The Cowork Expense Report Kit — Drop a Folder of Messy Receipts on Claude Cowork and Get Back a Reconciled Spreadsheet (Then Teach It the Job Forever)

The companion to the full video — the one where 27 messy receipts (PDF invoices, blurry phone photos, filenames like IMG_2047.png) became month-organized folders, a reconciled expenses.xlsx, and a written summary in about 8 minutes of real, unedited screen recording. The totals were checked against a known ground truth and matched to the cent — twice ($1,558.28 for the first quarter, then $561.42 on the July rerun). INSIDE: (1) THE PROMPT — the exact three-ask paste that produced the whole run, plus why describing what DONE looks like beats writing steps. (2) THE SKILL FILE — the complete expense-report SKILL.md ready to install (Save skill button or Settings → Skills), with the golden rule baked in: read every receipt, invent nothing; unreadable numbers get flagged, never fabricated. (3) THE ONE-SENTENCE RERUN — every month after is literally 'Run my Expense Report skill on this folder.' (4) THE RUN TIMELINE — what a healthy run looks like minute by minute, including the permission dialog and the plan checkpoint. (5) FOUR GOTCHAS + FIRST-RUN CHECKLIST — the skill-library trap that makes new sessions say 'skill not found', the dedicated-folder rule, Allow vs Always allow, and the one-known-number verification habit. Independent field manual from Hyperautomation Labs — not affiliated with Anthropic.

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