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build-tools-tests

build-tools-tests is a skill for Claude Code from umbraco/Umbraco-MCP-Base. It costs 38 tokens per session (5,820 once invoked), scanned A, original, MIT.

A generator for integration tests for collections of MCP tools. Integration tests check that tools work correctly with the surrounding server and services.

In plain words
What is it for?
Use it after building Umbraco MCP tools to create test setup, builders, helpers, and collection-specific integration tests. It works only within test directories.
Why use it?
Writing the setup, test helpers, and repeated test structures by hand takes time and can lead to inconsistent coverage. This creates those test files from the project's discovered tool collections.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is import { getYourAPI } from "../../../api/generated/yourApi.js";.

Part of the umbraco-mcp-skills plugin — 13 skills, 7 agents shipped together

not rated 2repo changed today A scan 38 tokens original MIT

Good fit Use it after building Umbraco MCP tools to create test setup, builders, helpers, and collection-specific integration tests. It works only within test directories.

Compare 6 skills from other repositories ↓
View source ↗ umbraco/Umbraco-MCP-Base
Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/umbraco/Umbraco-MCP-Base
agentmods
npx agentmods add skills/umbraco/umbraco-mcp-base/build-tools-tests

Made for: Claude Code.

Or install umbraco-mcp-skills, the plugin that ships this one along with the rest of its 13 skills, 7 agents.

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 build-tools-tests

README.md
[![agentmods](https://agentmods.dev/badge/skills/umbraco/umbraco-mcp-base/build-tools-tests/github.svg)](https://agentmods.dev/skills/umbraco/umbraco-mcp-base/build-tools-tests)
Your own site
<a href="https://agentmods.dev/skills/umbraco/umbraco-mcp-base/build-tools-tests"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-mcp-base/build-tools-tests/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 build-tools-tests

Your own site · 80×15
<a href="https://agentmods.dev/skills/umbraco/umbraco-mcp-base/build-tools-tests"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-mcp-base/build-tools-tests.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 38 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,820 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 $0.00038 $0.05820
Opus 5.5 $0.00015 $0.02328
Sonnet 5.5 $0.00008 $0.01164
Haiku 4.5 $0.00004 $0.00582

Measured today against content hash 21d951dcf24b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build-tools-tests 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 today.

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.

plugins/umbraco-mcp-skills/skills/build-tools-tests/SKILL.md · 574 lines

How it starts

The opening of the file, as written. The whole thing — 574 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build Tests

Generate integration tests for MCP tool collections created by /build-tools. This skill reads .discover.json and the existing tool files, then builds test infrastructure and test files one collection at a time.

IMPORTANT: This skill ONLY creates files inside __tests__/ directories — test files, setup, builders, and helpers. Do NOT create or modify ANY other files. This means: no tool files, no collection indexes, no registrations, no API client files (src/umbraco-api/api/), no generated code (src/umbraco-api/api/generated/), no mock handlers (src/mocks/). If existing code doesn't support what you need, work within the constraints — do not modify it.

Prerequisites

Before running, ensure:

  1. You have run /build-tools (tool collections exist in src/umbraco-api/tools/)
  2. The project compiles: npm run compile
  3. The Umbraco instance is running
  4. An API user exists — remind the user: "You need to create an API user via the Umbraco backoffice UI: Settings > Users, with Client ID umbraco-back-office-mcp and Client Secret 1234567890"

Arguments

  • No arguments: build tests for all collections from .discover.json
  • Single collection name: build tests only for that collection (e.g. /build-tools-tests form)

Agents

This skill orchestrates the following agents — use them for the relevant steps:

Agent When to use
test-builder-helper-creator Creating builders and helpers (Steps 4-5)
integration-test-creator Creating test files (Step 7)
integration-test-validator Validating test quality (Step 8)

Critical Rules

ONE FILE AT A TIME. This applies to ALL files — builders, helpers, builder tests, and tool tests. After creating any file:

  1. Compile: npm run compile
  2. If it has tests, run just that file: node --experimental-vm-modules node_modules/jest/bin/jest.js --runInBand path/to/file.test.ts (not npm test -- <path>: the test script already passes --testPathPatterns=__tests__, and Jest ORs a positional path with it, so that runs every __tests__ file)
  3. Fix any failures
  4. Only then create the next file

Read the full file on GitHub · 574 lines

Files

What ships with it

1 file 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.

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. today Changed 21d951dcf24b
  2. 22d ago Changed · +8 lines 39d75d571638
  3. 2mo ago First seen · 566 lines · 38 tokens per session scan A 50797b6ee222

Subscribe to this mod's changes

build-tools-tests is a skill published in the GitHub repository umbraco/Umbraco-MCP-Base (2 stars, last pushed yesterday), licensed MIT. It adds 38 tokens to every session and 5,820 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.

Testing
Related

build-tools-tests compared with skills from other repositories

build-tools-tests next to 6 skills from other repositories
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