# Executive Summary — InboxIntel Discovery Blueprint

**Ambition:** become one of the best **email search and management** experiences available
— fast, scalable, secure, intuitive — with **AI used only where it clearly beats
traditional approaches**, running **locally and privately**, and **never as a hard
dependency**.

## The opportunity (the wedge)
The market has split in two, and both halves leave a gap:
- **AI, but cloud** (Gmail/Gemini, Outlook/Copilot, Shortwave, Spark) — useful, but your
  mail is processed off-device.
- **Private, but little/no AI** (Proton, Thunderbird, Fastmail).

**No mainstream product owns "genuinely useful AI that runs on your own machine."**
InboxIntel can — and it already has the seams for it. Combined with three more openings —
**approachable power-search as the home screen**, **explainability** ("why this matched /
was categorised"), and **fast *and* friendly** (Superhuman is fast-but-intimidating; casual
apps are friendly-but-slow) — this is a defensible, differentiated position.

> **Positioning:** *Make search the fastest way to think about your inbox, with AI that runs
> on your own machine and always explains itself. Powerful for pros, simple for anyone.*

## Current state — verdict: extend, don't rewrite
A clean, secure, well-tested .NET 8 / React foundation with **real Postgres full-text
search** and **an AI provider abstraction already in place** (`NullAiProvider` /
`OllamaProvider` / `OpenAiProvider`). The gaps are exactly where the product wants to win:
relevance-ranked multi-mode search, a richer AI contract (embeddings/extraction),
conversation intelligence, and a modern approachable UX. **None require a rewrite.**

## Design direction (from the interview)
Notion/Arc-**professional**, "anyone can pick it up": **pointer-first & discoverable**
(palette/shortcuts as accelerators), **balanced density**, **dark-first** (genuine light
too), **subtle motion**, **green `#3ba31f`** accent, clean rounded line icons, **fully
responsive** desktop→mobile. The pivotal decision — *discoverable-first over keyboard-first*
— reframes search from "a syntax you learn" into "an inviting, assisted experience."

## Search & AI in a nutshell
- **Search:** a 4-layer engine — Structured → **Lexical+Ranking** (always on) → Semantic
  (pgvector) → AI-assisted (NL / ask-your-inbox / explanations) — with **hybrid RRF ranking**
  replacing today's date-only sort. Degrades gracefully with AI off.
- **AI:** extend the abstraction to embeddings + structured output behind a task facade with
  **config-driven model routing**; on the **RTX 3080 (10 GB)**, **Qwen2.5-7B** (warm) +
  **nomic-embed-text** (hot) do most jobs, vision on-demand. Traditional-first everywhere;
  every AI feature has a non-AI fallback.

## Roadmap shape
**v1.0** redesign + world-class *deterministic* search + AI foundation → **v1.1** assisted
search & productivity → **v1.2** semantic tier → **v2.0** ambitious AI (RAG, vision, graph)
→ **v3.0** platform (collaboration, rules, plugins, mobile). Sequenced so **deterministic
value ships before AI**, infrastructure is amortised, and **every release is complete with
AI disabled.**

## Key risks
Migration of a full redesign (**mitigated by strangler + `ui.v2` flag**), VRAM limits
(**7–8B sweet spot + load policy**), prompt injection (**AI advisory-only, never acts**), and
scope creep (**value/effort-sequenced roadmap**). See [11](11-risks-and-future.md).

## Recommendation
**Proceed to v1.0.0** — the redesign, ranked/assisted search, and AI foundation. It's the
biggest quality jump, it's low-risk and deterministic, and it stands entirely on its own
without AI. Then layer local, private, explainable AI in value order.

---
### Read the full blueprint
[01 Architecture](01-architecture-review.md) · [02 Competitors](02-competitor-analysis.md) ·
[03 Users](03-user-research.md) · [04 UX + Design System](04-ux-redesign-and-design-system.md) ·
[05 Search](05-search-redesign.md) · [06 AI Strategy](06-ai-strategy.md) ·
[07 AI Features](07-ai-feature-catalogue.md) · [08 Architecture](08-technical-architecture.md) ·
[09 Roadmap](09-roadmap.md) · [10 Git Plan](10-git-plan.md) ·
[11 Risks & Future](11-risks-and-future.md) · [Design Brief](00-design-brief.md)