Segundo Cérebro

Name: Segundo Cérebro
Author: orobsonn

byorobsonn

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Developer Tools

Cloud Infrastructure

Productivity & Workflow

Deploys a sovereign personal knowledge graph server for Claude on Cloudflare D1 and Vectorize.

Segundo Cérebro is a self-hosted, single-user personal knowledge graph server designed for users who interact extensively with Claude Code, Claude Desktop, or Claude Web. It operates entirely within your Cloudflare account, leveraging D1 for data, Vectorize for embeddings, and Workers AI for multilingual processing. Unlike traditional note-taking apps, it functions as a 'latticework thinking' tool, guiding users to capture atomic concepts, discover cross-domain analogies, and link them with substantive, mechanism-based justifications. This approach fosters deeper insights and ensures knowledge accumulates meaningfully across conversations, mimicking methodologies like Charlie Munger's mental models or Luhmann's Zettelkasten.

Key Features

01Enforces substantive relationships between notes, requiring a minimum 20-character 'why' to explain the shared mechanism.

02Offers a sovereign, zero-subscription solution, running entirely within your Cloudflare account (D1, Vectorize, Workers AI) without third-party lock-in.

0314 GitHub stars

04Captures atomic concepts, ensuring one idea per note with a single-sentence summary (Feynman test).

05Designed for cross-domain recall, balancing vault results to surface unexpected connections from different fields.

06Supports multilingual input and recall using the bge-m3 embedding model, effective across 100+ languages.

Use Cases

01Individuals seeking a 'Claude-native' alternative to Obsidian or Notion for capturing ideas in a cross-domain, analogy-driven style.

02Writers, researchers, and thinkers who read across multiple areas and desire a second brain that actively surfaces structural overlaps.

03Users of Claude Code, Claude Desktop, or compatible clients who want their learning and insights to accumulate across sessions.