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.
npx agentmods add rules/sunnykgupta/ai-helpers/typescriptgit clone --depth 1 https://github.com/sunnykgupta/AI-HelpersWhat 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 | $0.00000 | $0.00360 |
| Opus 5 | $0.00000 | $0.00180 |
| Sonnet 5 | $0.00000 | $0.00072 |
| Haiku 4.5 | $0.00000 | $0.00036 |
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 3d 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.
What it actually says
TypeScript Conventions
These rules apply only to .ts and .tsx files. They extend (not override) the baseline rules in project-always.mdc.
Types
- Enable
strictmode intsconfig.json; never disablestrictNullChecks. - Prefer
typealiases for unions, intersections, and mapped types; useinterfacefor object shapes that may be extended. - No
any— useunknownand narrow with type guards instead. - No non-null assertions (
!) — handle nullability explicitly. - Export all domain types from a single barrel file (e.g.
types/index.ts). - Avoid
astype casts; if a cast is unavoidable, add a comment explaining why.
Functions & Modules
- Prefer named exports over default exports for easier rename-refactoring.
- Avoid
namespace— use ES modules (import/export) instead. - Mark callbacks and event handlers
asynconly if they actuallyawaitsomething.
Null / Undefined Handling
- Prefer
undefinedovernullin new code;nullonly when interfacing with APIs that return it. - Use optional chaining (
?.) and nullish coalescing (??) rather than||guards.
Linting & Formatting
- Use
eslintwith@typescript-eslint/recommended; do not suppress rules without a comment. - Format with
prettier; do not mixprettierand manual style fixes in the same commit. - Run
tsc --noEmitas part of the lint step.
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.
- 3d ago First seen · 38 lines · 0 tokens per session scan A 0006b2481d06
typescript is a cursor rule published in the GitHub repository sunnykgupta/AI-Helpers (70 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 360 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.
Other cursor rules, from other repositories
as-contract-cast-smell
// ❌ WRONG — bypasses the family ContractSerializer seam const contract = JSON.parse(raw) as Contract; const contract = JSON.parse(raw) as Contract .
no-barrel-files
Avoid barrel files and unnecessary re-exports.
vue-typescript-patterns
Cursor rule "vue-typescript-patterns" from soaring-xiongkulu/easyaiot, covering vue3 + typescript 开发规范, vue 组件规范, vue sfc 组件规范, typescript 规范 and 状态管理.
project-overview
这是一个基于 uniapp + Vue3 + TypeScript + Vite5 + UnoCSS 的跨平台开发框架。.
compose-resource-lifecycles-with-layermerge
Cursor rule "compose-resource-lifecycles-with-layermerge" from PaulJPhilp/EffectPatterns, covering compose resource lifecycles with layer.merge and example.
frontend-patterns
React/TypeScript patterns for src/ code.