Set of customization hooks for different topics

[mahermanns]

The Introduction to HPC provides basic knowledge on how to navigate HPC systems.

At different times in the episodes it would be helpful to add local information to enable a "that is how it is in general --- this is how it is on the local platform" material.

This PR adds empty snippets to the default customization (HPCC_MagicCastle_Slurm) and integrates them into the episodes.

[github-actions]

Thank you!

Thank you for your pull request 😃

🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

• 🎯 correct output
• 🖼️ correct figures
• ❓ new warnings
• ‼️ new errors

Rendered Changes

🔍 Inspect the changes: https://github.com/carpentries-incubator/hpc-intro/compare/md-outputs..md-outputs-PR-480

The following changes were observed in the rendered markdown documents:

 10-hpc-intro.md                                    |   3 +
 11-connecting.md                                   |   5 +
 12-cluster.md                                      |   2 +
 15-modules.md                                      |   2 +
 config.yaml (gone)                                 | 117 ---------------------
 .../snippets/cluster/architecture-info.Rmd (new)   |   0
 .../cluster/authorized-keys-info.Rmd (new)         |   0
 .../cluster/secure-connections-info.Rmd (new)      |   0
 .../snippets/cluster/transfer-nodes-info.Rmd (new) |   0
 .../snippets/modules/default-modules.Rmd (new)     |   0
 .../scheduler/basic-job-status-output.Rmd (new)    |   4 +
 md5sum.txt                                         |  38 +++----
 12 files changed, 35 insertions(+), 136 deletions(-)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

This output provides a way for you to inspect the output in a diff-friendly manner so that it's easy to see the changes that occur due to new software versions or randomisation.

⏱️ Updated at 2026-02-05 09:30:40 +0000

[ocaisa]

Let's take advantage of the fact that this is R and insert comments here to explain the existence/purpose of this (and indeed all snippets!). It could also be somehow signified in the name of the Rmd that is intended for customization/localization purposes (like with a _localization in the filename, or a special subdirectory within snippets).

[ocaisa]

I understand the need for this but I am not a big fan of placing them in specific locations within the lesson. We will end up with similar items peppered everywhere. I would be more inclined to support placeholders at the beginning and end of each episode so that people have more freedom to tweak the scope.

[ocaisa]

I did suggest a while ago that each lesson should have preamble and postamble snippets, but there was pushback on this as it could lead to local customisations taking priority over upstream contributions.