Read an Upstream Jekyll Commit

Open-source software is not a frozen textbook.

The Jekyll repository itself changes through commits.

You are going to read one.

Use the pinned upstream context

This course's primary Jekyll source is pinned at:

74d751339d3e534aa51d5d7b0640e9bd743509e4

That commit changed Jekyll's clean-command behavior to account for the keep_files option.

You do not need to understand the entire Ruby patch.

Read the engineering story.

Inspect commit evidence

Using GitHub or a cloned upstream repository, identify:

commit title
files changed
problem being fixed
behavior before
behavior after
whether tests/docs changed

Read unfamiliar code strategically

When the implementation language is unfamiliar:

1. start with commit message/issue context;
2. identify named component/function;
3. read tests for expected behavior;
4. inspect the smallest relevant code diff;
5. state what you know versus what you infer.

Why this belongs in a student Jekyll course

Your build depends on upstream software.

Reading a change log or commit helps you understand:

• why versions matter;
• why a command may change;
• what maintainers consider a regression;
• how tests document behavior.

Portfolio action

Write a short upstream-change note:

Commit:
Problem:
Changed responsibility:
Evidence from diff/tests:
Could this affect my portfolio workflow? why/why not?

Checkpoint

Do not summarize the commit as "they fixed a bug." Name the behavior boundary that changed.