"""CKA lessons: guided labs, one per curriculum objective, on a cluster of your own and without a
clock. A lesson explains, then walks you through steps that you do on its host; each step has a
check, a hint and the commands that do it. It ends by sending you to the objective's timed drill.
Lessons write nothing to the history or the scores - only a "lesson done" mark on the objective.

./ksim lesson                 the lessons of this track, and which you have done
./ksim lesson 1.1             start the lesson of objective 1.1 (id or key)
./ksim lesson STOR            a domain's lessons not done yet, back to back; ./ksim lesson next moves on
./ksim lesson check           check the step you are on; the next one follows
./ksim lesson audit [OBJ..]   prove lessons: every step fails before its commands and passes after

A lesson's host is named after its id - lesson 9101 runs on `cka9101` - which never clashes with a
task's. Its files go under {WS}/lesson-<objective>/. A step's `show` is how you would do it in the
exam: cmd() for what you type as it stands, hand() for what you do by hand - `vim` a generated
skeleton or a manifest pasted from the docs, `kubectl edit`, `ssh NODE` and `sudo -i`, a value you
read and `echo` - each with a script that does the same unattended. The audit runs the commands
as `candidate` on the host and, for each hand() part, its script; `./ksim lesson lint` keeps
scripts (sed, awk, yq, heredocs, loops, JSON patches) out of what you type. In a script, a command
on another node is `ssh NODE sudo bash <<'EOF' ... EOF` or `ssh -n NODE 'COMMAND'`: without -n,
ssh would read the rest of the script as its input.

One file per domain, as with the task banks. Besides the curriculum's competencies, the lessons
cover what a full CKA course teaches under each of them (2026-10-19: the topics of KubeDojo's CKA
course, written here from scratch): projected volumes, eviction thresholds, debug containers,
kube-proxy's rules, encryption at rest, in-place resize, PodDisruptionBudgets, QoS classes,
ServiceAccount tokens, a real kubeadm upgrade, EndpointSlices.
"""
from cka import lessons_arch, lessons_net, lessons_storage, lessons_tshoot, lessons_work

LESSONS = (lessons_storage.LESSONS + lessons_tshoot.LESSONS + lessons_work.LESSONS
           + lessons_arch.LESSONS + lessons_net.LESSONS)