GEMINI CLIとの会話を自動でZETTELKASTENに記録する仕組みを作った

#!/bin/bash
# gemini_archiver.sh
# Monitors Gemini CLI chat logs and archives them to Obsidian daily notes.
# Multi-session support: Tracks each session independently.

GEMINI_TMP_BASE="$HOME/.gemini/tmp"
OBSIDIAN_ROOT="$HOME/dotfiles/zettelkasten"
STATE_DIR="$HOME/.gemini/archiver_states"

# Ensure jq is available
if ! command -v jq > /dev/null; then
    echo "Error: jq is required but not installed." >&2
    exit 1
fi

get_date_vars() {
    YYYY=$(date +%Y)
    MM=$(date +%m)
    DD=$(date +%d)
    DATE_STR="${YYYY}${MM}${DD}"
}

process_session() {
    local session_file="$1"
    
    # Extract Session UUID from JSON content
    local session_id=$(jq -r '.sessionId // empty' "$session_file" 2>/dev/null)
    
    if [ -z "$session_id" ]; then
        return
    fi
    
    local state_file="$STATE_DIR/${session_id}.state"
    local last_id=""
    
    if [ -f "$state_file" ]; then
        last_id=$(cat "$state_file")
    fi
    
    # Check if session file has messages
    local has_messages=$(jq '.messages | length' "$session_file" 2>/dev/null)
    if [ -z "$has_messages" ] || [ "$has_messages" -eq 0 ]; then
        return
    fi

    # Construct jq filter
    local jq_filter
    if [ -z "$last_id" ]; then
        # New session tracking: Get ALL messages
        jq_filter='.messages[] | select(.type == "user" or .type == "gemini")'
    else
        # Existing session: Get messages AFTER last_id
        # Safety: If last_id is missing (null index), output empty to avoid duplication
        jq_filter='.messages as $m | ($m | to_entries | map(select(.value.id == "'"$last_id"'")) | .[0].key) as $idx | if $idx == null then empty else $m[$idx+1:][] end | select(.type == "user" or .type == "gemini")'
    fi

    local tmp_output=$(mktemp)
    
    # Run jq
    jq -r "$jq_filter | \"**\" + (.type | ascii_upcase) + \"**: \" + .content + \"\n\"" "$session_file" > "$tmp_output"
    
    if [ -s "$tmp_output" ]; then
        get_date_vars
        local target_dir="$OBSIDIAN_ROOT/dagnetz/$YYYY/$MM/$DD"
        local target_file="$target_dir/📓${DATE_STR}_gemini-log.md"
        
        mkdir -p "$target_dir"
        if [ ! -f "$target_file" ]; then
            echo "# $YYYY-$MM-$DD Gemini Log" > "$target_file"
        fi
        
        # Append newline and content
        echo "" >> "$target_file"
        cat "$tmp_output" >> "$target_file"
        
        # Update state file with the NEW last ID
        local new_last_id=$(jq -r '.messages[] | select(.type == "user" or .type == "gemini") | .id' "$session_file" | tail -1)
        if [ -n "$new_last_id" ]; then
            echo "$new_last_id" > "$state_file"
        fi
    fi
    
    rm "$tmp_output"
}

# Main Loop
while true; do
    # Find ALL session files modified in the last 60 minutes
    find "$GEMINI_TMP_BASE" -type f -path "*/chats/session-*.json" -mmin -60 2>/dev/null | while read -r session_file; do
        process_session "$session_file"
    done
    
    sleep 5
done