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Posts External Link Status — Phase 4 Baseline (auto-generated)

This document records known broken or flaky external links in pages/_posts/ after the Phase 4 link-repair pass. Internal links: 282/282 OK when validated against the built _site/ (run lychee --offline --base "$PWD/_site").

External link rot is an ongoing maintenance burden — these entries are acknowledged and tracked, not necessarily considered actionable in the cleanup PR.

Validation command

lychee --no-progress --format json --base "$PWD/_site" \
  --max-concurrency 10 --timeout 15 --max-retries 1 \
  --accept '200..=299,403' \
  pages/_posts/**/*.md

Known broken / flaky external links (post-Phase 4)

File URL Status Notes
devops/2025-11-17-deploying-jekyll-sites-to-azure-cloud.md https://jekyllrb.com/docs/deployment/methods/ ✅ FIXED Replaced with /docs/deployment/ (Jekyll site reorganized)
devops/2025-11-17-deploying-jekyll-sites-to-azure-cloud.md https://azure.microsoft.com/products/devops/ Timeout Intermittent — Microsoft host slow under bot UA
devops/2025-11-17-deploying-jekyll-sites-to-azure-cloud.md https://azure.microsoft.com/products/devops/pipelines/ Timeout Same as above
devops/2026-03-07-foundational-ci-cd-pipelines-github-vscode-extensions.md https://dev.azure.com/ Timeout Intermittent
learning/2021-11-08-it-purpose-manifesto.md https://www.gnu.org/gnu/manifesto.en.html 429 Rate-limited; URL is valid in browsers
system-administration/2025-10-13-el-capitan-bootable-installer-apple-silicon.md https://archive.org/details/macosinstallers 404 Item removed from archive.org
web-development/2025-11-15-github-pages-hidden-gem.md https://www.youtube.com/watch?v=2MsN8gpT6jY 404 Video removed by uploader
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.ezfolk.com/library/ 404 Site offline
creative-experimental/2025-07-03-music-resources-free-sheet-music.md https://libraries.indiana.edu/cook 404 URL restructured
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.gutenberg.org/wiki/Gutenberg:The_Sheet_Music_Project 404 Project page removed
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.sheetmusicarchive.net/index.cfm 404 Site offline
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://memory.loc.gov/ammem/smhtml/smhome.html Timeout Library of Congress URL deprecated
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.ccel.org/cceh/ 404 URL changed
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.bpl.org/research/music/aboutmusic.htm 404 Site reorganized
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.leeds.ac.uk/music/Info/RRTuneBk/ 404 Site reorganized
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.cpdl.org/wiki/index.php/Main_Page 500 Server error; valid wiki at cpdl.org
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://memory.loc.gov/ammem/collections/sheetmusic/brown/ Timeout LOC URL deprecated
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.pdinfo.com/Public-Domain-Music-List.php 404 Page removed
creative-experimental/2025-07-03-music-resources-free-sheet-music.md http://www.sims.berkeley.edu/~mkduggan/neh.html Network error Berkeley faculty page removed

Recommended follow-ups (post-merge, not blocking)

  1. creative-experimental/2025-07-03-music-resources-free-sheet-music.md: 12 of 19 broken links live in this single “list of resources” post that is heavily decayed. Recommended action: prepend an editor’s note linking to a Wayback Machine snapshot, OR mark the post as archived/historical, OR replace each URL with its https://web.archive.org/web/*/<url> mirror.

  2. Azure timeouts: Consider switching to canonical short URLs (https://azure.microsoft.com/en-us/products/devops/) which sometimes respond faster under automated probes.

  3. Other dead links: One-by-one review against current vendor docs (jekyllrb.com URLs change with releases; YouTube videos disappear).

Reports