipping required NeqSim setup steps. It also gives consistent commands for compiling, testing, and checking code quality.

Cursor rule for Cursor

Written for Cursor: installed under .cursor/. Also seen: mentions AGENTS.md; mentions Cursor.

This is equinor/neqsim's own configuration. It tells Cursor how to work on neqsim itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything neqsim configures →

Reuse

Borrowing it

Nothing to install: this file belongs to equinor/neqsim. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/equinor/neqsim/master/.cursorrules
Clone the repo
git clone --depth 1 https://github.com/equinor/neqsim

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 cursorrules

README.md
[![agentmods](https://agentmods.dev/badge/rules/equinor/neqsim/cursorrules/github.svg)](https://agentmods.dev/rules/equinor/neqsim/cursorrules)
Your own site
<a href="https://agentmods.dev/rules/equinor/neqsim/cursorrules"><img src="https://agentmods.dev/badge/rules/equinor/neqsim/cursorrules/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 cursorrules

Your own site · 80×15
<a href="https://agentmods.dev/rules/equinor/neqsim/cursorrules"><img src="https://agentmods.dev/badge/rules/equinor/neqsim/cursorrules.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 305 This file is loaded in full into every session.
When invoked 305 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00305 $0.00305
Opus 5.5 $0.00122 $0.00122
Sonnet 5.5 $0.00061 $0.00061
Haiku 4.5 $0.00030 $0.00030

Measured 1mo ago against content hash 5eb70cde27bf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

cursorrules 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 1mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.cursorrules · 28 lines

What it actually says

Cursor Rules for NeqSim

This file is read automatically by Cursor AI. It mirrors the content in AGENTS.md — see that file for the full reference.

Please read and follow the instructions in AGENTS.md.

All code MUST compile with Java 8. See AGENTS.md for forbidden features, build commands, code patterns, skills, and the task-solving workflow.

Critical Constraints

  • Java 8 ONLY — no var, List.of(), Map.of(), String.repeat(), text blocks, records
  • Use Arrays.asList(), StringUtils.repeat(), explicit types
  • Build: ./mvnw install (Linux/Mac), mvnw.cmd install (Windows)
  • Test: ./mvnw test -Dtest=ClassName
  • Static analysis: ./mvnw checkstyle:check spotbugs:check pmd:check
  • After flash: call fluid.initProperties() before reading transport properties
  • Always set mixing rule: fluid.setMixingRule("classic")

Agent & Skill System

  • 25 agents in .github/agents/*.agent.md
  • 28 skills in .github/skills/*/SKILL.md
  • Full patterns in AGENTS.md, quick overview in CONTEXT.md
  • Code patterns in docs/development/CODE_PATTERNS.md
  • Past solved tasks in docs/development/TASK_LOG.md
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. 1mo ago First seen · 28 lines · 305 tokens per session scan A 5eb70cde27bf

Subscribe to this mod's changes

cursorrules is a cursor rule published in the GitHub repository equinor/neqsim (158 stars, last pushed today), licensed Apache-2.0. It adds 305 tokens to every session, about $0.0012 per session on Opus 5.5. 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.