One payment. Every course. Forever.
Not per course, not per month. 6 courses live today — 80 lessons and 22 project labs — and everything that ships after you buy.
What a paid tier unlocks, course by course
Free reads every lesson in each course. Core adds the doing layer — saved progress, recorded quizzes, projects and everything below.
Harness Engineering
Make AI coding agents actually reliable.
- Free: read all 23 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 8 modules
- Pro: 3 rubric labs
Agent Systems
Build an agent that remembers, acts for you, and can be trusted.
- Free: read all 8 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 3 modules
- Pro: 2 rubric labs
AI Solutions Architect
Design, cost, secure and prove AI systems a client can sign off on.
- Free: read all 15 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 4 modules
- Pro: 4 checker labs
Agent Fleets
Run many coding agents without drowning in their output.
- Free: read all 16 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 5 modules
- Pro: 2 rubric labs and 5 checker labs
Graph Engineering
Four shapes cover almost every agent graph you'll build.
- Free: read all 10 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 6 modules
- Pro: 6 checker labs
Loop Engineering
Keep the loop's own measuring stick honest while it runs unattended.
- Free: read all 8 lessons; progress saves on lesson 1
- Core: saved progress + verified completion across all 6 modules
- Pro: 1 rubric lab
| Feature | Free $0 | Core $39 | Most popularPro $74 | Team $174 |
|---|---|---|---|---|
| Everything you can read | ||||
| Read every lesson in every course | ||||
| Full curriculum, publicly browsable | ||||
| Every future course, at no extra cost | ||||
| Concise + detailed path per lecture | ||||
| Full-text search across all content | ||||
| How you learn | ||||
| Progress tracking + resume | 1st lesson | |||
| Graded quizzes inside lessons | ||||
| Recorded answers + verified completion | 1st lesson | |||
| Spaced review queue | 1st lesson | |||
| Project briefs, saved progress | ||||
| Labs on every available course (rubric prompts or the deliverable checker, run on your machine) | ||||
| Banked grading credits (for server-side grading, in development) | 20 | 100 | ||
| What you keep | ||||
| Template pack (zip) | ||||
| Verifiable certificate, one per available course | ||||
| For teams | ||||
| Seats | 1 | 1 | 1 | in development |
| Team progress dashboard | in development | |||
| Invoice billing | in development | |||
| Start free | Get Core | Get Pro | Get Team | |
Pro — the whole platform, graded
Everything in Core, plus labs on every available course — rubric prompts and a checker you run in your own AI agent, on your own repositories — and a verifiable certificate for each course you finish.
$74one-time
6 courses · 80 lessons · 22 project labs · lifetime updates
If someone else is paying
Multi-seat billing (Team) is in development. If you need to justify a single Pro seat first, this is the short version to forward — every claim in it is checkable on this site.
For forwarding
This is a one-time purchase, not a subscription, and it covers every course on the platform including future ones. The material is about the engineering system around AI coding agents — repository conventions, verification gates, scope control, session state — not about one vendor's tool, so it does not expire when we change tools. The full curriculum is public before purchase, and there is a 30-day money-back guarantee. Output is a working harness in our own repositories, not a certificate of attendance.
Questions about paying
Is this really one payment?
Yes. There is no subscription and no renewal. Every lecture added later, and every course added later, is included in what you already bought.
What if I buy Core and want Pro later?
Buy Pro whenever you want — a tier grant only ever moves up, never down, and all of your progress, completions and review queue carry over untouched.
How does the refund work?
Email within 30 days and it is refunded. No form, no reason required, no attempt to talk you out of it.
Can my employer pay for this?
Multi-seat billing (Team) is in development. For now, buy Pro individually — it produces a normal receipt suitable for expensing — see the justification note below if you need to send something to a manager.
Do I need to keep paying to keep access?
No. Access does not expire, including if you never log in for a year and come back to a course that has doubled in size.
Read a lesson before you pay for one.
Every lesson is free to read, no card required.