break.sh believes a suite's exit status, not the shape of its output

It decided whether a suite noticed by grepping its output for a
"N passed, M failed" summary line. That is right for the suites that
print one, since they print it only when something failed - and
impossible for the three that never print one at all. docs, terminal
and voyager report in their own words, so a break any of them caught
loudly was reported as "NOTHING CAUGHT THE BREAK".

That is the one wrong answer the tool exists never to give, and it was
turning up in a third place: the header already tells the story of the
first two. It made the whole docs suite unverifiable by the harness the
project uses to decide whether a check is worth having.

Every suite already exits nonzero when it fails, so that is the signal
now. The summary line is still printed where a suite keeps a count, and
the suite's own last line stands in where it does not.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E2JrLzFvuFX9fgi1LDRjrW

Tests/break.sh

@@ -104,12 +104,24 @@ for suite in "$@"; do
         die "no such suite: $suite"
     fi
     printf -- '---- %s ----\n' "$name"
-    if "$run" 2>&1 | tee "$KEEP.out" | grep -E '^\s*\[FAIL\]' | sed 's/^ *//'; then
+    "$run" > "$KEEP.out" 2>&1
-        :
+    status=$?
-    fi
+    grep -E '^\s*\[FAIL\]' "$KEEP.out" | sed 's/^ *//'
-    if grep -qE '^[0-9]+ passed, [0-9]+ failed' "$KEEP.out"; then
+
+    # THE SUITE'S EXIT STATUS IS THE SIGNAL, not the shape of its last line. This used to
+    # look for a "N passed, M failed" summary, which is right for the suites that print one
+    # - they print it only when something failed - and impossible for the three that never
+    # do. docs, terminal and voyager report in their own words and say so with their exit
+    # status, so a break they caught loudly was answered with "NOTHING CAUGHT THE BREAK":
+    # the one wrong answer this tool exists never to give, turning up in a third place.
+    if [ "$status" -ne 0 ]; then
         NOTICED=1
+        # The count where a suite keeps one, and its own last word where it does not.
+        if grep -qE '^[0-9]+ passed, [0-9]+ failed' "$KEEP.out"; then
             grep -E '^[0-9]+ passed, [0-9]+ failed' "$KEEP.out" | tail -1
+        else
+            tail -1 "$KEEP.out"
+        fi
     else
         printf '%s%s did not notice%s\n' "$RED" "$name" "$RESET"
     fi