Xcode Build Fixer

Use this skill to implement approved build optimization changes and verify them with a benchmark.

Core Rules

• Only apply changes that have explicit developer approval.
• Apply one logical fix at a time so changes are reviewable and reversible.
• Re-benchmark after applying changes to verify improvement.
• Report exactly what changed, which files were touched, and the measured delta.
• If a change produces no improvement or causes a regression, flag it immediately.

Inputs

The fixer expects one of:

• An approved optimization plan at .build-benchmark/optimization-plan.md with checked approval boxes.
• An explicit developer instruction describing the fix to apply (e.g., "set DEBUG_INFORMATION_FORMAT to dwarf for Debug").