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diff --git a/linux/translate_subx_debug b/linux/translate_subx_debug
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+#!/bin/sh
+# Translate given SubX files with debug information on Linux.
+#
+# Mu provides 3 canonical ways to translate unsafe SubX programs:
+#   0. The C++ translator 'bootstrap translate' can generate traces for
+#   debugging on Linux or BSD or Mac, but doesn't support any syntax sugar.
+#   1. The self-hosted translator can be run natively on Linux using
+#   'translate_subx'. It is fast and supports all syntax sugar, but you get no
+#   trace for debugging.
+#   2. The self-hosted translator can be run emulated on Linux or BSD or Mac
+#   using 'translate_subx_emulated'. It supports all syntax sugar. However, it
+#   can be slow if you generate traces.
+#
+# This script fills in the gap above by stitching together aspects from
+# multiple approaches. It translates syntax sugar natively, but emulates lower
+# levels using the C++ translator. The result is complete and relatively fast
+# even when generating traces.
+#
+# The cost: it needs Linux. There is no script to generate traces while
+# running emulated on BSD or Mac. That's often impractically slow.
+
+set -e
+
+cat $*          |./braces          > a.braces
+cat a.braces    |./calls           > a.calls
+cat a.calls     |./sigils          > a.sigils
+
+bootstrap/bootstrap --debug translate a.sigils -o a.elf
+
+chmod +x a.elf