testsAndMisc/scripts/check_append_only_sessions.sh

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#!/bin/bash
# Enforce append-only semantics for session log artifacts.
set -euo pipefail
is_session_log() {
local file_path="$1"
[[ "$file_path" =~ ^docs/superpowers/sessions/.*\.(jsonl|log|txt)$ ]]
}
has_deleted_lines() {
local file_path="$1"
git diff --cached --unified=0 -- "$file_path" \
| grep -E '^-' \
| grep -Ev '^--- '
}
main() {
local staged_files
staged_files="$(git diff --cached --name-only --diff-filter=ACMR)"
local checked=0
local failures=0
while IFS= read -r file_path; do
[[ -z "$file_path" ]] && continue
if ! is_session_log "$file_path"; then
continue
fi
checked=$((checked + 1))
if has_deleted_lines "$file_path" >/dev/null; then
echo "${file_path}: append-only violation (deletions detected)"
echo " Use a new appended line instead of modifying historical entries."
failures=$((failures + 1))
fi
done <<< "$staged_files"
if (( checked == 0 )); then
echo "✓ No session logs staged"
exit 0
fi
if (( failures > 0 )); then
echo "❌ Append-only session checks failed"
exit 1
fi
echo "✓ Append-only session checks passed"
}
main "$@"