#!/bin/bash
# Save session context on stop for restoration in next session
# Event: Stop
# Saves: branch, modified files, recent commits, phase

SESSION_DIR="${CLAUDE_PROJECT_DIR:-.}/.claude/sessions"
mkdir -p "$SESSION_DIR"

SESSION_FILE="$SESSION_DIR/latest.json"

# Gather session state
BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
MODIFIED=$(git diff --name-only 2>/dev/null | head -20 | jq -R -s 'split("\n") | map(select(. != ""))')
STAGED=$(git diff --cached --name-only 2>/dev/null | head -20 | jq -R -s 'split("\n") | map(select(. != ""))')
RECENT_COMMITS=$(git log --oneline -5 2>/dev/null | jq -R -s 'split("\n") | map(select(. != ""))')
PHASE=$(grep -m1 'Current Phase' "${CLAUDE_PROJECT_DIR:-.}/docs/phases-plan.md" 2>/dev/null || echo "unknown")
TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

# Write session file
cat > "$SESSION_FILE" << ENDJSON
{
  "timestamp": "$TIMESTAMP",
  "branch": "$BRANCH",
  "phase": "$PHASE",
  "modified_files": $MODIFIED,
  "staged_files": $STAGED,
  "recent_commits": $RECENT_COMMITS
}
ENDJSON

exit 0