[clinic · EX-01] Attribute ten failures

[akash-coded]

Exercise clinic. One long-running thread per exercise. Ask here rather than opening a
new thread — the answers accumulate where the next person will look for them.

Exercise: EX-01 — Attribute ten failures · difficulty 🟢

What this exercise asks

Read the exercise first; this thread is for when you are stuck, not instead of it.

Three ways people get stuck on this one

1. Bucketing by symptom ("answer was vague") instead of by stage. Vague answers come from all four verdicts and the bucket tells you nothing.

2. Attributing from the answer alone. Without checking whether gold reached the pool, and then the packed context, you cannot separate a retrieval miss from a packing loss.

3. Stopping at ten when nine of them are the same failure. Ten distinct attributions is the point; if the first ten are one bug, fix it and draw ten more.

How to ask here

Post the numbers you got, the config that produced them, and what you already tried.
A question with a measurement in it gets answered in one round trip; a question without one
takes three.

If you have finished it, post the write-up in Show and Tell with the
[solution · EX-01] prefix rather than here — this thread stays for people who are stuck.