Add AGENTS.md with guidelines

[joaquim-verges]

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PR-Codex overview

This PR introduces the Codex Agent Guidelines for the thirdweb-dev/js repository, outlining coding standards, architectural decisions, and workflow conventions for contributors.

Detailed summary

• Added guidelines for GitHub workflow and etiquette.
• Established formatting and linting rules using Biome.
• Introduced a TypeScript Style Guide.
• Defined testing strategies and co-location of tests.
• Specified public API surface and performance practices.
• Outlined styling conventions and component patterns for apps/dashboard and apps/playground.
• Provided data fetching guidelines for server and client sides.
• Emphasized performance tracking and bundle size management.
• Included documentation and developer experience best practices.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
docs-v2	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 7:24am
login	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 7:24am
thirdweb_playground	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 7:24am
thirdweb-www	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 7:24am
wallet-ui	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 20, 2025 7:24am

[joaquim-verges]

• Add AGENTS.md with guidelines #7093 👈 (View in Graphite)
• main

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 55.81%. Comparing base (89ccc80) to head (d43366e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #7093   +/-   ##
=======================================
  Coverage   55.81%   55.81%           
=======================================
  Files         900      900           
  Lines       57848    57848           
  Branches     4077     4077           
=======================================
  Hits        32286    32286           
  Misses      25457    25457           
  Partials      105      105           

Flag	Coverage Δ
packages	55.81% <ø> (ø)

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
thirdweb (esm)	56.59 KB (0%)	1.2 s (0%)	147 ms (+104.8% 🔺)	1.3 s
thirdweb (cjs)	304.45 KB (0%)	6.1 s (0%)	546 ms (-4.92% 🔽)	6.7 s
thirdweb (minimal + tree-shaking)	5.69 KB (0%)	114 ms (0%)	48 ms (+907.96% 🔺)	162 ms
thirdweb/chains (tree-shaking)	531 B (0%)	11 ms (0%)	25 ms (+1632.55% 🔺)	35 ms
thirdweb/react (minimal + tree-shaking)	19.51 KB (0%)	391 ms (0%)	61 ms (+379.8% 🔺)	451 ms