WIP: re-vendor canonical files and gate phases

Model: opus-5-5

script/test

@@ -1,17 +1,19 @@
 #!/bin/sh
-# script/test: run the test suite. On failure, rerun verbosely so the
-# failing tests are visible in the output.
+# script/test: run the test suite. Testing is a phase of the Dockerfile
+# and this builds that phase alone, on the same terms as script/lint:
+# --target because a phase that is not the last stage is built only when
+# named, --no-cache because a cached test layer is a test that did not
+# run, and a tag so each build replaces the previous image.
 set -eu
 
-ROOT="$(cd "$(dirname "$0")/.." && pwd -P)"
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd -P)"
+ROOT="$(cd "$SCRIPT_DIR/.." && pwd -P)"
 
 main() {
     cd "$ROOT"
-    go test -short -timeout 30s -race -cover ./... || {
-        echo "--- Rerunning with -v for details ---"
-        go test -short -timeout 30s -race -v ./...
-        exit 1
-    }
+    docker build --no-cache \
+        --target test \
+        -t "$("$SCRIPT_DIR/projectname")-test" .
 }
 
 main "$@"