Lift drill into evals/ at 013fcb8b7dbefd6d3fa4653493e5d2ec8e7f985b

rsync of obra/drill@013fcb8b7d into superpowers/evals/, excluding
.git/, .venv/, results/, .env/, __pycache__/, *.egg-info/,
.private-journal/.

The drill repo is unaffected by this commit; archival is a separate
manual step after this PR merges.

Source SHA recorded at evals/.drill-source-sha for divergence
detection.

evals/bin/tool-not-called

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+set -euo pipefail
+command -v jq >/dev/null || { echo "jq required"; exit 127; }
+
+TOOL="$1"
+FILE="tool_calls.jsonl"
+
+COUNT=$(jq -s "[.[] | select(.tool == \"$TOOL\")] | length" "$FILE" 2>/dev/null || echo 0)
+
+if [ "$COUNT" -eq 0 ]; then
+    echo "PASS: $TOOL never called"
+    exit 0
+else
+    echo "FAIL: $TOOL called $COUNT time(s) (expected 0)"
+    exit 1
+fi