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+## Test environments
+
+- local: x86_64-pc-linux-gnu
+- GitHub Actions
+  - { os: macos-latest, r: "release" }
+  - { os: windows-latest, r: "release" }
+  - { os: ubuntu-latest, r: "devel", http-user-agent: "release" }
+  - { os: ubuntu-latest, r: "release" }
+  - { os: ubuntu-latest, r: "oldrel-1" }
+- devtools
+  - `check_rhub()`
+  - `check_win_release()`
+
+## R CMD check results
+
+- There were no ERRORs or WARNINGs.
+- There was a NOTE about CRAN incoming feasibility: `Size of tarball: 15678459 bytes`
+  - Most of this size is a tarball of vendored Rust source code,
+    since this package contains all the Rust source code of the dependencies.