diff --git a/test/wcc/110_uniesc_run.c b/test/wcc/110_uniesc_run.c
index 57e606db..6c982cea 100644
--- a/test/wcc/110_uniesc_run.c
+++ b/test/wcc/110_uniesc_run.c
@@ -1,20 +1,19 @@
 /*
- * 110_uniesc_run — \u / \U Unicode escapes, end-to-end through both
- * the cstage `ww` and the wwstage `ww_ww` drivers (task #50).
+ * 110_uniesc_run — .wwi round-trip carrier for \u / \U Unicode escapes.
  *
- * Rune literals carry the raw codepoint; string literals UTF-8-encode
- * it into 1-4 bytes (ref/hare/hare/lex/lex.ha:347 lex_unicode + the
- * appendrune in lex_string). \x shares the same codepoint path, so a
- * >0x7F \x byte now widens to its 2-byte UTF-8 form in strings. Each
- * fixture returns 42 on a correct decode/encode.
+ * The value-row half (rune/string \u \U \x decode asserts) migrated to the
+ * in-language row-table test/lang/uniesc_test.ww (fold-6, task #4); this
+ * file retains ONLY the .wwi round-trip case, which is a two-package
+ * sep-build observer with no in-language @test home (it asserts the
+ * PRODUCER re-serializes a wide-rune `def` byte-exact, observed across a
+ * package boundary — not expressible as a single-compile @test).
  *
- * The dual-driver loop mirrors 640_int_cast_signed: the wwstage arm is
- * skipped when ww_ww is absent (e.g. a cstage-only build).
- *
- * The final per-driver case is a .wwi round-trip: an exported wide-rune
- * `def` re-serialized by the producer must re-parse byte-exact (the
- * write-twin of the lexer read-fix — cmd/w6c/wwi.c wwi_rune /
- * selfhost/cmd/wcc/wwi.ww wwirune emit \u/\U above 0xFF).
+ * An exported wide-rune `def` re-serialized by the producer must re-parse
+ * into the same codepoint (the write-twin of the lexer read-fix —
+ * cmd/w6c/wwi.c wwi_rune / selfhost/cmd/wcc/wwi.ww wwirune emit \u/\U above
+ * 0xFF). Runs through both the cstage `ww` and wwstage `ww_ww` drivers
+ * (task #50); the wwstage arm is skipped when ww_ww is absent (a
+ * cstage-only build), mirroring 640_int_cast_signed.
  */
 #include <stdio.h>
 #include <stdlib.h>
@@ -31,109 +30,6 @@ runwait(const char *cmd)
 	return -1;
 }
 
-struct row { const char *label; const char *src; int want; };
-
-static const struct row rows[] = {
-	/* \u (4 hex) rune → U+00E9 codepoint 233. */
-	{ "rune_u_2byte",
-	  "fn main() i32 = {\n"
-	  "  let r: rune = '\\u00e9';\n"
-	  "  if ((r: u32) == 233u32) { return 42; };\n"
-	  "  return 0;\n"
-	  "};\n",
-	  42 },
-	/* \U (8 hex) rune → U+1F600 codepoint 128512 (> 0xFFFF, the case
-	 * that forced the `0x...: rune` int-cast spelling before #50). */
-	{ "rune_U_emoji",
-	  "fn main() i32 = {\n"
-	  "  let r: rune = '\\U0001F600';\n"
-	  "  if ((r: u32) == 128512u32) { return 42; };\n"
-	  "  return 0;\n"
-	  "};\n",
-	  42 },
-	/* \u é string → 2-byte UTF-8 0xC3 0xA9. */
-	{ "str_u_2byte",
-	  "package main;\n"
-	  "import strings;\n"
-	  "fn main() i32 = {\n"
-	  "  let b: []u8 = strings.toutf8(\"\\u00e9\");\n"
-	  "  if (len(b) != 2) { return 1; };\n"
-	  "  if (b[0] != 0xc3u8) { return 2; };\n"
-	  "  if (b[1] != 0xa9u8) { return 3; };\n"
-	  "  return 42;\n"
