Spec Kit Component: trade-feed

Responsibilities

• Provide pub/sub message bus for trade and position event topics.
• Maintain command compatibility for subscribe/unsubscribe/publish flows.

Covered Flows

• STARTUP
• F2
• F4

Requirement Coverage

• SYS-FR-001, SYS-FR-004
• SYS-NFR-004

Verification

• scripts/test-trade-feed-overlay.sh