Course 3.7 · Curriculum 2026.1
Cost control as architecture
Cost is a design decision, not a billing surprise. One cache rule keeps a 250-record book to a handful of model calls a day.
- Estimated effort
- 3 hr
- Lessons
- 26
- Modules
- 5
- Material
- 3 hr
Estimated effort is the sum of the lesson and lab times in the course outline, for this version of the course.
This course is planned and not on sale. The curriculum below is the plan, and it may change before the course opens.
See the courses on sale01What you will learn
6 capabilities, stated as things you can do
Each one is what you should be able to do at the end, not what the course covers. If an outcome is not testable, it is not an outcome.
- Model the cost of a feature before building it, in calls per day rather than in dollars per token.
- Design a cache key from the input hash, so a changed input invalidates cleanly.
- Apply the rule that an error is never cached as fresh.
- Expire active records on a time signal and cache finished records forever.
- Explain why time itself is a signal for an active record and not for a closed one.
- Set a budget alert on day one, before the first production call.
02Curriculum
5 modules, 26 lessons
Every lesson shows its length and its type, from the course outline.
5 modules · 26 lessons · 3 hr of material
Not a billing surprise. Modelled in calls per day, before a line of code exists.
- VideoCounting calls, not tokensPreview6 min
- VideoReal numbers from a running systemA full refresh across 250 records costs a dollar or two. Stating it that way is what gets a budget approved.6 min
- VideoWhere cost scales linearly and where it does not6 min
- VideoModelling a feature’s cost before you build it6 min
- ReadingThe dollar-or-two rebuild, and the ten-to-twenty-minute full pass5 min
An error is never fresh, and the input hash must match. Two clauses that keep a cache honest.
- VideoAn error is never fresh6 min
- VideoThe input hash must match6 min
- VideoWhat changes the hash, and what a client thinks changes it and does not6 min
- VideoA cache keyed wrong is worse than no cache at all6 min
- ReadingReading a cache table like a ledger5 min
Active records expire because time is a signal. Finished records never do, because nothing about them changes with the calendar.
- VideoActive records expire after seven days, because time is a signalAn open opportunity changes meaning as it ages, even with no field edits.6 min
- VideoFinished records are cached forever6 min
- VideoWhy a closed record never needs recomputing6 min
- VideoThe four clauses, and the order they are checked in6 min
- ReadingWhat happens the day someone reopens a closed record5 min
From four sentences to a working cache, and a way to prove the bill is small because the cache is doing its job.
- LabLab: implement the four-clause cache15 min
- VideoTesting a cache without waiting seven days for it to expire6 min
- VideoThe bug where everything looked cached and nothing was6 min
- ReadingA cache table’s schema, field by field5 min
- LabLab: prove the cache is the reason the bill is small22 min
A budget alert on day one, and the two metrics that predict a cost incident before it lands.
- VideoBudget alerts, and the day-one setup6 min
- ReadingCache hit rate and calls per record as leading indicators6 min
- VideoWhat a cost incident looks like before it is a cost incident6 min
- VideoSetting the alert threshold, and who it pages6 min
- ReadingA one-page cost model to hand to whoever approves the budget5 min
- QuizCheck: cost control10 min
04Before you start
What you need first
Assumed knowledge and setup
- Course 3.4.
- A Developer Edition org. The cache is built in Apex with platform cache or a custom object.
- Useful for the person approving the budget as well as the person spending it.
Before this course
05Who teaches it
Turni Saha
AI Adoption Lead, PMP
ShareCo Academy, and AI adoption for teams that are not technical.
Project Management Professional, issued 2024
06Reviews
No learner reviews yet
This course has not been taken by enough people to publish an honest rating, and we will not print invented quotes on a page that sells verification discipline. Here is what we can evidence instead.
- Assessment
- Lesson checks onlyThis course carries lesson checks and issues no certificate.
- Curriculum version
- 2026.1You enrol into a version. Content changes do not move you mid-course, and your required-lesson count is snapshotted at enrollment.
- Refunds
- 14 daysAn individual purchase can be refunded within 14 days if you have completed less than 20% of the lessons. Team seats are refundable before they are assigned. From the Academy terms.
Start 3.7
This course is in development and not yet open for enrolment. The courses open now are listed in the catalogue.
- 3 hr estimated effort, labs included
- A ShareCo certificate is not a Salesforce certification