# Second Brain Write

> >-

- **Type:** Skill
- **Install:** `agentstack add skill-undefined-ui-second-brain-os-second-brain-write`
- **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-write
- **Website:** https://x.com/undefinedKi/status/2068306794116501544

## Install

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

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

## About

# Write from the vault

The research is already done, cited and connected. What is left is the argument,
and that is the part the user should keep.

## Core rule

Assemble structure and evidence. Do not hand back finished prose as if it were
theirs.

## Workflow

1. **Find the relevant concept pages** and say what they collectively argue.
2. **Surface the disagreements.** These are where the user has something to say
   that is not the consensus view, and they are the most useful part of the
   outline.
3. **Build the outline** from pages, each point tied to the page behind it.
4. **Mark the weak points:** claims resting on one source, self-reported
   figures, anything the vault flags as unverified.
5. **Draft only if asked,** and say plainly that the phrasing is a first pass to
   be rewritten in their voice.
6. **Offer to ingest the finished piece** back as a source once published.

## Output format

```
Angle: 
Outline:
  1.  - [[page]], [[page]]
Weak points: 
Missing: 
```

## Calibration

If every point in the outline comes from one page, this is a summary of that
page, not an article. Say so.

Never introduce a specific number or quote that has no source page behind it.
That is the failure mode of writing with a model, and in a cited piece it is
the one that costs the most.

## 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-write
- Seller: https://agentstack.voostack.com/s/undefined-ui
- Browse the marketplace: https://agentstack.voostack.com/browse

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