/extract-tikz

name: extract-tikz
description: Extract TikZ diagrams from Beamer source, compile to PDF, convert to SVG with 0-based indexing. Use when updating TikZ diagrams for Quarto slides.
argument-hint: "[LectureN, e.g., Lecture2]"
allowed-tools: ["Read", "Bash", "Glob"]

Extract TikZ Diagrams to SVG

Extract TikZ diagrams from the Beamer source, compile to multi-page PDF, and convert each page to SVG for use in Quarto slides.

Steps

Step 0: Freshness Check (MANDATORY)

**Before compiling, verify that `extract_tikz.tex` matches the current Beamer source.**

1. Find the Beamer source: `ls Slides/$ARGUMENTS*.tex` 2. Extract all `\begin{tikzpicture}` blocks from Beamer 3. Compare with `Figures/$ARGUMENTS/extract_tikz.tex` 4. If ANY difference exists: update extract_tikz.tex from the Beamer source 5. If extract_tikz.tex doesn't exist: create it from scratch

Step 1: Navigate to the lecture's Figures directory

cd Figures/$ARGUMENTS

Step 2: Compile the extract_tikz.tex file

TEXINPUTS=../../Preambles:$TEXINPUTS xelatex -interaction=nonstopmode extract_tikz.tex

Step 3: Count the number of pages

pdfinfo extract_tikz.pdf | grep "Pages:"

Step 4: Convert each page to SVG using 0-BASED INDEXING

**CRITICAL: PDF pages are 1-indexed, but output SVG files are 0-indexed!**

PAGES=$(pdfinfo extract_tikz.pdf | grep "Pages:" | awk '{print $2}')
for i in $(seq 1 $PAGES); do
  idx=$(printf "%02d" $((i-1)))
  pdf2svg extract_tikz.pdf tikz_exact_$idx.svg $i
done

Step 5: Sync to docs/ for deployment

cd ../..
./scripts/sync_to_docs.sh $ARGUMENTS

Step 6: Verify SVG files

• Read 2-3 SVG files to confirm they contain valid SVG markup
• Confirm file sizes are reasonable (not 0 bytes)

Step 7: Report results

Source of Truth Reminder

TikZ diagrams MUST be edited in the Beamer `.tex` file first, then copied verbatim to `extract_tikz.tex`. See `.claude/rules/single-source-of-truth.md`.