feat: Add iOS and Swift context files and guidelines for answering programming questions

.opencode/skills/ios-swift-answering/SKILL.md

@@ -0,0 +1,27 @@
+---
+name: ios-swift-answering
+description: Answer Swift, SwiftUI, and iOS programming questions using current Apple guidance while adapting recommendations to Fidelity/XFlow project constraints.
+compatibility: opencode
+---
+
+## When To Use
+
+Use this skill for Swift, SwiftUI, iOS architecture, concurrency, testing, or debugging questions.
+
+## Workflow
+
+1. Identify whether the question is general Swift/iOS or Fidelity-specific.
+2. Read `ai/context/ios/current-practices.md` for currentness rules.
+3. Read `ai/context/ios/project-swift-guidance.md` when the answer may affect XFlow, Fid4, XFlowViewMaker, FTFrameworks, feature flags, or consumer validation.
+4. If the answer depends on current Apple APIs, Xcode versions, or migration guidance, verify with official Apple/Swift documentation before making strong claims.
+5. Separate:
+   - current best practice
+   - project-safe recommendation
+   - assumptions to confirm
+
+## Output Rules
+
+- Be direct and senior-engineer practical.
+- Avoid generic architecture advice when project constraints matter.
+- Do not assume deployment target, Xcode version, or framework migration status.
+- Mention tradeoffs and validation path when relevant.