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 skills add SpillwaveSolutions/mastering-typescript-skill --skill mastering-typescriptgit clone --depth 1 https://github.com/SpillwaveSolutions/mastering-typescript-skillWrote 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/skills/spillwavesolutions/mastering-typescript-skill/mastering-typescript)<a href="https://agentmods.dev/skills/spillwavesolutions/mastering-typescript-skill/mastering-typescript"><img src="https://agentmods.dev/badge/skills/spillwavesolutions/mastering-typescript-skill/mastering-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/skills/spillwavesolutions/mastering-typescript-skill/mastering-typescript"><img src="https://agentmods.dev/badge/skills/spillwavesolutions/mastering-typescript-skill/mastering-typescript.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00133 | $0.02960 |
| Opus 5.5 | $0.00053 | $0.01184 |
| Sonnet 5.5 | $0.00027 | $0.00592 |
| Haiku 4.5 | $0.00013 | $0.00296 |
Grade A, and why
mastering-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.
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.
What ships with it
9 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- assets/eslint-template.js 2.1 KB runs code
- assets/tsconfig-template.json 1.1 KB
- references/enterprise-patterns.md 12 KB
- references/generics.md 11 KB
- references/nestjs-integration.md 14 KB
- references/react-integration.md 13 KB
- references/toolchain.md 11 KB
- references/type-system.md 9.8 KB
- scripts/validate-setup.sh 5.6 KB runs code
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 · 442 lines · 133 tokens per session scan A 349d0780f62f
mastering-typescript is a skill published in the GitHub repository SpillwaveSolutions/mastering-typescript-skill (31 stars, last pushed 9mo ago), with no licence file. It adds 133 tokens to every session and 2,960 once invoked, about $0.0005 per session on Opus 5.5. 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.
Other skills, from other repositories
mastering-typescript
This skill should be used when the user asks to "write typescript", "configure typescript project", "add type hints", "use generics", "migrate to typescript", "set up vite with typescript", "implement type-safe patterns", "use satisfies operator", "configure eslint for typescript", or needs guidance on enterprise…
langgraph-docs
Fetches and references LangGraph Python documentation to build stateful agents, create multi-agent workflows, and implement human-in-the-loop patterns. Use when the user asks about LangGraph, graph agents, state machines, agent orchestration, LangGraph API, or needs LangGraph implementation guidance.
typescript-language
Apply modern TypeScript standards for type safety and maintainability. Use when working with types, interfaces, generics, enums, unions, or tsconfig settings.
better-auth
Skill for integrating Better Auth - comprehensive TypeScript authentication framework for Cloudflare D1, Next.js, Nuxt, and 15+ frameworks. Use when adding auth, encountering D1 adapter errors, or implementing OAuth/2FA/RBAC features.
nestjs
Use when building or structuring a NestJS backend — feature modules, providers and DI wiring, provider scopes and request-lifecycle order, where to bind guards/pipes/interceptors/filters, and testing with Test.createTestingModule. NOT a bare Express/Fastify service with no DI (that is nodejs), NOT framework-agnostic…
bun-hot-reloading
Use when implementing hot reloading with Bun (--hot, --watch), HMR, or automatic code reloading during development. Covers watch mode, hot mode, and HTTP server reload.