Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add pedrohcgs/Claude-Mini --skill verify-claimsgit clone --depth 1 https://github.com/pedrohcgs/Claude-MiniWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/pedrohcgs/claude-mini/verify-claims)<a href="https://agentmods.dev/skills/pedrohcgs/claude-mini/verify-claims"><img src="https://agentmods.dev/badge/skills/pedrohcgs/claude-mini/verify-claims/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/pedrohcgs/claude-mini/verify-claims"><img src="https://agentmods.dev/badge/skills/pedrohcgs/claude-mini/verify-claims.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00137 | $0.01461 |
| Opus 5 | $0.00068 | $0.00731 |
| Sonnet 5 | $0.00027 | $0.00292 |
| Haiku 4.5 | $0.00014 | $0.00146 |
Grade A, and why
verify-claims scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/verify-claims — Chain-of-Verification on a Draft
Fact-check a draft using the Post-Flight Verification protocol (.claude/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.
How it works
Implements the 4-step CoVe loop from Dhuliawala et al. 2023 (arXiv: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
--sourceor auto-detected from draft) claim-verifieragent 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:
| Type | Example |
|---|---|
| Citation | "Smith (2019, JEL) shows X" |
| Numerical fact | "N = 10,000", "ATT = 0.42" |
| Negative literature | "No prior work studies X" |
| Named entity | researcher, paper title, venue, package, estimator name |
| Dataset claim | "The CPS contains field educ_attain" |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 10d ago First seen · 127 lines · 137 tokens per session scan A 00db06574261
verify-claims is a skill published in the GitHub repository pedrohcgs/Claude-Mini (11 stars, last pushed 4mo ago), licensed MIT. It adds 137 tokens to every session and 1,461 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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