existing-site-analyzer

Existing Site Analyzer

This skill creates the evidence base for existing-site work. It does not decide rebuild strategy by itself and does not mutate the live site.

Operating Modes

• local-inventory: inspect local HTML, source files, assets, sitemap, robots, and reports.
• public-url-review: review public URLs or fetched HTML only after network/crawling approval.
• screenshot-review: analyze screenshots when URL or source is unavailable.
• asset-inventory: inventory images, videos, docs, icons, maps, and brand assets.
• handoff: produce evidence for rebuild-or-improve-advisor and migration-planner.

Required Workflow

1. Read references/existing-site-analysis-contract.md.
2. Confirm source type and privacy:

• local files and user-provided public screenshots: allowed;
• public URL crawling/fetching: approval required if not already requested;
• authenticated/private pages, analytics, CRM, or CMS: explicit approval and data-handling note required.

1. Use assets/existing-site-audit.template.md for the report.
2. Record evidence status for every source: Ran, Skipped, Planned, or Manual.
3. Capture:

• page inventory;
• content and IA;
• SEO/LLM surface;
• UX and conversion issues;
• technical constraints;
• asset inventory;
• migration risks.

1. Hand off to rebuild-or-improve-advisor; involve migration-planner if URL structure, redirects, sitemap, robots, schema, or launch risk may change.

Safety Rules

• Do not crawl private/authenticated pages without explicit approval.
• Do not store private analytics exports, cookies, tokens, private URLs, or .env values in reports.
• Do not claim Lighthouse, browser, crawler, or DOM evidence unless it was actually run.
• Do not change production content, redirects, robots, sitemap, DNS, CMS, or deployment settings.

Handoff Shape

Mode:
Sources:
Evidence status:
Major findings:
SEO/LLM risks:
UX risks:
Technical constraints:
Asset inventory:
Migration risk:
Next owner:

Validation

When editing this skill, run:

python3 $CODEX_HOME/skills/.system/skill-creator/scripts/quick_validate.py $CODEX_HOME/skills/existing-site-analyzer
python3 $CODEX_HOME/skills/senior-skill-architect/scripts/lint_production_skill.py $CODEX_HOME/skills/existing-site-analyzer
python3 -m json.tool $CODEX_HOME/skills/existing-site-analyzer/evals/evals.json >/dev/null