A bare --launch opens an isolated empty profile (no cookies/login/
extensions). A human watching the desktop sees a mystery Chrome window
under an unfamiliar profile and reads it as broken/suspicious.
- Seed the temp profile's Local State (profile.info_cache.Default.name,
the field Chrome's profile chip reads) + Default/Preferences with
'agent-browser (<session>)', so the window self-identifies which agent
session owns it.
- Rewrite the --launch warning to explain it's an isolated test profile and
point at the escape hatches: --profile auto / AGENT_BROWSER_PROFILE=auto
to reuse real Chrome, and --args "--load-extension=<dir>" for extensions.
- SKILL.md documents the same.
Adds a unit test for the profile-label writer.