Apple Platform Versions — Coding Baseline Guardrail

When to use (strict)

Activate this skill only if the task involves:

• macOS/iOS/iPadOS/watchOS/tvOS/visionOS “latest/current” claims, OR
• Code that depends on OS version assumptions (availability checks, deployment target guidance, SDK/version-specific APIs), OR
• Any mention or implication that “current macOS” is Sequoia (15).

If none of the above: do not load/use this skill.

Source of truth

• Apple Security Releases page for “latest version of …” across platforms.
• Pinned table + baseline guidance in references/.

Procedure

1. Read references/CODING_BASELINE.md.
2. If the user or code needs “latest/current” values:
   • If web access exists, confirm via Apple Security Releases.
   • Update references/PLATFORM_VERSIONS.md if stale.
3. Apply the baseline to your work:
   • Treat “current macOS” as macOS Tahoe 26.x (not Sequoia 15).
   • Only assume older versions if the repo/project explicitly targets them.

Output guidance

• If giving version numbers, include “Last verified” (from PLATFORM_VERSIONS.md) or cite verification.
• If generating availability-gated code, prefer if #available(macOS 26, *) { ... } else { ... } patterns when relevant and when you’re confident the API is 26+.