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The Whetstone catalog

Learn it properly. Once.

Crash courses and deep dives built for understanding — not for the algorithm. Read, build, and actually remember it.

⌘K
11 courses
CA
anthropicIntermediate

Claude Agents and Tools

The two CCDV-F domains that are really one question: what runs the loop, and what can it reach?

10 lessons210 min
CA
claudeIntermediate

Claude API Foundations

The two heaviest CCDV-F domains, which between them are half the exam, taught around the numbers that actually get asked.

15 lessons304 min
PC
promptingIntermediate

Prompt, Context and Safety on Claude

The 25% of CCDV-F that lives in the prompt, the window, the 400s and the guardrails.

10 lessons214 min
DD
dddIntermediate

Domain-driven design, the Fusion way

Learn DDD from zero, then write C# the team accepts on the first review.

26 lessons317 min
CA
csharpBeginner

C# and .NET, from the ground up

Cross from TypeScript to C# and write backend code that clears review the first time.

27 lessons342 min
LG
langchainIntermediate

LangGraph Ground School

LangChain, LangGraph, and LangSmith, learned by shipping real improvements to the systems you already love.

18 lessons900 min
BA
langchainIntermediate

Building Agents

The agent harness layer the LCAE Build domain actually tests, sitting on top of the graph runtime you already know.

13 lessons277 min
DA
langgraphIntermediate

Deploying Agents

The LCAE deploy domain, from vocabulary to durability, taught as architecture instead of API trivia.

12 lessons240 min
MA
langsmithIntermediate

Monitoring Agents in Production

Traces, threads, cost, Insights, and alerts. The LCAE domain that lives in the LangSmith UI, not in your editor.

13 lessons240 min
TA
langsmithIntermediate

Testing and Evaluating Agents

The LCAE test domain end to end: evaluators, datasets, experiments, and teaching an LLM judge to agree with a human.

12 lessons240 min
ZF
terminalBeginner

Zellij, from the ground up

Drive your terminal by muscle memory, not menus.

20 lessons204 min