# Verify Claims

Run Chain-of-Verification (CoVe) on a draft or a block of text with factual claims.

- Repository: https://github.com/pedrohcgs/claude-code-my-workflow (1676 stars)
- Category: AI and agents
- License: MIT
- Last updated: 2026-09-27
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add pedrohcgs/claude-code-my-workflow --skill verify-claims -g -a claude-code -y`
Codex: `npx skills add pedrohcgs/claude-code-my-workflow --skill verify-claims -g -a codex -y`
Cursor: `npx skills add pedrohcgs/claude-code-my-workflow --skill verify-claims -g -a cursor -y`
Gemini CLI: `npx skills add pedrohcgs/claude-code-my-workflow --skill verify-claims -g -a gemini-cli -y`

## Description

Run Chain-of-Verification (CoVe) on a draft or a block of text with factual claims. Spawns the `claim-verifier` agent in a fresh context (never a conversation fork) so it never sees the draft, then reports which claims are supported, contradicted, or unverifiable. Use when user says "verify these citations", "check the claims in X", "did I hallucinate anything", "fact-check this draft", "run CoVe on this", or after any text generation that asserts facts about papers, datasets, or numerical results. NOT for style/grammar review (use `/proofread`) or substance review (use `/review-paper`).

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# /verify-claims, Chain-of-Verification on a Draft

Fact-check a draft using the **Post-Flight Verification protocol** ([`.claude/rules/post-flight-verification.md`](../../rules/post-flight-verification.md)).

**Input:** `$ARGUMENTS`, path to a file containing the draft (markdown, .qmd, .tex, .md) or a shorthand pointer. Optional flags:

- `--source <path-or-url>`, one or more source-material pointers (repeat for multiple). If omitted, the skill infers from context (e.g., papers referenced, cited arXiv URLs).
- `--no-fail-closed`, downgrade FAIL outcomes to warnings without regeneration. Use sparingly.

## When to pick this skill

- **`/verify-claims`** (this skill), ad-hoc fact-checking on any draft or text block the user hands you. One-shot, user-invoked.
- **Other skills that auto-run Post-Flight internally** (`/lit-review`, `/research-ideation`, `/respond-to-referees`, `/review-paper --peer`), no need to call this separately; they already run it.
- **`/proofread`**, grammar, typos, overflow. Different lens.
- **`/review-paper`** (default mode), full manuscript review, not just claim verification.
- **`/validate-bib`**, checks citations *exist* and are well-formed (structural + DOI). This skill checks they *hold* (the cited paper supports the attributed claim). Complementary, run both before submission.

## How it works

Implements the 4-step CoVe loop from Dhuliawala et al. 2023 ([arXiv:2309.11495](https://arxiv.org/abs/2309.11495)), with architectural enforcement of the fresh-context independence trick.

### Phase 0, Pre-Flight

Confirm:
- Draft file exists and is readable
- At least one source pointer available (either `--source` or auto-detected from draft)
- `claim-verifier` agent file exists at `.claude/agents/claim-verifier.md`

If any fail → surface the failure, do NOT proceed.

### Phase 1, Extract claims

Read the draft. Identify factual assertions of these types:

The rest: https://github.com/pedrohcgs/claude-code-my-workflow/blob/HEAD/.claude/skills/verify-claims/SKILL.md