# Second Brain Review

> >-

- **Type:** Skill
- **Install:** `agentstack add skill-undefined-ui-second-brain-os-second-brain-review`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [undefined-ui](https://agentstack.voostack.com/s/undefined-ui)
- **Installs:** 0
- **Category:** [AI & ML](https://agentstack.voostack.com/c/ai-and-ml)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [undefined-ui](https://github.com/undefined-ui)
- **Source:** https://github.com/undefined-ui/second-brain-os/tree/main/skills/second-brain-review
- **Website:** https://x.com/undefinedKi/status/2068306794116501544

## Install

```sh
agentstack add skill-undefined-ui-second-brain-os-second-brain-review
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Review the vault

Capture systems fail at the point where nothing comes back out. A review is the
loop that closes: it turns a week of ingestion into something the owner reads
and acts on, and it is what makes the vault feel alive rather than archival.

## Core rule

A review reports on the vault, not on the agent's activity. Nobody needs to
know how many tool calls ran; they need to know what they now know.

## Workflow

1. **Diff the period.** New and updated pages since the last review, from
   `log.md` and frontmatter dates.
2. **Find the clusters.** Which concepts gained the most links. That is where
   the owner's attention actually went, which is often not where they think it
   went.
3. **Surface contradictions** recorded during the period and still unresolved.
4. **List open questions** from concept and synthesis pages.
5. **Find the neglected.** Pages linked often but thin, or gaps in `index.md`
   that keep getting referenced.
6. **Recommend three things to read or write next**, each tied to a specific
   page.

## Output format

```
## Week of 

Added:  pages,  sources ingested

### Where your attention went

### Unresolved

### Thin spots

### Next
1. 
2.
3.
```

## Calibration

Reviews that list everything get skimmed and then ignored. Keep it under a
page. Three recommendations, not ten. If a week produced nothing worth
reporting, say that in one line instead of manufacturing insight.

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [undefined-ui](https://github.com/undefined-ui)
- **Source:** [undefined-ui/second-brain-os](https://github.com/undefined-ui/second-brain-os)
- **License:** MIT
- **Homepage:** https://x.com/undefinedKi/status/2068306794116501544

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** no
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-undefined-ui-second-brain-os-second-brain-review
- Seller: https://agentstack.voostack.com/s/undefined-ui
- Browse the marketplace: https://agentstack.voostack.com/browse

---
Listed on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Creators keep 70%.