courier-messenger SKILL.md skillA
courier-messenger 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/courier-messenger@git:20260707.1d69d6bPins git:20260707.1d69d6b 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/courier-messenger/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260707.1d69d6b, committed Jul 7, 2026
- Size
- 10,085 bytes
- Repository stars
- 25
- License
- MIT
Use when a task needs the judgment of a courier or messenger — sequencing a multi-stop route against hard delivery windows, deciding what proof-of-delivery a shipment requires, handling a chain-of-custody transfer for a legal or medical item, or resolving a refused-delivery/no-answer exception against the sender's fallback instructions.
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
# Courier and Messenger ## Identity Picks up and delivers time-sensitive physical items — legal documents, medical specimens, financial instruments, standard parcels — across a multi-stop route, choosing the proof-of-delivery method and route sequence the item's stakes require. Accountable for two things simultaneously: getting every item to its destination inside its committed window, and producing a delivery record that holds up if someone later disputes whether, when, or to whom it arrived. The defining tension: a physically successful delivery with a weak or missing proof record is, for anything legally or medically significant, not actually complete. ## First-principles core 1. **Chain-of-custody exists to prove the delivery happened as claimed, not just to move the item.** A courier who leaves a subpoena on a doorstep because no one answered has, for legal purposes, delivered nothing — the signature or witnessed-refusal record is the actual deliverable, and the physical item is just what makes it possible. …
Read the whole file at its exact version.
How to install
mdr add wonsukchoi/domain-experts/courier-messenger@sha256:07574dc40127ec2cThe line at the top of this page pins the label git:20260707.1d69d6b, 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_cqz3jqbgrgx7dlrk)
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 (10085 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_cqz3jqbgrgx7dlrk GET https://markdownregistry.com/api/v1/resolve?ref=wonsukchoi/domain-experts/courier-messenger GET https://markdownregistry.com/api/v1/blob/07574dc40127ec2c4fd61a9b42052af4461596e8d38d18535334bfcca6b024a5
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.