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optimise-seo

Use when asked to make a Next.js App Router app crawlable, indexable, and search-optimized for sitemaps, robots, canonicals, and Core Web Vitals. Not for security headers or remote mutations.

.devin/skills/optimise-seo/SKILL.md

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Sep 28, 2026
License
Apache-2.0

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# Optimise SEO

## Contract

| Field | Bound contract |
|---|---|
| Trigger | Improve SEO, Next.js SEO, sitemap, robots, meta tags, structured data, canonical URL, hreflang, Core Web Vitals, crawlability, indexability. |
| Authority | Reversible local: writes only named local project source files (App Router pages and layouts, `app/sitemap.ts`, `app/robots.ts`, `app/manifest.ts`, `next.config.ts`, JSON-LD components, `public/` assets); rollback is version control or restoring recorded prior content. No remote mutation. Audit-only mode reads a deployed origin without editing files. |
| Side effect | Applies or recommends SEO and technical changes within the named scope. No visual redesigns, component styling, or layout changes; no content rewriting; no security-header configuration; llms.txt and AI-agent readability are out of scope. |
| Done | A pass or fail checklist with per-check command evidence: build, curl header and meta checks, and Lighthouse. Each item is marked pass with evidence or fail with a named blocker. Done does not require green Core Web Vitals when external gates are unreachable; those items are marked blocked. |

## Inputs

Required: the repo root of the Next.js App Router app to change (edit mode), or a deployed origin URL (audit-only mode); the canonical production host (apex or www).