What’s inside

One SKILL.md (the playbook) + one starter template. A preview:

Expense Tracker

When to use

• You keep losing track of receipts and dread expense time
• You want a weekly spending summary without opening a spreadsheet
• Tax season is coming and your deductions live in a shoebox of PDFs
• You're self-employed and need clean expense records your accountant can actually use
• You want to spot subscription creep or budget leaks before they cost you real money

Workflow

Create one dedicated place for receipts: a forwarding email address, a chat thread, or an upload folder — whatever you'll actually use in the moment. The system only works if forwarding a receipt takes less effort than ignoring it. Note which bank exports you can provide (CSV downloads; never hand over login credentials).

1. Set up the intake (input: your tools → output: forwarding channel)

From each receipt pull four things: merchant, date, amount, category. Photos go through a vision pass; PDFs get their text extracted first. Every row carries its source file name so you can trace any number back to the original receipt in seconds.

1. Extract the facts (input: receipt image/PDF → output: structured row)

Before anything gets filed, you see each row and correct the mistakes — wrong merchant names, split categories, foreign currencies. This is the human checkpoint that makes the whole thing trustworthy. Anything the extractor can't read gets kicked back to you instead of guessed.

1. Review and confirm (input: extracted rows → output: confirmed rows)

Confirmed rows append to your yearly bookkeeping sheet, and the original files archive into monthly folders. The sheet is the single source of truth; the archive is the audit trail. Keep both somewhere your accountant can open.

1. File and archive (input: confirmed rows → output: bookkeeping sheet + archive)

Weekly: a simple expense report — total, by category, anomalies flagged. Monthly: budget vs. actual per category, plus a list of recurring subscriptions with amounts. Yearly: a tax summary of deductible items, with anything ambiguous listed separately for you or your accountant to decide.

1. Run the summaries (input: bookkeeping sheet → output: reports on schedule)

Output spec

• Expense rows: date, merchant, amount, category, source file reference
• Weekly report: total spend, top categories, new subscriptions detected, anomalies flagged
• Monthly budget view: planned vs. actual per category, subscription list with monthly cost
• Annual tax summary: deductible totals, uncertain items listed separately with reasons
• Everything traceable to a source file; nothing auto-filed without your confirmation

Good vs. bad examples

• ❌ Bad row: "Amazon — $43.21 — misc" (unsearchable, useless at tax time)
• ✅ Good row: "2026-10-11 · Amazon · $43.21 · Offic

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