volt: census of every CHECK entry point at HEAD, and the quill draft table repaired to its lane

CHECK-q143

@@ -0,0 +1,55 @@
+#!/bin/bash
+# CHECK-q143 -- three legs over every CHECK entry point in this tree.
+#
+#   selftest  20 cells on fixture trees: discovery (a near-miss named CHECKER is
+#             not an entry point), the five codes the runner can produce
+#             (0, 1, 2, 124 timeout, python shebang), the four mutants the
+#             grader must name (new path, missing path, 0->1, 1->0), a baseline
+#             that is absent or malformed reading rc 2, and two takes being
+#             byte-identical.
+#   paths     the entry-point SET, graded against the baseline, without running
+#             anything -- 0.2 s, and it is the leg that notices evidence leaving
+#             the tree.
+#   sweep     every entry point run, its exit code compared with the code the
+#             baseline records. Both directions: a green that went red is a
+#             reverted repair, a red that went green is a repair nobody signed.
+#
+# Exit codes: 0 all legs green, 1 a leg faulted, 2 a leg could not grade.
+set -u
+HERE="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+ROOT="$(cd "$HERE/../../.." && pwd)"
+TOOL="$HERE/check_sweep.py"
+BASE="$HERE/check_entry_baseline.tsv"
+PY="${PYTHON:-python3}"
+rc=0
+legs=0
+faults=0
+
+run_leg() {
+    name="$1"; shift
+    legs=$((legs + 1))
+    out="$("$PY" "$TOOL" --repo "$ROOT" --baseline "$BASE" "$@" 2>&1)"
+    lrc=$?
+    if [ "$lrc" -eq 0 ]; then
+        printf '  %-8s PASS   rc=0  %s\n' "$name" "$(printf '%s' "$out" | tail -1)"
+    elif [ "$lrc" -eq 1 ]; then
+        faults=$((faults + 1))
+        printf '  %-8s FAULT  rc=1  %s\n' "$name" "$(printf '%s' "$out" | tail -1)"
+        printf '%s\n' "$out" | grep -E '^(FAIL|!)' | head -8
+    else
+        faults=$((faults + 1))
+        printf '  %-8s UNGRAD rc=%s  %s\n' "$name" "$lrc" "$(printf '%s' "$out" | tail -1)"
+    fi
+    [ "$lrc" -eq 0 ] || rc=1
+}
+
+run_leg selftest --selftest
+run_leg paths --paths
+run_leg sweep --check
+
+if [ "$rc" -eq 0 ]; then
+    echo "q143: $legs leg(s), all passed"
+else
+    echo "q143: $legs leg(s), $faults fault(s)"
+fi
+exit "$rc"