Today's Agent Skill: Inbox-to-Invoice Reconciler
What It Does
Finance teams lose hours every month cross-checking vendor invoices against what was actually approved in email threads. The invoice says $4,200; someone approved $3,800 in a Slack-adjacent email chain three weeks ago. Nobody catches it until the quarterly audit.
How It Works
This skill scans a batch of invoices against a mailbox or thread archive, extracts the approved amount, scope, and approver from the original correspondence, then flags every mismatch with the exact quote that contradicts the invoice line. It outputs a reconciliation table sorted by dollar variance, not by date.
How to Deploy It
Drop the SKILL.md below into your agent's skills directory and point it at a read-only mailbox export plus an invoice folder. Any SKILL.md-compatible agent will pick up the trigger phrases automatically — no wiring beyond file access.
SKILL.md — Ready to Deploy
# Inbox-to-Invoice Reconciler
## Description
Reconciles incoming vendor invoices against the email correspondence that authorized them. Surfaces amount mismatches, scope creep, missing approvals, and duplicate billing by tracing each invoice line back to its originating thread. Built for AP clerks, office managers, and anyone who approves spend over email and pays it in a separate system.
## Trigger
Activates on: reconcile invoices, check this invoice against email, did we approve this, invoice audit, AP reconciliation, vendor billing check, why is this invoice higher, match invoices to approvals. Also triggers when a user shares an invoice file and an email thread in the same request, even without explicit reconciliation language.
## Input
- Invoice set: PDF, CSV, or structured text. Minimum fields: vendor, invoice number, line items, amounts, date.
- Correspondence source: mailbox export (.mbox, .eml), thread paste, or a shared folder of saved messages.
- Optional: approval threshold (default $500) below which variances are noted but not escalated.
## Steps
1. Parse every invoice into normalized line items: vendor, description, quantity, unit price, total.
2. For each vendor,Copy the full SKILL.md and drop it into your agent's skills directory to activate this skill.