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.
git clone --depth 1 https://github.com/PaulJPhilp/EffectPatternsWrote 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.
[](https://agentmods.dev/rules/pauljphilp/effectpatterns/create-a-managed-runtime-for-scoped-resources)<a href="https://agentmods.dev/rules/pauljphilp/effectpatterns/create-a-managed-runtime-for-scoped-resources"><img src="https://agentmods.dev/badge/rules/pauljphilp/effectpatterns/create-a-managed-runtime-for-scoped-resources/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.
<a href="https://agentmods.dev/rules/pauljphilp/effectpatterns/create-a-managed-runtime-for-scoped-resources"><img src="https://agentmods.dev/badge/rules/pauljphilp/effectpatterns/create-a-managed-runtime-for-scoped-resources.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00263 | $0.00263 |
| Opus 5.5 | $0.00105 | $0.00105 |
| Sonnet 5.5 | $0.00053 | $0.00053 |
| Haiku 4.5 | $0.00026 | $0.00026 |
Grade A, and why
create-a-managed-runtime-for-scoped-resources 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.
What it actually says
description: Create a managed runtime for scoped resources. globs: "**/*.ts" alwaysApply: true
Create a Managed Runtime for Scoped Resources
Rule: Create a managed runtime for scoped resources.
Example
import { Effect, Layer } from "effect";
class DatabasePool extends Effect.Service<DatabasePool>()("DbPool", {
effect: Effect.gen(function* () {
yield* Effect.log("Acquiring pool");
return {
query: () => Effect.succeed("result"),
};
}),
}) {}
// Create a program that uses the DatabasePool service
const program = Effect.gen(function* () {
const db = yield* DatabasePool;
yield* Effect.log("Using DB");
yield* db.query();
});
// Run the program with the service implementation
Effect.runPromise(
program.pipe(Effect.provide(DatabasePool.Default), Effect.scoped)
);
Explanation:
Layer.launch ensures that resources are acquired and released safely, even
in the event of errors or interruptions.
Explanation:
Layer.launch is designed for resource safety. It acquires all resources,
provides them to your effect, and—crucially—guarantees that all registered
finalizers are executed upon completion or interruption.
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.
- 1mo ago First seen · 42 lines · 263 tokens per session scan A 59ae4438ac7a
create-a-managed-runtime-for-scoped-resources is a cursor rule published in the GitHub repository PaulJPhilp/EffectPatterns (807 stars, last pushed 4mo ago), licensed MIT. It adds 263 tokens to every session, about $0.0011 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 2026-09-03.
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