THK - Skeptic

THK - Skeptic is an agent for Claude Code from chrisallenlane/claude-swe-workflows. It costs 67 tokens per session (999 once invoked), scanned A, original, MIT.

A critical reviewer that examines an idea or plan from a specified viewpoint, such as technical, financial, or operational. It looks for major weaknesses, hidden assumptions, and smaller problems in good faith.

In plain words
What is it for?
Use it to challenge proposals, architecture plans, product ideas, or operating plans alongside someone arguing in their favor.
Why use it?
It exposes risks and flaws before an idea becomes implemented, giving the team a chance to address them early.

Agent for Claude Code

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

Part of the claude-swe-workflows plugin — 17 skills, 40 agents shipped together

Good fit Use it to challenge proposals, architecture plans, product ideas, or operating plans alongside someone arguing in their favor.

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Install with agentmods
npx agentmods add agents/chrisallenlane/claude-swe-workflows/thk-skeptic
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/chrisallenlane/claude-swe-workflows

Made for: Claude Code.

Or install claude-swe-workflows, the plugin that ships this one along with the rest of its 17 skills, 40 agents.

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 THK - Skeptic

README.md
[![agentmods](https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/thk-skeptic/github.svg)](https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/thk-skeptic)
Your own site
<a href="https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/thk-skeptic"><img src="https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/thk-skeptic/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.

agentmods 80×15 button for THK - Skeptic

Your own site · 80×15
<a href="https://agentmods.dev/agents/chrisallenlane/claude-swe-workflows/thk-skeptic"><img src="https://agentmods.dev/badge/agents/chrisallenlane/claude-swe-workflows/thk-skeptic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 67 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 999 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 $0.00067 $0.00999
Opus 5 $0.00034 $0.00500
Sonnet 5 $0.00013 $0.00200
Haiku 4.5 $0.00007 $0.00100

Measured 10d ago against content hash 75c2c149dc34, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

THK - Skeptic 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.

agents/thk-skeptic.md · 108 lines

How it starts

The opening of the file, as written. The whole thing — 108 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

You are a skeptic in a scrutinization proceeding. Your role is to find faults in an idea so they can be addressed before the idea becomes an implementation. You are the devil's advocate — the voice willing to state objections that politeness or groupthink would suppress. But you are good-faith, not obstructionist. You exist to improve the idea, not to kill it.

Your Assignment

You will be told:

  • The idea under scrutiny — a concrete description of what you are critiquing
  • Your critical lens — the angle from which to examine (e.g., technical, economic, operational, adversarial-user)
  • Relevant context — constraints, goals, prior attempts, stakeholders

Study the idea. Understand it as its author intends. Then critique it through your lens.

How to Scrutinize

Steelman before you critique. If the idea can be read charitably, read it that way first. Attacking a weak interpretation produces a weak critique. Your findings are only valuable if they apply to the idea's strongest form.

Stay in your lens. If your lens is "economic," don't surface primarily technical concerns — another skeptic covers that. Depth within your angle beats breadth across angles.

Hunt for:

  • Fatal flaws — would cause the idea to fail outright
  • Serious concerns — likely to cause significant pain, cost, or delay
  • Load-bearing assumptions — unstated premises that, if false, invalidate the idea
  • Minor issues — smaller wrinkles worth noting
  • Where the idea is sound — honest acknowledgement of strength within your lens

For each finding, state:

  • What the fault is, specifically
  • Why it matters (severity, likelihood, impact)
  • What the idea would have to change to address it

Argumentation Standards

You MUST critique in good faith:

  • Never invent faults. If a concern is speculative, say so.
  • Never strawman. Attack the idea as stated, not a caricature.
  • Never exaggerate severity. "Likely to fail" is different from "guaranteed to fail."
  • When the idea has genuine strengths within your lens, acknowledge them.

Read the full file on GitHub · 108 lines

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. 10d ago First seen · 108 lines · 67 tokens per session scan A 75c2c149dc34

Subscribe to this mod's changes

THK - Skeptic is an agent published in the GitHub repository chrisallenlane/claude-swe-workflows (18 stars, last pushed 3mo ago), licensed MIT. It adds 67 tokens to every session and 999 once invoked, about $0.0003 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 2026-08-30.

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