#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)"
cd "$ROOT_DIR"

OUT_FILE="docs/ai/SESSION_HANDOFF.md"
TS="$(date '+%Y-%m-%d %H:%M:%S')"
BRANCH="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo 'n/a')"
LAST_COMMIT="$(git log -1 --pretty='format:%h %ad %s' --date=short 2>/dev/null || echo 'n/a')"

mkdir -p "$(dirname "$OUT_FILE")"

cat >> "$OUT_FILE" <<EOF

---

## CHECKPOINT $TS

### Stato rapido
- Branch: $BRANCH
- Ultimo commit: $LAST_COMMIT

### File modificati (git status --short)
\`\`\`
$(git status --short 2>/dev/null || true)
\`\`\`

### Ultimi file toccati (max 20)
\`\`\`
$(git status --short 2>/dev/null | awk '{print $2}' | sed '/^$/d' | head -n 20)
\`\`\`

### Bug trovati / verificati in questa sessione
- 

### Decisioni prese
- 

### Prossimo step operativo
- 

### Prompt di ripartenza
Riparti da docs/ai/SESSION_HANDOFF.md, usa l'ultimo CHECKPOINT, continua dal "Prossimo step operativo" senza rifare analisi generale.
EOF

echo "Checkpoint aggiornato in: $OUT_FILE"