What is programar-inmutable?

A testing rule that creates temporary test data for each test instead of changing shared data, and requires measured evidence for claims.

Use it when writing tests with disposable fixtures and when reporting whether code is ready, faster, or covered by tests.

It prevents one test from changing the state seen by another and avoids treating unfinished or pending data as a denial, empty result, or zero.

programar-inmutable — Cursor rule for Cursor by LeandroPG19/Memorys

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/LeandroPG19/Memorys

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.

README.md

[![agentmods](https://agentmods.dev/badge/rules/leandropg19/memorys/programar-inmutable/github.svg)](https://agentmods.dev/rules/leandropg19/memorys/programar-inmutable)

Your own site

<a href="https://agentmods.dev/rules/leandropg19/memorys/programar-inmutable"><img src="https://agentmods.dev/badge/rules/leandropg19/memorys/programar-inmutable/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.

Your own site · 80×15

<a href="https://agentmods.dev/rules/leandropg19/memorys/programar-inmutable"><img src="https://agentmods.dev/badge/rules/leandropg19/memorys/programar-inmutable.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 163 This file is loaded in full into every session.

When invoked 163 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.

Model	Per session	Once invoked
Fable 5.1	$0.00163	$0.00163
Opus 5.5	$0.00065	$0.00065
Sonnet 5.5	$0.00033	$0.00033
Haiku 4.5	$0.00016	$0.00016

Measured 22d ago against content hash 0300b74c9d19, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

programar-inmutable 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 22d 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/programar-inmutable.mdc · 12 lines

What it actually says