Phase 0: Credential Preflight (REQUIRED — run BEFORE anything else)

Before running any of the steps below, always invoke the shared preflight check:

~/.claude/skills/seo/scripts/preflight.sh

If exit code is 0: credentials are configured — proceed with the rest of this skill silently.

If exit code is 2: the script prints the DataForSEO setup wizard to stdout. STOP, display that wizard to the user verbatim, and wait for them to paste credentials in this format:

login: their_email@example.com
password: their_api_password_here

When they reply:

1. Parse login: and password: from their message.
2. Write them to ~/.claude/skills/seo/.env:

   DATAFORSEO_LOGIN=<login>
   DATAFORSEO_PASSWORD=<password>
   

3. chmod 600 ~/.claude/skills/seo/.env
4. Run a verification call: ~/.claude/skills/seo/scripts/keyword_research.py volume "test"
5. If verification succeeds (real JSON returned): tell the user "✅ Credentials verified. Running your command now..." and proceed with the original request.
6. If status 40104 — Please verify your account: tell the user to verify their account at https://app.dataforseo.com/, then say "continue" to retry.
7. If any other auth error: ask them to double-check the API password (the long alphanumeric string from https://app.dataforseo.com/api-access — not their account login password).

Never echo credentials back to the user, never include them in tool output, and never commit them.

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Technical SEO Audit Skill

Powered by: DataForSEO API — On-Page instant_pages (single URL) and On-Page task_post + summary + pages (full crawl). Cost: ~$0.05-0.10 per 100-page crawl. Crawl takes 2-5 minutes.

Run

For a single page (instant):

~/.claude/skills/seo/scripts/on_page_audit.py page --url <url>

For a full site crawl (2-5 min for 100 pages):

~/.claude/skills/seo/scripts/on_page_audit.py site --target <domain> --max-crawl-pages 100

Categories to evaluate

Pull from the summary.checks and per-page checks objects:

Indexability & Crawl

• is_4xx_code, is_5xx_code, is_redirect chains > 2 hops
• canonical mismatches
• robots_txt, blocked resources
• is_https, mixed content

On-page meta

• Missing/duplicate <title>, <meta description>
• Title length (should be 50-60 chars), description (140-160)
• h1 missing or duplicate
• Heading hierarchy gaps

Speed & Core Web Vitals

• time_to_interactive, largest_contentful_paint
• cumulative_layout_shift
• Resource errors

Content quality

• plain_text_word_count < 300 = thin content
• plain_text_rate (text vs. HTML)
• automated_readability_index

Structured data

• Schema present? Which types?
• Missing organization / article / breadcrumb / product schema for the site type

Issue priority rubric

Priority	Examples
Critical	5xx errors, no-index on key pages, broken canonical, mixed content, robots.txt blocking
High	Missing titles/descriptions on indexable pages, broken internal links, redirect chains, slow LCP (>4s)
Medium	Duplicate titles/descriptions, missing alt text at scale, thin content (<300 words) on key pages
Low	Heading hierarchy gaps, suboptimal title length, missing schema

Technical Score (0-100)

Start at 100. Subtract:

• 15 per critical issue (max 60)
• 5 per high issue (max 30)
• 1 per medium issue (max 15)
• 0.2 per low issue (max 5)

Floor at 0.

Return JSON shape

{
  "technical_score": 72,
  "crawl_summary": {"pages_crawled": 100, "errors": 8, "warnings": 23},
  "critical_issues": [{"title": "...", "count": 3, "recommendation": "..."}],
  "high_issues": [...],
  "medium_issues": [...]
}