Skills for Real Engineers. Straight from my .agents directory.
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
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)
1# Review the vault23Capture systems fail at the point where nothing comes back out. A review is the4loop that closes: it turns a week of ingestion into something the owner reads5and acts on, and it is what makes the vault feel alive rather than archival.67## Core rule89A review reports on the vault, not on the agent's activity. Nobody needs to10know how many tool calls ran; they need to know what they now know.1112## Workflow13141. **Diff the period.** New and updated pages since the last review, from15 `log.md` and frontmatter dates.162. **Find the clusters.** Which concepts gained the most links. That is where17 the owner's attention actually went, which is often not where they think it18 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 specific24 page.2526## Output format2728```29## Week of <date>3031Added: <n> pages, <n> sources ingested3233### Where your attention went34<two or three sentences on the clusters>3536### Unresolved37<contradictions and open questions, each linked>3839### Thin spots40<pages that are referenced more than they deserve given their content>4142### Next431. <specific action tied to a page>442.453.46```4748## Calibration4950Reviews that list everything get skimmed and then ignored. Keep it under a51…
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