# Second Brain Metrics

> >-

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

## Install

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

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

## About

# Record metrics

A single reading tells you almost nothing. Direction over months is the
information, and nobody remembers what last quarter's orphan rate was.

## Core rule

Four numbers, appended to a dated log, compared against the last entry. Never
page count or word count.

## Workflow

1. **Run** `scripts/vault_stats.py` and `scripts/link_check.py`.
2. **Record:** orphan rate, average degree, component count, stale-concept rate,
   with the date and total pages for context.
3. **Append** to the metrics note. Never overwrite previous entries.
4. **Compare** against the last snapshot and name what moved.
5. **Interpret only what changed.** A stable number needs no commentary.

## Output format

```
 | pages 
orphan rate    %   ( since )
avg degree         ()
components         (main %)
stale concepts %   ()

Moved: 
Watch: 
```

## Calibration

A rising orphan rate with a rising page count means ingestion has stopped
linking. That is the single most important pattern in this report and it should
be called out explicitly, not left in the numbers.

Do not recommend more than one thing to fix. A metrics report with five action
items gets ignored.

## 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-metrics
- 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%.