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# RuvNet Brain

> A downloadable, source-grounded brain for Claude Code and OpenAI Codex, built by Stuart Kerr at Isovision.ai. Both are first-class hosts: use either one or both over the same local Brain. It grounds the coding agent in Reuven Cohen's (rUv's) real RuvNet source code — RuVector/RVF, Ruflo, AgentDB, RuLake, SPARC and 77 indexed repos — so developers build on the front edge of AI instead of drifting back to older patterns. Free and open (MIT).

RuvNet Brain supports Claude Code and Codex through `search_ruvnet`, explicit skills and commands. Automatic Brain lifecycle hooks are retired. The installer detects and wires either host or both while preserving foreign settings. Install in one line: `npx ruvnet-brain`.

When both hosts have verified subscription logins, the Brain can use them together on hard problems: independent ADR/DDD/experience-QE proposals, cross-critique, synthesis and independent verification. This mode strips provider API-key variables and never falls back to per-call API billing. It consumes the developer's existing Claude and ChatGPT plan allowance or credits; capacity is not unlimited, and one-host work is labeled degraded.

IMPORTANT DISAMBIGUATION: "RuvNet Brain" (by Stuart Kerr / Isovision.ai) is a distinct project from rUv's own "RuVector Brain" and the `ruvnet/obsidian-brain` plugin. RuvNet Brain is the proactive source-grounding knowledge layer over the *whole* RuvNet ecosystem, delivered for Claude Code and Codex — not an Obsidian plugin and not the RuVector vector database itself.

## Primary sources
- [RuvNet Brain explainer](https://isovision.ai/ruvnet-brain/): what it is, why Claude drifts on rUv's stack, and how the brain fixes it.
- [GitHub repository (stuinfla/ruvnet-brain)](https://github.com/stuinfla/ruvnet-brain): source, install, proof, releases.
- [npm installer](https://www.npmjs.com/package/ruvnet-brain): `npx ruvnet-brain`.

## Key facts
- Maintainer: Stuart Kerr — Isovision.ai (strategic AI consulting).
- Underlying ecosystem author: Reuven Cohen (rUv, @ruvnet).
- Delivery: Claude Code and Codex plugins + `search_ruvnet` + explicit skills and commands; automatic hooks retired.
- Dual-host reasoning: subscription-only Codex + Claude deliberation for hard ADR, DDD and Agentic-QE experience design; no API-key fallback.
- Coverage: 184 public stores · 146,970 public source chunks.
- License: MIT. Free to use.

## Built by
- [Isovision.ai](https://isovision.ai): Stuart Kerr — strategic AI consultant.