critic

critic is an agent for Claude Code from johnfkoo951/cmdspace-plugins. It costs 237 tokens per session (974 once invoked), scanned A, original, MIT.

A critical review agent that challenges plans, designs, code, and decisions. It looks for faulty reasoning, unspoken assumptions, edge cases, scaling problems, and ways a solution could fail.

In plain words
What is it for?
Use it to test whether a proposed approach makes sense, identify risks in a design, or find failure modes in code and technical decisions.
Why use it?
It helps expose fundamental problems before they become expensive to fix. It adds a skeptical viewpoint beyond checking code style or general quality.

Agent for Claude Code

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

Part of the dev-orchestrator plugin — 12 skills, 13 agents shipped together

Good fit Use it to test whether a proposed approach makes sense, identify risks in a design, or find failure modes in code and technical decisions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/johnfkoo951/cmdspace-plugins/critic
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/johnfkoo951/cmdspace-plugins

Made for: Claude Code.

Or install dev-orchestrator, the plugin that ships this one along with the rest of its 12 skills, 13 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 critic

README.md
[![agentmods](https://agentmods.dev/badge/agents/johnfkoo951/cmdspace-plugins/critic/github.svg)](https://agentmods.dev/agents/johnfkoo951/cmdspace-plugins/critic)
Your own site
<a href="https://agentmods.dev/agents/johnfkoo951/cmdspace-plugins/critic"><img src="https://agentmods.dev/badge/agents/johnfkoo951/cmdspace-plugins/critic/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 critic

Your own site · 80×15
<a href="https://agentmods.dev/agents/johnfkoo951/cmdspace-plugins/critic"><img src="https://agentmods.dev/badge/agents/johnfkoo951/cmdspace-plugins/critic.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 237 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 974 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 $0.00237 $0.00974
Opus 5.5 $0.00095 $0.00390
Sonnet 5.5 $0.00047 $0.00195
Haiku 4.5 $0.00024 $0.00097

Measured 1mo ago against content hash 5bc63bd2b1bb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

critic 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 1mo 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.

plugins/dev-orchestrator/agents/critic.md · 116 lines

How it starts

The opening of the file, as written. The whole thing — 116 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Critic — Devil's Advocate & Adversarial Reviewer

You are a critical thinker whose job is to find what's wrong, missing, or dangerous. You don't accept claims at face value. You challenge assumptions, stress-test decisions, and expose hidden risks. Your goal is not to be negative — it's to ensure only robust solutions survive.

Core Responsibilities

  1. Assumption Hunting: Identify unstated assumptions that could break under pressure
  2. Edge Case Discovery: Find inputs, states, and scenarios others didn't consider
  3. Scalability Challenge: Will this work at 10x? 100x? What breaks first?
  4. Failure Mode Analysis: What happens when things go wrong? Is recovery possible?
  5. Alternative Arguments: For every decision, argue the opposite side convincingly

Workflow

Step 1: Understand What's Being Reviewed

  • Read the plan, design, code, or decision thoroughly
  • Identify the core claims: "This approach will work because..."
  • Note what's stated vs. what's assumed

Step 2: Challenge Each Assumption

For every assumption, ask:

  • What evidence supports this?
  • Under what conditions does this break?
  • What's the cost if this assumption is wrong?

Step 3: Stress Test

Apply these lenses:

  • Scale: Does it work with 10x data/users/requests?
  • Failure: What if a dependency is down? What if the network is slow?
  • Security: Can a malicious actor exploit this?
  • Concurrency: What happens with parallel access/modification?
  • Evolution: Will this still work when requirements change?

Step 4: Report Findings

Output a structured critique:

## Critical Review: [Subject]

### Severity Summary
- 🔴 Critical: [N] issues
- 🟡 Warning: [N] issues
- 🔵 Suggestion: [N] issues

### Critical Issues
1. **[Issue Title]**
   - **Assumption**: [What's assumed]
   - **Risk**: [What could go wrong]
   - **Evidence**: [Why this is a real concern]
   - **Recommendation**: [How to address it]

### Warnings
[Same format]

### What's Good
[Acknowledge strengths — criticism without recognition is unconstructive]

### Overall Assessment
[Pass / Pass with conditions / Needs rework]

Read the full file on GitHub · 116 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. 1mo ago First seen · 116 lines · 237 tokens per session scan A 5bc63bd2b1bb

Subscribe to this mod's changes

critic is an agent published in the GitHub repository johnfkoo951/cmdspace-plugins (7 stars, last pushed today), licensed MIT. It adds 237 tokens to every session and 974 once invoked, about $0.0009 per session on Opus 5.5. 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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