smoke-sonnet

smoke-sonnet is an agent for Claude Code from yacb2/aidex. It costs 105 tokens per session (669 once invoked), scanned A, original, MIT.

A browser-based smoke-test agent that walks through one user flow as one user and reports whether each step passes. A smoke test is a short check that the main path of an application still works.

In plain words
What is it for?
Use it to test a numbered flow such as signing in, navigating, submitting a form, or checking permissions, with a separate result for each step.
Why use it?
It catches broken steps, refused requests, and unexpected results in the running app rather than only in source code or isolated tests.

Agent for Claude Code

Written for Claude Code: user-invocable in frontmatter. Also seen: model in frontmatter.

Part of the aidex plugin — 22 skills, 34 agents, 5 hooks shipped together

Good fit Use it to test a numbered flow such as signing in, navigating, submitting a form, or checking permissions, with a separate result for each step.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/yacb2/aidex/smoke-sonnet
View source ↗ yacb2/aidex
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/yacb2/aidex

Made for: Claude Code.

Or install aidex, the plugin that ships this one along with the rest of its 22 skills, 34 agents, 5 hooks.

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 smoke-sonnet

README.md
[![agentmods](https://agentmods.dev/badge/agents/yacb2/aidex/smoke-sonnet/github.svg)](https://agentmods.dev/agents/yacb2/aidex/smoke-sonnet)
Your own site
<a href="https://agentmods.dev/agents/yacb2/aidex/smoke-sonnet"><img src="https://agentmods.dev/badge/agents/yacb2/aidex/smoke-sonnet/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 smoke-sonnet

Your own site · 80×15
<a href="https://agentmods.dev/agents/yacb2/aidex/smoke-sonnet"><img src="https://agentmods.dev/badge/agents/yacb2/aidex/smoke-sonnet.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 105 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 669 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 $0.00105 $0.00669
Opus 5.5 $0.00042 $0.00268
Sonnet 5.5 $0.00021 $0.00134
Haiku 4.5 $0.00011 $0.00067

Measured 3d ago against content hash 38aa67386881, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

smoke-sonnet 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 3d 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/smoke-sonnet.md · 18 lines

What it actually says

Smoke walker

Requires the chrome-devtools MCP server: its tools are named in this agent's tools: list, and without the server you have only Bash and Read and cannot walk anything - say so and stop.

You receive a base URL, one persona, numbered steps each with what must hold, a viewport and a screenshot directory. Open the walk in a NEW isolated browser context (new_page with isolatedContext) and log in through the form as the persona: a page that is already logged in is another walk's session, never a login. Close any modal that opens over the app (what's-new, onboarding) and say which one you closed, then walk the steps in order. Check each expectation against the rendered DOM (compact snapshots, evaluate_script), the console and the network: a step that should be refused is checked at both the UI and the HTTP status of its request.

Return one table: step, expected, observed (with the request and status when one is involved), PASS or FAIL. Save a screenshot with filePath only for a FAIL or a visual doubt; never return image content. Anything that looks wrong on screen but is not a stated expectation (overlap, overflow, clipped text, contrast) goes in a separate "Visual doubts for aidex:verify-browser-opus" list with its screenshot path: never mark it PASS and never judge it yourself.

Do not change application code or data beyond what the steps require. A step you cannot perform is BLOCKED with the reason, not skipped. Leave the last page open when you finish.

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. 3d ago First seen · 18 lines · 105 tokens per session scan A 38aa67386881

Subscribe to this mod's changes

smoke-sonnet is an agent published in the GitHub repository yacb2/aidex (2 stars, last pushed today), licensed MIT. It adds 105 tokens to every session and 669 once invoked, about $0.0004 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 2026-10-13.

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