doc: tweak external links

website/contributing/how-to.md

@@ -50,6 +50,8 @@ We encourage you to share your knowledge and experience with ast-grep with other
 
 - **Write introductions to ast-grep**: You can write blog posts, articles, or tutorials that introduce ast-grep to new users. You can explain what ast-grep is, how it works, what problems it solves, and how to install and use it. You can also share some examples of how you use ast-grep in your own projects or workflows.
 
+- **Answer questions about ast-grep**: Help answering people's questions on [StackOverflow](https://stackoverflow.com/questions/tagged/ast-grep) or [Discord](https://discord.gg/4YZjf6htSQ). Your answers will be appreciated!
+
 - **Write ast-grep's tutorial**: You can write more advanced tutorials that show how to use ast-grep for specific tasks or scenarios. You can demonstrate how to use ast-grep's features and options, how to write complex queries and transformations, how to integrate ast-grep with other tools or platforms, and how to optimize ast-grep's performance and efficiency.
 
 - **Translate documentation**: You can help us make ast-grep more accessible to users from different regions and languages by translating its documentation into other languages. Reach out [@Shenqingchuan](https://twitter.com/Shenqingchuan), translation team member of [Rollup](https://github.com/rollup/rollup-docs-cn), [Vite](https://github.com/vitejs/docs-cn) and ast-grep, for more ideas about translation!

website/guide/introduction.md

@@ -96,10 +96,10 @@ You can start from creating a one-liner to rewrite code at command line with min
 ### Pragmatism
 ast-grep comes with batteries included. Interactive code modification is available. Linter and language server work out of box when you install the command line tool. ast-grep is also shipped with test framework for rule authors.
 
-## Check out Discord Bot
+## Check out Discord and StackOverflow
 
 <!-- TODO: move this to FAQ-->
 
-Still got questions? Join our [Discord](https://discord.gg/4YZjf6htSQ) and ask @ast-grep-bot anything!
+Still got questions? Join our [Discord](https://discord.gg/4YZjf6htSQ) and discuss with other users!
 
-@ast-grep-bot is fluent in many natural languages. It can help you to quickly find the relevant information for your task and even write a pattern or YAML rule for you!
+You can also ask questions under the [ast-grep](https://stackoverflow.com/questions/tagged/ast-grep) tag on [StackOverflow](https://stackoverflow.com/questions/ask).

website/reference/yaml/rewriter.md

@@ -17,7 +17,7 @@ A rewriter rule is similar to ordinary ast-grep rule, except that:
 Rewriters are an advanced feature and should be used with caution, and it is experimental at the moment. If possible, you can use ast-grep's [API](/guide/api-usage.html) as an alternative.
 :::
 
-Please ask questions in [GitHub Discussions](https://github.com/ast-grep/ast-grep/discussions) or [discord](https://discord.com/invite/4YZjf6htSQ) for help.
+Please ask questions on [StackOverflow](https://stackoverflow.com/questions/tagged/ast-grep), [GitHub Discussions](https://github.com/ast-grep/ast-grep/discussions) or [discord](https://discord.com/invite/4YZjf6htSQ) for help.
 
 ## `id`
 * type: `String`
@@ -157,4 +157,4 @@ transform:
 fix: $IMPORTS
 ```
 
-See the [playground link](/playground.html#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) for the complete example.
+See the [playground link](/playground.html#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) for the complete example.