Borrowing it
Nothing to install: this file belongs to beel-collab/presets.dev. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/beel-collab/presets.dev/main/release/nodejs/native/copilot/.github/instructions/nodejs.instructions.mdgit 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/instructions/beel-collab/presets.dev/nodejs)<a href="https://agentmods.dev/instructions/beel-collab/presets.dev/nodejs"><img src="https://agentmods.dev/badge/instructions/beel-collab/presets.dev/nodejs/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/instructions/beel-collab/presets.dev/nodejs"><img src="https://agentmods.dev/badge/instructions/beel-collab/presets.dev/nodejs.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 | $0.00802 | $0.00802 |
| Opus 5.5 | $0.00321 | $0.00321 |
| Sonnet 5.5 | $0.00160 | $0.00160 |
| Haiku 4.5 | $0.00080 | $0.00080 |
Grade A, and why
presets.dev nodejs.instructions.md 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 — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Node.js Copilot Instructions: ESM, Cancellation and Streams
Path-specific Copilot instructions for Node.js. They apply through applyTo and leave .github/copilot-instructions.md in place.
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.
Errors and security
Validate body size, content type, and schema before you use the payload. Return a status and a small error body. Do not put a stack trace in the response.
Secrets come from the environment. Do not log Authorization headers or cookies. A child process does not interpolate user input into a shell string.
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 · 71 lines · 802 tokens per session scan A 1375161d0baf
presets.dev nodejs.instructions.md is an instructions file published in the GitHub repository beel-collab/presets.dev (3 stars, last pushed yesterday), licensed MIT. It adds 802 tokens to every session, about $0.0032 per session on Opus 5.5. 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.
presets.dev nodejs.instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| presets.dev nodejs.instructions.mdbeel-collab/presets.dev | Instructions file | 3 | yesterday | MIT | A | 802 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,685 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,086 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 280k | 2d ago | MIT | A | 4,325 | Codex, OpenCode |