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Create your ChatKit Server skill in one prompt, then learn to improve it throughout the chapter
Passed 19 of 23 test cases with the skill, and 7 of 23 without it.
and 15 more in the full report
13 fixed7 passed either way4 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 12 test cases the skill fixed. Same model, same prompt, with and without the skill.
After extracting the downloaded skills lab archive on my machine, I need to start the CLI environment. Should I run npm start or claude-code CLI in the folder? Give me the exact command line invocation.
| Checked | Without skill | With skill |
|---|---|---|
| Instructs changing directory with cd claude-code-skills-lab. | Missed | Passed |
| Specifies launching the terminal environment using the claude command. | Passed | Passed |
The instructions your model reads when the skill loads.
You built REST APIs in Chapter 40. But agents are conversational, not request/response. Before learning ChatKit Server, you'll own a ChatKit skill.
cd claude-code-skills-lab
claude
Copy and paste this prompt:
Using your skill creator skill create a new skill for ChatKit Server. I will
use it to build conversational AI backends from hello world to professional
production systems. Use context7 skill to study official documentation and
then build it so no self assumed knowledge.
Claude will:
Your skill appears at .claude/skills/chatkit-server/.
test cases passed, vs 7 / 23 without
Published skills whose descriptions closely match this one, with their headline benchmark lift.
More skills from the same source and nearby in the registry, with their headline benchmark lift.