diff --git a/CLAUDE.md b/CLAUDE.md
index 2ea1473..27ee196 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -62,14 +62,22 @@
   written from.
 - **macOS**: none of the above applies; the repo should behave like a
   normal local git checkout.
-- **LaTeX toolchain**: as of this writing, no LaTeX toolchain (`pdflatex`,
-  `latexmk`, `bibtex`) was found on the Windows PATH or inside WSL on the
-  machine this file was written from — `template.tex` couldn't be compiled
-  to verify output. Check for one (`which pdflatex`) before relying on
-  Claude Code to compile/check the PDF; if missing, install TeX Live
-  (`sudo apt install texlive-full` on WSL/Linux, `brew install --cask
-  mactex` or the smaller `basictex` on macOS) or compile via Overleaf
-  instead.
+- **LaTeX toolchain**: on this WSL machine, TeX Live 2026 is installed at
+  `/usr/local/texlive/2026/bin/x86_64-linux/` (a full install — pdflatex,
+  latexmk, bibtex, etc.), with `PATH` set in `~/.zshrc` (the default shell
+  is zsh). That `PATH` export is only loaded for an *interactive* shell —
+  a plain `bash -lc "..."`/`zsh -lc "..."` from Windows (e.g. via
+  `wsl.exe --`) won't have it on `PATH` and `which pdflatex` will
+  (misleadingly) fail. To compile from outside WSL, use an interactive
+  shell explicitly, e.g. from PowerShell:
+  `wsl.exe -- zsh -ic "cd /home/nlab/MDPI && pdflatex -interaction=nonstopmode template.tex"`.
+  Verified working: compiling `template.tex` this way produces a 6-page
+  `template.pdf` (only harmless "undefined reference"/rerun warnings on
+  the first pass — normal for LaTeX before a second pass resolves
+  cross-references). On a machine without this TeX Live install (e.g. a
+  fresh macOS checkout), install one (`brew install --cask mactex` or the
+  smaller `basictex`, or `sudo apt install texlive-full` on Linux) or
+  compile via Overleaf instead.
 
 ## Writing conventions
 - Manuscript language is English (MDPI submission requirement), even