If you want to make a suggestion for linpeas or winpeas please use github issues
Check out the TODO page
From the PEASS-ng release winpeas and linpeas are auto-built and will search for files containing sensitive information specified in the sesitive_files.yaml file.
If you want to contribute adding the search of new files that can contain sensitive information, please, just update sesitive_files.yaml and create a PR to master (linpeas and winpeas will be auto-built in this PR). You can find examples of how to contribute to this file inside the file. Also, in the comments of this PR, put links to pages where and example of the file containing sensitive information can be foud.
From the PEASS-ng release linpeas is auto-build from linpeas/builder. Therefore, if you want to contribute adding any new check for linpeas/macpeas, please add it in this directory and create a PR to master. Note that some code is auto-generated in the python but most of it it's just written in different files that will be merged into linpeas.sh. The new linpeas.sh script will be auto-generated in the PR.
Just modify winpeas and create a PR to master. The new winpeas binaries will be auto-generated in the PR.