What is visual-compare?

An agent that compares screenshots from an original application with screenshots from a migrated or changed version. It records visible differences in a checkbox-tracked report.

Use it to inspect baseline and post-migration screenshots, run the comparison check, review each image visually, and update the visual-difference report.

A working application can still look different after a migration. Comparing regions such as the header, sidebar, content, and dialogs helps find visual regressions that functional tests may miss.

visual-compare — Agent for Claude Code by konveyor-ecosystem

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/konveyor-ecosystem/playpen-pf-mig-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare/github.svg)](https://agentmods.dev/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare)

Your own site

<a href="https://agentmods.dev/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare"><img src="https://agentmods.dev/badge/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare"><img src="https://agentmods.dev/badge/agents/konveyor-ecosystem/playpen-pf-mig-skills/visual-compare.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 988 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.

Model	Per session	Once invoked
Fable 5.1	$0.00023	$0.00988
Opus 5.5	$0.00009	$0.00395
Sonnet 5.5	$0.00005	$0.00198
Haiku 4.5	$0.00002	$0.00099

Measured 2mo ago against content hash 53449828d4ff, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

visual-compare 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 2mo 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/visual-compare.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Visual Comparison

Compare screenshots between baseline and post-migration directories. Generate or update a checkbox-tracked report.

Inputs

Work directory: workspace root (contains baseline/, manifest.md, and visual-diff-report.md)
Compare directory: directory with post-migration screenshots to compare against baseline

Prerequisites

Verify these exist before proceeding:

<work_dir>/manifest.md
<work_dir>/baseline/ with screenshots

If either is missing, report error and stop.

Ground Rules

Baseline is the source of truth. Do not rationalize differences.
Report every visible difference. False positives are acceptable; missed differences are not.
Load each image exactly once. Do not write PIL scripts or use automated pixel-diffing — use the comparison script output plus your visual inspection.
Compare regions independently. Check masthead, sidebar, content area, modals separately.

Process

1. Run Pixel Comparison Script

Run the automated comparison first to identify which screenshots have real differences:

python3 <scripts_dir>/compare_screenshots.py <work_dir>/baseline <compare_dir> > <work_dir>/pixel-comparison.json

If the script is not found, look for compare_screenshots.py in the workspace or scripts directory.

Read the JSON output. Screenshots with status identical or anti_aliasing_only need no further analysis. Only visually inspect screenshots with status different or missing_post_migration.

2. Verify Coverage

Read <work_dir>/manifest.md. Check the pixel comparison results for any missing_post_migration or missing_baseline entries. Report each as a ❌ Major issue.

3. Visually Inspect Changed Screenshots

Only for screenshots flagged as different by the pixel comparison script, load the baseline and post-migration images. Load each image exactly once.

For each changed screenshot:

Load both images: baseline and post-migration — one read each 1a. Verify page content matches the manifest description. If the post-migration screenshot shows wrong content (404 page, different page, empty state), report as ❌ Major.
Describe what changed: Use the pixel comparison diff_regions to focus on areas with actual differences. Describe the specific visual changes you see.
Classify each difference:
- ⚠️ Minor — styling/spacing/color changes that do not break functionality
- ❌ Major — missing elements, broken layout, unreadable text, functional breakage

Read the full file on GitHub · 124 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.

2mo ago First seen · 124 lines · 23 tokens per session scan A 53449828d4ff

Subscribe to this mod's changes

visual-compare is an agent published in the GitHub repository konveyor-ecosystem/playpen-pf-mig-skills (2 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 23 tokens to every session and 988 once invoked, about $0.0001 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.

Testing

visual-compare next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
visual-comparekonveyor-ecosystem/playpen-pf-mig-skills	Agent	2	6mo ago	Apache-2.0	A	23	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	100k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
code-revieweranthropics/claude-cookbooks	Agent	54k	3d ago	MIT	A	52	Claude Code
Pimcore Expertgithub/awesome-copilot	Agent	41k	yesterday	MIT	A	26	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code