dependency-mapping

Skill: Dependency Mapping

Load trigger: "load dependency-mapping skill" > DORA: Cap 3 (AI-Accessible Internal Data) Token cost: Low

Purpose

Determine the correct ordering and dependencies between tasks.

Responsibilities

• Identify task prerequisites
• Identify parallelizable tasks
• Build dependency graph
• Detect circular dependencies

Inputs

• tasks.json

Outputs

• dependency-graph.json

Mapping Rules

Prerequisite Detection

• Task B cannot start until Task A completes if B uses A's output
• Shared files imply ordering (last-writer-wins)
• Tests depend on implementation tasks
• Deployment depends on build and test tasks

Parallelism Detection

• Tasks with no shared dependencies can run in parallel
• Independent modules can be built concurrently
• Tests for different features can run in parallel

Circular Dependency Detection

• No task depends on itself (directly or transitively)
• No circular chains exist in the dependency graph
• If cycles detected, flag for human resolution

Graph Format

{
  "nodes": [
    {
      "task_id": "TASK-001",
      "title": "Task title",
      "estimated_lines": 150
    }
  ],
  "edges": [
    {
      "from": "TASK-001",
      "to": "TASK-002",
      "reason": "TASK-002 uses output from TASK-001"
    }
  ],
  "parallel_groups": [["TASK-003", "TASK-004"]],
  "critical_path": ["TASK-001", "TASK-002", "TASK-005"]
}

Success Criteria

• Dependency graph is valid and complete
• No circular dependencies
• Critical path identified
• Parallelizable tasks identified