feat(session): maintain canonical task state

scripts/session-state.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -euo pipefail
-root=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd); dir="$root/.ai-session"; path="$dir/state.json"
-if [ "${1:-}" = --pointer ]; then [ -f "$path" ] && printf 'Task state is available in .ai-session/state.json; read it only if needed.\n'; exit 0; fi
-goal=${AI_TASK_GOAL:-}; goal=${goal:0:240}; goal_json=$(printf '%s' "$goal" | sed 's/[\\]/\\\\/g; s/"/\\"/g'); mkdir -p "$dir"
-printf '{"goal":"%s","changedFiles":[],"verified":[],"pending":[],"importantFindings":[],"updatedAt":"%s"}\n' "$goal_json" "$(date -u +%Y-%m-%dT%H:%M:%SZ)" > "$path"
+root=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)
+arguments=()
+if [ "${AI_TASK_GOAL+x}" = x ]; then arguments+=(--goal "$AI_TASK_GOAL"); fi
+python3 "$root/shared/hooks/scripts/session-state.py" "${arguments[@]}" "$@"