---

name: collaboration-hub description: Develop and modify the AILANG Collaboration Hub UI. Use when user asks to add features to the monitoring dashboard, modify the approval queue, update the message center, or make changes to the React frontend.

Collaboration Hub Developer

Build and modify the AILANG Collaboration Hub - a React-based UI for multi-agent coordination, task execution monitoring, and observability.

Quick Start

Starting services:

Copymake services-start         # Start server + coordinator
make services-status        # Check both services
make services-stop          # Stop both
make services-restart       # Rebuild and restart

After UI changes:

Copymake ui-deploy              # Build, clean, copy to server
make services-restart       # Restart with new build

Key URLs:

• UI: http://localhost:1957/
• REST API: http://localhost:1957/api/
• WebSocket: ws://localhost:1957/ws

When to Use This Skill

Use when user asks to:

• Add features to Control Plane dashboard
• Modify Observatory or task hierarchy views
• Update message center or approval queue
• Add components to trace waterfall or event queue
• Style or theme UI components
• Diagnose hierarchy or span issues

Architecture Overview

Backend (Go):

• internal/server/server.go - HTTP server, static files
• internal/server/handlers_controlplane.go - Control plane API
• internal/observatory/ - Telemetry and span storage
• internal/observatory/hierarchy.go - Hierarchy building

Frontend (React + TypeScript + Vite):

Copyui/src/
├── App.tsx                     # Main app, navigation
├── features/
│   ├── controlplane/           # Control Plane v4 (main view)
│   │   ├── ControlPlane.tsx    # Main container
│   │   ├── components/         # MessageQueue, TraceWaterfall, etc.
│   │   └── hooks/              # useEventQueue, useTraceData
│   ├── observatory/            # Task and span exploration
│   ├── tasks/                  # Task execution monitoring
│   ├── agents/                 # Agent management
│   ├── messaging/              # Message center
│   └── approvals/              # Approval workflow
└── components/                 # Shared components

Database: SQLite at ~/.ailang/state/observatory.db

Available Scripts

scripts/diagnose.sh <command>

Diagnose Collaboration Hub and Observatory issues.

Commands:

Copy.claude/skills/collaboration-hub/scripts/diagnose.sh health          # Server + DB check
.claude/skills/collaboration-hub/scripts/diagnose.sh task <id>       # Task details
.claude/skills/collaboration-hub/scripts/diagnose.sh spans <task_id> # Span hierarchy
.claude/skills/collaboration-hub/scripts/diagnose.sh orphans         # Find orphan spans
.claude/skills/collaboration-hub/scripts/diagnose.sh costs           # Cost breakdown
.claude/skills/collaboration-hub/scripts/diagnose.sh recent          # Recent activity

Key API Endpoints

Control Plane:

• GET /api/controlplane/stats - Unified stats
• GET /api/controlplane/exec-hierarchy - Execution hierarchy

Observatory:

• GET /api/observatory/tasks/{id}/hierarchy - Full task hierarchy (RECOMMENDED)
• GET /api/observatory/spans?task_id=X - Spans by task
• GET /api/observatory/traces/{id} - Trace with all spans

Approvals (v0.6.5+):

• GET /api/coordinator/pending - List pending approvals
• POST /api/coordinator/approve/{id} - Approve (merge + optional handoff)
• POST /api/coordinator/reject/{id} - Reject with feedback

For complete API reference: See resources/rest_api_reference.md

Approval Workflow (v0.6.5+)

The approval system uses unified approvals where merge and handoff are combined:

API response includes:

Copy{
  "id": "apr-123",
  "type": "merge_handoff",
  "context_json": "{\"handoff_targets\":[\"sprint-planner\"],\"session_id\":\"...\"}"
}

UI considerations:

• Show handoff targets when type === "merge_handoff"
• Update button text to indicate handoff will occur
• Show session continuity info (agent will resume with context)

Hierarchy & Trace Correlation

The hierarchy API applies three levels of virtual re-parenting:

1. Timestamp Correlation - Fixes ailang.* spans under exec.tool_use
2. Cross-Trace Merging - Links spans across different trace IDs
3. Session-Based Merging - Links orphan traces by session.id

Why use hierarchy API? Child spans don't have task_id set. The hierarchy endpoint expands traces to include ALL spans.

For detailed algorithm: See resources/hierarchy_algorithm.md

Development Workflow

Adding a Component

Copy// ui/src/features/controlplane/components/NewComponent.tsx
import styles from '../ControlPlane.module.css';

export const NewComponent: React.FC<Props> = ({ data }) => {
  return <div className={styles.newComponent}>{/* content */}</div>;
};

Adding Styles

Copy/* Add to ControlPlane.module.css */
.newComponent {
  background: var(--bg-surface);
  padding: var(--space-4);
}

CSS Variables

Copy/* Colors */
--bg-deep: #0a0c10;
--bg-surface: #161b22;
--primary: #25c2a0;
--success: #10b981;
--danger: #ef4444;

/* Text */
--text-primary: #e6edf3;
--text-secondary: #8b949e;

/* Spacing */
--space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;

Troubleshooting

Event shows no spans

1. Run: scripts/diagnose.sh task TASK_ID
2. Check hierarchy API: curl localhost:1957/api/observatory/tasks/TASK_ID/hierarchy
3. Check spans exist: scripts/diagnose.sh spans TASK_ID

Missing child spans (exec.turn, etc.)

Use hierarchy API, not direct spans API:

Copy# Wrong - only spans with task_id
curl "/api/observatory/spans?task_id=X"

# Correct - all spans in linked traces
curl "/api/observatory/tasks/X/hierarchy"

UI changes not appearing

Copymake ui-deploy              # Clean build
# Hard refresh: Cmd+Shift+R

For database diagnostics: See resources/database_diagnosis.md

Resources

• REST API Reference: resources/rest_api_reference.md
• Database Diagnosis: resources/database_diagnosis.md
• Hierarchy Algorithm: resources/hierarchy_algorithm.md
• ID Relationships: resources/id_relationships.md - How IDs link across all 3 databases

Progressive Disclosure

1. Always loaded: This SKILL.md (~200 lines)
2. Execute as needed: Scripts in scripts/
3. Load on demand: Resources in resources/

Self-Improvement

This skill self-improves. When issues are discovered:

1. Identify the issue
2. Update scripts/resources/SKILL.md
3. Validate changes
4. Log in CHANGELOG.md