module 4 of 7 · 50 min

Attention

Let a model dynamically weight which context elements matter for each representation.

Explain Attention clearlyImplement a small Attention exampleEvaluate whether Attention improves a simpler baselineIdentify failure cases and operational constraints
learning statenot started
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mental model

start with the idea before the implementation.

Attention computes compatibility scores then uses them to mix information.
core concepts

the mechanisms you need to reason about.

01

Queries keys values

Queries keys values is studied through intuition implementation evidence and trade-offs. The goal is to be able to explain the mechanism and verify it with a concrete test rather than only repeat a definition.

02

Scaled dot-product attention

Scaled dot-product attention is studied through intuition implementation evidence and trade-offs. The goal is to be able to explain the mechanism and verify it with a concrete test rather than only repeat a definition.

03

Masks

Masks is studied through intuition implementation evidence and trade-offs. The goal is to be able to explain the mechanism and verify it with a concrete test rather than only repeat a definition.

04

Multi-head attention

Multi-head attention is studied through intuition implementation evidence and trade-offs. The goal is to be able to explain the mechanism and verify it with a concrete test rather than only repeat a definition.

engineering lab

turn the lesson into evidence.

LAB 1

implement tiny attention

Build the smallest version first. Record the input, expected output, measured result and one failure you discovered.

LAB 2

visualize weights

Build the smallest version first. Record the input, expected output, measured result and one failure you discovered.

LAB 3

test masking

Build the smallest version first. Record the input, expected output, measured result and one failure you discovered.

knowledge checks

prove you can explain and decide.

1

derive tensor shapes

ask cortex to test me →
2

explain causal masks

ask cortex to test me →
3

separate attention from recurrence

ask cortex to test me →
failure modes

what usually goes wrong.

risk

interpreting weights as explanations

Detect this early by defining a baseline, a measurable signal and a condition that would cause you to stop or redesign the approach.

risk

quadratic cost

Detect this early by defining a baseline, a measurable signal and a condition that would cause you to stop or redesign the approach.

risk

mask bugs

Detect this early by defining a baseline, a measurable signal and a condition that would cause you to stop or redesign the approach.

proof of learning

Create a short Attention engineering note with one working artifact one metric one failure case and one decision about when you would or would not use it.

Save the result in your portfolio or project repository. A strong learning artifact should make your assumptions, metrics and failure analysis visible.