[adrienlacombe]

Summary

Adds an AGENTS.md at the repo root to give AI coding agents (Codex, Claude Code, Copilot and others) the context they would otherwise have to rediscover:

• Layout: what each workspace package does and how they depend on each other.
• Commands: install, build, typecheck, lint and test, including that you must build before testing and how to run a single package's tests without watch mode.
• Code style: Biome conventions and where tests live.
• Workflow: master is the only branch (ci: release from master only, retire develop #343), commits follow Conventional Commits, and releases go through changesets: when a changeset is needed, never hand-edit versions or changelogs, and never publish locally.
• Dependencies: the pnpm catalog, plus the override pitfall found in chore(deps): patch Dependabot security alerts #339 (version-selector overrides also rewrite multi-range peer specs).
• Recipes: adding a wallet, and bumping @starknet-io/types-js.

Docs only, so there's no changeset.

Test plan

• The documented commands were run on this branch: pnpm build, pnpm lint:check (passes on all packages), and pnpm --filter @starknet-io/get-starknet-wallets exec vitest run
• Package descriptions checked against each package's entry point

🤖 Generated with Claude Code