macos-app-multi-instances SKILL.md skillA
macos-app-multi-instances from soulmachine/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add soulmachine/skills/macos-app-multi-instances@git:20261026.f510036Pins git:20261026.f510036 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- soulmachine/skills
- Path
macos-app-multi-instances/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261026.f510036, committed Oct 26, 2026
- Size
- 3,655 bytes
- Repository stars
- 3
- License
- MIT
Run several simultaneous instances of one macOS app (e.g. two or three accounts logged into WeChat at once) by duplicating and re-signing its .app bundle. Use when an app refuses to open a second window and just refocuses the running one, when `open -n -a <App>` launches no new process, or when a second independent login session for the same app is needed without a second macOS user account or VM.
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
# Run several instances of a macOS app Duplicate and re-sign a macOS app bundle so each copy runs as a separate process the OS treats as a different app: its own sandbox container, its own login session, running alongside the original. Verified on WeChat 4.1.15 (Tencent, App Store, sandboxed): two accounts logged in at once, each in its own container, on 2026-10-25. ## Facts every step rests on - **`open -n -a` is not the fix.** It forces a new *launch request*, but an app with its own single-instance IPC check (most chat/IM apps) just detects the sibling and refocuses it — no new process shows up in `pgrep`. - **The container follows the bundle ID, not the code signature.** A sandboxed app's data lives at `~/Library/Containers/<CFBundleIdentifier>/`. Change the identifier in a copy and macOS hands it a fresh, empty container at launch. - **A plain ad-hoc re-sign drops the sandbox.** `codesign --force --deep --sign -` keeps no entitlements, so the copy runs unsandboxed. WeChat still builds its data path under `~/Library/Containers/<id>/`, but other apps may not. …
Read the whole file at its exact version.
How to install
mdr add soulmachine/skills/macos-app-multi-instances@sha256:e28d5e6e5e36c555The line at the top of this page pins the label git:20261026.f510036, 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_o2anbi2yqksrw2sa)
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Versions
The registry has recorded 1 version of this file, committed on Oct 26, 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 (3655 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
soulmachine/skills · 3 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_o2anbi2yqksrw2sa GET https://markdownregistry.com/api/v1/resolve?ref=soulmachine/skills/macos-app-multi-instances GET https://markdownregistry.com/api/v1/blob/e28d5e6e5e36c555cac4d0258970fcb4f9f838c2a1329bdd8854d346bd2857c3
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.