Add: windows mvp - transparent bugs not fixed

skills/m01-ownership/SKILL.md

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+---
+name: m01-ownership
+description: "CRITICAL: Use for ownership/borrow/lifetime issues. Triggers: E0382, E0597, E0506, E0507, E0515, E0716, E0106, value moved, borrowed value does not live long enough, cannot move out of, use of moved value, ownership, borrow, lifetime, 'a, 'static, move, clone, Copy, 所有权, 借用, 生命周期"
+user-invocable: false
+---
+
+# Ownership & Lifetimes
+
+> **Layer 1: Language Mechanics**
+
+## Core Question
+
+**Who should own this data, and for how long?**
+
+Before fixing ownership errors, understand the data's role:
+- Is it shared or exclusive?
+- Is it short-lived or long-lived?
+- Is it transformed or just read?
+
+---
+
+## Error → Design Question
+
+| Error | Don't Just Say | Ask Instead |
+|-------|----------------|-------------|
+| E0382 | "Clone it" | Who should own this data? |
+| E0597 | "Extend lifetime" | Is the scope boundary correct? |
+| E0506 | "End borrow first" | Should mutation happen elsewhere? |
+| E0507 | "Clone before move" | Why are we moving from a reference? |
+| E0515 | "Return owned" | Should caller own the data? |
+| E0716 | "Bind to variable" | Why is this temporary? |
+| E0106 | "Add 'a" | What is the actual lifetime relationship? |
+
+---
+
+## Thinking Prompt
+
+Before fixing an ownership error, ask:
+
+1. **What is this data's domain role?**
+   - Entity (unique identity) → owned
+   - Value Object (interchangeable) → clone/copy OK
+   - Temporary (computation result) → maybe restructure
+
+2. **Is the ownership design intentional?**
+   - By design → work within constraints
+   - Accidental → consider redesign
+
+3. **Fix symptom or redesign?**
+   - If Strike 3 (3rd attempt) → escalate to Layer 2
+
+---
+
+## Trace Up ↑
+
+When errors persist, trace to design layer:
+
+```
+E0382 (moved value)
+    ↑ Ask: What design choice led to this ownership pattern?
+    ↑ Check: m09-domain (is this Entity or Value Object?)
+    ↑ Check: domain-* (what constraints apply?)
+```
+
+| Persistent Error | Trace To | Question |
+|-----------------|----------|----------|
+| E0382 repeated | m02-resource | Should use Arc/Rc for sharing? |
+| E0597 repeated | m09-domain | Is scope boundary at right place? |
+| E0506/E0507 | m03-mutability | Should use interior mutability? |
+
+---
+
+## Trace Down ↓
+
+From design decisions to implementation:
+
+```
+"Data needs to be shared immutably"
+    ↓ Use: Arc<T> (multi-thread) or Rc<T> (single-thread)
+
+"Data needs exclusive ownership"
+    ↓ Use: move semantics, take ownership
+
+"Data is read-only view"
+    ↓ Use: &T (immutable borrow)
+```
+
+---
+
+## Quick Reference
+
+| Pattern | Ownership | Cost | Use When |
+|---------|-----------|------|----------|
+| Move | Transfer | Zero | Caller doesn't need data |
+| `&T` | Borrow | Zero | Read-only access |
+| `&mut T` | Exclusive borrow | Zero | Need to modify |
+| `clone()` | Duplicate | Alloc + copy | Actually need a copy |
+| `Rc<T>` | Shared (single) | Ref count | Single-thread sharing |
+| `Arc<T>` | Shared (multi) | Atomic ref count | Multi-thread sharing |
+| `Cow<T>` | Clone-on-write | Alloc if mutated | Might modify |
+
+## Error Code Reference
+
+| Error | Cause | Quick Fix |
+|-------|-------|-----------|
+| E0382 | Value moved | Clone, reference, or redesign ownership |
+| E0597 | Reference outlives owner | Extend owner scope or restructure |
+| E0506 | Assign while borrowed | End borrow before mutation |
+| E0507 | Move out of borrowed | Clone or use reference |
+| E0515 | Return local reference | Return owned value |
+| E0716 | Temporary dropped | Bind to variable |
+| E0106 | Missing lifetime | Add `'a` annotation |
+
+---
+
+## Anti-Patterns
+
+| Anti-Pattern | Why Bad | Better |
+|--------------|---------|--------|
+| `.clone()` everywhere | Hides design issues | Design ownership properly |
+| Fight borrow checker | Increases complexity | Work with the compiler |
+| `'static` for everything | Restricts flexibility | Use appropriate lifetimes |
+| Leak with `Box::leak` | Memory leak | Proper lifetime design |
+
+---
+
+## Related Skills
+
+| When | See |
+|------|-----|
+| Need smart pointers | m02-resource |
+| Need interior mutability | m03-mutability |
+| Data is domain entity | m09-domain |
+| Learning ownership concepts | m14-mental-model |