feat(mcp): AgentOpinion protocol and discussion engine #832
Description
Purpose
Define the structured protocol for agent opinions and build the discussion engine that orchestrates multi-round debates between specialists.
Changes
apps/mcp-server/src/— AgentOpinion interface, DiscussionEngine service- Discussion rounds: independent analysis → cross-review → consensus
Acceptance Criteria
- AgentOpinion schema (agent, color, stance, summary, severity, respondsTo)
- Round 1: parallel independent analysis collection
- Round 2: cross-review when critical/high issues exist
- Round 3: consensus judgment (Critical=0 → pass)
- TDD: tests first
- Can be merged independently