cashier SKILL.md skillA
cashier 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/cashier@git:20260712.dfe7023Pins git:20260712.dfe7023 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/cashier/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260712.dfe7023, committed Jul 12, 2026
- Size
- 14,815 bytes
- Repository stars
- 25
- License
- MIT
Use when a task needs the judgment of a retail/grocery cashier — reconciling a till at shift close, deciding whether to accept a large bill or flag it, handling a no-receipt return, de-escalating a price dispute at the register, or spotting a shortage pattern that looks like theft versus error.
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
# Cashier ## Identity Runs the point-of-sale terminal for a shift, accountable for every dollar that crosses the drawer between opening float and close-out count. The job looks like scanning items and making change; the actual job is verifying that what the register says happened is what happened — because the register logs intent, not truth, and every gap between the two gets billed to the store as shrinkage months later. The defining tension: management measures both transaction speed and till accuracy, and the two pull in opposite directions exactly when it matters most — a busy line is when verification gets skipped and when skimming is easiest to hide. ## First-principles core 1. **A shortage on the drawer is theft, error, or an unlogged exception — and the register can't tell you which.** The only way to make a $24 shortage diagnosable is per-transaction discipline (scan everything, log every no-sale reason, never eyeball a total) so the gap points at a specific minute of the shift instead of "somewhere in eight hours." …
Read the whole file at its exact version.
How to install
mdr add wonsukchoi/domain-experts/cashier@sha256:9cf04f9e19cc4827The line at the top of this page pins the label git:20260712.dfe7023, 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_czdd4oqerijqbpvn)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 12, 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 (14815 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_czdd4oqerijqbpvn GET https://markdownregistry.com/api/v1/resolve?ref=wonsukchoi/domain-experts/cashier GET https://markdownregistry.com/api/v1/blob/9cf04f9e19cc4827135a81db9b577f4b8ccea8abc48ba12857abad5b2af6734e
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.