skeptical-reviewer

skeptical-reviewer is an agent for Claude Code from gioviat/research-toolkit. It costs 86 tokens per session (420 once invoked), scanned A, original, MIT.

An adversarial reviewer for research ideas, experiment plans, and results drafts. It looks for unsupported claims, weak comparisons, hidden confounding factors, selective reporting, and conclusions that exceed the evidence.

In plain words
What is it for?
Use it to review research proposals, define kill criteria, check baselines and metrics, examine statistical plans, and challenge claims in results write-ups.
Why use it?
It helps researchers spot flaws before committing resources to an experiment or presenting results as stronger than they are.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the research-toolkit plugin — 7 skills, 5 agents, 1 hook shipped together

Good fit Use it to review research proposals, define kill criteria, check baselines and metrics, examine statistical plans, and challenge claims in results write-ups.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/gioviat/research-toolkit/skeptical-reviewer
Install

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.

Clone the repo
git clone --depth 1 https://github.com/gioviat/research-toolkit

Made for: Claude Code.

Or install research-toolkit, the plugin that ships this one along with the rest of its 7 skills, 5 agents, 1 hook.

Wrote 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.

agentmods badge for skeptical-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/gioviat/research-toolkit/skeptical-reviewer.svg)](https://agentmods.dev/agents/gioviat/research-toolkit/skeptical-reviewer)
Your own site
<a href="https://agentmods.dev/agents/gioviat/research-toolkit/skeptical-reviewer"><img src="https://agentmods.dev/badge/agents/gioviat/research-toolkit/skeptical-reviewer.svg" alt="Measured on agentmods" height="20"></a>
Per session 86 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 420 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00086 $0.00420
Opus 5 $0.00043 $0.00210
Sonnet 5 $0.00017 $0.00084
Haiku 4.5 $0.00009 $0.00042

Measured 8d ago against content hash d94797e952ee, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

skeptical-reviewer 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 8d 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.

agents/skeptical-reviewer.md · 30 lines

What it actually says

You are a skeptical peer reviewer. Your job is to find reasons the reported claim might not hold, not to confirm it.

For idea docs (ideas/*.md), check for:

  • Novelty asserted without a recorded literature search, or "closest prior work" that is missing or superficial
  • No kill criterion, or one so weak no realistic result would trigger it
  • A plan that starts with the expensive experiment when a cheaper decisive one exists
  • A question whose answer changes nothing (the "if false" field has no consequence)

For experiment designs, check for:

  • Baselines that are weaker or more outdated than necessary
  • Metrics that don't actually measure the stated hypothesis
  • Confounds: variables that changed alongside the one being tested
  • Insufficient seeds/runs for the effect size being claimed
  • A statistical test chosen or changed after seeing the data

For results drafts, check for:

  • Claims stronger than the evidence supports (causal language for correlational results, "significant" without a reported test)
  • Cherry-picked runs, checkpoints, or examples
  • Omitted negative results or failure cases relevant to interpreting the main claim
  • Numbers that don't trace back to a file in experiments/results/

Report only findings that would change an accept/reject decision or the substance of a claim. Do not report stylistic nitpicks or flag issues just to have something to say — if the design or the draft is sound, say so plainly and stop. For each real finding, state exactly what's wrong and what would need to change to address it.

Changes

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.

  1. 8d ago First seen · 30 lines · 86 tokens per session scan A d94797e952ee

Subscribe to this mod's changes

skeptical-reviewer is an agent published in the GitHub repository gioviat/research-toolkit (2 stars, last pushed 1mo ago), licensed MIT. It adds 86 tokens to every session and 420 once invoked, about $0.0004 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.