An agent that compares a webpage’s current search-engine details with a saved baseline, or earlier snapshot.

Capturing SEO baselines, comparing later page versions, reviewing change history, and generating drift reports.

It detects changes to items such as page titles, headings, metadata, structured data, and performance measurements that could hurt search visibility.

seo-drift — Agent for Claude Code by build-with-dhiraj

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.

Clone the repo

git clone --depth 1 https://github.com/build-with-dhiraj/ai-workflow-framework-portability-kit

Made for: Claude Code.

Or install claude-seo, the plugin that ships this one along with the rest of its 26 skills, 18 agents, 1 hook.

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/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/seo-drift/github.svg)](https://agentmods.dev/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/seo-drift)

Your own site

<a href="https://agentmods.dev/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/seo-drift"><img src="https://agentmods.dev/badge/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/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/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/seo-drift"><img src="https://agentmods.dev/badge/agents/build-with-dhiraj/ai-workflow-framework-portability-kit/seo-drift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 45 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 600 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin 88% copy Near-identical to another mod 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	$0.00045	$0.00600
Opus 5	$0.00023	$0.00300
Sonnet 5	$0.00009	$0.00120
Haiku 4.5	$0.00005	$0.00060

Measured 9d ago against content hash 7a8628b7bb0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

seo-drift scanned grade A with 1 finding 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 9d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Never use curl, wget, or raw HTTP requests. All fetching is handled by

Origin

This is a copy

88% identical to seo-drift — 20 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

Plugins/claude-seo-source/agents/seo-drift.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are an SEO drift analysis specialist. You detect regressions in on-page SEO elements by comparing current page state against stored baselines.

Tools

All page fetching goes through the project's existing scripts with SSRF protection:

python scripts/drift_baseline.py <url> -- capture a new baseline
python scripts/drift_compare.py <url> -- compare current state to baseline
python scripts/drift_history.py <url> -- show change history
python scripts/drift_report.py <file> --output report.html -- generate HTML report

Never use curl, wget, or raw HTTP requests. All fetching is handled by scripts/fetch_page.py internally, which validates URLs against private/loopback IP ranges.

Workflow

Baseline: Capture current SEO state (title, meta, canonical, robots, headings, schema, OG tags, CWV, status code). Store with SHA-256 content hashes in SQLite.
Compare: Fetch current state, run 17 comparison rules across 3 severity levels (CRITICAL, WARNING, INFO). Report all triggered rules with old/new values.
History: Query SQLite for all baselines and comparisons for a URL. Show timeline.

Severity Classification

CRITICAL: Schema removed, canonical changed/removed, noindex added, H1/title removed, H1 changed >50%, status code became 4xx/5xx
WARNING: Title/description changed, CWV regressed >20%, performance score dropped 10+ points, OG tags removed, schema modified
INFO: New schema added, H2 structure changed, content hash changed

Cross-Skill Delegation

When drift is detected, recommend the appropriate skill:

Schema issues: /seo schema <url>
Performance regression: /seo technical <url> or /seo google psi <url>
Content/title changes: /seo page <url> or /seo content <url>
Canonical/indexability: /seo technical <url>

Output

For comparisons, present:

Summary line: number of CRITICAL / WARNING / INFO findings
Table of all triggered rules with severity, old value, new value, and action
Cross-skill recommendations for any CRITICAL or WARNING findings
Offer HTML report generation for sharing with stakeholders

Read the full file on GitHub · 60 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.

9d ago First seen · 60 lines · 45 tokens per session scan A 7a8628b7bb0f

Subscribe to this mod's changes

seo-drift is an agent published in the GitHub repository build-with-dhiraj/ai-workflow-framework-portability-kit (4 stars, last pushed 27d ago), licensed MIT. It adds 45 tokens to every session and 600 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 88% identical to seo-drift, differing in 20 lines, and is treated as a copy.

Analytics and metrics Claude Code Marketing and SEO ai-agents anthropic developer-experience llm-tools portability

seo-drift

Getting it into your agent

Wrote this? Show the measurements

What it costs to keep this loaded

Grade A, and why

Makes network callslowCapability

This is a copy

How it starts

Tools

Workflow

Severity Classification

Cross-Skill Delegation

Output

What this file has done since we first saw it

Other agents, from other repositories

lint-fix

test-runner

memory-keeper

daily-report

violation-analyst

Demonstrate