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.
npx skills add joaoguirunas/team-os --skill seo-driftgit clone --depth 1 https://github.com/joaoguirunas/team-osWrote 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.
[](https://agentmods.dev/skills/joaoguirunas/team-os/seo-drift)<a href="https://agentmods.dev/skills/joaoguirunas/team-os/seo-drift"><img src="https://agentmods.dev/badge/skills/joaoguirunas/team-os/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.
<a href="https://agentmods.dev/skills/joaoguirunas/team-os/seo-drift"><img src="https://agentmods.dev/badge/skills/joaoguirunas/team-os/seo-drift.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00070 | $0.01946 |
| Opus 5.5 | $0.00028 | $0.00778 |
| Sonnet 5.5 | $0.00014 | $0.00389 |
| Haiku 4.5 | $0.00007 | $0.00195 |
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 20d 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.
- **No curl, no subprocess HTTP calls** -- only the project's validated fetch pipeline This is a copy
88% identical to seo-drift — 35 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.
How it starts
The opening of the file, as written. The whole thing — 217 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SEO Drift Monitor (April 2026)
Git for your SEO. Capture baselines, detect regressions, track changes over time.
Commands
| Command | Purpose |
|---|---|
/seo drift baseline <url> |
Capture current SEO state as a "known good" snapshot |
/seo drift compare <url> |
Compare current page state to stored baseline |
/seo drift history <url> |
Show change history and past comparisons |
What It Captures
Every baseline records these SEO-critical elements:
| Element | Field | Source |
|---|---|---|
| Title tag | title |
parse_html.py |
| Meta description | meta_description |
parse_html.py |
| Canonical URL | canonical |
parse_html.py |
| Robots directives | meta_robots |
parse_html.py |
| H1 headings | h1 (array) |
parse_html.py |
| H2 headings | h2 (array) |
parse_html.py |
| H3 headings | h3 (array) |
parse_html.py |
| JSON-LD schema | schema (array) |
parse_html.py |
| Open Graph tags | open_graph (dict) |
parse_html.py |
| Core Web Vitals | cwv (dict) |
pagespeed_check.py |
| HTTP status code | status_code |
fetch_page.py |
| HTML content hash | html_hash (SHA-256) |
Computed |
| Schema content hash | schema_hash (SHA-256) |
Computed |
How Comparison Works
The comparison engine applies 17 rules across 3 severity levels. Load
references/comparison-rules.md for the full rule set with thresholds,
recommended actions, and cross-skill references.
Severity Levels
| Level | Meaning | Response Time |
|---|---|---|
| CRITICAL | SEO-breaking change, likely traffic loss | Immediate |
| WARNING | Potential impact, needs investigation | Within 1 week |
| INFO | Awareness only, may be intentional | Review at convenience |
Storage
All data is stored locally in SQLite:
~/.cache/claude-seo/drift/baselines.db
Tables
- baselines: Captured snapshots with all SEO elements
- comparisons: Diff results with triggered rules and severities
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 20d ago Changed · -3 lines · -16 tokens per session f33765a472d9
- 25d ago First seen · 220 lines · 86 tokens per session scan A db92721d6e8a
seo-drift is a skill published in the GitHub repository joaoguirunas/team-os (4 stars, last pushed 2d ago), licensed MIT. It adds 70 tokens to every session and 1,946 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 88% identical to seo-drift, differing in 35 lines, and is treated as a copy.
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