Vellis Engine · first open
project
The knowledge system agents can share, change, and recover.
Vellis gives MCP-capable agents one typed, locally owned context graph with explicit semantics, validated change, deterministic query, and recoverable state.
Codex
Claude Web
Local MCP
Team app
Stable anchors, typed facts, explicit relationships, and schemas keep meaning inspectable.
MCP workflows and setup guidance keep agents on known, inspectable paths through the engine.
Local filesystem and SQLite state can be snapshotted, restored, replayed, and verified.
More than a graph server
Vellis is not generic storage or retrieval. It gives agents one explicit knowledge model, a shaped operating surface, and a controlled lifecycle for change and recovery.
Stable anchors, typed fact objects, and explicit link records make meaning inspectable.
Validate proposed writes, inspect projected state, and evolve schemas deliberately.
Snapshot, restore, and replay knowledge state, then verify the rebuilt result.
Five parts, one explicit knowledge contract.
RTG separates identity, fact state, and relationships. Schema gates change; ledger and snapshots make the resulting graph auditable, recoverable, and rebuildable. Human-owned textual SysML v2 models define reusable component contracts and Vellis application composition; generated references and validation keep that engineering authority inspectable as implementations evolve.
Define valid anchor, fact, and link types; validation gates live writes and staged changes.
Independently identified, typed relationships carry explicit source and target UUIDs.
Stable identities survive changes to the facts and descriptions associated with them.
Typed JSON bundles stay separately addressable and can describe one or many anchors.
Record operations, restore state, replay history, and verify rebuilt equivalence.
What this looks like as structured knowledge
Vellis keeps the same graph skeleton across very different kinds of work: stable things, typed relationships, and attached fact records.
A teammate owns a task. Both things keep small typed fact records; the relationship stays separate.
Apache 2.0. Runnable, inspectable, portable.
Vellis remains a standalone local path you can run, snapshot, restore, and replay—without depending on a closed hosted service.
Quickstart
Copy one prompt into your coding agent. It explains Vellis, asks a few setup-shaping questions, and verifies the local path before changing anything.
Local-first setup. No installs, shell edits, or config changes without approval.