Build Xcode project for iOS Simulator

Build the Xcode workspace or project under the current working directory for the iOS Simulator. Uses a generic simulator destination (no specific UDID), so no simulator needs to be booted.

How to build

The shared agent-skill-xcode.el lives in the sibling xcode-shared directory at skills/xcode-shared/agent-skill-xcode.el in the emacs-skills plugin. All four /xcode-* skills load it from there.

emacsclient --eval "(progn (load \"/path/to/skills/xcode-shared/agent-skill-xcode.el\" nil t) (agent-skill-xcode-build-simulator :project-dir \"$(pwd)\"))"

The function:

• Locates the first .xcworkspace (preferred) or .xcodeproj in :project-dir.
• Picks a scheme via xcodebuild -list -json: prefers the scheme matching the project basename, else the first non-test scheme.
• Runs xcodebuild build -destination 'generic/platform=iOS Simulator'.
• Returns "Build succeeded: ..." on success, or "Build FAILED: ...\n--- last 40 lines ---\n..." on failure.

Rules

• Pass the agent's current working directory as :project-dir via $(pwd). Do not assume a hard-coded path.
• Run via the Bash tool with a single emacsclient --eval invocation.
• Report the returned status string to the user verbatim on failure (truncated tail is already included).
• On success, a one-line confirmation is enough.
• If the user wants to also run the app, suggest /xcode-run-simulator.