Add base/cvd/.agents/AGENTS.md

This applies some short guidelines to make AI development produce better
output by running the tools that can catch their mistakes.

Bug: b/524730723

Author: Databean

base/cvd/.agents/AGENTS.md

@@ -0,0 +1,12 @@
+# Workspace Guidelines
+
+This is a bazel workspace.
+
+## Git Workflow
+- Please add an "Assisted-by:" tag to git commits with the format: `Assisted-by: AGENTNAME:MODELVERSION`
+- Please format BUILD files in every commit by running: `buildozer '//cuttlefish/...:__pkg__' format`
+- Every commit should be validated. Please validate changes by running `bazel build //cuttlefish/package:cvd` and `bazel test //...`.
+- To fix clang-format tests, run the `clang-format` executable directly.
+
+## Style Rules
+- Use type deduction (`auto`) only if it makes the code clearer to readers who aren't familiar with the project, or if it makes the code safer. Do not use it merely to avoid the inconvenience of writing an explicit type.