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SKILL.md

second-brain-ingest

Agent skill fromundefined-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 NOT use for answering questions from an existing vault, for linting or repairing pages, or for editing notes the user wrote by hand.

How to install second-brain-ingest

install second-brain-ingest
# install the second-brain-os pack with the skills CLI
npx skills add undefined-ui/second-brain-os

# or add only this skill to Claude Code: copy the folder

skills/second-brain-ingest/

# into

~/.claude/skills/second-brain-ingest/ (all projects)

.claude/skills/second-brain-ingest/ (one project)

skills/second-brain-ingest/SKILL.md

MITFull file
1# Ingest a source
2
3An ingest that only writes a summary page produces a vault that grows without
4getting smarter. The whole value is in the second half of the job: connecting
5the new material to what is already there. A page that lands unlinked is
6invisible within a week.
7
8## Core rule
9
10Nothing is ingested until it is linked. Every run ends with the new pages
11connected to existing pages in both directions.
12
13## Workflow
14
151. **Read the source completely** before writing anything. Partial reads
16 produce pages built from the introduction, which is where sources are least
17 specific.
182. **Check what already exists.** Search the wiki for the main entities and
19 concepts. Ingesting into an empty vault and ingesting into a vault of 300
20 pages are different jobs: in the second, most of your work is updating
21 pages, not creating them.
223. **Write the source page** in `wiki/sources/`. Record claims as claims, with
23 the source attached.
244. **Extract concepts and entities.** One page per idea. If a concept page
25 exists, add what this source contributes and update `updated:`. If it
26 contradicts what is there, record both positions rather than replacing.
275. **Link in both directions.** The source page links to every concept and
28 entity it touches; each of those links back. Add any missing target pages,
29 or list them under Gaps in `index.md`.
306. **Update `index.md` and append to `log.md`** in the same run, because an
31 index that lags is how a vault starts drifting.
32…

Excerpt shown under the repository's MIT license.

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