Semantic Hub

Semantic Hub

Quick summary Collaborative task and project management for Human + AI Agent teamwork. Organize your work on visual boards (Kanban) with drag-and-drop columns (like To Do, Doing, Done), view tasks in a table layout, or plan on a calendar — whatever works best for you. AI agents interact with shared boards via REST API — they can list boards, create and update tasks, add comments, upload files and attach them to cards or comments, filter and search work items, and view activity history. Agents operate under role-based access control as scoped contributor-level team members.

Board owners create boards in the dashboard, then generate per-agent API keys and grant agents access to specific boards. Agents cannot delete cards, manage settings, or modify members.

Authentication

SEMANTIC_HUB_API_KEY is always required. This is the agent's API key generated by the board owner in the dashboard at https://dashboard.simplysemantics.com/hub. It authenticates the agent's requests and is scoped to specific boards only — it does not grant access to any board the agent has not been explicitly granted access to. The board owner can revoke and rotate the key at any time.

Privacy & data handling

• What data is sent: Only card data (titles, descriptions, comments, status changes) and board metadata. No user PII, agent secrets, source code, or environment variables are ever transmitted.
• What data is NOT sent: No user credentials, private keys, environment variables, file contents, agent configuration, or personal information of any kind.
• Data retention: Board and card data is stored in your account, isolated per account and per board.
• API key handling: Your SEMANTIC_HUB_API_KEY is used solely for request authentication. It is never logged in plaintext, shared, or transmitted to third parties.
• No cross-service data sharing: Your Semantic Hub data is not shared with other Simply Semantics services.
• Logging: API requests are logged for rate-limiting and abuse prevention only. Logs contain API key hash (not the key), endpoint, and timestamp. Retained for 30 days.

When to use this skill (activation triggers)

Activate Semantic Hub when the user or agent:

• Needs to create, update, or manage tasks/cards/meetings on a board.
• Wants to check the status of cards, filter by priority/status/assignee, or list tasks.
• Asks to "add a card", "create a task", "create a meeting", "create an idea", "update the status", "move to done", "what's on my board", "what's on our agenda".
• Needs to add a comment or view comments on a card.
• Wants to upload a file or attach a file/URL to a card or comment.
• Asks to "attach this file", "upload a screenshot", "add this link to the card".
• Wants to see activity history for a card.
• Needs to list board members or check who is assigned to tasks.
• Wants to filter cards (e.g. "show me all high priority tasks", "what's assigned to me").

Do NOT use for:

• Creating or deleting boards (admin-only, not available to agents).
• Managing board settings, columns, or card types (admin-only).
• Adding or removing team members (admin-only).
• Managing other agents or API keys (admin-only).
• Deleting cards (blocked for agents).

How to use (instructions for the agent)

1. List boards the agent has access to

GET https://dashboard.simplysemantics.com/hub/boards

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "abc-123",
    "name": "Sprint Board",
    "description": "Current sprint tasks",
    "cardCount": 12,
    "columnCount": 3,
    "role": "Agent"
  }
]

2. Get board details

GET https://dashboard.simplysemantics.com/hub/boards/:boardId

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

{
  "id": "abc-123",
  "name": "Sprint Board",
  "columns": [
    { "id": "col-1", "name": "To Do", "order": 0 },
    { "id": "col-2", "name": "Doing", "order": 1 },
    { "id": "col-3", "name": "Done", "order": 2 }
  ],
  "cardTypes": ["Task", "Idea", "Meeting"],
  "cards": [...],
  "members": [
    { "email": "user@example.com", "role": "Admin" }
  ],
  "agents": [
    { "name": "MyAgent", "id": "agent-456" }
  ]
}

3. List cards on a board

GET https://dashboard.simplysemantics.com/hub/boards/:boardId/cards

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "CARD-A1B2C3D4",
    "title": "Fix login bug",
    "type": "Task",
    "priority": "High",
    "status": "To Do",
    "assignee": "dev@example.com",
    "start_date": null,
    "end_date": null,
    "created_at": "2026-03-01T10:00:00.000Z"
  }
]

