diff --git a/implementations/Crafter.Build-Clang.cpp b/implementations/Crafter.Build-Clang.cpp
index 550023e..f93451a 100644
--- a/implementations/Crafter.Build-Clang.cpp
+++ b/implementations/Crafter.Build-Clang.cpp
@@ -1651,6 +1651,10 @@ Build options:
   -v, --verbose             Verbose progress output.
   -q, --quiet               Suppress progress output.
   --project=<path>          Path to the project file (default: ./project.cpp).
+  --                        Ends this tool's options. Every later word is a
+                            project arg, even one that looks like an option or
+                            a verb; after test, lint or format, a glob; after
+                            run, the script's name and then its args.
 
 Test options (after the `test` subcommand):
   --list                    Enumerate matching tests without running them.
@@ -1762,6 +1766,9 @@ std::int32_t Crafter::Run(std::int32_t argc, char** argv) {
         RunLintOptions lintOpts;
         RunScriptOptions scriptOpts;
         Progress::Verbosity verbosity = Progress::Verbosity::Default;
+        // Set by `--`: every later word is an operand of the verb, never an
+        // option or a verb of this tool.
+        bool operandsOnly = false;
 
         for (std::int32_t i = 1; i < argc; ++i) {
             std::string_view arg = argv[i];
@@ -1773,11 +1780,25 @@ std::int32_t Crafter::Run(std::int32_t argc, char** argv) {
             // variant hash and so the directory the project builds into.
             if (scriptOpts.named) {
                 scriptOpts.args.emplace_back(arg);
-            } else if (runScript && !arg.starts_with("-")) {
+            } else if (runScript && (operandsOnly || !arg.starts_with("-"))) {
                 // The first word after `run`, even one that is a verb
                 // elsewhere. Options before it keep their usual meaning.
                 scriptOpts.name = arg;
                 scriptOpts.named = true;
+            } else if (operandsOnly) {
+                if (runTests) {
+                    testOpts.globs.emplace_back(arg);
+                } else if (runLint || runFormat) {
+                    lintOpts.globs.emplace_back(arg);
+                } else {
+                    projectArgs.push_back(arg);
+                }
+            } else if (arg == "--") {
+                // Ends this tool's options and is never forwarded itself. It
+                // used to land in projectArgs as a word of its own, giving the
+                // project a variant hash of its own, and every sibling project
+                // that inherits the args one as well.
+                operandsOnly = true;
             } else if (arg == "--version") {
                 // Answered here, before the project file is looked for, so
                 // it works in any directory and is never forwarded to