add: aip, a story resource

AGENT.md

@@ -1,5 +1,14 @@
 # Development guide
 
+IMPORTANT: Read @README.md, @aip.md.
+
+## Best practices
+
+Do not read generated files, except for debugging purposes.
+
+After making a change, check the project for diagostnics, and if applicable, run
+related build and test commands.
+
 ## Backend/Golang
 
 Do not alter go.mod directly, instead, use the CLI tools `go mod tidy`, `go mod
@@ -21,7 +30,8 @@ Prefer to test with real implementations rather than mocks. For example, bring
 up a real HTTP server to test.
 
 Generally conform to resource-oriented design describe in
-https://google.aip.dev/general.
+https://google.aip.dev/general. Read aip.md for a summary. All proto service
+methods should be annotated with google.api.http hints and path variables.
 
 ## Frontend/Typescript