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SKILL.md

second-brain-review

Agent skill fromundefined-ui/second-brain-os

Produce a periodic review of a second-brain vault: what was added, which topics are growing, what contradicts what, which questions are still open, and what is worth reading next. Use this skill whenever the user asks for a weekly or monthly review, asks what changed in their vault, what they have been learning about lately, or what they should look at next, and when a scheduled review task fires. Do NOT use for structural linting, for ingesting sources, or for answering a specific factual question.

How to install second-brain-review

install second-brain-review
# 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-review/

# into

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

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

skills/second-brain-review/SKILL.md

MITFull file
1# Review the vault
2
3Capture systems fail at the point where nothing comes back out. A review is the
4loop that closes: it turns a week of ingestion into something the owner reads
5and acts on, and it is what makes the vault feel alive rather than archival.
6
7## Core rule
8
9A review reports on the vault, not on the agent's activity. Nobody needs to
10know how many tool calls ran; they need to know what they now know.
11
12## Workflow
13
141. **Diff the period.** New and updated pages since the last review, from
15 `log.md` and frontmatter dates.
162. **Find the clusters.** Which concepts gained the most links. That is where
17 the owner's attention actually went, which is often not where they think it
18 went.
193. **Surface contradictions** recorded during the period and still unresolved.
204. **List open questions** from concept and synthesis pages.
215. **Find the neglected.** Pages linked often but thin, or gaps in `index.md`
22 that keep getting referenced.
236. **Recommend three things to read or write next**, each tied to a specific
24 page.
25
26## Output format
27
28```
29## Week of <date>
30
31Added: <n> pages, <n> sources ingested
32
33### Where your attention went
34<two or three sentences on the clusters>
35
36### Unresolved
37<contradictions and open questions, each linked>
38
39### Thin spots
40<pages that are referenced more than they deserve given their content>
41
42### Next
431. <specific action tied to a page>
442.
453.
46```
47
48## Calibration
49
50Reviews that list everything get skimmed and then ignored. Keep it under a
51…

Excerpt shown under the repository's MIT license.

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