update agents starters #28318
Description
Existing documentation URL(s)
- https://developers.cloudflare.com/agents/
- https://developers.cloudflare.com/agents/getting-started/quick-start/
- https://developers.cloudflare.com/agents/getting-started/add-to-existing-project/
- https://developers.cloudflare.com/agents/getting-started/testing-your-agent/
- https://developers.cloudflare.com/agents/getting-started/build-a-chat-agent/
What changes are you suggesting?
The linked guides for building Agents should ensure they are up to date with Workers best practices, including code, config, .env usage (vs. .dev.vars) as per https://developers.cloudflare.com/workers/best-practices/workers-best-practices/
The chat agent guide should ensure it is up to date with https://github.com/cloudflare/agents-starter and all linked guides should ensure they are correct against the Agents SDK types and APIs in https://github.com/cloudflare/agents/
Make targeted updates to the content of these guides using our best practices, and then re-review for correctness.