typescript

A rule for keeping generated and domain-specific TypeScript imports behind canonical modules, which are the project-approved import paths. It also requires typed contracts at boundaries and rejects loosely typed unknown values early.

In plain words
What is it for?
Use it when writing or reviewing TypeScript imports, generated code, and data passed between parts of the application.
Why use it?
It prevents imports from spreading across implementation details and catches unsafe data at the edges of the system.

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/regenrek/agentrig/typescript
Clone the repo
git clone --depth 1 https://github.com/regenrek/agentrig

Made for: Cursor.

Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 34 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 $0.00011 $0.00034
Opus 5 $0.00005 $0.00017
Sonnet 5 $0.00002 $0.00007
Haiku 4.5 $0.00001 $0.00003

Measured yesterday against content hash 0f8fc3c6b321, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript 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 yesterday.

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.

packages/sdk/tests/fixtures/dots-like/.cursor/rules/typescript.mdc · 8 lines

What it actually says

Use typed contracts at boundaries and reject loose unknown values early.

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. yesterday First seen · 8 lines · 11 tokens per session scan A 0f8fc3c6b321

Subscribe to this mod's changes

typescript is a cursor rule published in the GitHub repository regenrek/agentrig (23 stars, last pushed 18d ago), licensed MIT. It adds 11 tokens to every session and 34 once invoked, about $0.0001 per session on Opus 5. 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.