-	  "};\n",
-	  42 },
-	/* \u € string → 3-byte UTF-8 0xE2 0x82 0xAC. */
-	{ "str_u_3byte",
-	  "package main;\n"
-	  "import strings;\n"
-	  "fn main() i32 = {\n"
-	  "  let b: []u8 = strings.toutf8(\"\\u20ac\");\n"
-	  "  if (len(b) != 3) { return 1; };\n"
-	  "  if (b[0] != 0xe2u8) { return 2; };\n"
-	  "  if (b[1] != 0x82u8) { return 3; };\n"
-	  "  if (b[2] != 0xacu8) { return 4; };\n"
-	  "  return 42;\n"
-	  "};\n",
-	  42 },
-	/* \U 😀 string → 4-byte UTF-8 0xF0 0x9F 0x98 0x80. */
-	{ "str_U_4byte",
-	  "package main;\n"
-	  "import strings;\n"
-	  "fn main() i32 = {\n"
-	  "  let b: []u8 = strings.toutf8(\"\\U0001F600\");\n"
-	  "  if (len(b) != 4) { return 1; };\n"
-	  "  if (b[0] != 0xf0u8) { return 2; };\n"
-	  "  if (b[1] != 0x9fu8) { return 3; };\n"
-	  "  if (b[2] != 0x98u8) { return 4; };\n"
-	  "  if (b[3] != 0x80u8) { return 5; };\n"
-	  "  return 42;\n"
-	  "};\n",
-	  42 },
-	/* \x ≥0x80 now yields a codepoint that UTF-8-encodes (\xe9 →
-	 * U+00E9 → 0xC3 0xA9), matching Hare's shared escape path. */
-	{ "str_x_widens",
-	  "package main;\n"
-	  "import strings;\n"
-	  "fn main() i32 = {\n"
-	  "  let b: []u8 = strings.toutf8(\"\\xe9\");\n"
-	  "  if (len(b) != 2) { return 1; };\n"
-	  "  if (b[0] != 0xc3u8) { return 2; };\n"
-	  "  if (b[1] != 0xa9u8) { return 3; };\n"
-	  "  return 42;\n"
-	  "};\n",
-	  42 },
-};
-
-static int
-run_driver(const char *driver, const struct row *r, int i)
-{
-	char src[128], tmpdir[64], outbin[128], rmcmd[160], cmd[1024];
-	snprintf(tmpdir, sizeof tmpdir, "/tmp/wwue_%d_d_%d", getpid(), i);
-	mkdir(tmpdir, 0755);
-	snprintf(src, sizeof src, "%s/wwue_%d_%d.ww", tmpdir, getpid(), i);
-	snprintf(outbin, sizeof outbin, "%s/wwue_%d_%d", tmpdir, getpid(), i);
-	snprintf(rmcmd, sizeof rmcmd, "rm -rf %s", tmpdir);
-
-	FILE *f = fopen(src, "wb");
-	if (!f) { runwait(rmcmd); return -1; }
-	fputs(r->src, f);
-	fclose(f);
-
-	snprintf(cmd, sizeof cmd, "%s build -o %s %s", driver, outbin, src);
-	if (runwait(cmd) != 0) {
-		fprintf(stderr, "row[%s]: build via %s failed\n",
-		    r->label, driver);
-		runwait(rmcmd);
-		return -1;
-	}
-
-	int got = runwait(outbin);
-
-	runwait(rmcmd);
-	return got;
-}
-
 /* run_roundtrip — sep-build a two-package program where the imported
  * package exports wide-rune defs; the producer must serialize them as
  * \u/\U so the importer re-parses the same codepoint. Returns the built
@@ -219,7 +115,6 @@ main(void)
 		{ NULL, NULL, 0 },
 	};
 
-	int n = (int)(sizeof rows / sizeof rows[0]);
 	int total = 0, fail = 0;
 	for (int d = 0; drivers[d].name; d++) {
 		if (drivers[d].gated_on_existence
@@ -228,17 +123,6 @@ main(void)
 			    drivers[d].name, drivers[d].path);
 			continue;
 		}
-		for (int i = 0; i < n; i++) {
-			int got = run_driver(drivers[d].path, &rows[i], i);
-			total++;
-			if (got != rows[i].want) {
-				fprintf(stderr,
-				    "uniesc_run[%s][%s]: exit=%d want=%d\n",
-				    drivers[d].name, rows[i].label,
-				    got, rows[i].want);
-				fail++;
-			}
-		}
 		int rt = run_roundtrip(drivers[d].path, d);
 		total++;
 		if (rt != 42) {