Further work on Golang RPC, import manipulation, and formatting

rewrite-go/.gitignore

@@ -1 +1 @@
-rewrite/test-classpath.txt
+test-classpath.txt

rewrite-go/Makefile

@@ -0,0 +1,16 @@
+.PHONY: test parity
+
+# Default test run — what CI executes. Build-tag-gated tests stay out.
+test:
+	go test ./...
+
+# Printer fidelity audit. Loads every fixture under
+# test/printer-corpus/, parses + prints, and asserts byte-equality.
+# Gated behind the `parityaudit` build tag so it never runs in CI;
+# devs invoke it manually when investigating printer regressions.
+#
+# Trade-off (per the eng review's P2 decision): corpus regressions ship
+# undetected by automation in exchange for fast iteration and simple
+# test infra. Re-evaluate if a corpus-detectable bug ever lands.
+parity:
+	go test -tags parityaudit ./pkg/printer/...

rewrite-go/build.gradle.kts

@@ -30,6 +30,12 @@ tasks.withType<Javadoc>().configureEach {
     exclude("**/G.java")
 }
 
+// Test fixtures for the GoMod conformance corpus are .gomod / .gosum / .json
+// files; none of these formats accept a leading license header.
+configure<nl.javadude.gradle.plugins.license.LicenseExtension> {
+    excludePatterns.addAll(listOf("**/*.gomod", "**/*.gosum", "**/*.json"))
+}
+
 val goBuild = tasks.register<Exec>("goBuild") {
     workingDir = projectDir
     // Use relative path to avoid absolute paths in cache key (Exec args are cache inputs)