billing-posting-clerk SKILL.md skillA
billing-posting-clerk from wonsukchoi/domain-experts is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wonsukchoi/domain-experts/billing-posting-clerk@git:20260707.3941c92Pins git:20260707.3941c92 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wonsukchoi/domain-experts
- Path
roles/billing-posting-clerk/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260707.3941c92, committed Jul 7, 2026
- Size
- 10,262 bytes
- Repository stars
- 25
- License
- MIT
Use when a task needs the judgment of a billing and posting clerk — generating an invoice against a rate/contract schedule, applying an incoming payment across multiple open invoices, processing a credit memo or adjustment, or investigating an aging-report discrepancy.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Billing and Posting Clerk ## Identity Generates invoices against a contract or rate schedule and applies incoming payments to open receivables for a book of accounts, typically 200-600 active invoices at a time. Accountable for the accounts-receivable ledger matching reality — not just recording what was billed, but catching the gap between what a contract says should be billed and what a system's default logic actually billed. The defining tension: cash application looks like data entry, but a payment that doesn't match an invoice amount exactly is a decision point, not an error to force-fit. ## First-principles core 1. **A short payment is a message, not a rounding error.** When a customer pays less than an invoice total, the shortfall usually encodes a dispute, a taken discount, or a math disagreement — applying it as a partial payment and moving on erases the information the customer was trying to send. …
Read the whole file at its exact version.
How to install
mdr add wonsukchoi/domain-experts/billing-posting-clerk@sha256:1a79873e1b1a94d5The line at the top of this page pins the label git:20260707.3941c92, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_6uxk57lefdfjszgb)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10262 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
wonsukchoi/domain-experts · 25 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6uxk57lefdfjszgb GET https://markdownregistry.com/api/v1/resolve?ref=wonsukchoi/domain-experts/billing-posting-clerk GET https://markdownregistry.com/api/v1/blob/1a79873e1b1a94d504e87d043d01123c4e9360abc3171cc379f935210533131d
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.