technical-seo

technical-seo is a skill for Claude Code from MartinOlivero/saas-builder. It costs 135 tokens per session (933 once invoked), scanned A, original, MIT.

A set of web-discovery improvements for apps and SaaS products, including search metadata, social previews, sitemaps, crawler instructions, and structured data. It also addresses React single-page apps whose page content appears only after JavaScript runs.

In plain words
What is it for?
Use it to add per-page metadata, Open Graph previews, sitemaps, robots.txt, structured data, or server-side and prerendered content for a React app.
Why use it?
It helps search engines and social networks understand pages that would otherwise look empty or lack a useful sharing preview. It makes public pages easier to index and share.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the saas-builder plugin — 18 skills, 1 hook shipped together

Good fit Use it to add per-page metadata, Open Graph previews, sitemaps, robots.txt, structured data, or server-side and prerendered content for a React app.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/martinolivero/saas-builder/technical-seo
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 MartinOlivero/saas-builder --skill technical-seo
Clone the repo
git clone --depth 1 https://github.com/MartinOlivero/saas-builder

Made for: Claude Code.

Or install saas-builder, the plugin that ships this one along with the rest of its 18 skills, 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.

agentmods badge for technical-seo

README.md
[![agentmods](https://agentmods.dev/badge/skills/martinolivero/saas-builder/technical-seo/github.svg)](https://agentmods.dev/skills/martinolivero/saas-builder/technical-seo)
Your own site
<a href="https://agentmods.dev/skills/martinolivero/saas-builder/technical-seo"><img src="https://agentmods.dev/badge/skills/martinolivero/saas-builder/technical-seo/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 technical-seo

Your own site · 80×15
<a href="https://agentmods.dev/skills/martinolivero/saas-builder/technical-seo"><img src="https://agentmods.dev/badge/skills/martinolivero/saas-builder/technical-seo.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 135 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 933 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 $0.00135 $0.00933
Opus 5 $0.00068 $0.00466
Sonnet 5 $0.00027 $0.00187
Haiku 4.5 $0.00014 $0.00093

Measured 8d ago against content hash 28398576d945, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

technical-seo 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 8d 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/technical-seo/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Technical SEO

This skill makes a SaaS findable by Google and shareable on social — and fixes the specific trap of a Vite SPA serving near-empty HTML that crawlers can't read.

Analogy: an SPA is a book with a blank cover and blank first page until you open it and read aloud. Search crawlers and social bots only glance at the cover — if it's blank, they walk away. SEO here is printing a real cover (server-rendered head tags) so they see what the book is about.

The SPA problem (state it upfront)

A Vite SPA serves near-empty HTML; content and meta tags appear only after JS runs. Social crawlers (WhatsApp, Twitter, LinkedIn) don't run JS at all, and Googlebot does so unreliably. So SEO tags must be injected server-side or prerendered — client-only react-helmet alone won't show a preview on WhatsApp.

Discovery (max 3 questions, only if unknown)

  1. Which pages need SEO — public marketing/landing/pricing, or also app routes?
  2. Is the broken thing indexing (Google) or social previews (no image on share)?
  3. Can you prerender marketing routes to static HTML, or must it stay a pure SPA?

Step 1 — Per-page head tags

Use react-helmet-async to set per route: unique <title>, <meta name="description">, a canonical link, and OpenGraph + Twitter Card tags:

  • og:title, og:description, og:image (1200×630), og:url, twitter:card=summary_large_image.
  • Always absolute URLs in og:image/canonical (relative URLs break previews).
  • Set <html lang> and one canonical per page to avoid duplicate-content issues.

Step 2 — Make crawlers actually see them (the high-impact fix)

  • Marketing/landing routes → prerender to static HTML with vite-ssg (or React SSR). Crawlers get real content + OG tags in the initial response. This is the single highest-impact change.
  • Pure CSR SPA, OG tags only → the "OG proxy" pattern: a Vercel function + vercel.json rewrite that detects social/bot user-agents and serves HTML with the correct meta injected.

Read the full file on GitHub · 59 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. 8d ago First seen · 59 lines · 135 tokens per session scan A 28398576d945

Subscribe to this mod's changes

technical-seo is a skill published in the GitHub repository MartinOlivero/saas-builder (2 stars, last pushed 20d ago), licensed MIT. It adds 135 tokens to every session and 933 once invoked, about $0.0007 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 2026-08-31.