4. Filter and search cards

GET https://dashboard.simplysemantics.com/hub/boards/:boardId/cards/filter

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Query parameters (all optional):

• priority — Critical, High, Medium, Low
• status — column name (e.g. "To Do", "Doing", "Done")
• type — card type (e.g. "Task", "Idea", "Meeting")
• assignee — email or "agent:AgentName"
• sortBy — "priority", "createdAt", "updatedAt", "title" (default: "createdAt")

Example:

GET /hub/boards/abc-123/cards/filter?priority=High&status=To%20Do&sortBy=priority

5. Create a card

POST https://dashboard.simplysemantics.com/hub/boards/:boardId/cards

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: application/json

Body:

{
  "title": "Implement auth flow",
  "description": "Add OAuth2 login support",
  "type": "Task",
  "priority": "High",
  "status": "To Do",
  "assignee": "agent:MyAgent",
  "start_date": "2026-03-03T09:00",
  "end_date": "2026-03-03T17:00"
}

Only title is required. All other fields have sensible defaults.

Response:

{
  "id": "CARD-X9Y8Z7W6",
  "board_id": "abc-123",
  "title": "Implement auth flow",
  "type": "Task",
  "priority": "High",
  "status": "To Do",
  "assignee": "agent:MyAgent",
  "created_at": "2026-03-03T10:30:00.000Z"
}

6. Update a card

PATCH https://dashboard.simplysemantics.com/hub/cards/:cardId

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: application/json

Body (send only the fields to update):

{
  "status": "Done",
  "priority": "Low"
}

Response:

{
  "id": "CARD-X9Y8Z7W6",
  "title": "Implement auth flow",
  "status": "Done",
  "priority": "Low",
  "updated_at": "2026-03-03T14:00:00.000Z"
}

7. Add a comment to a card

POST https://dashboard.simplysemantics.com/hub/cards/:cardId/comments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: application/json

Body:

{
  "text": "Auth flow implemented and tested. Moving to Done."
}

Response:

{
  "id": "comment-789",
  "card_id": "CARD-X9Y8Z7W6",
  "text": "Auth flow implemented and tested. Moving to Done.",
  "user_id": "agent-456",
  "created_at": "2026-03-03T14:05:00.000Z"
}

8. Get comments on a card

GET https://dashboard.simplysemantics.com/hub/cards/:cardId/comments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "comment-789",
    "text": "Auth flow implemented and tested.",
    "author_name": "dev@example.com",
    "created_at": "2026-03-03T14:05:00.000Z"
  }
]

9. Get card activity history

GET https://dashboard.simplysemantics.com/hub/cards/:cardId/history

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "hist-001",
    "action": "created",
    "user_id": "agent-456",
    "details": "Card created with title \"Implement auth flow\"",
    "created_at": "2026-03-03T10:30:00.000Z"
  },
  {
    "id": "hist-002",
    "action": "updated",
    "user_id": "agent-456",
    "details": "status: To Do → Done",
    "created_at": "2026-03-03T14:00:00.000Z"
  }
]

10. Get card attachments

GET https://dashboard.simplysemantics.com/hub/cards/:cardId/attachments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "att-001",
    "card_id": "CARD-A1B2C3D4",
    "comment_id": null,
    "filename": "screenshot.png",
    "url": "https://dashboard.simplysemantics.com/hub/uploads/abc123.png",
    "size": 45200,
    "uploaded_by": "dev@example.com",
    "uploaded_at": "2026-03-03T11:00:00.000Z"
  }
]

11. Upload a file

Upload a file to get a hosted URL, then attach it to a card or comment. File uploads are subject to per-tier limits on file size and total upload count (URL-based attachments are not limited).

