Custom Engine

by alibaba

Custom Engine is an AI Engineering skill for Claude Code, published by alibaba in skill-up.

680 stars45 forkson alibaba/skill-upAdded 2026/08/24+13% in starsRepository updated 2026/08/21

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Install in seconds

Install Custom Engine

Copy Custom Engine into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/alibaba/skill-up/tree/main/e2e/testdata/custom-engine ~/.claude/skills/custom-engine

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/alibaba/skill-up.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: e2e/testdata/custom-engine/SKILL.md in alibaba/skill-up
Installs to: ~/.claude/skills/custom-engine
Collection: One of 23 skills cataloged from this repository
Category: AI Engineering — 3670 skills

What Custom Engine does

Custom Engine is a minimal end-to-end fixture for testing local and HTTP custom agent transports. Use it to verify SessionInput and SessionResult flow through the pipeline.

Custom Engine is cataloged under AI Engineering on DirSkills. Custom Engine comes from a repository tagged agent-skills, ai, ai-agents, alibaba and skills.

Documentation

README

Excerpt

Custom Engine e2e fixture

This directory is a minimal skill-up fixture that exercises the Custom Engine local and http transports end-to-end. It is consumed by e2e/custom_engine_test.go.

agent.sh + evals/eval.yaml cover the local transport: agent.sh is a deterministic stand-in for a real custom agent that reads the SessionInput JSON the framework writes to ${input_file} and emits a fixed SessionResult on stdout. The case asserts that final_message flows from the agent's stdout into the report.

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Custom Engine

What else does alibaba publish alongside Custom Engine?
Custom Engine is one of 23 skills that DirSkills catalogs from alibaba/skill-up, the repository it ships in. Its siblings there include Agent Judge, Agent Judge Support and Code Quality Analyzer. Each one is a separate skill with its own page in this directory, installs the same way Custom Engine does, and is maintained by alibaba in that same repository. The rest of the collection is listed on the alibaba/skill-up page.
How does Custom Engine compare to other AI Engineering skills?
Custom Engine ranks #1786 by stars among the 3670 AI Engineering skills in this catalog. The most-starred ones next to it are Architecture Decision Records, AI-First Engineering and Agentic OS. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Custom Engine against them. Open each page to compare what they document and how they install.