strict-typescript-mode

strict-typescript-mode is a skill for Claude Code, Codex from Svenja-dev/claude-code-skills. It costs 49 tokens per session (1,039 once invoked), scanned A, original, no licence file.

A coding rule set for TypeScript, the language used to add types to JavaScript. It applies strict typing, rejects use of `any`, and suggests limits on generic types.

In plain words
What is it for?
Use it when editing TypeScript or TSX files, adding features, or reviewing code.
Why use it?
It helps catch unclear or unsafe types while code is being written or reviewed. This reduces type-related mistakes and inconsistent TypeScript practices.

Skill for Claude CodeCodex

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 skills/svenja-dev/claude-code-skills/strict-typescript-mode
Any agent
npx skills add Svenja-dev/claude-code-skills --skill strict-typescript-mode
Clone the repo
git clone --depth 1 https://github.com/Svenja-dev/claude-code-skills

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for strict-typescript-mode

README.md
[![agentmods](https://agentmods.dev/badge/skills/svenja-dev/claude-code-skills/strict-typescript-mode.svg)](https://agentmods.dev/skills/svenja-dev/claude-code-skills/strict-typescript-mode)
Your own site
<a href="https://agentmods.dev/skills/svenja-dev/claude-code-skills/strict-typescript-mode"><img src="https://agentmods.dev/badge/skills/svenja-dev/claude-code-skills/strict-typescript-mode.svg" alt="Measured on agentmods" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,039 The whole file, excluding the scripts and references it only reads on demand.
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 $0.00049 $0.01039
Opus 5 $0.00024 $0.00519
Sonnet 5 $0.00010 $0.00208
Haiku 4.5 $0.00005 $0.00104

Measured 5d ago against content hash ca7498224749, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

strict-typescript-mode 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 5d 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.

skills/strict-typescript-mode/SKILL.md · 166 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 5d ago First seen · 166 lines · 49 tokens per session scan A ca7498224749

Subscribe to this mod's changes

strict-typescript-mode is a skill published in the GitHub repository Svenja-dev/claude-code-skills (38 stars, last pushed 3mo ago), with no licence file. It adds 49 tokens to every session and 1,039 once invoked, about $0.0002 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.

Related

Other skills, from other repositories

lint-js

Lint JS/TS code only. Use before opening a PR when only JavaScript or TypeScript files were changed (no Rust).

denoland/deno · 29 tokens

dd-code-generation

Use pup CLI for immediate Datadog operations or generate code for integration into applications.

DataDog/pup · 16 tokens

fast-typescript-check

Keep www-sacred's TypeScript fast to type-check and fast to run. Use when touching the ASCII/canvas animation components (the only real per-frame code here), tightening type-check wall-clock, or auditing a change for runtime or compiler regressions. Scoped to this repo — a React 19 / Next.js 16 component library plus…

internet-development/www-sacred · 84 tokens

migrate-better-result-3

Migrate a TypeScript codebase from better-result 2.x to 3.0. Use when upgrading better-result across the TaggedError syntax, removed Result serialization helpers, recovery inference, matching, or retry APIs.

dmmulroy/better-result · 52 tokens

typescript-magician

Designs complex generic types, refactors any types to strict alternatives, creates type guards and utility types, and resolves TypeScript compiler errors. Use when the user asks about TypeScript (TS) types, generics, type inference, type guards, removing any types, strict typing, type errors, infer, extends…

mcollina/skills · 108 tokens

create-gsd-extension

Create, debug, and iterate on GSD extensions (TypeScript modules adding tools, commands, event hooks, custom UI, and providers). Use when asked to build an extension, add a tool the LLM can call, register a slash command, hook into GSD events, create custom TUI components, or modify GSD behavior. Triggers on…

open-gsd/gsd-pi · 101 tokens