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/beel-collab/presets.devWrote 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/beel-collab/presets.dev/nodejs-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/nodejs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nodejs-rules/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/beel-collab/presets.dev/nodejs-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/nodejs-rules.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 | $0.00000 | $0.01131 |
| Opus 5.5 | $0.00000 | $0.00452 |
| Sonnet 5.5 | $0.00000 | $0.00226 |
| Haiku 4.5 | $0.00000 | $0.00113 |
Grade A, and why
nodejs-rules scanned grade A with 1 finding 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 today.
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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
const res = await fetch(url, { signal: AbortSignal.timeout(5_000) }) How it starts
The opening of the file, as written. The whole thing — 107 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Node.js Rules for Cursor: ESM, Cancellation and Streams
Install
Install the native export at .cursor/rules/nodejs-rules.mdc.
Copy that export, not this catalog file. Catalog fields such as tools and author are for presets.dev.
Install one skill file per name. Cursor, GitHub Copilot, Codex, Antigravity CLI, and Devin can all read .agents/skills, so a second copy with the same name collides.
Node.js Rules for Cursor: ESM, Cancellation and Streams
File-scoped Cursor rule for Node.js. It attaches when a matching file is in context.
Updated for Node.js 26.13.1 LTS, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Node.js 26.13.1 Lithium is the active LTS on nodejs.org. The newest dist tag is a v27 alpha. Do not target the alpha. Read engines and .nvmrc and stay on the line the project already runs. Do not bump Node because a newer LTS exists unless the task asks.
Project shape
Match the module system. A project with "type": "module" is ESM. Do not add a require in an ESM file or an import in a CommonJS file without the interop the project already uses. File extensions in ESM imports follow the local style.
Scripts, the test command, and the start command come from package.json. The lockfile is committed. Do not mix npm, pnpm, and yarn in one change.
Requests and cancellation
Every outbound call takes a timeout and an AbortSignal. When the request that triggered the work is aborted, abort the downstream calls. Do not retry without a cap, a delay, and a check that the signal is still active. A retry of a non-idempotent POST needs an explicit reason.
Handle unhandledRejection by failing the process or by catching at the boundary. An empty catch hides a broken request.
Streams and the event loop
A stream has a consumer that respects backpressure. Do not read() an unbounded upload into a single buffer. Pipe errors are handled on both sides.
Do not run CPU-heavy work, readFileSync on a large file, or a tight JSON parse of a huge payload on the request path. Move it off the request or bound the size. fs sync methods do not belong in a server handler.
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.
- today First seen · 107 lines · 0 tokens per session scan A e92c066d7a6e
nodejs-rules is a cursor rule published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,131 tokens. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-11-13.
nodejs-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nodejs-rulesbeel-collab/presets.dev | Cursor rule | 3 | yesterday | MIT | A | 0 | Cursor |
| ponytailDietrichGebert/ponytail | Cursor rule | 190k | 15d ago | MIT | A | 604 | Cursor |
| angular-20angular/angular | Cursor rule | 101k | today | MIT | A | 0 | Cursor |
| dev-standardapache/superset | Cursor rule | 76k | today | Apache-2.0 | A | 1,147 | Cursor |
| prefer-direct-imports-over-module-mocksprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| config-validation-and-normalizationprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |
| control-plane-descriptorsprisma/orm | Cursor rule | 48k | today | Apache-2.0 | A | 0 | Cursor |