duo-start SKILL.md skillA
duo-start from kimeur/duology is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kimeur/duology/duo-start@git:20261018.dfcd3c5Pins git:20261018.dfcd3c5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kimeur/duology
- Path
plugins/duology/skills/duo-start/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261018.dfcd3c5, committed Oct 18, 2026
- Size
- 18,009 bytes
- Repository stars
- 13
- License
- MIT
Entry point for iPhone Duo, Apple's foldable with an outer display, an inner display and a fold; use it first when someone asks to get an app ready for iPhone Duo, make it work on the foldable or survive fold and unfold, or doesn't know which Duology skill to load. It detects SwiftUI or UIKit, new or existing app, the Xcode and iOS SDK the app builds with (iOS 26, 27 or 27.1 behaviour on Duo), the deployment target and the UIKit scene life cycle, runs a five-minute first pass…
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
# duo-start Use this skill before any other Duology skill. It answers three questions about the app, runs a short first pass, and tells you which skill to load next. Don't fix anything until the first pass is reported. Labels: *measured* means we ran it on the iPhone Duo simulator (iOS 27.1) on 16 or 17 Oct 2026. *Unverified* means we could not confirm it. Everything else comes from Apple's pages, linked inline. Full list: [reference/sources.md](https://github.com/Kimeur/duology/blob/main/reference/sources.md). ## Rules 1. Build with Xcode 27.1 through `DEVELOPER_DIR=/Applications/Xcode-27.1.app/Contents/Developer`. Never run `sudo` or `xcode-select -s`. Don't change the Mac's default Xcode. 2. Detect first, then route. Don't guess the stack from the README. 3. Never pick a layout by device model, `userInterfaceIdiom`, orientation or screen size. Use size classes and the space the view has ([Apple's prepare page](https://developer.apple.com/iphone-duo/prepare/)). …
Read the whole file at its exact version.
How to install
mdr add kimeur/duology/duo-start@sha256:f68d250ee05ff5edThe line at the top of this page pins the label git:20261018.dfcd3c5, 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_bfofxwqmxj5iqn4j)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Oct 18, 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 (18009 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
kimeur/duology · 13 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_bfofxwqmxj5iqn4j GET https://markdownregistry.com/api/v1/resolve?ref=kimeur/duology/duo-start GET https://markdownregistry.com/api/v1/blob/f68d250ee05ff5ed064833191ec21a74699f42b5384b9dee853ba20a4741eaaa
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.