What I'm NOT doing

Negative space matters more than the positive list when the work is wide. Pinning this somewhere I'll re-read.

What I'm not building

A vector store. We use pgvector because Postgres was already in the stack. We are not in the business of competing with Pinecone / Weaviate / Chroma. If pgvector ever becomes the bottleneck, we'll swap. We won't try to be the vector DB.
A knowledge graph DB. Same logic. concept_index + concept_relations live in Postgres tables. We never sell anyone on "a graph database for AI memory" — that's not the product.
A fine-tuned model. Every model we use is off-the-shelf (Anthropic Haiku, OpenAI text-embedding-3-small, GPT-4o-mini for capture, Claude Sonnet for analysis). Custom training is not on the roadmap for v6 or v7.
An AI provider. Obvious but worth stating. We are not building inference infra.
A workspace. No team channels, no rich-text collaboration, no comments threads. Hub-shaped, URL-shaped, single-author by default.
A comments system. A lot of users will ask. The answer is no — comments turn a memory layer into a social tool, and the two have different incentive shapes.

The Notion shape. Blocks, databases, embedded widgets, real-time collab. Notion does that better than we ever could; we're not in that lane.
The Roam shape. Block-level references, bi-directional links as first-class, daily notes as the entry point. The audience is too narrow and the model is too far from URL-as-memory.
The Obsidian shape. Local file vault, plugin ecosystem, vault-as-product. We're URL-shaped; the Obsidian shape requires we run on disk.

Conversion rate. Not at this stage. The product has to be the story before the funnel matters.
MAU. The wrong vanity metric for a memory tool — single-user retention over weeks is more meaningful than concurrent monthly users.
Viral coefficient. I care that the dogfood loop works; I don't care about K-factor math.

Security review. Even at this stage, a bug in shared-doc permissions is a launch-killer. Every PR touching auth or sharing gets a security pass.
Founder dogfood. I have to live in mdfy.app full time. If I drift to using Notion for my own notes, the product gets worse.
The Show HN draft. It gets rewritten every two weeks until launch.