Author and edit chapters of the SWIG Users Manual under Doc/Manual: chapter conventions, manual heading anchors, the four content `<div>` styles (code / targetlang / shell / diagram), the auto generated section TOC, the `make` targets that renumber headings and validate HTML, and the rules for cross document anchored links.
Debug the SWIG compiler itself: -debug-* command line flags, parse tree dumps (text and XML), gdb with the swigprint/locswigprint helpers from Tools/swig.gdb, valgrind via the SWIGTOOL/RUNTOOL test suite hooks, and DOH_DEBUG_MEMORY_POOLS for memory corruption diagnosis.
Run SWIG test suite for specific languages. Use when testing SWIG changes, verifying language support, debugging test failures, or running regression tests.