build-run-debug

name	build-run-debug
description	Build, run, and debug macOS apps with shell-first Xcode and Swift workflows. Use when launching apps or diagnosing build, startup, or runtime failures.

Build / Run / Debug

Quick Start

Use this skill to set up one project-local script/build_and_run.sh entrypoint, wire .codex/environments/environment.toml so the Codex app shows a Run button, then use that script as the default build/run path.

Prefer shell-first workflows:

• ./script/build_and_run.sh as the single kill + build + run entrypoint once it exists
• xcodebuild for Xcode workspaces or projects
• swift build plus raw executable launch inside that script for true SwiftPM command-line tools
• swift build plus project-local .app bundle staging and /usr/bin/open -n launch for SwiftPM AppKit/SwiftUI GUI apps
• optional script flags for lldb, log stream, telemetry verification, or post-launch process checks

Do not assume simulators, touch interaction, or mobile-specific tooling.

If an Xcode-aware MCP surface is already available and the user explicitly wants it, use it only where it fits. Keep that usage narrow and honest: prefer it for Xcode-oriented discovery, logging, or debugging support, and do not force simulator-specific workflows onto pure macOS tasks.

Workflow

1. Discover the project shape.

   • Check whether the workspace is already inside a git repo with git rev-parse --is-inside-work-tree.
   • If no git repo is present, run git init at the project/workspace root before building so Codex app git-backed features are available. Never run git init inside a nested subdirectory when the current workspace already belongs to a parent repo.