---
title: "second-brain-core"
description: "Shared foundation for Spillwave ContentPack plugins: OKF schemas, typed edges, deterministic write helpers, progressive-disclosure packing, and write isolation."
canonical: https://agentpluginsdirectory.com/plugins/second-brain-core
last-updated: 2026-10-02
---

# second-brain-core
Shared foundation for Spillwave ContentPack plugins: OKF schemas, typed edges, deterministic write helpers, progressive-disclosure packing, and write isolation.
- Slug: second-brain-core
- Publisher: Rick Hightower
- Repository: https://github.com/SpillwaveSolutions/second-brain-core
- Manifest: plugin.json
- Version: 0.3.8
- License: MIT
- Category (editorial): agent-tooling
- Skills: 7 (sbc-capture, sbc-doctor, sbc-init, sbc-pack, sbc-retrieve, sbc-session, sbc-validate)
- MCP servers: 0
- Stars: 1
- Repository created: 2026-08-14
- Repository last pushed: 2026-09-12
- Publisher type: Organization
- Listing: https://agentpluginsdirectory.com/plugins/second-brain-core
- Schema: https://agent-plugins.org/schemas/1.0.0/plugin.schema.json

## What second-brain-core does, in the publisher's words

Shared foundation for Spillwave ContentPack plugins: OKF schemas, typed edges, deterministic write helpers, and progressive-disclosure packing. Dual-host (Claude Code + Grok Build + Codex).

MIT. Dual-host: Claude Code, Grok Build, and Codex (Agent Skill Standard). Writes OKF Markdown + YAML into a shared second-brain bundle so other agents and local jobs can read the same graph.

From the project README, punctuation lightly normalized. Full text: https://raw.githubusercontent.com/SpillwaveSolutions/second-brain-core/HEAD/README.md

## Skills

- sbc-capture: Capture a Second Brain Core noun into the shared second brain via the deterministic write helper.
- sbc-doctor: Health-check the Second Brain Core catalogs and report empty indexes or missing schemas.
- sbc-init: Scaffold the Second Brain Core catalogs in a shared second-brain bundle.
- sbc-pack: Build a bounded ContextPack from a Second Brain Core root concept (default 2 hops, 20 nodes, 1/4 window token budget).
- sbc-retrieve
- sbc-session: Open or close an isolated second-brain write session (worktree + PR). Use before writing when multiple agents share one knowledge remote.
- sbc-validate: Validate Second Brain Core concepts: required fields, types, and in-bundle links.

Descriptions come from the frontmatter of each SKILL.md, punctuation lightly normalized.