# Show HN: Domvault – self-hostable second brain with consent-based note sharing > Source: > Published: 2026-06-20 22:50:24+00:00 A Markdown-native knowledge engine (Obsidian + Claude) with a repeatable ingestion pipeline, a self-synthesis loop that generates new connections while you sleep, and an opt-inpublishing layer that lets brains share knowledge into a shared galaxy —Constellation. Domvault is the *engine*, not the *content*. You bring your own notes; the repo ships the structure, the workflows, the scripts, and the agent instructions that make a plain folder of Markdown behave like a living, self-improving graph. Most "second brain" templates are just empty folders. Domvault adds three things on top: **An agent contract**(`CLAUDE.md` ) — so Claude (Code, web, or Cowork) knows your conventions, origin-tracking scheme, and the exact repeatable workflows for ingesting screenshots, chats, and research.**A self-synthesis loop**— a scheduled job that generates cheap "sparks" (half-ideas linking two notes) and promotes the best into full "neuron" synthesis notes. Your graph compounds without you touching it.**Constellation (opt-in)**— you explicitly choose which notes/frameworks to publish. Published nodes form a shared,*credited*knowledge graph that others can browse and pull. This is the consensual substrate for a future marketplace — never a backdoor into anyone's private vault. ``` 🌌 Universe → the whole Constellation network (all public knowledge) ✨ Galaxy → a topic cluster or an org (e.g. "AI Engineering", "Acme Inc") ☀️ Solar system → one person's brain (their published nodes only) 🪐 Planet → a single published note / framework 🌙 Moon → a version or fork of a note ``` Everything inside a solar system is **owned and gated by its owner**. A planet only appears in the Universe if its owner published it. Pulling someone's planet into your own brain creates a *linked copy* that keeps attribution back to the origin star. That's the whole trust model: nothing moves without consent, and credit travels with the node. | Path | What it is | |---|---| `template/` | `plugin/` `registry/` **spec**+ manifest schema for Constellation.`constellation/` `frameworks/` **Publish Rubric**— example shareable content.`docs/` `scripts/` ``` # 1. clone git clone https://github.com//domvault.git && cd domvault # 2. scaffold a brand-new brain wherever you want it ./plugin/install.sh ~/my-brain # 3. open ~/my-brain in Obsidian, point Claude at it, start capturing ``` Full walkthrough: [ docs/03-getting-started.md](/dys5315/domvault/blob/main/docs/03-getting-started.md). Domvault **never** phones home. The base engine has no network calls. Constellation publishing is: **Opt-in per note**— nothing is shared unless you run`publish` on it.**Explicit**— you see a diff of exactly what leaves your machine.** Attributed**— your name/handle travels with every published node.** Revocable**— unpublishing removes the planet from the Universe. There is no telemetry, no silent sync, no analytics on your private notes. If you ever find code that violates this, it's a bug — open an issue. Source-available under ** PolyForm Noncommercial 1.0.0**: use it, study it, modify it, share it freely for any non-commercial purpose — but you may **not** sell it or build a commercial product on it without permission, and you must keep the attribution. The author retains all commercial rights. See [for plain-English details.](/dys5315/domvault/blob/main/docs/06-ip-and-licensing.md) `docs/06-ip-and-licensing.md` Required Notice: Copyright (c) 2026 Dom Sadarangani (Domvault / Constellation)