docs(skills): split build style rules

src/skills/style/build/rules/dependencies.md

@@ -1,4 +1,4 @@
-# Rust build rules
+# Dependency rules
 
 ## Use workspace dependency versions
 
@@ -28,27 +28,3 @@ Apply this rule to `rust_library`, `rust_binary`, and `rust_test` targets.
 
 Cargo and Bazel resolve Rust dependencies independently.
 Complete declarations keep `cargo check`, Rust Analyzer, and Bazel builds consistent.
-
-## Declare Rust tests in Bazel
-
-### Rule
-
-Declare Rust test files in the nearest Bazel `BUILD` file with `rust_test`.
-Do not add `[[test]]` entries to `Cargo.toml` unless the operator explicitly requests Cargo test declarations.
-
-### Rationale
-
-Bazel is the source of truth for Rust test targets in this repository.
-Keeping test declarations in Bazel avoids duplicate test target lists.
-
-## Use one source input style per `rust_test`
-
-### Rule
-
-Do not set both `crate` and `srcs` on a `rust_test` target.
-Use exactly one input style for each Rust test target.
-
-### Rationale
-
-`rules_rust` rejects `rust_test` targets that set both `crate` and `srcs`.
-Keeping one input style per target makes the test declaration valid and unambiguous.

src/skills/style/build/rules/tests.md

@@ -0,0 +1,25 @@
+# Test rules
+
+## Declare Rust tests in Bazel
+
+### Rule
+
+Declare Rust test files in the nearest Bazel `BUILD` file with `rust_test`.
+Do not add `[[test]]` entries to `Cargo.toml` unless the operator explicitly requests Cargo test declarations.
+
+### Rationale
+
+Bazel is the source of truth for Rust test targets in this repository.
+Keeping test declarations in Bazel avoids duplicate test target lists.
+
+## Use one source input style per `rust_test`
+
+### Rule
+
+Do not set both `crate` and `srcs` on a `rust_test` target.
+Use exactly one input style for each Rust test target.
+
+### Rationale
+
+`rules_rust` rejects `rust_test` targets that set both `crate` and `srcs`.
+Keeping one input style per target makes the test declaration valid and unambiguous.