SEO Drift Monitor

What it does

When your agent uses it

• Capturing an SEO baseline before a site deployment
• Checking whether a release broke titles, canonicals or schema
• Reviewing the history of SEO changes on a page

Example prompts

• “Capture an SEO baseline for https://example.com/pricing before we deploy.”
• “Compare the pricing page to its baseline and show anything that broke.”
• “Show the SEO change history for our homepage.”

Requirements

• The claude-seo plugin scripts that fetch and parse pages
• Network access to the pages you monitor

Workflow steps

6 steps, taken from the first numbered list in SKILL.md.

1. 1Validate URL (SSRF protection via google_auth.validate_url())
2. 2Fetch page via "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run fetch_page.py
3. 3Parse HTML via "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run parse_html.py
4. 4Optionally fetch CWV via "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run pagespeed_check.py (use --skip-cwv to skip)
5. 5Hash HTML body and schema content (SHA-256)
6. 6Store snapshot in SQLite

What it can do on your machine

Read from SKILL.md and the folder at commit 4b99de2. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

SEO Drift Monitor loads about 1.9k tokens when it runs, and up to ~3.3k if it reads all its reference files. Until then it costs about 94 tokens; SKILL.md has 653 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~94

When it runs · the whole SKILL.md, loaded when a task matches

~1.9k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~3.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from AgriciDaniel/claude-seo at commit 4b99de2, republished under its MIT licence (© AgriciDaniel). 653 words, ~1,853 tokens.

name

seo-drift

description

SEO drift monitoring: capture baselines of SEO-critical elements, detect changes, and track regressions over time. Git for SEO: baseline, diff, and track changes to your on-page SEO. Use when user says "SEO drift", "baseline", "track changes", "did anything break", "SEO regression", "compare SEO", "before and after", "monitor SEO changes", or "deployment check".

user-invocable

true

argument-hint

baseline|compare|history <url>

license

MIT

metadata.author

AgriciDaniel

metadata.original_author

Dan Colta (Pro Hub Challenge)

metadata.version

2.4.2

metadata.category

seo

~/.cache/claude-seo/drift/baselines.db

"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_baseline.py <url>
"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_baseline.py <url> --skip-cwv

"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_compare.py <url>
"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_compare.py <url> --baseline-id 5
"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_compare.py <url> --skip-cwv

"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_report.py <comparison_json_file> --output drift-report.html

"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_history.py <url>
"${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run drift_history.py <url> --limit 10

/seo drift baseline https://example.com     # Before deploy
# ... deploy happens ...
/seo drift compare https://example.com      # After deploy

/seo drift baseline https://example.com     # Initial capture
# ... weeks later ...
/seo drift compare https://example.com      # Check for drift
/seo drift history https://example.com      # Review all changes

/seo drift compare https://example.com      # What changed?
/seo drift history https://example.com      # When did it change?

© AgriciDaniel, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in skills/seo-drift of AgriciDaniel/claude-seo.

• SKILL.md
• references/comparison-rules.md

Open the folder on GitHubat commit 4b99de2

Used in 1 other repository

We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in AgriciDaniel/claude-seo, which our catalogue first saw on October 7, 2026.

• hashgraph-online/awesome-codex-pluginsplugins/avalonreset/seo-dungeon/skills/seo-drift