[santhoshvai]

💡 Overview

The dogfood iOS build fails on CI since #2466: FoldRegionObserver.swift uses the iOS 27.1 hinge APIs (UIHinge, UIHingeInteraction), which the iOS 26.1 SDK in Xcode 26.1.1 does not have. Build the app on the xcode-27 runner with Xcode 27.1, the toolchain the app is developed with. The deploy job only uploads the built ipa and is unchanged.

📝 Implementation notes

Two lines in react-native-workflow.yml, build_ios job only. The xcode-27 image is a GitHub preview label, so queue times may vary.

Runner: https://github.com/actions/runner-images/blob/main/images/macos/xcode-27-arm64-Readme.md

🎫 Ticket: https://linear.app/stream/issue/RN-429

Summary by CodeRabbit

• Chores
  • Updated the iOS build environment to use Xcode 27.1. This affects the tooling used to build the app and does not change its features or behavior for end-users.

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Navigate logical layers of code changes, visualize relationships, and explore their blast radius.

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Advanced

Run ID: 3a7f2e04-5837-4212-878b-6119348006bb

📥 Commits

Reviewing files that changed from the base of the PR and between e8e1d68 and a4e8519.

📒 Files selected for processing (1)

• .github/workflows/react-native-workflow.yml

Included review availability: This review used your included allowance. Your plan provides up to 2 included reviews per hour; 1 remain after this review.

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📝 Walkthrough

Walkthrough

The build_ios job now runs on the xcode-27 runner and selects Xcode 27.1 instead of using macos-15 and Xcode 26.1.1.

Changes

iOS CI build

Layer / File(s)	Summary
iOS runner and Xcode selection .github/workflows/react-native-workflow.yml	The build_ios job switches to the xcode-27 runner and selects Xcode 27.1.

Priority: ➖ Normal

Estimated code review effort: 2 (Simple) | ~5 minutes

Change: Bug fix

Suggested reviewers: oliverlaz

Merge Risk: ⚪ Minimal · up to a4e85

The iOS build uses a supported preview runner with Xcode 27.1. Queue times may vary, but no concrete build or deployment blocker is established.

Architecture Summary

Architecture risk: 🔵 Low · up to a4e85

The changed surface does not map to a changed system, dependency edge, entrypoint, or external dependency.

Changed systems: None identified.

Architecture concerns
No architecture-level concerns identified.

Review details

Before / after behavior

• observed — Modified behavior in .github/workflows/react-native-workflow.yml: build_ios switches from the macos-15 runner with Xcode 26.1.1 to the xcode-27 runner with Xcode 27.1.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely states the main change: updating the iOS CI build to use Xcode 27.1.
Description check	✅ Passed	The description includes the overview, implementation notes, ticket, runner details, cause of the failure, and scope of the change. It omits the template's Docs section, but the description is otherwi…

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

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Bundle size

Built package output. Sizes in KB; delta vs main@e8e1d68.

No significant package size increase vs main.