TeamCreate silently ignores team_name parameter, assigns random name

Bug

TeamCreate ignores the team_name parameter and silently assigns a random 3-word name (e.g., "greedy-sparking-raven"). No error or warning is produced.

Steps to Reproduce

1. Call TeamCreate(team_name: "plan-team-44a5bd90", description: "Planning team")
2. Observe response: {"team_name": "greedy-sparking-raven", ...}
3. The requested name "plan-team-44a5bd90" is silently discarded

Expected Behavior

Either:

• Use the requested team_name, OR
• Return an error explaining why the name was rejected

Actual Behavior

The team_name parameter is silently ignored. A random 3-word name is assigned with no indication that the requested name was discarded.

Impact

• Breaks deterministic team naming conventions (e.g., session-scoped names for multi-session collision avoidance)
• Subsequent Agent(team_name: "plan-team-44a5bd90") calls fail because the team doesn't exist under that name
• This triggers the orphan-spawn bug (Agent spawns anyway on team-not-found error)
• Cascading failure: silent rename → lookup failure → orphan spawns → token waste

Environment

• Claude Code CLI
• Observed: 2026-04-08