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/kensaurus/cursor-kenjiWrote 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/kensaurus/cursor-kenji/typescript)<a href="https://agentmods.dev/rules/kensaurus/cursor-kenji/typescript"><img src="https://agentmods.dev/badge/rules/kensaurus/cursor-kenji/typescript/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/kensaurus/cursor-kenji/typescript"><img src="https://agentmods.dev/badge/rules/kensaurus/cursor-kenji/typescript.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 | $0.00330 |
| Opus 5.5 | $0.00000 | $0.00132 |
| Sonnet 5.5 | $0.00000 | $0.00066 |
| Haiku 4.5 | $0.00000 | $0.00033 |
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 1mo 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
Strict Mode
- No
any— useunknown+ type guards or Zod validation - No type assertions (
as) without prior validation - Exhaustive switch statements with
nevercheck - Strict null checks — handle
nullandundefinedexplicitly
Type Patterns
- Derive types from Zod schemas:
type User = z.infer<typeof UserSchema> - Use discriminated unions for state:
{ status: 'loading' } | { status: 'success', data: T } - Prefer
interfacefor object shapes,typefor unions and intersections - Export types near their usage (in feature's
types.ts)
Validation
- All external data (API responses, form inputs, URL params) validated with Zod
- Server Actions: validate with
schema.safeParse(), returnActionResult<T> - API routes: validate body/params with Zod before processing
Action Result Pattern
type ActionResult<T> =
| { success: true; data: T }
| { success: false; error: string; fieldErrors?: Record<string, string[]> }
Imports
- Use
@/path aliases (configured in tsconfig.json) - Never use relative imports beyond one level (
../is ok,../../..is not) - Group imports: external libs → internal modules → types → styles
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.
- 1mo ago First seen · 37 lines · 0 tokens per session scan A 8c3e13bfc975
typescript is a cursor rule published in the GitHub repository kensaurus/cursor-kenji (9 stars, last pushed 17d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 330 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 2026-09-03.
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