Keep only ignore rules for generated project files

Author: samuel-williams-shopify

.gitignore

@@ -6,7 +6,8 @@
 /.covered.db
 /external
 
-/.context/
-/coverage/
+# Installed by ruby/setup-ruby with bundler-cache enabled:
 /vendor/bundle/
+
+# Generated by utopia:project:static:
 /docs/

readme.md

@@ -15,6 +15,6 @@ For this gem's releases, follow [the maintainer instructions](https://github.com
 
 Run `bundle exec bake test` for the test suite and `bundle exec rubocop` for style checks. The test, coverage, documentation, and RuboCop workflows follow `bake modernize` conventions.
 
-Install maintenance dependencies with `BUNDLE_WITH=maintenance bundle install`, then run `BUNDLE_WITH=maintenance bundle exec bake agent:context:install` for local agent guidance. Generated `agents.md` and `.context/` files are ignored.
+Install maintenance dependencies with `BUNDLE_WITH=maintenance bundle install`, then run `BUNDLE_WITH=maintenance bundle exec bake agent:context:install` for local agent guidance. Generated `agents.md` and `.agents/context/` files are ignored.
 
 Review modernization changes before committing them. Retain the Socketry certificate, the `~/.gem/socketry-release.pem` signing key path, and packaged release templates. Publishing is handled by `release-publish.yaml`; do not add a second publishing hook to `bake.rb`.