Teacher since July 2025
Darius Feld
Prompt workflows for heavy users: chaining, standing instructions, long documents and reasoning models
9
tutors built
4.5Sample
average from 15 reviews
269Sample
lessons taught by their tutors
About Darius
I work with people who already use AI assistants every day and want more dependable results. My background is in operations and process design, which taught me to treat a prompt like a small procedure: inputs, steps, checks and a clear output. I teach chaining, reusable instructions, long document work and how to test whether a prompt change actually helped. I prefer small experiments to opinions, and I will tell you when a task is simply not a good fit for a language model. Expect exercises that use your own material rather than invented examples.
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Tutors by Darius
9 tutors
Prompting for Accuracy: Fewer Made Up Answers
Use grounding, honest uncertainty and quote checks to cut down on confident but false answers.68 lessonsSampleDarius Feld$6Prompting Across Models: Adapting When You SwitchPrompting Across Models: Adapting When You Switch
Keep your prompts working when you change assistants, models or when a model is updated.47 lessonsSampleDarius Feld$9Prompt Templates for Repeatable WorkPrompt Templates for Repeatable Work
Turn your best one-off prompts into templates you and your team can reuse with consistent results.42 lessonsSampleDarius Feld$6System Prompts and Custom InstructionsSystem Prompts and Custom Instructions
Write standing instructions that shape every reply, and test them so they hold up in real use.39 lessonsSampleDarius Feld$7Prompt Chaining: Multi Step Workflows by HandPrompt Chaining: Multi Step Workflows by Hand
Link small prompts so each output feeds the next, with checks between steps you can actually see.38 lessonsSampleDarius Feld$7Long Documents: Prompting Over Hundreds of PagesLong Documents: Prompting Over Hundreds of Pages
Get accurate answers from long reports, contracts and manuals without missing what sits in the middle.35 lessonsSampleDarius Feld$11Prompting Reasoning Models WellPrompting Reasoning Models Well
Know when a reasoning model is worth the wait and how to brief it for hard, multi step problems.Darius Feld$12Testing Prompt Changes With Small Test SetsTesting Prompt Changes With Small Test Sets
Stop guessing whether a prompt edit helped: compare versions on a small, fixed set of real inputs.Darius Feld$10Interview Me First: Prompts That Ask You QuestionsInterview Me First: Prompts That Ask You Questions
Let the assistant ask you the right questions before it writes, plans or advises.Darius FeldFreeRecent reviews
What students said about Darius's tutors.
- Viktor S.Sample
Sensible and not preachy. Grounding plus quotes is now how I use the assistant for policy questions at work.
- Amara O.Sample
Clear for a beginner like me. I check citations every time now, and I found two invented ones last week.
- Sana Q.Sample
Practical. Finding the first step where things went wrong is a debugging habit I use all the time now.
- Mateo L.Sample
Clear on handoff formats. I wanted more on automating chains, but the tutor was right that I needed it stable by hand first.
- Ravi P.Sample
Quote first prompting is now standard in our bid team. We caught two obligations a summary had skipped.
- Sebastian R.Sample
We caught a regression after an update because we had kept the test set from this course. Saved a messy week.