30x-seo-redirects

30x-seo-redirects is a skill for Claude Code from norahe0304-art/30x-seo. It costs 55 tokens per session (1,161 once invoked), scanned A, original, MIT.

A website redirect checker for finding broken paths between old and new URLs. It looks for redirect chains, loops, inconsistent protocols, and redirects that no longer lead to a live destination.

In plain words
What is it for?
Use it to audit 301, 302, and 307 redirects, find multi-step chains and loops, identify orphaned redirects, and review migration redirect rules.
Why use it?
It helps prevent slow page loads, wasted search-engine crawling, and lost visibility after URL changes or site migrations.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions CLAUDE.md.

Good fit Use it to audit 301, 302, and 307 redirects, find multi-step chains and loops, identify orphaned redirects, and review migration redirect rules.

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Install with agentmods
npx agentmods add skills/norahe0304-art/30x-seo/30x-seo-redirects
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.

Any agent
npx skills add norahe0304-art/30x-seo --skill 30x-seo-redirects
Clone the repo
git clone --depth 1 https://github.com/norahe0304-art/30x-seo

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 30x-seo-redirects

README.md
[![agentmods](https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-redirects/github.svg)](https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-redirects)
Your own site
<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-redirects"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-redirects/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.

agentmods 80×15 button for 30x-seo-redirects

Your own site · 80×15
<a href="https://agentmods.dev/skills/norahe0304-art/30x-seo/30x-seo-redirects"><img src="https://agentmods.dev/badge/skills/norahe0304-art/30x-seo/30x-seo-redirects.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 55 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,161 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.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00055 $0.01161
Opus 5 $0.00028 $0.00580
Sonnet 5 $0.00011 $0.00232
Haiku 4.5 $0.00006 $0.00116

Measured 12d ago against content hash 97fe1b9a6f65, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

30x-seo-redirects 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/30x-seo-redirects/SKILL.md · 147 lines

How it starts

The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Redirect Audit

What This Skill Does

Analyzes website redirects to find problems that hurt SEO and user experience.

Why Redirects Matter

  • Every redirect = delay: 301 redirects add 100-500ms latency
  • Chains lose link equity: Google follows max ~5 hops, then stops
  • Wrong type = lost ranking: 302 (temporary) doesn't pass full link juice
  • Loops = crawl waste: Googlebot hits loop, gives up, page not indexed

Check Categories

1. Redirect Chains

A redirect pointing to another redirect, pointing to another...

BAD:  /old → /old-2 → /old-3 → /final  (3 hops, slow, loses equity)
GOOD: /old → /final                     (1 hop, fast, full equity)

Rule: Maximum 1 redirect hop. More than 1 = fix immediately.

2. Redirect Loops

Page A redirects to B, B redirects back to A. Infinite loop.

BAD:  /page-a → /page-b → /page-a  (loop!)

Detection: Follow redirects up to 10 hops. If same URL appears twice = loop.

3. Redirect Type Audit

Type When to Use SEO Impact
301 Permanent move Passes ~95% link equity
302 Temporary (A/B test, maintenance) Passes less equity, can cause issues if permanent
307 Temporary (preserves HTTP method) Same as 302
308 Permanent (preserves HTTP method) Same as 301
Meta refresh NEVER for SEO Bad UX, slow, not recommended
JavaScript redirect Avoid if possible Googlebot may not follow

Rule: Permanent moves must use 301 or 308. Using 302 for permanent = error.

4. Protocol Issues

BAD:  https://site.com → http://site.com  (downgrade, security warning)
BAD:  http → https → http                 (mixed, confusing)
GOOD: http://site.com → https://site.com  (upgrade, correct)

5. Domain Consistency

BAD:  www.site.com → site.com → www.site.com  (inconsistent)
GOOD: Pick ONE (www or non-www) and redirect all others to it

6. Trailing Slash Consistency

BAD:  /page → /page/ → /page  (loop risk)
GOOD: Pick ONE pattern (/page or /page/) and redirect all others

Read the full file on GitHub · 147 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.

  1. 12d ago First seen · 147 lines · 55 tokens per session scan A 97fe1b9a6f65

Subscribe to this mod's changes

30x-seo-redirects is a skill published in the GitHub repository norahe0304-art/30x-seo (51 stars, last pushed 6mo ago), licensed MIT. It adds 55 tokens to every session and 1,161 once invoked, about $0.0003 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.

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