What you’ll learn to do
Compare skill versions fairly, detect regressions, and decide whether an improvement is supported by evidence.
SKILLS · ADVANCED · 9 PRACTICAL STAGES
Agent Skills: Advanced
A skill package and an evidence-based release decision comparing no skill, the initial skill and an improved version.
Your starting pointExperience writing a basic skill. Advanced means skill-authoring experience, not a requirement to code.
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1 / 6Illustrated preview
YOUR PROJECT AND YOUR LEARNING
Build it.
Learn to judge it.
Find out whether a revision is better
Illustrative example · You bring your own task.
- 01 / YOUR TASK
An existing reporting skill guesses owners when notes are incomplete.
- 02 / EXAMPLE RESULT
A comparison of no skill, the original skill and the revised skill on the same cases.
- 03 / YOUR CHECK
Check missing-owner cases and ordinary cases. Record regressions and cases where the revision did not help.
How you’ll check your learning
Compare the same cases without a skill, with the original, and with the revised version; test a new case before your release decision.
THE COURSE PROGRAM
9 practical stages.
One useful project.
On-demand references, cooperating skills, deterministic checks, regression cases, untrusted input and recovery. Improvements and token savings are tested, not promised.
Check what you need ↓Your skill and a fair starting point
- What you’ll do
- Bring a skill and define the cases and checks for comparing versions.
- What you’ll have
- A starting version and a consistent evaluation plan.
Make the activation boundary visible
- What you’ll do
- Try matching and unrelated requests; inspect whether the skill runs.
- What you’ll have
- Evidence of where the skill activates and where it does not.
Load supporting material when it is needed
- What you’ll do
- Move a detailed rule into a supporting guide and test when it is read.
- What you’ll have
- A smaller main instruction with a checked reference workflow.
Make two skills work together
- What you’ll do
- Give a second skill a specific review job and inspect the handoff.
- What you’ll have
- A tested draft-and-review workflow, with its limits recorded.
Separate exact checks from judgment
- What you’ll do
- Use exact checks for format, then review the facts yourself.
- What you’ll have
- A clear distinction between a format pass and a correct answer.
Improve one case without breaking another
- What you’ll do
- Improve a difficult case, then rerun cases that worked before.
- What you’ll have
- A comparison showing improvements and any new failures.
Keep source text from rewriting the task
- What you’ll do
- Add source text that tries to redirect the task and inspect the response.
- What you’ll have
- A tested boundary between source material and instructions.
Resume from a checkpoint you can verify
- What you’ll do
- Write a checkpoint from observed results and try continuing from it.
- What you’ll have
- A recovery note whose completed work can be verified.
Release your skill with evidence
- What you’ll do
- Compare versions on the same cases, test a fresh case and inspect the export.
- What you’ll have
- A skill package and an evidence-based decision about using it.
Before you try
- Free on this website: read every course program and get up to 10 guest replies from the course advisor. No sign-up required.
- In the app: sign in to try the introduction and first 2 learning phases free. No card required.
- Before continuing: subscribe to continue beyond the free phases. Check current plans in the app. External provider costs are separate.
Guest advice and the free learning phases are separate. Neither includes the full course or free external tools.
What happens when I select “Try for free”?
You’ll open Agent Skills: Advanced in the app. Sign in or create an account if asked. Try the introduction and first 2 learning phases free. No card required. Subscribe to continue.
What will I practice beyond prompting?
On-demand references, cooperating skills, deterministic checks, regression cases, untrusted input and recovery. Improvements and token savings are tested, not promised.
Will my advisor conversation move with me?
Your guest conversation stays on this website. It is not transferred to your app account. Bring your task and any useful notes when you start.
YOUR NEXT STEP
Ready to put
this skill to work?
Try for free Sign in to try the introduction and first 2 learning phases free. No card required. Subscribe to continue.