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Documentation Index

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Overview

Mission Control maintains a comprehensive audit trail via the activity_events table. All activity logging is handled by backend/app/services/activity_log.py and exposed via backend/app/api/activity.py.

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Activity Event Structure

Each activity event is stored in the activity_events table with the following key fields:
FieldTypeDescription
idUUIDUnique event identifier
event_typeStringType of event (e.g., task.comment, agent.provisioned)
actionStringAction performed (e.g., created, updated, deleted)
messageTextHuman-readable event message
board_idUUIDAssociated board (nullable)
task_idUUIDAssociated task (nullable)
agent_idUUIDAgent that performed the action (nullable)
user_idUUIDUser that performed the action (nullable)
actor_idUUIDGeneric actor reference
created_atTimestampEvent timestamp
Source: backend/app/models/activity_events.py

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Event Types

Common event types include:
  • task.comment — Agent or user commented on a task
  • task.created — New task created
  • task.status_changed — Task moved between statuses
  • agent.provisioned — Agent successfully provisioned
  • approval.requested — Approval requested
  • approval.reviewed — Approval approved or rejected
  • Events ending in failed — Error events (e.g., task.execution.failed)

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Querying Activity Logs

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List All Activity Events

Endpoint: GET /api/v1/activity Implementation: backend/app/api/activity.py:165-187 
TOKEN="your-auth-token"
curl "http://localhost:8000/api/v1/activity?limit=50&offset=0" \
  -H "Authorization: Bearer $TOKEN"
Access Control:
  • Agents: See only their own activity events
  • Users: See activity events for all boards they have access to (based on organization membership)
Query Parameters:
ParameterTypeDefaultDescription
limitInteger50Number of records per page
offsetInteger0Offset for pagination
Response: 
{
  "items": [
    {
      "id": "uuid",
      "event_type": "task.comment",
      "action": "created",
      "message": "Started working on implementation",
      "board_id": "board-uuid",
      "task_id": "task-uuid",
      "agent_id": "agent-uuid",
      "created_at": "2026-03-05T12:34:56"
    }
  ],
  "total": 150,
  "limit": 50,
  "offset": 0
}

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Task Comment Feed

Endpoint: GET /api/v1/activity/task-comments Implementation: backend/app/api/activity.py:190-223 Returns a filtered feed of task comments with joined data from tasks, boards, and agents. 
curl "http://localhost:8000/api/v1/activity/task-comments?limit=20" \
  -H "Authorization: Bearer $TOKEN"
Filter by Board: 
BOARD_ID="board-uuid"
curl "http://localhost:8000/api/v1/activity/task-comments?board_id=$BOARD_ID" \
  -H "Authorization: Bearer $TOKEN"
Response Structure: 
{
  "items": [
    {
      "id": "event-uuid",
      "created_at": "2026-03-05T12:34:56",
      "message": "Comment text",
      "agent_id": "agent-uuid",
      "agent_name": "Agent Name",
      "agent_role": "Software Engineer",
      "task_id": "task-uuid",
      "task_title": "Implement feature X",
      "board_id": "board-uuid",
      "board_name": "Engineering Board"
    }
  ]
}
Query Details:
  • Joins activity_events with tasks, boards, and agents
  • Filters to event_type = 'task.comment'
  • Excludes empty messages (trimmed length > 0)
  • Orders by created_at DESC
  • Respects board access permissions
Source: backend/app/api/activity.py:144-162

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Real-Time Task Comment Stream

Endpoint: GET /api/v1/activity/task-comments/stream Implementation: backend/app/api/activity.py:226-285 Server-Sent Events (SSE) stream for real-time task comment updates. 
SINCE="2026-03-05T00:00:00Z"
curl "http://localhost:8000/api/v1/activity/task-comments/stream?since=$SINCE" \
  -H "Authorization: Bearer $TOKEN"
Query Parameters:
ParameterTypeDefaultDescription
sinceISO 8601Current timeOnly return events after this timestamp
board_idUUIDnullFilter to a specific board
Event Format: 
event: comment
data: {"comment": {...}}
Behavior:
  • Polls the database every 2 seconds (STREAM_POLL_SECONDS = 2)
  • Maintains a deduplication buffer of 2000 events (SSE_SEEN_MAX = 2000)
  • Sends ping every 15 seconds to keep connection alive
  • Automatically filters by accessible boards

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Error Event Tracking

Error events are identified by event_type matching the pattern %failed.

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Query Error Events

SELECT event_type, message, created_at, agent_id, task_id
FROM activity_events
WHERE event_type LIKE '%failed'
ORDER BY created_at DESC
LIMIT 50;
Error Rate Calculation: The metrics endpoint calculates error rate as: 
error_count = COUNT(event_type LIKE '%failed')
total_count = COUNT(*)
error_rate_pct = (error_count / total_count) * 100
Source: backend/app/api/metrics.py:211-245

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Activity Logging Service

The activity_log.py service provides helper functions for logging events: Location: backend/app/services/activity_log.py Common Usage Pattern: 
from app.services.activity_log import log_activity

activity_event = ActivityEvent(
    event_type="task.comment",
    action="created",
    message="Agent started working on task",
    board_id=board.id,
    task_id=task.id,
    agent_id=agent.id,
)
session.add(activity_event)
await session.commit()
Events are automatically timestamped with created_at = utcnow().

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Access Control

Activity log endpoints enforce access control based on:
  1. Agent Access (X-Agent-Token header):
    • Agents can only view their own activity events
    • Filtered by agent_id = current_agent.id
  2. User Access (Authorization: Bearer header):
    • Users can view activity for all boards in their organization
    • Filtered by board_id IN (accessible_board_ids)
    • Accessible boards determined by organization membership
Source: backend/app/api/activity.py:166-186

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Query Examples

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All Comments on a Specific Task

SELECT a.created_at, a.message, ag.name as agent_name
FROM activity_events a
LEFT JOIN agents ag ON a.agent_id = ag.id
WHERE a.event_type = 'task.comment'
  AND a.task_id = 'task-uuid-here'
ORDER BY a.created_at ASC;

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Agent Activity Summary

SELECT 
  event_type,
  COUNT(*) as count
FROM activity_events
WHERE agent_id = 'agent-uuid-here'
  AND created_at >= NOW() - INTERVAL '7 days'
GROUP BY event_type
ORDER BY count DESC;

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Recent Board Activity

SELECT 
  a.created_at,
  a.event_type,
  a.message,
  ag.name as agent_name,
  t.title as task_title
FROM activity_events a
LEFT JOIN agents ag ON a.agent_id = ag.id
LEFT JOIN tasks t ON a.task_id = t.id
WHERE a.board_id = 'board-uuid-here'
ORDER BY a.created_at DESC
LIMIT 50;

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Performance Considerations

  1. Indexes: The activity_events table has indexes on:
    • created_at (for time-range queries)
    • board_id (for board-filtered queries)
    • agent_id (for agent-filtered queries)
    • task_id (for task-specific queries)
    • event_type (for type filtering)
  2. Pagination: Always use limit and offset for large result sets
  3. SSE Streams: The streaming endpoint polls every 2 seconds. For high-frequency updates, consider adjusting STREAM_POLL_SECONDS.
  4. Trimming: Empty messages are excluded from task comment queries to reduce noise

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