# Verify

> Fact-check claims encountered during reading — dates, names, events, citations. Use when encountering historical facts or disputed claims.

- **Type:** Skill
- **Install:** `agentstack add skill-yha9806-academic-writing-toolkit-verify`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [yha9806](https://agentstack.voostack.com/s/yha9806)
- **Installs:** 0
- **Category:** [Agent Skills](https://agentstack.voostack.com/c/agent-skills)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [yha9806](https://github.com/yha9806)
- **Source:** https://github.com/yha9806/academic-writing-toolkit/tree/master/plugins/academic-writing-toolkit/skills/verify

## Install

```sh
agentstack add skill-yha9806-academic-writing-toolkit-verify
```

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

## About

# /verify — Fact Verification Skill

## Purpose

Fact-check claims encountered during reading sessions. This covers dates, names, historical events, publication details, and attribution of ideas. Use when the user questions a claim or when a factual assertion seems uncertain.

## Trigger Words

This skill activates on: `verify`, `check this`, `fact-check`, `is this correct`, `/verify`.

## Workflow

1. **Extract the claim** from the user's input or from conversation context. Identify the specific factual assertion to verify (date, name, event, publication, attribution).
2. **Search authoritative sources** using WebSearch. Prioritise:
   - Wikipedia (for dates, biographical facts, historical events)
   - Academic databases (Google Scholar, JSTOR, PhilPapers)
   - Publisher websites (for publication dates, editions, ISBNs)
   - Encyclopedias (Stanford Encyclopedia of Philosophy, Britannica)
3. **Compare** the original claim against verified information.
4. **Output the verdict** using the format below.
5. **Optionally annotate the notes file.** If the user confirms, use Edit to add a `(verified)` or `(corrected: {correct info})` tag next to the relevant entry in the notes file.

## Output Format

```
## Verification

**Claim**: {the original claim as stated in the source}
**Verdict**: Confirmed | Needs correction | Incorrect | Unverifiable

| Item | Original | Verified |
|------|----------|----------|
| {specific fact} | {as claimed} | {as verified} |

**Source**: {single-line citation in the project's declared style — see `literature/reading_notes/_template_NOTES.md` for per-style examples; the active style is `Citation style:` in `CLAUDE.md`. Append the URL after the citation if the source is web-only}
**Confidence**: High | Medium | Low
**Notes**: {any additional context, e.g., "Date varies by edition" or "Multiple conflicting sources"}
```

## Multiple Claims

When verifying several claims at once, produce one verification block per claim, numbered sequentially:

```
### 1. {Brief claim description}
{verification block}

### 2. {Brief claim description}
{verification block}
```

## Annotation

When the user says "annotate" or "mark in notes" after verification:
- Use Edit to find the relevant passage in the notes file.
- Append the tag inline: `(verified 2026-03-30)` or `(corrected: {correct value}, verified 2026-03-30)`.
- Do not alter the original text of the note -- add the tag after it.

## Constraints

1. **Never auto-correct notes** without user confirmation. Present the verdict first, then ask if the user wants to annotate.
2. **Cite sources** with URLs whenever possible. Do not present unverifiable assertions as fact.
3. **Acknowledge uncertainty.** If sources conflict, report all versions and mark confidence as Low.
4. **No emoji** in output.
5. **Scope**: This skill verifies factual claims only. For argument analysis or interpretation, defer to the user's own reading.

## Source & license

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

- **Author:** [yha9806](https://github.com/yha9806)
- **Source:** [yha9806/academic-writing-toolkit](https://github.com/yha9806/academic-writing-toolkit)
- **License:** MIT

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-yha9806-academic-writing-toolkit-verify
- Seller: https://agentstack.voostack.com/s/yha9806
- Browse the marketplace: https://agentstack.voostack.com/browse

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