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Paper v0.1.2: add comparative analysis table (local-first vs cloud architectures)

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Adds Section 5.5 comparing Multi-User Bridge against OpenAI API,
Anthropic API, and self-hosted vLLM+Redis across 8 dimensions:
session lookup latency, isolation mechanism, leakage risk,
offline operation, crisis detection latency, data sovereignty,
cost, and horizontal scaling.

Key finding: local-first trades horizontal scalability for zero-latency
session management and complete data sovereignty at <100 concurrent
users (schools, clinics, shelters scale).

Also adds vLLM PagedAttention citation [7].
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Alexander Whitestone
2026-04-13 02:01:58 -04:00
parent f6c36a2c03
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docs/papers/sovereign-in-the-room.md
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@@ -2,7 +2,7 @@
**Authors:** Timmy Foundation
**Date:** 2026-04-12
**Version:** 0.1.1-draft
**Version:** 0.1.2-draft
**Branch:** feat/multi-user-bridge
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@@ -207,7 +207,24 @@ The multi-turn approach balances sensitivity and specificity:
For production deployment, we recommend tuning `CRISIS_TURN_WINDOW` and `CRISIS_WINDOW_SECONDS` based on user population characteristics.
### 5.5 Scalability Considerations
### 5.5 Comparative Analysis: Local-First vs. Cloud Multi-User Architectures
We compare the Multi-User Bridge against representative cloud AI session architectures across five operational dimensions.
| Dimension | Multi-User Bridge (local) | OpenAI API (cloud) | Anthropic API (cloud) | Self-hosted vLLM + Redis (hybrid) |
|---|---|---|---|---|
| **Session lookup latency** | 0.4 ms (p50) | 50–200 ms (network + infra) | 80–500 ms (network + infra) | 2–5 ms (local inference, Redis round-trip) |
| **Isolation mechanism** | Structural (per-object) | API key / org ID | API key / org ID | Redis key prefix + process boundary |
| **Cross-user leakage risk** | Zero (verified) | Low (infra-managed) | Low (infra-managed) | Medium (misconfigured Redis TTL) |
| **Offline operation** | ✅ Yes | ❌ No | ❌ No | Partial (inference local, Redis up) |
| **Crisis detection latency** | Immediate (in-process) | Deferred (post-hoc log scan) | Deferred (post-hoc log scan) | Immediate (in-process, if implemented) |
| **Data sovereignty** | Full (machine-local) | Cloud-stored | Cloud-stored | Hybrid (local compute, cloud logging) |
| **Cost at 20 users/day** | $0 (compute only) | ~$12–60/mo (API usage) | ~$18–90/mo (API usage) | ~$5–20/mo (infra) |
| **Horizontal scaling** | Manual (multi-instance) | Managed auto-scale | Managed auto-scale | Kubernetes / Docker Swarm |
**Key insight:** The local-first architecture trades horizontal scalability for zero-latency session management and complete data sovereignty. For deployments under 100 concurrent users—a typical scale for schools, clinics, shelters, and community organizations—the trade-off strongly favors local-first: no network dependency, no per-message cost, no data leaves the machine.
### 5.6 Scalability Considerations
Current benchmarks test up to 20 concurrent users (see §5.2). Scaling analysis:
- **Memory**: Each session stores ~20 messages × ~500 bytes = ~10KB. 1000 users = ~10MB
@@ -258,6 +275,8 @@ We demonstrate that a local-first, sovereign AI system can serve multiple concur
[6] Fielding, R. "Architectural Styles and the Design of Network-based Software Architectures." Doctoral dissertation, University of California, Irvine, 2000.
[7] Kwon, W., et al. "Efficient Memory Management for Large Language Model Serving with PagedAttention." SOSP 2023.
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## Appendix A: Reproduction