sync: Add Wrightstown Solar and Smart Home projects

New projects from 2026-02-09 research session:

Wrightstown Solar:
- DIY 48V LiFePO4 battery storage (EVE C40 cells)
- Victron MultiPlus II whole-house UPS design
- BMS comparison (Victron CAN bus compatible)
- EV salvage analysis (new cells won)
- Full parts list and budget

Wrightstown Smart Home:
- Home Assistant Yellow setup (local voice, no cloud)
- Local LLM server build guide (Ollama + RTX 4090)
- Hybrid LLM bridge (LiteLLM + Claude API + Grok API)
- Network security (VLAN architecture, PII sanitization)

Machine: ACG-M-L5090
Timestamp: 2026-02-09

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

projects/wrightstown-smarthome/session-logs/2026-02-09-session.md

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+# Wrightstown Smart Home - Session Log 2026-02-09
+
+**Session:** Initial Research and Planning
+**Machine:** ACG-M-L5090
+
+---
+
+## Work Completed
+
+### 1. Project Scope Defined
+- Privacy-first smart home (no Google/Alexa)
+- Home Assistant Yellow (already owned, not set up)
+- Local LLM server for private queries
+- Hybrid bridge: local + Claude API + Grok API
+- Separate project from Wrightstown Solar, with planned crossover
+
+### 2. Home Assistant Yellow Research
+- Yellow still receives updates despite production ending Oct 2025
+- Needs CM4 or CM5 compute module (not included)
+- Built-in Zigbee 3.0 radio, M.2 NVMe slot
+- Local voice: Wyoming + Whisper + Piper (all local, no cloud)
+- Victron integration planned via Modbus TCP (future crossover)
+
+### 3. Local LLM Server Research
+- Recommended build: RTX 4090 24GB ($1,940-2,240)
+- Software: Ollama (primary) + Open WebUI (interface)
+- Models: Qwen 2.5 7B (fast voice), Llama 3.1 70B Q4 (reasoning)
+- Alternative builds researched: budget ($580), flagship ($4,000+), Mac Mini M4
+
+### 4. Hybrid Bridge Design
+- LiteLLM proxy as unified routing layer
+- Routes: local (Ollama) / Claude API (reasoning) / Grok API (search)
+- 80/15/5 split estimated at ~$5/month cloud costs
+- Manual routing first, keyword-based later, semantic routing eventual
+- Integration with HA via Extended OpenAI Conversation
+
+### 5. Network Security Design
+- 4-VLAN architecture: Trusted / Infrastructure / IoT / Guest
+- IoT isolation (devices can't reach trusted network)
+- PII sanitization pipeline for cloud-bound queries
+- Private data (cameras, sensors, presence) stays local only
+- Remote access via Tailscale or WireGuard
+
+---
+
+## Decisions Made
+
+| Decision | Chosen | Rationale |
+|---|---|---|
+| Smart home platform | Home Assistant | Open source, local-first, 2000+ integrations |
+| Hardware | HA Yellow (owned) | Built-in Zigbee, already purchased |
+| Voice assistant | Wyoming/Whisper/Piper | Fully local, no cloud dependency |
+| LLM server GPU | RTX 4090 24GB (recommended) | Best price/performance for 70B models |
+| LLM software | Ollama | Simplest, OpenAI-compatible API |
+| Hybrid routing | LiteLLM | Unified API, cost tracking, fallbacks |
+| Cloud: reasoning | Claude API (Anthropic) | Best reasoning quality |
+| Cloud: search | Grok API (xAI) | Internet access, 2M context |
+| Network | VLAN segmentation | IoT isolation, privacy |
+| Separate from solar | Yes | Different timelines, crossover later |
+
+---
+
+## Files Created
+
+- `projects/wrightstown-smarthome/PROJECT_INDEX.md`
+- `projects/wrightstown-smarthome/documentation/ha-yellow-setup.md`
+- `projects/wrightstown-smarthome/documentation/llm-server-build.md`
+- `projects/wrightstown-smarthome/documentation/hybrid-bridge.md`
+- `projects/wrightstown-smarthome/documentation/network-security.md`
+- `projects/wrightstown-smarthome/session-logs/2026-02-09-session.md` (this file)
+
+---
+
+## Next Steps
+
+- [ ] Check if CM4/CM5 module is owned or needs purchasing
+- [ ] Set up HA Yellow (basic install, Zigbee, first automations)
+- [ ] Research specific Zigbee devices to purchase
+- [ ] Decide on LLM server GPU budget (3060 budget vs 4090 sweet spot)
+- [ ] Purchase LLM server hardware
+- [ ] Decide on VLAN hardware (TP-Link Omada vs Ubiquiti UniFi)
+- [ ] Set up Ollama + Open WebUI
+- [ ] Create Anthropic API account + Grok API account
+- [ ] Configure LiteLLM proxy
+- [ ] Integrate with HA via Extended OpenAI Conversation