[ezra] Deep Dive scaffold for #830: DEEPSDIVE_ARCHITECTURE.md

docs/DEEPSDIVE_ARCHITECTURE.md

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+# Deep Dive — Sovereign NotebookLM Architecture
+
+> Parent: [#830](http://143.198.27.163:3000/Timmy_Foundation/the-nexus/issues/830)  
+> Status: Architecture committed, awaiting infrastructure decisions  
+> Owner: @ezra  
+> Created: 2026-04-05
+
+## Vision
+
+**Deep Dive** is a fully automated daily intelligence briefing system that eliminates the 20+ minute manual research overhead. It produces a personalized AI-generated podcast (or text briefing) with **zero manual input**.
+
+Unlike NotebookLM which requires manual source curation, Deep Dive operates autonomously.
+
+## Architecture Overview
+
+```
+┌──────────────────────────────────────────────────────────────────────────────┐
+│                    D E E P   D I V E   P I P E L I N E                       │
+├──────────────────────────────────────────────────────────────────────────────┤
+│  ┌───────────┐   ┌───────────┐   ┌───────────┐   ┌───────────┐   ┌────────┐ │
+│  │ AGGREGATE │──▶│  FILTER   │──▶│ SYNTHESIZE│──▶│   AUDIO   │──▶│DELIVER │ │
+│  │ arXiv RSS │   │ Keywords  │   │ LLM brief │   │ TTS voice │   │Telegram│ │
+│  └───────────┘   └───────────┘   └───────────┘   └───────────┘   └────────┘ │
+└──────────────────────────────────────────────────────────────────────────────┘
+```
+
+## Phase Specifications
+
+### Phase 1: Aggregate
+Fetches from arXiv RSS (cs.AI, cs.CL, cs.LG), lab blogs, newsletters.
+
+**Output**: `List[RawItem]`  
+**Implementation**: `bin/deepdive_aggregator.py`
+
+### Phase 2: Filter
+Ranks items by keyword relevance to Hermes/Timmy work.
+
+**Scoring Algorithm (MVP)**:
+```python
+keywords = ["agent", "llm", "tool use", "rlhf", "alignment"]
+score = sum(1 for kw in keywords if kw in content)
+```
+
+### Phase 3: Synthesize
+LLM generates structured briefing: HEADLINES, DEEP DIVES, BOTTOM LINE.
+
+### Phase 4: Audio
+TTS converts briefing to MP3 (10-15 min).
+
+**Decision needed**: Local (Piper/coqui) vs API (ElevenLabs/OpenAI)
+
+### Phase 5: Deliver
+Telegram voice message delivered at scheduled time (default 6 AM).
+
+## Implementation Path
+
+### MVP (2 hours, Phases 1+5)
+arXiv RSS → keyword filter → text briefing → Telegram text at 6 AM
+
+### V1 (1 week, Phases 1-3+5)
+Add LLM synthesis, more sources
+
+### V2 (2 weeks, Full)
+Add TTS audio, embedding-based filtering
+
+## Integration Points
+
+| System | Point | Status |
+|--------|-------|--------|
+| Hermes | `/deepdive` command | Pending |
+| timmy-config | `cron/jobs.json` entry | Ready |
+| Telegram | Voice delivery | Existing |
+| TTS Service | Local vs API | **NEEDS DECISION** |
+
+## Files
+
+- `docs/DEEPSDIVE_ARCHITECTURE.md` — This document
+- `bin/deepdive_aggregator.py` — Phase 1 source adapters
+- `bin/deepdive_orchestrator.py` — Pipeline controller
+
+## Blockers
+
+| # | Item | Status |
+|---|------|--------|
+| 1 | TTS Service decision | **NEEDS DECISION** |
+| 2 | `/deepdive` command registration | Pending |
+
+**Ezra, Architect** — 2026-04-05