# Second Brain Merge

> >-

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

## Install

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

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

## About

# Merge duplicate pages

A merge is irreversible in the way that matters: afterwards you cannot tell
which claim came from which page. Two ideas that look identical from their
summaries are often a general case and a specific one.

## Core rule

Never merge unprompted. Propose, wait for approval, then follow the procedure
exactly.

## Workflow

1. **Pick the survivor** by canonical name, not by which page is longer.
2. **Merge content.** Every distinct claim survives with its source. Overlapping
   claims collapse; differing ones both stay, following the contradiction rules.
3. **Merge aliases,** including the dead page's title as an alias on the
   survivor. This is what keeps old links and the user's memory working.
4. **Redirect inbound links** to the survivor. Check every backlink.
5. **Delete the old page,** or leave a stub only if it was linked from outside
   the vault.
6. **Record in `log.md`:** both names, the date, and why.

## Output format

```
Merged: [[old]] -> [[survivor]]
Claims kept from old page: 
Aliases added: 
Inbound links redirected: 
Conflicts recorded: 
```

## Calibration

If the two pages disagree about anything factual, that is a signal they may not
be duplicates. Surface the disagreement and ask before proceeding.

Never merge a page marked `maintained_by: human` into another without explicit
confirmation naming that page.

## 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-merge
- 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%.