second-brain-ingest SKILL.md skillA
second-brain-ingest from undefined-ui/second-brain-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add undefined-ui/second-brain-os/second-brain-ingest@git:20260907.8c47c65Pins git:20260907.8c47c65 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- undefined-ui/second-brain-os
- Path
skills/second-brain-ingest/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260907.8c47c65, committed Sep 7, 2026
- Size
- 3,491 bytes
- Repository stars
- 1,499
- License
- MIT
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…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file 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@sha256:5dd5266e7a753a41The line at the top of this page pins the label git:20260907.8c47c65, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_5ryqzjb36wfwoq7y)
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Versions
The registry has recorded 1 version of this file, committed on Sep 7, 2026.
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 · 1,499 stars · license MIT · pushed 2026-11-03 · 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 AI assistant 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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.