Add Skills and Flywheels documentation

New welcome note covers:

Skills:
- /document-decision — Create well-formatted decision notes
- /create-handoff — Generate session summaries
- /create-hub — Create central reference notes
- /search-deep — Trigger comprehensive search

Flywheels explained:
- Usage Flywheel (notes that help get boosted)
- Documentation Flywheel (value → more documentation)
- Quality Flywheel (good notes → better results → better notes)
- Handoff Flywheel (compound productivity)

Includes kickstart guide and flywheel health metrics.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: sgx-labs

internal/setup/welcome/SAME-Skills-and-Flywheels.md

@@ -0,0 +1,228 @@
+---
+title: "SAME — Skills and Flywheels"
+tags: [same, reference, skills, automation]
+content_type: hub
+---
+
+# Skills and Flywheels
+
+Supercharge SAME with reusable skills and self-reinforcing flywheels.
+
+## What Are Skills?
+
+Skills are reusable prompts that automate common workflows. In Claude Code, they live in `.claude/skills/` and are invoked with slash commands.
+
+## Recommended SAME Skills
+
+### /document-decision
+
+Create a well-formatted decision note:
+
+```markdown
+# .claude/skills/document-decision.md
+
+Create a decision note with this structure:
+
+---
+title: "Decision: [Topic]"
+tags: [decision, <relevant-tags>]
+content_type: decision
+date: <today>
+---
+
+# Decision: [Topic]
+
+## Context
+What problem or question prompted this decision?
+
+## Decision
+What did we decide? Be specific.
+
+## Rationale
+Why this approach? What alternatives were considered?
+
+## Consequences
+What are the implications? Any follow-up needed?
+```
+
+### /create-handoff
+
+Generate a session summary:
+
+```markdown
+# .claude/skills/create-handoff.md
+
+Create a handoff note summarizing this session:
+
+---
+title: "Session Handoff - <date>"
+tags: [handoff, session]
+content_type: handoff
+date: <today>
+---
+
+# Session Handoff
+
+## What We Worked On
+- Bullet points of main activities
+
+## Decisions Made
+- Key decisions with brief rationale
+
+## Current State
+Where did we leave off?
+
+## Next Steps
+What should the next session pick up?
+
+## Open Questions
+Anything unresolved?
+```
+
+### /create-hub
+
+Create a hub note for a topic:
+
+```markdown
+# .claude/skills/create-hub.md
+
+Create a hub note that serves as a central reference:
+
+---
+title: "[Topic] Hub"
+tags: [hub, <topic>]
+content_type: hub
+---
+
+# [Topic]
+
+Central reference for [topic].
+
+## Overview
+Brief description of this area.
+
+## Key Decisions
+- [[Decision: ...]]
+
+## Resources
+- Links to relevant notes
+- External documentation
+
+## Current Status
+What's the state of this area?
+```
+
+### /search-deep
+
+Trigger a comprehensive search:
+
+```markdown
+# .claude/skills/search-deep.md
+
+Search the user's notes thoroughly:
+
+1. Search with the exact query (top_k=15)
+2. Try 2-3 alternate phrasings
+3. Search for related concepts
+4. Report what you found or didn't find
+
+If nothing found, offer to document the topic.
+```
+
+## The SAME Flywheels
+
+Flywheels are self-reinforcing loops. SAME has several:
+
+### 1. The Usage Flywheel
+
+```
+AI uses a note
+    ↓
+Note gets "access boost"
+    ↓
+Note ranks higher next time
+    ↓
+AI uses it more
+    ↓
+Better results over time
+```
+
+Notes that actually help get surfaced more. Notes that don't help fade away.
+
+### 2. The Documentation Flywheel
+
+```
+User documents decision
+    ↓
+AI references it in future
+    ↓
+User sees value ("it remembered!")
+    ↓
+User documents more
+    ↓
+Richer knowledge base
+```
+
+The more you document, the smarter your AI gets, which motivates more documentation.
+
+### 3. The Quality Flywheel
+
+```
+Well-structured note
+    ↓
+Better search matches
+    ↓
+AI produces better output
+    ↓
+User learns what works
+    ↓
+Writes better notes
+```
+
+Good notes teach you what format works, leading to better notes.
+
+### 4. The Handoff Flywheel
+
+```
+Session ends with handoff
+    ↓
+Next session starts with context
+    ↓
+Faster ramp-up
+    ↓
+More productive session
+    ↓
+Better handoff for next time
+```
+
+Handoffs compound — each one makes the next session more productive.
+
+## Kickstarting the Flywheels
+
+### Week 1: Foundation
+- Document your top 3 project decisions
+- Create one hub note for your main project
+- Let SAME generate handoffs automatically
+
+### Week 2: Build Momentum
+- Document decisions as you make them
+- Notice when SAME surfaces something useful
+- Add context when SAME misses something
+
+### Week 3+: Cruise
+- Flywheels are spinning
+- AI remembers your project
+- Documentation happens naturally
+
+## Measuring Flywheel Health
+
+```bash
+same status          # How many notes indexed?
+same log             # What's being surfaced?
+same budget          # Is surfaced context being used?
+```
+
+If surfaced context isn't being used, either:
+- Notes need better structure
+- Search profile needs tuning (`same profile use precise`)
+- Content isn't matching queries (try different terminology)