[Cedric Vidal (cedricvidal)]

Summary

microsoft/scope#1406 intentionally simplified the root README by moving setup and development guidance to the official documentation website. That refactor also removed the explicit GITHUB_TOKEN="$(gh auth token)" pnpm docker:dev:copilot startup instruction.

AI agents have since repeatedly started the Docker Compose development stack without injecting the GitHub token. This PR restores that operational requirement in AGENTS.md, where agent-specific instructions belong, rather than reversing #1406's README simplification. It also restores concise guardrails for Docker host isolation, environment-file ownership, and dependency notices.

Demos

N/A - documentation-only change.

Before

N/A

After

N/A

Testing

• git diff --check - passed
• Reviewed the final branch diff against origin/main; only AGENTS.md changed.

Documentation and compatibility

Updated AGENTS.md. No runtime, API, CLI, database, or upgrade compatibility impact.

Checklist

• If Portal features changed, keep CLI capabilities in sync. (N/A)
• If Portal components changed, update their Storybook stories. (N/A)
• If database changes require a migration, include up() / down() and keep it CosmosDB-compatible. (N/A)
• If dependencies changed, update the lockfile and regenerate NOTICE / NOTICE-REVIEW.txt with pnpm notice as needed. (N/A)
• Video showing the behavior before the suggested change (N/A)
• Video showing the behavior after the suggested change (N/A)