second-brain-ingest skillA
second-brain-ingest is agent-read markdown (skill) from undefined-ui/second-brain-os: Turn raw source material in a second-brain vault into linked wiki pages: read the source, split it into concepts and entities, write or update pages, connect them to existing pages, and record the run in the log. Use this skill whenever the user drops a file into raw/, pastes an article, transcript or PDF and asks to add it to the vault, says "ingest this", "add this to my second brain", "process raw", or asks to catch up on unprocessed sources, even if they do not name the ingest command. Do NO.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Ingest a source An ingest that only writes a summary page produces a vault that grows without getting smarter. The whole value is in the second half of the job: connecting the new material to what is already there. A page that lands unlinked is invisible within a week. ## Core rule Nothing is ingested until it is linked. Every run ends with the new pages connected to existing pages in both directions. ## Workflow 1. **Read the source completely** before writing anything. Partial reads produce pages built from the introduction, which is where sources are least specific. 2. **Check what already exists.** Search the wiki for the main entities and concepts. Ingesting into an empty vault and ingesting into a vault of 300 pages are different jobs: in the second, most of your work is updating pages, not creating them. 3. **Write the source page** in `wiki/sources/`. Record claims as claims, with the source attached. 4. **Extract concepts and entities.** One page per idea. If a concept page exists, add what this source contributes and update `updated:`. If it contradicts what is there, record both positions rather than replacing. …
Read the whole file at its exact version.
How to install
mdr add undefined-ui/second-brain-os/second-brain-ingest@git:20260907.8c47c65mdr add undefined-ui/second-brain-os/second-brain-ingest@sha256:5dd5266e7a753a41Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_5ryqzjb36wfwoq7y)
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Versions
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (3491 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
undefined-ui/second-brain-os · 296 stars · license MIT · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5ryqzjb36wfwoq7y GET https://markdownregistry.com/api/v1/resolve?ref=undefined-ui/second-brain-os/second-brain-ingest GET https://markdownregistry.com/api/v1/blob/5dd5266e7a753a414274a90a2ccf6eb5e5ad38c5cdaf58a81605279437d7102d
Your agent does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.