docs: add .agents/skills/axios-cache-interceptor.md and AI install guide

[Copilot]

Adds a concise, scannable skill reference for AI coding assistants at .agents/skills/axios-cache-interceptor.md, and documents how to install it in the getting started guide.

What's included

• Setup — setupCache() with request deduplication example
• Response shape — id, cached, stale fields
• Global & per-request config — ttl, enabled, cachePredicate, staleIfError, hydrate, override, etag, vary
• Cache invalidation — cache.update (delete + programmatic update), storage.remove/clear
• Storage backends — memory, localStorage/sessionStorage, custom via buildStorage (Redis example included)
• HTTP standards — ETag/If-None-Match, Vary, Cache-Control/Expires header behaviour table
• Key generation — custom IDs, SHA-256 generator for persistent caches exceeding 77,000 unique keys
• Debugging — dev build import + debug callback
• TypeScript types — key named imports
• Common patterns — singleton, opt-in caching, post-mutation invalidation, persistent browser cache
• llms.txt link — https://axios-cache-interceptor.js.org/llms.txt added to skill header so AI tools can crawl the full documentation
• AI / LLM Skills section — added to docs/src/guide/getting-started.md documenting npx skills add axios-cache-interceptor via the Skills framework

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[arthurfiorette]

Can you document on our install guide that we have skills that can be installed using https://github.com/vercel-labs/skills? Also put in the skill a link to our https://axios-cache-interceptor.js.org/llms.txt AIs can use to crawl.

[Copilot]

Can you document on our install guide that we have skills that can be installed using https://github.com/vercel-labs/skills? Also put in the skill a link to our https://axios-cache-interceptor.js.org/...

Done in a7045eb:

• Added https://axios-cache-interceptor.js.org/llms.txt to the skill file's header metadata so AI tools can crawl the full docs.
• Added an "AI / LLM Skills" section to docs/src/guide/getting-started.md documenting npx skills add axios-cache-interceptor (via the Skills framework).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.77%. Comparing base (ca3a099) to head (a7045eb).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

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  Coverage   98.77%   98.77%           
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  Files          20       20           
  Lines        3113     3113           
  Branches      299      299           
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  Hits         3075     3075           
  Misses         37       37           
  Partials        1        1           

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[Copilot]

Pull request overview

Adds an “AI / LLM Skills” entry point to the Getting Started guide and introduces a Skills-framework markdown “skill” document intended to give AI assistants a curated, up-to-date reference for axios-cache-interceptor.

Changes:

• Document a new “AI / LLM Skills” section in the Getting Started guide with an npx skills add ... install command.
• Add a new .agents/skills/axios-cache-interceptor.md skill file containing usage patterns, configuration reference, and examples.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
docs/src/guide/getting-started.md	Adds documentation for installing an AI/LLM “skill” for this library
.agents/skills/axios-cache-interceptor.md	Introduces a comprehensive skill doc with examples and configuration guidance

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