skill-up is a tool for evaluating and improving Agent Skills through declarative test cases, multiple agent engines, configurable judges, and structured reports. Developers and agent builders use it locally or in continuous integration to measure skill quality and iterate on failures. The catalogue entries are skills and instructions that can be evaluated or evolved with it.
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.
git clone --depth 1 https://github.com/alibaba/skill-upInstalling this writes the configuration, not the program: `python3` runs a file from the repository, so clone it first and make the path in the command match where you put it.
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.
[](https://agentmods.dev/mcp/alibaba/skill-up/codex-skill-up-skill_up_observer)<a href="https://agentmods.dev/mcp/alibaba/skill-up/codex-skill-up-skill_up_observer"><img src="https://agentmods.dev/badge/mcp/alibaba/skill-up/codex-skill-up-skill_up_observer/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/mcp/alibaba/skill-up/codex-skill-up-skill_up_observer"><img src="https://agentmods.dev/badge/mcp/alibaba/skill-up/codex-skill-up-skill_up_observer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
skill_up_observer 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 22d 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.
What it actually says
{
"skill_up_observer": {
"command": "python3",
"args": [
"scripts/observer.py",
"mcp"
],
"cwd": "."
}
}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.
- 22d ago First seen · 10 lines scan A 20f5f6816dc6
skill_up_observer is an MCP server published in the GitHub repository alibaba/skill-up (1,217 stars, last pushed 2d ago), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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 2026-09-24.
Other mcp servers, from other repositories
docs-langchain
MCP server "docs-langchain", hosted remotely at docs.langchain.com, as configured in langchain-ai/langchain.
component-explorer
MCP server "component-explorer" as configured in microsoft/vscode. Launched with npm exec --no -- component-explorer mcp -p ./test/componentFixtures/component-ex.
vscode-automation-mcp
MCP server "vscode-automation-mcp" as configured in microsoft/vscode. Launched with npm --prefix test/mcp run start-stdio.
reference-langchain
MCP server "reference-langchain", hosted remotely at reference.langchain.com, as configured in langchain-ai/langchain.
playwright-test
A high-level API to automate web browsers. Runs locally from the playwright npm package.
supabase
Supabase's hosted MCP server: lets the agent manage projects, tables, SQL and migrations. Remote server at mcp.supabase.com.