investigate

investigate is a skill for Claude Code from Crawlio-app/crawlio-browser. It costs 32 tokens per session (1,105 once invoked), scanned A, original, Apache-2.0.

A skill for investigating one website across technology, tracking, performance, security, accessibility, and structured data. It gathers evidence and reports findings for each area.

In plain words
What is it for?
Use it to audit a site's frameworks and dependencies, analytics and tracking, performance, security, accessibility, data layer, tables, or JSON-LD.
Why use it?
It puts several website checks into one investigation and records where missing or failed data lowers confidence in a finding.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Good fit Use it to audit a site's frameworks and dependencies, analytics and tracking, performance, security, accessibility, data layer, tables, or JSON-LD.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/crawlio-app/crawlio-browser/investigate
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.

Any agent
npx skills add Crawlio-app/crawlio-browser --skill investigate
Clone the repo
git clone --depth 1 https://github.com/Crawlio-app/crawlio-browser

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 investigate

README.md
[![agentmods](https://agentmods.dev/badge/skills/crawlio-app/crawlio-browser/investigate.svg)](https://agentmods.dev/skills/crawlio-app/crawlio-browser/investigate)
Your own site
<a href="https://agentmods.dev/skills/crawlio-app/crawlio-browser/investigate"><img src="https://agentmods.dev/badge/skills/crawlio-app/crawlio-browser/investigate.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,105 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 $0.00032 $0.01105
Opus 5 $0.00016 $0.00553
Sonnet 5 $0.00006 $0.00221
Haiku 4.5 $0.00003 $0.00111

Measured 8d ago against content hash 3ecb3297524b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

investigate 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 8d 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.

skills/investigate/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Investigate

Deep-dive investigation of a single website. Produces structured findings across technology, tracking, performance, security, accessibility, and data-structure dimensions.

When to Use

  • Audit tech stack, frameworks, third-party dependencies
  • Analyze tracking health (GA4, GTM, FB Pixel) and data layer state
  • Measure performance, security, accessibility
  • Detect structured data (tables, JSON-LD)

Protocol

Acquire -> Normalize -> Analyze with Evidence Mode.

1. Connect

connect_tab({ url: "https://target.com", background: true })

2. Acquire + Normalize

const page = await smart.extractPage();        // 7 parallel ops, typed gaps
const tech = await smart.detectTechnologies();  // fingerprint-based tech detection
const tracking = await smart.parseTrackingPixels();
const validation = await smart.validateTracking();
const dataLayer = await smart.inspectDataLayer();
const tables = await smart.detectTables();
// page.gaps[] tells you what failed — check before trusting supplementary data
// A gap with reducesConfidence:true auto-caps findings in that dimension

Use smart.scrollCapture() when visual evidence is needed.

3. Analyze — produce findings

smart.finding({
  claim: `Site runs ${tech.technologies.length} detected technologies`,
  evidence: tech.technologies.map(t => `${t.name} (${t.confidence})`),
  sourceUrl: page.capture.url, confidence: "high",
  method: "detectTechnologies", dimension: "technology"
});

if (tracking.pixels?.length) {
  smart.finding({
    claim: `${tracking.pixels.length} tracking pixels detected`,
    evidence: tracking.pixels.map(p => `${p.vendor}/${p.pixelId}: ${p.eventCount} fires (${p.uniqueEventNames.join(', ')})`),
    sourceUrl: page.capture.url, confidence: "high",
    method: "parseTrackingPixels", dimension: "tracking"
  });
}

if (validation.issues?.length) {
  smart.finding({
    claim: `${validation.issues.length} tracking validation issues`,
    evidence: validation.issues.map(i => `${i.parameter || i.code}: ${i.message}`),
    sourceUrl: page.capture.url, confidence: "medium",
    method: "validateTracking", dimension: "tracking"
  });
}

if (page.performance) {
  smart.finding({
    claim: `LCP: ${page.performance.webVitals?.lcp || 'n/a'}ms`,
    evidence: [`CLS: ${page.performance.webVitals?.cls}`, `FID: ${page.performance.webVitals?.fid}`],
    sourceUrl: page.capture.url,
    confidence: page.gaps.some(g => g.dimension === "performance") ? "medium" : "high",
    method: "extractPage", dimension: "performance"
  });
}

if (page.security) {
  const protocol = page.security.certificate?.protocol || "unknown";
  smart.finding({
    claim: `Security state: ${page.security.securityState || 'unknown'} (${protocol})`,
    evidence: [
      `mixedContent: ${Boolean(page.security.mixedContent)}`,
      `certificate issuer: ${page.security.certificate?.issuer || 'unavailable'}`
    ],
    sourceUrl: page.capture.url, confidence: "high",
    method: "extractPage", dimension: "security"
  });
}

if (page.accessibility) {
  smart.finding({
    claim: `${page.accessibility.imagesWithoutAlt} images missing alt text`,
    evidence: [`Landmarks: ${page.accessibility.landmarkCount}`, `Nodes: ${page.accessibility.nodeCount}`],
    sourceUrl: page.capture.url, confidence: "high",
    method: "extractPage", dimension: "accessibility"
  });
}

if (tables.length) {
  smart.finding({
    claim: `${tables.length} table-like structures detected`,
    evidence: tables.map(t => `${t.selector}: ${t.score} score`),
    sourceUrl: page.capture.url, confidence: "medium",
    method: "detectTables", dimension: "data-structure"
  });
}

return { findings: smart.findings(), gaps: page.gaps };

Read the full file on GitHub · 126 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. 8d ago First seen · 126 lines · 32 tokens per session scan A 3ecb3297524b

Subscribe to this mod's changes

investigate is a skill published in the GitHub repository Crawlio-app/crawlio-browser (6 stars, last pushed 29d ago), licensed Apache-2.0. It adds 32 tokens to every session and 1,105 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 2026-08-31.

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