Argtype descriptions name a literal parameter's cost, a phase's error is the phase's report, the ^-code table's grave-accent and dieresis rows (from dev ee86ca467512)

mac/argtype_registry.h

@@ -87,7 +87,18 @@ std::vector<std::tuple<std::string, std::string, std::string, std::string, modif
       R"((?:.|\n)*)", R"((lambda s : __import__("kutil").rest_split(s, N)))",
       nullptr },
 
-    { "literal", "literal text passed without interpretation",
+    // A description is Klammertext source (desc.klammertext in
+    // Argtype_registry::parameters()), rendered by ref/ for kdesc --argtypes:
+    // a special it mentions is caret-quoted (^@c), and it is one line, since
+    // the programmer's dump (kdiag --machine) shows the first line only.
+    // kdesc --argtypes is where klammertext_description.md sends a reader
+    // for the argtypes, so the practical consequence of declaring a literal
+    // parameter -- the named close -- is stated here, not only on @c
+    // (TODO 76, 2026-10-13).
+    { "literal", "literal text passed without interpretation; a klammer with a "
+      "literal parameter (always its last positional one) is closed by its "
+      "name, as ^@c ... c^@ is, because the content may hold ^@ and the end "
+      "cannot be found by counting",
       R"((?:.|\n)*)", "str",
       pyformat_string },
 
@@ -97,7 +108,10 @@ std::vector<std::tuple<std::string, std::string, std::string, std::string, modif
     // has its "^" forms processed as the value is built, this keeps them:
     // "^@date" stays "^@date", so it re-reads as the text "@date" rather
     // than as a klammer application.  (2026-09-13)
-    { "klammertext", "Klammertext source, kept exactly as written",
+    { "klammertext", "Klammertext source, kept exactly as written, for a "
+      "description a Machine renders later: unlike literal, the quoting "
+      "carets are kept, so a quoted klammer stays quoted when the text is "
+      "read again, and no named close is required",
       R"((?:.|\n)*)", "str",
       pyformat_string },
 };