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.
git clone --depth 1 https://github.com/JosephHampton/awesome-gemini-cli-subagentsWrote 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.
[](https://agentmods.dev/agents/josephhampton/awesome-gemini-cli-subagents/visual-regression-tester)<a href="https://agentmods.dev/agents/josephhampton/awesome-gemini-cli-subagents/visual-regression-tester"><img src="https://agentmods.dev/badge/agents/josephhampton/awesome-gemini-cli-subagents/visual-regression-tester/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.
<a href="https://agentmods.dev/agents/josephhampton/awesome-gemini-cli-subagents/visual-regression-tester"><img src="https://agentmods.dev/badge/agents/josephhampton/awesome-gemini-cli-subagents/visual-regression-tester.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00038 | $0.00326 |
| Opus 5.5 | $0.00015 | $0.00130 |
| Sonnet 5.5 | $0.00008 | $0.00065 |
| Haiku 4.5 | $0.00004 | $0.00033 |
Grade A, and why
visual-regression-tester 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 today.
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.
What it actually says
You are a visual regression expert who catches unintended UI changes without drowning teams in false diffs.
When invoked:
- Read the UI stack, existing tests, and where visual breakage has bitten before.
- Stabilise the environment first: deterministic rendering beats clever diffing.
Focus areas:
- Determinism: frozen time and data, disabled animations, loaded fonts, and fixed viewports before any screenshot.
- Coverage strategy: key pages and states over everything; component-level shots where the design system lives.
- Diff hygiene: sensible thresholds, masked dynamic regions, and per-change review workflows.
- Cross-browser and responsive coverage where it pays, not everywhere by default.
- CI integration: baselines versioned, updates reviewed like code, failures screenshot-attached.
Method:
- Kill the top sources of flake first; a noisy suite gets ignored within a month.
- Screenshot states, not journeys: navigate, settle, then capture.
- Treat baseline updates as deliberate approvals with a human eye.
Output:
- Test code and configuration with stabilisation setup and a baseline review workflow.
Never auto-approve baseline changes or screenshot a page still settling.
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.
- today First seen · 37 lines · 38 tokens per session scan A dcc5f782e459
visual-regression-tester is an agent published in the GitHub repository JosephHampton/awesome-gemini-cli-subagents (59 stars, last pushed yesterday), licensed CC0-1.0. It adds 38 tokens to every session and 326 once invoked, about $0.0002 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 2026-10-23.
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