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diff --git a/working/hook-fail-open/test-validate-el-hook.bats.superseded b/working/hook-fail-open/test-validate-el-hook.bats.superseded
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+++ b/working/hook-fail-open/test-validate-el-hook.bats.superseded
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+#!/usr/bin/env bats
+# Tests for .claude/hooks/validate-el.sh — specifically the auto-test cap.
+#
+# The hook runs the tests matching an edited file, but only when the match
+# count is between 1 and MAX_AUTO_TEST_FILES.  Above the cap the whole block
+# was skipped with no else branch: nothing printed, exit 0, indistinguishable
+# from a passing run.  That is live for the three largest families here
+# (calendar-sync 63 test files, music 45, ai-term 35), so every edit to those
+# modules ran parens and byte-compile and zero tests, silently.
+#
+# The cap itself is fine — running 63 files per keystroke is not wanted.  The
+# defect is the silence, so these tests assert the skip announces itself and
+# names what to run.
+#
+# Each test builds a synthetic project in BATS_TEST_TMPDIR and points
+# CLAUDE_PROJECT_DIR at it, so nothing runs against the real tree.
+
+setup() {
+    HOOK="${BATS_TEST_DIRNAME}/../.claude/hooks/validate-el.sh"
+    PROJ="${BATS_TEST_TMPDIR}/proj"
+    mkdir -p "$PROJ/modules" "$PROJ/tests"
+    export CLAUDE_PROJECT_DIR="$PROJ"
+    printf '(provide (quote widget))\n' > "$PROJ/modules/widget.el"
+}
+
+# Create N test files matching the widget stem.  Each is trivially green so a
+# run below the cap succeeds and the only variable is the count.
+make_tests() {
+    local n="$1" i
+    for ((i = 1; i <= n; i++)); do
+        printf '(require (quote ert))\n(ert-deftest test-widget-%d () (should t))\n' \
+            "$i" > "$PROJ/tests/test-widget-${i}.el"
+    done
+}
+
+hook_input() {
+    printf '{"tool_input":{"file_path":"%s"}}' "$PROJ/modules/widget.el"
+}
+
+# ------------------------------- Normal cases -------------------------------
+
+@test "under the cap: runs the tests and stays quiet on success" {
+    make_tests 3
+    run bash -c "$(printf '%q' "$HOOK") <<< '$(hook_input)'"
+    [ "$status" -eq 0 ]
+    [[ "${output,,}" != *"skipped"* ]]
+}
+
+# ------------------------------ Boundary cases ------------------------------
+
+@test "exactly at the cap: still runs the tests" {
+    make_tests 20
+    run bash -c "$(printf '%q' "$HOOK") <<< '$(hook_input)'"
+    [ "$status" -eq 0 ]
+    [[ "${output,,}" != *"skipped"* ]]
+}
+
+# -------------------------------- Error cases -------------------------------
+
+@test "over the cap: says it skipped rather than exiting silently" {
+    make_tests 21
+    run bash -c "$(printf '%q' "$HOOK") <<< '$(hook_input)'"
+    # Must not fail the edit — the cap is deliberate, the silence is not.
+    [ "$status" -eq 0 ]
+    [[ "${output,,}" == *"skipped"* ]]
+}
+
+@test "over the cap: names the count and how to run them" {
+    make_tests 21
+    run bash -c "$(printf '%q' "$HOOK") <<< '$(hook_input)'"
+    [[ "$output" == *"21"* ]]
+    [[ "$output" == *"make test-file"* ]]
+}