claudetool: improve codereview
Do a bunch of un-vibecoding and bug fixing.
Unfortunately, lots left.
Get rid of vet; gopls check covers it.
Add testing infrastructure and a bunch of fixtures.
diff --git a/claudetool/testdata/new_test_build_error.txtar b/claudetool/testdata/new_test_build_error.txtar
new file mode 100644
index 0000000..2fe1d34
--- /dev/null
+++ b/claudetool/testdata/new_test_build_error.txtar
@@ -0,0 +1,27 @@
+Adding a new test with build errors is a regression
+
+-- p.go --
+package p
+
+-- .commit --
+Initial commit with no tests
+
+-- p_test.go --
+package p
+
+import "testing"
+
+func TestP(t *testing.T) {
+ (
+}
+
+-- .commit --
+Add test with build error
+
+-- .run_test --
+Test regressions detected between initial commit (cf75ed70e940ce33a17a70b1894ad053b67731c0) and HEAD:
+
+1: sketch.dev: Previously had no tests, now has build/vet errors
+
+
+Please fix before proceeding.