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 umbraco/Umbraco-MCP-Base --skill add-testgit clone --depth 1 https://github.com/umbraco/Umbraco-MCP-BaseWrote 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/umbraco/umbraco-mcp-base/add-test)<a href="https://agentmods.dev/skills/umbraco/umbraco-mcp-base/add-test"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-mcp-base/add-test/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/umbraco/umbraco-mcp-base/add-test"><img src="https://agentmods.dev/badge/skills/umbraco/umbraco-mcp-base/add-test.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 | $0.00044 | $0.01291 |
| Opus 5 | $0.00022 | $0.00646 |
| Sonnet 5 | $0.00009 | $0.00258 |
| Haiku 4.5 | $0.00004 | $0.00129 |
Grade A, and why
add-test 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 12d 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.
How it starts
The opening of the file, as written. The whole thing — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Add Test
Add an integration test for a specific tool in an existing collection. This skill creates a single test file following the collection's established test patterns.
Use this skill when:
- You added a new tool with
/add-tooland want to test it separately - You manually created or modified a tool and need a test
- You deleted a test and need to recreate it
/build-tools-testsskipped the collection because tests already exist
Prerequisites
Before running, ensure:
- The collection exists (
src/umbraco-api/tools/{collection}/index.ts) - The test infrastructure exists (
src/umbraco-api/tools/{collection}/__tests__/setup.ts) — if not, tell the user to run/build-tools-tests {collection}first - The project compiles:
npm run compile - The Umbraco instance is running
- 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-mcpand Client Secret1234567890"
Arguments
- Collection name (required): the collection containing the tool (e.g.
/add-test form) - Tool name (optional): the specific tool to test (e.g.
/add-test form copy-form)
If no tool name is provided, compare the tools in the collection index against existing test files and present the untested tools to the user.
Agents
| Agent | When to use |
|---|---|
integration-test-creator |
Creating the test file (Step 3) |
integration-test-validator |
Validating the test (Step 4) |
Critical Rules
TEST INFRASTRUCTURE MUST EXIST. This skill does not create setup.ts, builders, or helpers. If they don't exist, tell the user to run /build-tools-tests {collection} first.
ONE FILE AT A TIME. Create one test file, compile, run, fix. Then move to the next if testing multiple tools.
RUN COMMANDS SEPARATELY. Always run compile and test as separate Bash calls. Never chain with &&.
REAL API — NO MOCKING. These are integration tests against a real Umbraco instance. Do NOT create mock infrastructure.
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.
- 12d ago First seen · 129 lines · 44 tokens per session scan A 7d59c5a74f28
add-test is a skill published in the GitHub repository umbraco/Umbraco-MCP-Base (2 stars, last pushed yesterday), licensed MIT. It adds 44 tokens to every session and 1,291 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 2026-08-31.
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