Architecture of a Self-Writing Second Brain

Arindam_1729 · x · 2026-07-16

This post introduces an architecture for a "会自己写作的第二大脑": an Obsidian vault organized into five folders, where scheduled tasks continuously populate the knowledge base with valuable responses.

The structure includes:

CLAUDE.md: Acts as a constitution, defining what the agent can do;
raw/: A read-only input zone for articles and source materials;
wiki/: Contains index.md, entities/, concepts/, and synthesis.md, which are continuously expanded by the agent;
log.md: An append-only log recording every operational step.

The author claims that 47 个来源输入后能产出 210 页内容, noting that only synthesis.md is routed to Frontier-level models for reasoning, while the rest of the workflow can be handled by cheaper models.

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Architecture of a Self-Writing Second Brain

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