A command-line tool that saves local SQLite snapshots of a website and compares later versions for SEO-related changes.

Use it to create a website baseline, compare the live site with that baseline, and review a history of detected changes.

It helps catch accidental changes to titles, headings, structured data, links, and crawler settings after a deployment.

seo-drift — Skill for Claude Code by seoskillsai

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo

git clone --depth 1 https://github.com/seoskillsai/seo-skills-ai

agentmods

npx agentmods add skills/seoskillsai/seo-skills-ai/seo-drift

Made for: Claude Code.

Or install seo-skills, the plugin that ships this one along with the rest of its 27 skills, 2 hooks, 1 MCP server.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/seoskillsai/seo-skills-ai/seo-drift/github.svg)](https://agentmods.dev/skills/seoskillsai/seo-skills-ai/seo-drift)

Your own site

<a href="https://agentmods.dev/skills/seoskillsai/seo-skills-ai/seo-drift"><img src="https://agentmods.dev/badge/skills/seoskillsai/seo-skills-ai/seo-drift/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/seoskillsai/seo-skills-ai/seo-drift"><img src="https://agentmods.dev/badge/skills/seoskillsai/seo-skills-ai/seo-drift.svg" alt="Reviewed on agentmods" width="80" 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 406 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. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

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.

Model	Per session	Once invoked
Fable 5.1	$0.00032	$0.00406
Opus 5	$0.00016	$0.00203
Sonnet 5	$0.00006	$0.00081
Haiku 4.5	$0.00003	$0.00041

Measured 12d ago against content hash cf3cf1093ecf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

seo-drift 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 12d 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/seo-drift/SKILL.md · 53 lines

What it actually says

SEO Drift Monitoring with SQLite Baselines

Tracks subtle code regressions, accidental metadata deletions, and content drift across production deployments.

🗄️ CLI Commands

# Capture new baseline snapshot in local SQLite database
python scripts/drift_baseline.py --url "https://example.com"

# Compare live site against latest baseline
python scripts/drift_compare.py --url "https://example.com"

# View drift change history
python scripts/drift_history.py --url "https://example.com"

⚖️ The 17 Drift Comparison Rules (3 Severity Levels)

P0 (Critical / Blocker):
1. Title tag missing or changed >50%
2. Meta robots changed to noindex or nofollow
3. Canonical tag modified or removed
4. H1 tag deleted or altered
5. JSON-LD schema syntax invalid or removed
P1 (High): 6. Word count decreased by >20% 7. Key H2/H3 headings removed 8. Primary internal link conduits broken 9. robots.txt AI crawler permissions changed 10. llms.txt feed missing or modified
P2 (Medium / Informational): 11. Meta description updated 12. Image alt text modified 13. OpenGraph tags changed 14. Secondary schema properties adjusted 15. HTML size variance >30% 16. Minor CSS class changes on centerpiece fold 17. Outbound external links modified

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.

12d ago First seen · 53 lines · 32 tokens per session scan A cf3cf1093ecf

Subscribe to this mod's changes

seo-drift is a skill published in the GitHub repository seoskillsai/seo-skills-ai (15 stars, last pushed 2d ago), licensed MIT. It adds 32 tokens to every session and 406 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 2026-08-30.

Analytics and metrics Claude Code Marketing and SEO agent-skills codex cursor mcp seo

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