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Your AI agent can handle the full build-run-debug cycle. It builds your app, launches it on the simulator, streams runtime logs, and reacts to errors. If the build fails, it reads the compiler errors and fixes them. If the app crashes, it traces the issue in the logs. No more switching between your editor and terminal to copy error messages.
Looking for simulator management, runtimes, Swift packages, or project setup? See Infrastructure with AI.

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What you can ask

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Build and fix errors

The agent builds the project, parses any compiler errors from the output, opens the relevant source files, and applies fixes. It rebuilds to confirm the fix worked. If there are multiple errors, it works through them one at a time.

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Run the app and monitor for errors

The agent launches the app on the simulator and streams runtime logs. It watches for error-level messages, exceptions, unexpected state changes, and crash reports. If something goes wrong, it traces the issue back to the source and fixes the code.

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Run on a specific simulator

The agent resolves the simulator by name, boots it if needed, builds, and launches the app. You can target any simulator that’s installed on your system.
Same thing with a different device. The agent handles simulator resolution automatically.

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Run on a physical device

The agent detects your connected device, builds for it, and launches the app. This requires your provisioning profiles to be set up.

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Investigate and fix a runtime issue

The agent launches the app with log streaming, navigates to the screen using UI automation, reads the logs for errors or missing data, and traces the issue to its source. Whether it’s a missing API call, nil data, or a layout constraint error, it fixes the code and re-runs to verify the screen loads correctly.

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Build for release

The agent runs a release build with optimizations enabled. Useful for checking that your code compiles correctly with optimizations (some issues only appear in release builds).

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Clean and rebuild

The agent cleans all build artifacts and derived data, then performs a fresh build. This solves stale cache issues and incremental build problems.

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Tips for better results

Mention the specific error if you have one. Instead of “my app doesn’t build”, try “I’m getting a ‘cannot find type NetworkManager’ error in LoginService.swift”. The agent can jump straight to the fix.
Ask for logs when debugging runtime issues. Adding “check the logs” tells the agent to stream runtime output, which is often the fastest way to diagnose crashes and unexpected behavior.
Let the agent iterate. “Build and keep fixing until it compiles” is a perfectly valid prompt. The agent will loop through errors, fixing each one and rebuilding until the build succeeds.