# Wrightstown Smart Home - Session Log 2026-02-09

**Session:** Initial Research and Planning
**Machine:** ACG-M-L5090

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## 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

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## 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 |

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## 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)

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## 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