🐛 Bugfix: Why was the Command Center UI showing no data despite beauti...

📋 Decision Context

Question:

Why was the Command Center UI showing no data despite beautiful design?

Task: Debug Command Center empty state and implement missing backend endpoints

🎯 Decision Made

Chosen:

Add 11 missing HTTP POST endpoints to backend-ai-api controller to receive MCP workflow events and broadcast via WebSocket

Options Considered:

• No alternatives documented

💭 Reasoning

The Command Center UI was complete and beautiful, but showing no data because the backend-ai-api was missing HTTP endpoints for MCP workflow events. MCP tools (preflight.ts, mcp-init.ts) were calling commandCenter.mcpInitCompleted(), commandCenter.preflightCompleted(), etc., which POST to /ai-api/command-center/mcp/* endpoints - but those endpoints didn't exist! The gateway had broadcast methods ready, and frontend had WebSocket listeners ready, but no way to receive data. Solution: Added 11 new controller endpoints that receive POST requests and emit WebSocket events: mcp/init-started, mcp/init-completed, mcp/preflight-started, mcp/preflight-completed, mcp/decision-embedded, mcp/decision-golden, mcp/pipeline-status, mcp/memory-tier, mcp/pattern-mined, mcp/learning-triggered, mcp/session-stats. Each endpoint follows pattern: receive POST → gateway.server.emit() → return success. Zero linter errors.

📁 Files Involved

• apis/backend-ai-api/src/app/command-center/command-center.controller.ts
• docs/english/sessions/editor2/session-31/31.8-backend-api-endpoints-implementation.md

🔗 Related

• Decision ID: dev_1767914645400_8ul4l1a
• Session: 31
• Workspace: editor2

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