Multi-User Collaboration Extension

[MSicc]

Summary

Define optional support for multi-user contexts within a single project.

Motivation

Teams often need different role and preference settings per user.

Proposed Approach

• Introduce user identifiers and per-user context overrides.
• Define switching rules and safety checks.
• Keep feature optional.

Acceptance Criteria

• Spec section includes a minimal multi-user model.
• Examples show user-specific context selection.
• Templates and prompt workflows updated to reflect spec changes, with validation passing.