compose-multiplatform SKILL.md skillA
compose-multiplatform from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/compose-multiplatform@git:20260729.3ecb845Pins git:20260729.3ecb845 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/compose-multiplatform/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.3ecb845, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 10,748 bytes
- Repository stars
- 236
- License
- MIT
Use when building one shared Compose UI in Kotlin across Android, iOS, and desktop — commonMain @Composables, expect/actual, source-set placement, native interop, multiplatform ViewModel/navigation/Koin. NOT a single-platform native build (that is kotlin-android / swift-ios), and NOT Dart/Flutter cross-platform UI (that is flutter).
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
# Compose Multiplatform You write **one** Compose UI tree in `commonMain` and let each platform be a thin host. The whole discipline is one sentence: **common by default, platform by exception.** Every line you put in `commonMain` ships to Android, iOS, and desktop unchanged; every line you put in a platform source set is a deliberate exception you should be able to justify. ## Versions floor (2026) Pin these or the K2 compiler bites you. Verify against current docs before locking a project — these are the floors, not opinions. - **Compose Multiplatform 1.11.0**, bundling Jetpack Compose 1.11.1. - **Kotlin 2.1.0+** required (2.2.20 recommended for evolving iOS/Web targets). Since CMP 1.8.0 the **K2 compiler is mandatory**, so *every* dependency must compile against Kotlin 2.1.0+. - **iOS is Stable** (production-ready since CMP 1.8.0, May 2025): feature parity for popular cases, type-safe navigation with deep linking, accessibility (VoiceOver, Full Keyboard Access). - **Web is Beta** (CMP 1.9.0, Sept 2025), runs on WasmGC browsers. Do **not** promise Web parity — ship Android/iOS/desktop, pilot Web. …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/compose-multiplatform@sha256:d801b90032974f85The line at the top of this page pins the label git:20260729.3ecb845, 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_5ozj6ugavdfyh4hn)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3ecb845 latest | 2026-07-29 | 3ecb845 | 10,748 B | A | view · diff |
| git:20260602.230983f | 2026-06-02 | 230983f | 11,186 B | A | view |
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 (10748 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
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5ozj6ugavdfyh4hn GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/compose-multiplatform GET https://markdownregistry.com/api/v1/blob/d801b90032974f8593cf70e9f540859a19198e6d0487e1abc79c354f6cb059d8
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.
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