Warm-up: Name That Error — a traceback from a file you have
never opened
Read before you change: run it, find the entry point, name the
nouns, follow one path, then change one small thing on purpose
Launch: The Maintenance Sprint — extend and fix a program your
team did not write, without breaking what already worked
Sprint work period: run it, follow one path, then write the
characterisation tests that capture what it already does — all of
that before a single line is changed. Every commit gets a message a
stranger could act on a year from now.
Things to do before our next class
Milestone: the inherited program runs on your machine, and you
can say in one sentence what it does.
Project milestone: open your team’s first feature branch.