Three reproducible capstone projects
Complete local reference implementations, executable checks and honest limits. Node.js 18+; zero dependencies; deterministic inputs.
English project edition. Chinese is also available.
Causal attention & KV-cache correctness →
Implement stable softmax, causal attention and incremental caching; establish numerical invariants.
Evidence retrieval with a measured baseline →
Separate retrieval accuracy, answerable recall and correct abstention.
Delayed feedback and bounded control →
Simulate a point mass, inject one change at a time and measure tracking versus effort.