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/GoranErhartic/cursor-development-rulesWrote 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/goranerhartic/cursor-development-rules/nodejs-lambda)<a href="https://agentmods.dev/rules/goranerhartic/cursor-development-rules/nodejs-lambda"><img src="https://agentmods.dev/badge/rules/goranerhartic/cursor-development-rules/nodejs-lambda/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/goranerhartic/cursor-development-rules/nodejs-lambda"><img src="https://agentmods.dev/badge/rules/goranerhartic/cursor-development-rules/nodejs-lambda.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 | $0.01358 |
| Opus 5.5 | $0.00000 | $0.00543 |
| Sonnet 5.5 | $0.00000 | $0.00272 |
| Haiku 4.5 | $0.00000 | $0.00136 |
Grade A, and why
nodejs-lambda 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Node.js + AWS Lambda Development Guide
Stack
| Layer | Technology |
|---|---|
| Runtime | Node.js 22, TypeScript 5.7 |
| Infrastructure | AWS CDK |
| Services | Lambda, DynamoDB, SQS, SNS, EventBridge, API Gateway HTTP API, S3, OpenSearch, RDS Proxy |
| Middleware | Middy v7 |
| Observability | Powertools Logger, Metrics, Tracer |
| Validation | Zod |
| Testing | Vitest 4, aws-sdk-client-mock, LocalStack 3.x |
| Build | esbuild (Node 22 target) |
| Package Manager | pnpm |
Rule Routing
Consult these rules based on what you are working on:
Quick Reference
- Build/modify Lambda handler:
languages/aws-lambda/lambda-handlers.mdc,languages/aws-lambda/error-handling.mdc,languages/nodejs/validation.mdc - Build queue consumer:
languages/aws-lambda/sqs-processing.mdc,languages/aws-lambda/idempotency.mdc,languages/aws-lambda/powertools-batch.mdc - Update CDK stack:
languages/aws-lambda/cdk-infrastructure-lambda.mdc,languages/aws-lambda/cdk-infrastructure-data.mdc,languages/aws-lambda/cdk-testing.mdc - Improve observability:
languages/aws-lambda/logging-setup.mdc,languages/aws-lambda/logging-tracing.mdc,languages/aws-lambda/monitoring.mdc
Lambda Functions
- Handler patterns, Middy v7 middleware chain, cold start optimization, memory/timeout tuning →
languages/aws-lambda/lambda-handlers.mdc - API Gateway HTTP API integration →
languages/aws-lambda/api-gateway-http-api.mdc - SQS consumers, partial batch failures →
languages/aws-lambda/sqs-processing.mdc - SNS publishing, fan-out →
languages/aws-lambda/sns-events.mdc - EventBridge events →
languages/aws-lambda/eventbridge.mdc - Powertools batch processing →
languages/aws-lambda/powertools-batch.mdc
Data & Storage
- DynamoDB single-table design, GSIs, batch ops, optimistic locking →
languages/aws-lambda/dynamodb.mdc - DynamoDB Streams, event-driven sync (e.g. OpenSearch) →
languages/aws-lambda/dynamodb-streams.mdc - RDS Proxy, Prisma, connection pooling →
languages/aws-lambda/rds-proxy.mdc - OpenSearch queries, bulk indexing →
languages/aws-lambda/opensearch.mdc - S3 presigned URLs →
languages/aws-lambda/s3-presigned-urls-upload.mdc,s3-presigned-urls-download.mdc,s3-presigned-urls-validation.mdc,s3-presigned-urls-cdk-client.mdc
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 · 90 lines · 0 tokens per session scan A 3c7b4e0a2f14
nodejs-lambda is a cursor rule published in the GitHub repository GoranErhartic/cursor-development-rules (19 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,358 tokens. 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.
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