seo-drift

seo-drift is an agent for Claude Code from AgriciDaniel/seo-os. It costs 45 tokens per session (600 once invoked), scanned A, original, AGPL-3.0.

A comparison of saved SEO page baselines with newer page versions. A baseline is a recorded reference state for important page elements.

In plain words
What is it for?
It checks a URL against an existing baseline, detects changes to SEO-critical elements, and classifies their severity.
Why use it?
It helps find SEO changes that may cause search-performance problems after updates. It reports the changes and how serious they are.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit It checks a URL against an existing baseline, detects changes to SEO-critical elements, and classifies their severity.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/agricidaniel/seo-os/seo-drift
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/AgriciDaniel/seo-os

Made for: Claude Code.

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.

agentmods badge for seo-drift

README.md
[![agentmods](https://agentmods.dev/badge/agents/agricidaniel/seo-os/seo-drift.svg)](https://agentmods.dev/agents/agricidaniel/seo-os/seo-drift)
Your own site
<a href="https://agentmods.dev/agents/agricidaniel/seo-os/seo-drift"><img src="https://agentmods.dev/badge/agents/agricidaniel/seo-os/seo-drift.svg" alt="Measured on agentmods" 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 unknown 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.

ModelPer sessionOnce 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 7d ago against content hash 7a8628b7bb0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, 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 7d 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
vendored/claude-seo/agents/seo-drift.md · 60 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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.

  1. 7d 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 AgriciDaniel/seo-os (121 stars, last pushed 2mo ago), licensed AGPL-3.0. 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). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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