Xcode, agents, and you

Summary

• Xcode 27 enhances developer productivity with powerful coding agents for exploration, planning, building, and refining features.

• Agents leverage full project context plus Apple Document Search for deep understanding and up-to-date API info.

• Plan mode aligns feature architecture before coding; queued messages enable interactive, iterative design.

• Built-in build, test, and preview tools validate code continuously within the agent workflow.

• Orchestration automates complex tasks like localization and accessibility through coordinated sub-agents.

Presenters

• Maxwell Oury, Xcode Intelligence Experience

• Devin Green, Xcode Intelligence Foundations

Exploration and Understanding

• Agents access full project context: source code, build settings, open files, and selections.

• Start a conversation (Option + Shift + click on toolbar item) for exploration without leaving your coding environment.

• Use agents to:

  • Summarize data models and view hierarchy.

  • Generate detailed walkthroughs of architecture, data flow, and key files with clickable references.

• Create persistent architecture documents inside the project for team reference; helps onboard new team members faster.

• Agents combine code reading with Apple Document Search, providing current API documentation and examples.

• Plan Mode (/ command) allows outlining feature architecture before writing code.

• Write high-level overviews, device-specific design considerations, and preview requests.

• Use queued messages to add clarifications or requirements while agents process prior instructions.

• Interactive dialogue creates a tight feedback loop, resulting in a robust, well-aligned plan.

• Once approved, agents execute the plan, delivering code changes as artifacts with diffs visible inline.

Building, Previewing, and Validating

• Agents:

  • Build incrementally and report build errors directly.

  • Update architecture documents dynamically as code evolves.

  • Render SwiftUI previews with real or artificial data to visually verify results.

  • Run unit tests or generate new ones, reporting pass/fail status.

• This integrated validation ensures correctness without manual context-switching.

UI Refinement with Visual Feedback

• Example: Adding Swift Charts to visualize workout data with custom styles and animations.

• Iterations include:

  • Sketch-based design input (via image attachments).

  • Inline annotations specifying exact code lines to tweak colors, animations, etc.

  • Preview updates check visual accuracy continuously.

Orchestration of Complex Tasks

• Orchestration involves defining high-level goals like localization and accessibility.

• Parallel workflows run simultaneously, e.g., translating strings into Filipino + adding VoiceOver labels.

• Agents manage the entire workflow end to end, from initial request to completion.

• Results include fully localized UI elements and accessible components verified with VoiceOver.

• Users can monitor progress and remain in control throughout.

Summary of Workflow Enhancements

Practical Developer Tips

• Use agents to quickly onboard new team members via generated documentation.

• Leverage plan mode before coding to save time fixing architectural issues later.

• Employ queued messages for iterative discussion without blocking your agent’s current task.

• Regularly check artifacts (code diffs, previews, test results) to verify agent outputs.

• Use orchestration to automate tedious but important processes like app localization and accessibility improvements.