Validate team_utils.py storage path against real Agent Teams

[michael-wojcik]

Context

PR #162 (PACT v3.0 Agent Teams) added pact-plugin/hooks/shared/team_utils.py with functions that read from ~/.claude/teams/{name}/config.json. This path is assumed from the Agent Teams documentation but hasn't been empirically validated.

What to validate

When Agent Teams is first deployed:

1. Run a session that creates a team via TeamCreate
2. Check if ~/.claude/teams/{team-name}/config.json exists on disk
3. If so, verify the JSON structure matches what get_team_members() expects (a members array with name, agentId, agentType fields)
4. If the path or structure differs, update team_utils.py accordingly

Impact if path is wrong

All functions degrade gracefully (return empty/False), but:

• session_init._team_instruction() "survived compaction" message never appears
• stop_audit.audit_team_state() reports no team members
• checkpoint_builder._get_team_context() provides no team enrichment

No crashes, but reduced observability.

Files affected

• pact-plugin/hooks/shared/team_utils.py (all functions)
• pact-plugin/hooks/session_init.py (_team_instruction)
• pact-plugin/hooks/stop_audit.py (audit_team_state)
• pact-plugin/hooks/refresh/checkpoint_builder.py (_get_team_context)