typescript-standards

TypeScript Standards and Conventions.

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/sushaantu/boxento/typescript-standards
Clone the repo
git clone --depth 1 https://github.com/sushaantu/boxento

Made for: Cursor.

Per session 174 This file is loaded in full into every session.
When invoked 174 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00174 $0.00174
Opus 5 $0.00087 $0.00087
Sonnet 5 $0.00035 $0.00035
Haiku 4.5 $0.00017 $0.00017

Measured today against content hash aa812183d726, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

typescript-standards 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.

.cursor/rules/typescript-standards.mdc · 17 lines

What it actually says

  • Always use TypeScript for all new code and migrations
  • Enforce strict type checking with strict: true in tsconfig
  • Use explicit return types on functions and methods
  • Prefer interfaces over type aliases for object definitions
  • Use enums for fixed sets of values
  • Leverage TypeScript's utility types when appropriate
  • Use named exports rather than default exports for better tree-shaking
  • Define reusable types in dedicated type files within the types/ directory
  • Use React.FC for component typing with explicit props interface
  • Avoid using 'any' type; use 'unknown' when type is truly uncertain
  • Define parameter and return types for all async functions
  • Use type guards for narrowing types when appropriate
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. today First seen · 17 lines · 174 tokens per session scan A aa812183d726

Subscribe to this mod's changes

typescript-standards is a cursor rule published in the GitHub repository sushaantu/boxento (153 stars, last pushed 20d ago), licensed MIT. It adds 174 tokens to every session, about $0.0009 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 2026-09-01.