mtk-agent-toolkit: Skill for Claude Code

.claude/skills/tech-stack-typescript/SKILL.md

tech-stack-typescript is a skill for Claude Code from moberghr/mtk-agent-toolkit. It costs 43 tokens per session (3,981 once invoked), scanned A, original, MIT.

Project guidance for TypeScript and JavaScript apps, covering common web, mobile, desktop, and server frameworks. It also provides the commands and patterns used to build and test them.

In plain words
What is it for?
Use it when building or testing React, React Native, Expo, Next.js, Tauri, Node.js, or JavaScript-only projects, including projects that use an ORM or a Rust desktop sidecar.
Why use it?
It gives coding workflows the right instructions for the project's language and framework instead of relying on generic advice.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: mentions Codex.

This is moberghr/mtk-agent-toolkit's own configuration. It tells Claude Code how to work on mtk-agent-toolkit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mtk-agent-toolkit configures →

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the mtk plugin — 33 skills, 7 agents, 6 hooks shipped together

Reuse

Borrowing it

Nothing to install: this file belongs to moberghr/mtk-agent-toolkit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/moberghr/mtk-agent-toolkit/main/.claude/skills/tech-stack-typescript/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/moberghr/mtk-agent-toolkit

Made for: Claude Code.

Or install mtk, the plugin that ships this one along with the rest of its 33 skills, 7 agents, 6 hooks.

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 tech-stack-typescript

README.md
[![agentmods](https://agentmods.dev/badge/skills/moberghr/mtk-agent-toolkit/tech-stack-typescript/github.svg)](https://agentmods.dev/skills/moberghr/mtk-agent-toolkit/tech-stack-typescript)
Your own site
<a href="https://agentmods.dev/skills/moberghr/mtk-agent-toolkit/tech-stack-typescript"><img src="https://agentmods.dev/badge/skills/moberghr/mtk-agent-toolkit/tech-stack-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.

agentmods 80×15 button for tech-stack-typescript

Your own site · 80×15
<a href="https://agentmods.dev/skills/moberghr/mtk-agent-toolkit/tech-stack-typescript"><img src="https://agentmods.dev/badge/skills/moberghr/mtk-agent-toolkit/tech-stack-typescript.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,981 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original 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 5.1 $0.00043 $0.03981
Opus 5.5 $0.00017 $0.01592
Sonnet 5.5 $0.00009 $0.00796
Haiku 4.5 $0.00004 $0.00398

Measured 16d ago against content hash 143bc73f64ef, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tech-stack-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 16d 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.

.claude/skills/tech-stack-typescript/SKILL.md · 239 lines

How it starts

The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tech Stack: TypeScript

Overview

TypeScript/JavaScript context for the workflow skills and review agents: commands, detection markers, the data-layer and framework rules that bite (React, React Native/Expo, Next.js, Tauri, Node), settings and scan recipes. Generic framework practice is assumed, not restated. JavaScript-only projects use the same skill; the type rules become recommendations.

When To Use

Loaded automatically when the active tech stack is typescript; never invoked directly.

Build & Test Commands

setup-bootstrap writes the detected package manager to .claude/tech-stack-pm; <pm> below is that value. Detection, first match wins:

if [ -f bun.lock ] || [ -f bun.lockb ]; then echo bun
elif [ -f pnpm-lock.yaml ]; then echo pnpm
elif [ -f yarn.lock ]; then echo yarn
else echo npm   # package-lock.json, or package.json only
fi
  • Install: <pm> install
  • Type check (compile-equivalent): <pm> run typecheck if defined in package.json, else npx tsc --noEmit --pretty false (or tsc -b for project references)
  • Build: <pm> run build (verifies full toolchain — bundler, type check, assets)
  • Test (batch): <pm> test <path/to/file> or <pm> run test -- <pattern> (vitest/jest support filter flags; check package.json scripts)
  • Test (full): <pm> test or <pm> run test
  • Bounded output is the default. Pass --reporter=dot (vitest) or --silent (jest) where the runner supports it. Batch checkpoints run these through bash scripts/mtk-verify-run.sh --label <batch-id>-<step> -- <cmd> — the wrapper's bounded tail is the evidence, the log path is the receipt.
  • Format: see ## Format Command.
  • Lint: <pm> run lint if defined, else npx eslint <path> or npx biome check <path> based on project config

Tauri (when src-tauri/ exists): from src-tauri/, cargo check (fast) or cargo build, cargo test, cargo fmt, cargo clippy -- -D warnings; full app <pm> run tauri dev / <pm> run tauri build.

Read the full file on GitHub · 239 lines

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. 16d ago Changed · -173 lines 143bc73f64ef
  2. 1mo ago Changed · +1 lines c5d78047e489
  3. 2mo ago First seen · 411 lines · 43 tokens per session scan A cec0f8cfdcae

Subscribe to this mod's changes

tech-stack-typescript is a skill published in the GitHub repository moberghr/mtk-agent-toolkit (9 stars, last pushed 8d ago), licensed MIT. It adds 43 tokens to every session and 3,981 once invoked, about $0.0002 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 2026-08-31.

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