GitHub links can be in PDFs in several ways.
Examples
github_links(psychsci)
#> # A tibble: 9 × 3
#> href text_id paper_id
#> <chr> <int> <chr>
#> 1 https://github.com/addrummond/ibex 41 0956797…
#> 2 https://github.com/jmobrien/SpecCurve 227 0956797…
#> 3 https://github.com/silveycat/vocab-syntax 156 0956797…
#> 4 https://github.com/silveycat/vocab-syntax 292 0956797…
#> 5 https://github.com/Spaak/context-congruency 265 0956797…
#> 6 https://github.com/robloughnan/ABCD_Intelligence_Polygenic_S… 40 0956797…
#> 7 https://github.com/giacomobignardi/empirical-aesthetics-VCA/… 384 0956797…
#> 8 https://github.com/kobor-lab/Public-Scripts 45 0956797…
#> 9 https://github.com/kobor-lab/Public-Scripts/blob/master/PedB… 82 0956797…
