Tom takes a walk down commit lane
Ask Tom who added a feature and he now searches the upstream repository's merged PR titles and commit messages, then hands back links and handles. He will also tell you what the evidence cannot prove.
You post '@devnull-tom who added dark mode?' and wait. Back comes a short answer with a GitHub link, a date and a handle. It comes from the merged pull request whose title mentions dark mode, the commit message that does, or both. No more squinting at the changelog.
Credit goes to paulinevos, who gave Tom a history search to sit beside his other tools. Give him a feature phrase and he runs two lookups against nunomaduro/dev-null.sh. One finds merged pull requests that targeted production, and the other finds non-merge commits on the default branch. Each lookup returns at most five matches, with title, link, date and the GitHub account attached to the pull request or commit. Tom searches twice per reply, takes 1 to 100 characters, and caches each phrase for fifteen minutes. Quotes, URLs and GitHub search qualifiers get turned away.
One catch. On the commit side Tom keeps only the first line of the message, cut at 300 characters, and only the one GitHub account attached to the commit. If your feature landed as a co-authored commit, the trailer naming your co-author never reaches him, so he credits one person and misses the rest.