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.
npx skills add ncklrs/claude-chrome-user-testing --skill critical-pathsgit clone --depth 1 https://github.com/ncklrs/claude-chrome-user-testingWrote 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/skills/ncklrs/claude-chrome-user-testing/critical-paths)<a href="https://agentmods.dev/skills/ncklrs/claude-chrome-user-testing/critical-paths"><img src="https://agentmods.dev/badge/skills/ncklrs/claude-chrome-user-testing/critical-paths/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/skills/ncklrs/claude-chrome-user-testing/critical-paths"><img src="https://agentmods.dev/badge/skills/ncklrs/claude-chrome-user-testing/critical-paths.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 | $0.00000 | $0.01973 |
| Opus 5 | $0.00000 | $0.00986 |
| Sonnet 5 | $0.00000 | $0.00395 |
| Haiku 4.5 | $0.00000 | $0.00197 |
Grade A, and why
critical-paths 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 335 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Critical Paths Skill
Test must-work user journeys defined in project configuration. Critical paths are essential flows that must always function correctly.
What is a Critical Path?
A critical path is a user journey that:
- Must work for the site/app to be usable
- Represents core business functionality
- Would cause significant harm if broken
- Should be tested before every deployment
Examples of Critical Paths
| Site Type | Critical Paths |
|---|---|
| E-commerce | Purchase flow, Account creation, Cart |
| SaaS | Signup, Login, Core feature usage |
| Content | Navigation, Search, Article viewing |
| Banking | Login, Transfer, Balance check |
Path Definition Schema
Full Schema
{
"paths": [
{
"name": "string (required)",
"description": "string (required)",
"persona": "persona-id (required)",
"priority": "critical|high|medium|low (optional, default: high)",
"timeout": "number in seconds (optional, default: 120)",
"steps": [
{
"action": "navigate|task|verify|wait|input",
"...action-specific fields"
}
],
"onFailure": "continue|stop (optional, default: continue)"
}
]
}
Step Actions
navigate
Navigate to a URL path.
{
"action": "navigate",
"to": "/path",
"waitFor": "load|networkidle (optional)"
}
task
Perform a task using the persona's behavior.
{
"action": "task",
"do": "description of task to perform",
"timeout": 30
}
verify
Verify something exists or is true.
// Verify element exists
{ "action": "verify", "element": "description of element" }
// Verify text appears
{ "action": "verify", "text": "exact text to find" }
// Verify URL matches
{ "action": "verify", "url": "/expected-path" }
// Verify URL contains
{ "action": "verify", "urlContains": "confirmation" }
wait
Wait for a condition.
// Wait for seconds
{ "action": "wait", "seconds": 2 }
// Wait for element
{ "action": "wait", "for": "element description" }
// Wait for navigation
{ "action": "wait", "for": "page load" }
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.
- 10d ago First seen · 335 lines · 0 tokens per session scan A 915bfbdf2d35
critical-paths is a skill published in the GitHub repository ncklrs/claude-chrome-user-testing (19 stars, last pushed 8mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,973 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 2026-08-30.
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