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/typescript-rules)<a href="https://agentmods.dev/rules/beel-collab/presets.dev/typescript-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/typescript-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/typescript-rules"><img src="https://agentmods.dev/badge/rules/beel-collab/presets.dev/typescript-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 | $0.01276 |
| Opus 5.5 | $0.00000 | $0.00510 |
| Sonnet 5.5 | $0.00000 | $0.00255 |
| Haiku 4.5 | $0.00000 | $0.00128 |
Grade A, and why
typescript-rules 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 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.
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 — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.
TypeScript Rules for Cursor: Strict Types and Runtime Checks
Install
Install the native export at .cursor/rules/typescript-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.
TypeScript Rules for Cursor: Strict Types and Runtime Checks
File-scoped Cursor rule for TypeScript. It attaches when a matching file is in context.
Updated for TypeScript 7.0.2, Nov 2026
Do not upgrade dependencies or the framework version unless the task asks.
Project shape
tsconfig.json is the source of truth. Preserve strict if it is on. Do not add a second config that weakens it for convenience. Path aliases, module, and moduleResolution stay as the project set them. Match the existing file layout.
A type-only import uses import type when the project is on verbatimModuleSyntax or already writes it that way. Do not import a type in a position that emits a runtime import the bundler will fail.
Types that match the data
Model a finite set with a discriminated union and a switch that is exhaustive. Prefer unknown at a boundary and narrow it. any turns the checker off for everything it touches. A cast with as is a claim that you know more than the checker. Use it only after a runtime check, and keep the cast next to that check.
Optional fields and null are different. Do not paper over both with !. Handle the missing case.
Generics stay small. A function with three unconstrained type parameters is usually a dict in disguise. Name the constraint.
Runtime checks
The checker disappears at build time. Parse JSON, form data, query strings, and environment variables with the validator the project already uses. The type of a parsed value is the validator's output, not a hand-written interface that can drift.
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 · 114 lines · 0 tokens per session scan A 3127a24ceadf
typescript-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 1,276 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 2026-11-13.
typescript-rules compared with cursor rules from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| typescript-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 |