What is fablesecondbrain?

This repository is a public knowledge base built as an Obsidian vault, organized around research into Claude Fable 5, Claude Mythos, Claude Code, and general practices for operating AI agents. The author is explicit that this project has no official connection to Anthropic and that everything in it comes from publicly available sources. The core idea is to turn scattered public information into linked, source-cited notes. Every note carries metadata, links to other notes, a citation back to its original source, and a confidence tag, so the whole vault forms one connected graph that can be browsed in Obsidian or on a companion website built with GitHub Pages. Alongside the notes, the project keeps a ledger of sources and a separate ledger of verified claims, so it stays clear where each piece of information came from and whether it has been checked. Audit scripts check the vault's completeness and consistency before it can be marked ready. The project describes itself as advisory only. It does not change any accounts, production systems, or live infrastructure, and it does not grant any rights to third-party material or make legal claims. Before anything is published, the README lays out rules such as keeping raw source captures and any credentials, tokens, or private data out of the public site, and using names like Anthropic, Claude, Fable, and Mythos only in a descriptive way, not as an endorsement. Beyond the note vault itself, the repository includes a Python package and command line tool for working with these vaults. This lets someone create a new named vault for a project or client, add new source material to it, run a synthesis step to generate notes and claims from that material, produce visual reports, and check what to do next. A separate demo vault is included so the tools can be tried out without touching the real research vault. The repository also ships a sanitized, public-safe version of the site under a site folder, deployed through a GitHub Pages workflow, which intentionally leaves out private notes, raw captures, and any account-specific details.