SDD Planning Sub-Skill

Entry point: /​faion-net — invoke this skill for automatic routing to the appropriate domain.

SDD Planning Sub-Skill

Documentation planning phase of Specification-Driven Development.

Communication: User's language. Docs/​code: English.

Context Discovery

Auto-Investigation

Discovery Questions

questions:
  - question: "Which SDD phase are you in?"
    options:
      - label: "Writing specification"
        description: "Use writing-specifications, spec-structure"
      - label: "Creating design doc"
        description: "Use design-doc-structure, design-doc-writing-process"
      - label: "Breaking down into tasks"
        description: "Use writing-implementation-plans, task-creation-principles"
      - label: "Setting up SDD workflow"
        description: "Use workflows, templates"

  - question: "Do you have existing SDD documentation?"
    options:
      - label: "Yes, following SDD"
        description: "Continue with established patterns"
      - label: "Partial/​inconsistent"
        description: "Standardize using templates"
      - label: "No, starting fresh"
        description: "Start with spec-structure, templates"

  - question: "What's your task complexity?"
    options:
      - label: "Simple features (<50k tokens)"
        description: "Standard task breakdown"
      - label: "Complex features (>100k tokens)"
        description: "Apply impl-plan-100k-rule, split features"

Philosophy

"Intent is the source of truth" - specification is the main artifact, code is implementation.

No Time Estimates: Use complexity (Low/​Medium/​High) + token estimates (~Xk).

Scope

This sub-skill handles:

• Writing specifications (WHAT + WHY)
• Creating design documents (HOW)
• Breaking down implementation plans (TASKS)
• Task creation and templating
• Workflow documentation

Decision Tree

Methodologies (28)

Related Sub-Skill

faion-sdd-execution - Quality gates, reflexion, patterns, memory, execution workflows.

faion-sdd-planning v1.0 Planning phase: specs → design → impl-plan → tasks