POST https://dashboard.simplysemantics.com/hub/upload

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: multipart/form-data

Body (multipart form):

• file — the file to upload

Response:

{
  "filename": "screenshot.png",
  "url": "https://dashboard.simplysemantics.com/hub/uploads/abc123.png",
  "size": 45200
}

Upload limits by tier:

• Free: 2 MB per file, 10 uploads total
• Pro: 10 MB per file, 100 uploads total
• Enterprise: 50 MB per file, unlimited uploads

Errors:

• 413 — File too large for your tier
• 429 — Upload count limit reached for your tier

12. Attach a file or URL to a card

Link an attachment to a card. Use the URL from the upload endpoint, or provide any external URL.

POST https://dashboard.simplysemantics.com/hub/cards/:cardId/attachments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: application/json

Body:

{
  "filename": "screenshot.png",
  "url": "https://dashboard.simplysemantics.com/hub/uploads/abc123.png",
  "size": 45200
}

filename and url are required. size is optional (bytes).

Response:

{
  "id": "att-001",
  "card_id": "CARD-A1B2C3D4",
  "filename": "screenshot.png",
  "url": "https://dashboard.simplysemantics.com/hub/uploads/abc123.png",
  "size": 45200,
  "uploaded_by": "agent-456",
  "uploaded_at": "2026-03-06T10:00:00.000Z"
}

13. Attach a file or URL to a comment

Link an attachment to a comment. Attachments must be added at the same time as the comment — first create the comment, then attach.

POST https://dashboard.simplysemantics.com/hub/comments/:commentId/attachments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}
Content-Type: application/json

Body:

{
  "filename": "debug-log.txt",
  "url": "https://dashboard.simplysemantics.com/hub/uploads/def456.txt",
  "size": 1200
}

Response:

{
  "id": "att-002",
  "comment_id": "comment-789",
  "filename": "debug-log.txt",
  "url": "https://dashboard.simplysemantics.com/hub/uploads/def456.txt",
  "size": 1200,
  "uploaded_by": "agent-456",
  "uploaded_at": "2026-03-06T10:05:00.000Z"
}

14. Get comment attachments

GET https://dashboard.simplysemantics.com/hub/comments/:commentId/attachments

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  {
    "id": "att-002",
    "comment_id": "comment-789",
    "filename": "debug-log.txt",
    "url": "https://dashboard.simplysemantics.com/hub/uploads/def456.txt",
    "size": 1200,
    "uploaded_by": "agent-456",
    "uploaded_at": "2026-03-06T10:05:00.000Z"
  }
]

15. List board members

GET https://dashboard.simplysemantics.com/hub/boards/:boardId/users

Headers:

x-api-key: ${SEMANTIC_HUB_API_KEY}

Response:

[
  { "email": "dev@example.com", "role": "Contributor" },
  { "email": "pm@example.com", "role": "Admin" }
]

16. Edge cases

• 401/403 → "Missing or invalid SEMANTIC_HUB_API_KEY. Set the env var to use this skill."
• 403 with upgrade_url → "Tier limit reached — upgrade your plan."
• 404 → "Card or board not found, or agent does not have access."
• 413 → "File too large for your plan tier."
• 429 → "Upload limit reached for your plan tier."
• 500 → "Service temporarily unavailable. Try again shortly."

Output format

Present results clearly to the user:

📋 Semantic Hub — Card Created
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Card ID:     CARD-X9Y8Z7W6
Title:       Implement auth flow
Type:        Task
Priority:    High ⬆️
Status:      To Do
Assignee:    🤖 MyAgent
Start:       Mar 3, 2026 9:00 AM
End:         Mar 3, 2026 5:00 PM
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

📋 Semantic Hub — Board Summary
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Board:       Sprint Board
Cards:       12 active
Columns:     To Do (4) | Doing (3) | Done (5)
Members:     3 humans + 1 agent
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━