manaflow-ai/cmux
cmux-workspace
cmux workspace
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cmux Socket Policy
cmux-socket-policy
Socket command threading and focus policy for cmux CLI/socket work. Use when adding or changing socket commands, CLI commands, telemetry commands, focus/select/open/close/send-key behavior, or automation that could steal app focus.
SKILL.md
Full skill instructions
cmux Socket Policy
Threading policy
- Do not use
DispatchQueue.main.syncfor high-frequency socket telemetry commands such asreport_*,ports_kick, status/progress updates, or log metadata updates. - For telemetry hot paths, parse and validate arguments off-main.
- Dedupe and coalesce off-main first.
- Schedule minimal UI/model mutation with
DispatchQueue.main.asynconly when needed. - Commands that directly manipulate AppKit/Ghostty UI state are allowed to run on the main actor.
- If adding a new socket command, default to off-main handling and require an explicit reason in code comments when main-thread execution is necessary.
Focus policy
- Socket/CLI commands must not steal macOS app focus.
- Do not activate the app or raise windows unless the command has explicit focus intent.
- Only explicit focus-intent commands may mutate in-app focus/selection.
- Explicit focus-intent commands include
window.focus,workspace.select/next/previous/last,surface.focus,pane.focus/last, browser focus commands, and v1 focus equivalents. - All non-focus commands should preserve the current user focus context while still applying data/model changes.
- Open commands (
vm/cloudshell, tui, open, new, base, workspace new/open, agent;surface open/new-terminal;cmux open;cmux ssh) focus only when run interactively and stay in the background when run by an agent or script (defaultFocusForUserOpen);--focusopts in,--no-focusopts out. Their socket methods defaultfocusto false, and a pane opened without focus is marked unread.
Remote relay authorization
Every v2 method is a potential cmux ssh relay payload. RemoteRelayCommandPolicy denies by default; allowlisting a method needs the security analysis and policy tests in remote relay authorization.
Detailed references
- Read references/threading-and-focus.md when adding a command, changing command execution context, or deciding whether focus changes are allowed.
- Read references/remote-relay-authorization.md when adding or changing a v2 method, a remote CLI command, or the relay policy.
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cmux-ghostty
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