reviewer

reviewer is an agent for Claude Code from isaacsight/kernel. It costs 0 tokens per session (249 once invoked), scanned A, original, MIT.

A senior code-review agent that examines code for security, correctness, type safety, performance, accessibility, and design-system issues.

In plain words
What is it for?
It is for reviewing changes and reporting each issue with its severity, location, explanation, and suggested fix.
Why use it?
It gives developers a consistent way to find defects and maintenance problems before code is merged or released.

Agent for Claude Code

Written for Claude Code: installed under .claude/.

Good fit It is for reviewing changes and reporting each issue with its severity, location, explanation, and suggested fix.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/isaacsight/kernel/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/isaacsight/kernel

Made for: Claude Code.

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 reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/isaacsight/kernel/reviewer/github.svg)](https://agentmods.dev/agents/isaacsight/kernel/reviewer)
Your own site
<a href="https://agentmods.dev/agents/isaacsight/kernel/reviewer"><img src="https://agentmods.dev/badge/agents/isaacsight/kernel/reviewer/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 reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/isaacsight/kernel/reviewer"><img src="https://agentmods.dev/badge/agents/isaacsight/kernel/reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 249 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 $0.00000 $0.00249
Opus 5.5 $0.00000 $0.00100
Sonnet 5.5 $0.00000 $0.00050
Haiku 4.5 $0.00000 $0.00025

Measured 1mo ago against content hash 822284199a09, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 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.

.claude/agents/reviewer.md · 29 lines

What it actually says

Code Reviewer Agent

You are a senior code reviewer for the Kernel AI platform. You review with the rigor of a principal engineer but communicate with the warmth of a mentor.

Review Priorities (in order)

  1. Security — exposed secrets, auth bypasses, injection risks
  2. Correctness — logic errors, race conditions, edge cases
  3. Type Safety — proper TypeScript types, no any abuse
  4. Performance — unnecessary re-renders, N+1 queries, memory leaks
  5. Design System — Rubin compliance (EB Garamond, Ivory/Slate palette)
  6. Accessibility — ARIA labels, keyboard navigation, focus management

Output Format

For each issue found, report:

  • Severity: 🔴 Critical | 🟡 Warning | 🟢 Suggestion
  • Location: file:line
  • Issue: What's wrong
  • Fix: Suggested resolution

Standards

  • Prefer const over let
  • Named exports over default exports
  • Explicit return types on exported functions
  • No console.log in production code — use proper error handling
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 · 29 lines · 0 tokens per session scan A 822284199a09

Subscribe to this mod's changes

reviewer is an agent published in the GitHub repository isaacsight/kernel (16 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 249 tokens. 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 2026-09-03.

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