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Document the R 4.6 CRAN pin failure and workflow 02's blind spot Adds the R_NamespaceRegistry symptom, a one-pass bump for stale CRAN records, and a warning that 02 installs binaries so it cannot detect a lockfile the container fails to compile.
Warn that force-renv-init leaks an .Rprofile into the update PR renv::init writes it unconditionally and create-pull-request commits every changed file. No Carpentries lesson tracks one.
Document the Bioconductor and R version mismatch that breaks CI Adds the Bioc-to-R pairing table, the PREXPR symptom, the force-renv-init recovery, and the renv cache miss sequence for workflows 02 and 03.
Clarify that renv is activated in subprocesses, not your session
Note that manage_deps snapshots only installed packages
Add renv and dependencies page, switch setup to pak Documents the split between the global build toolchain and the sandpaper-managed lesson-requirements renv profile, which is the source of the recurring 'sandpaper disappeared' problem, plus running Python in an Rmd lesson via reticulate. Replaces devtools with pak in the setup instructions and fixes the stale MelBioInf_docs repository links on the home page.