[BUG] TeamCreate/TeamDelete removed in 2.1.179 but CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS still documented

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

### Summary
With CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1 set (in settings.json env and
exported in the process env), the TeamCreate / TeamDelete / TeamList tools
are no longer exposed to the model in Claude Code 2.1.179. The task/messaging
primitives (TaskCreate, TaskUpdate, SendMessage) ARE exposed, and the
Agent tool now documents team_name as: "Deprecated; ignored. The session
has a single implicit team."

This looks like an intentional migration from explicit team management to an
plugin/skill whose preflight or orchestration calls TeamCreate/TeamDelete.

### Environment

• Claude Code: 2.1.179
• OS: Linux (5.4.0-1160-aws-fips)
• ~/.claude/settings.json env: CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS: "1", teammateMode: "auto"
• Confirmed exported: CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1

### Actual
Flag is honored as env but the explicit-team tools are silently absent; the
only signal is the Agent tool's "team_name … Deprecated; ignored" note.

### Ask
Confirm whether CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS / TeamCreate are
deprecated, and document the supported teammate API for 2.1.x so plugins can
migrate.

What Should Happen?

Expected

Either:
(a) CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1 still exposes the legacy
TeamCreate/TeamDelete tools, OR
(b) the flag is now a no-op and the explicit-team API is officially removed —
in which case please document the replacement (implicit single team +
Agent spawn with name/run_in_background + SendMessage) and a
migration note, so plugins relying on TeamCreate know to update.

Error Messages/Logs

Steps to Reproduce

### Repro

1. Set the flag above; restart the session.
2. Invoke any skill that runs the documented Agent-Teams preflight

TeamCreate(team_name: "...", description: "...").

1. The model cannot find/call TeamCreate (the tool isn't registered).

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.179

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_