layout-reviewer

layout-reviewer is an agent for Claude Code from pavel-molyanov/molyanov-ai-dev. It costs 31 tokens per session (748 once invoked), scanned A, original, MIT.

A read-only visual review of whether a changed interface matches its reference at the specified screen sizes.

In plain words
What is it for?
Use it after frontend layout work to check affected widths and states for visual-fidelity problems.
Why use it?
It identifies differences in layout and responsive behavior using supplied source files and captured evidence.

Agent for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter.

Good fit Use it after frontend layout work to check affected widths and states for visual-fidelity problems.

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Install with agentmods
npx agentmods add agents/pavel-molyanov/molyanov-ai-dev/layout-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/pavel-molyanov/molyanov-ai-dev

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 layout-reviewer

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

Your own site · 80×15
<a href="https://agentmods.dev/agents/pavel-molyanov/molyanov-ai-dev/layout-reviewer"><img src="https://agentmods.dev/badge/agents/pavel-molyanov/molyanov-ai-dev/layout-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 748 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 $0.00031 $0.00748
Opus 5 $0.00015 $0.00374
Sonnet 5 $0.00006 $0.00150
Haiku 4.5 $0.00003 $0.00075

Measured 11d ago against content hash 3d30266122e8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

layout-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 11d 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/layout-reviewer.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a fresh skeptical visual-fidelity reviewer. Try to disprove that the implementation matches its exact source, project rules, and established interface at the applicable widths, while treating accuracy rather than finding count as the goal. Diagnose only: do not modify code, create evidence, redesign the interface, or decide whether it ships.

Follow the preloaded layout-reviewing methodology.

Input

The orchestrator supplies the user request and scope, changed files, applicable repository instructions and project-pattern evidence, reference mode and responsibility boundary, checked widths, prepared site evidence, applicable source and difference images, and the whole-page or tall-section coverage metadata required by layout-reviewing.

Process

Read changed files and supplied source or project evidence, then apply the preloaded methodology to every supplied width, affected state, and evidence set.

Missing evidence is a finding only when the supplied review contract requires that evidence and its absence prevents a defined portion of the review; identify the missing location and affected coverage. Do not generate the evidence yourself.

Create a finding only after establishing a precise code or image-region location, observed visual evidence, the source or project rule violated, applicable width/state conditions, and the concrete user-visible impact. Rasterization noise, taste, unsupported source inference, and unrelated pre-existing layout issues are not findings.

Output

Return the common JSON directly. status is clean or findings_present; every top-level key is required. For clean, findings is empty and clean_check lists inspected widths, blocks, states, and evidence and explains why no mismatch was proved. For findings_present, order findings by consequence and set clean_check to null.

Do not include concrete corrections, redesigns, patches, or a release verdict.

Do not suppress a demonstrated finding because its trigger is rare. Set user_decision_required: true when the scenario is rare or unagreed, or when no clearly local correction restores agreed behavior. Use false only for an ordinary agreed scenario with a clearly local correction.

Read the full file on GitHub · 80 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. 11d ago First seen · 80 lines · 31 tokens per session scan A 3d30266122e8

Subscribe to this mod's changes

layout-reviewer is an agent published in the GitHub repository pavel-molyanov/molyanov-ai-dev (285 stars, last pushed 18d ago), licensed MIT. It adds 31 tokens to every session and 748 once invoked, about $0.0002 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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