web-js

web-js is a cursor rule for Cursor from supertokens/create-supertokens-app. It costs 0 tokens per session (1,386 once invoked), scanned A, original, Apache-2.0.

A Cursor rule containing WebJS examples for configuring SuperTokens, a library for user sign-in and sessions in web applications. The examples cover email, phone, passwordless, and third-party sign-in flows.

In plain words
What is it for?
Guiding web JavaScript changes involving SuperTokens sign-in, passwordless access, linked accounts, and providers such as GitHub or Google.
Why use it?
It gives the agent project-specific code patterns for authentication instead of requiring it to infer the expected setup.

Cursor rule for Cursor

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.

agentmods
npx agentmods add rules/supertokens/create-supertokens-app/web-js
Clone the repo
git clone --depth 1 https://github.com/supertokens/create-supertokens-app

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.

agentmods badge for web-js

README.md
[![agentmods](https://agentmods.dev/badge/rules/supertokens/create-supertokens-app/web-js.svg)](https://agentmods.dev/rules/supertokens/create-supertokens-app/web-js)
Your own site
<a href="https://agentmods.dev/rules/supertokens/create-supertokens-app/web-js"><img src="https://agentmods.dev/badge/rules/supertokens/create-supertokens-app/web-js.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 1,386 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.01386
Opus 5 $0.00000 $0.00693
Sonnet 5 $0.00000 $0.00277
Haiku 4.5 $0.00000 $0.00139

Measured 4d ago against content hash 828b4d1dd821, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

web-js 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 4d 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/web-js.mdc · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

WebJS

factor webjs imports webjs inits
emailpassword import SuperTokens from "supertokens-web-js"; (window as any).supertokensUIEmailPassword.init(),
thirdparty import SuperTokens from "supertokens-web-js"; (window as any).supertokensUIThirdParty.init({ signInAndUpFeature: { providers: [ (window as any).supertokensUIThirdParty.Github.init(), (window as any).supertokensUIThirdParty.Google.init(), (window as any).supertokensUIThirdParty.Apple.init(), (window as any).supertokensUIThirdParty.Twitter.init(), ], }, }),
link_email import Session from "supertokens-web-js/recipe/session"; (window as any).supertokensUIPasswordless.init({ contactMethod: "EMAIL_OR_PHONE", }),
link_phone import Session from "supertokens-web-js/recipe/session"; (window as any).supertokensUIPasswordless.init({ contactMethod: "EMAIL_OR_PHONE", }),
otp_phone import Session from "supertokens-web-js/recipe/session"; (window as any).supertokensUIPasswordless.init({ contactMethod: "EMAIL_OR_PHONE", }),
otp_email import Session from "supertokens-web-js/recipe/session"; (window as any).supertokensUIPasswordless.init({ contactMethod: "EMAIL_OR_PHONE", }),
totp import SuperTokens from "supertokens-web-js"; (window as any).supertokensUITOTP.init(), (window as any).supertokensUISession.init(),

Read the full file on GitHub · 127 lines

Changes

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.

  1. 4d ago First seen · 127 lines · 0 tokens per session scan A 828b4d1dd821

Subscribe to this mod's changes

web-js is a cursor rule published in the GitHub repository supertokens/create-supertokens-app (24 stars, last pushed 4mo ago), licensed Apache-2.0. It costs nothing until one of its globs matches a file; then it loads 1,386 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 2026-09-01.