Ledger Monthly Report

Use this skill for monthly financial summaries and charts.

Required rules

1. Always convert/aggregate using amount_cny (RMB baseline).
2. Report must include:
• expense by tag: amount + ratio
• expense by major category: amount + ratio
• top expense heads
• income/expense totals and ratio
3. Charts must include:
• tag bar chart
• tag pie chart
• major-category chart
• income/expense ratio chart
4. All charts must display numeric amount labels.
5. Send charts to user, then delete local chart files if requested.
6. Generated chart files must stay ignored by git (reports/*.png already ignored).

Command

IMPORTANT: Get current date on entry to determine the default month.

# Get current year-month in Asia/Taipei timezone
CURRENT_MONTH=$(TZ='Asia/Taipei' date +%Y-%m)

If user does not specify a month, use $CURRENT_MONTH as default.

Use project script (all paths relative to workspace root):

. projects/.venv-chart/bin/activate
python projects/scripts/monthly_report_cny.py \
  --data-root projects/data \
  --month "$CURRENT_MONTH" \
  --out-dir projects/reports

Outputs (under projects/reports/):

• projects/reports/_summary_cny.json
• projects/reports/_expense_by_tag_cny.png
• projects/reports/_expense_by_tag_pie_cny.png
• projects/reports/_expense_by_major_cny.png
• projects/reports/_income_expense_ratio_cny.png

Reply template

• 总收入（CNY）
• 总支出（CNY）
• 净额（CNY）
• 按标签支出（金额+占比）
• 按大类支出（金额+占比）
• 大头支出 Top N
• 收支占比（收入 vs 支出）

Then send charts.

Cleanup

If user says charts can be removed after sending:

• delete the generated reports/*.png files for that month.
• keep summary json unless user asks to remove it too.