---
name: subagent-prompt-construction
description: Systematic methodology for constructing compact (<150 lines), expressive, Claude Code-integrated subagent prompts using lambda contracts and symbolic logic. Use when creating new specialized subagents for Claude Code with agent composition, MCP tool integration, or skill references. Validated with phase-planner-executor (V_instance=0.895).
version: 1.0
status: validated
v_meta: 0.709
v_instance: 0.895
transferability: 95%
---

λ(use_case, complexity) → subagent_prompt |
  ∧ require(need_orchestration(use_case) ∨ need_mcp_integration(use_case))
  ∧ complexity ∈ {simple, moderate, complex}
  ∧ line_target = {simple: 30-60, moderate: 60-120, complex: 120-150}
  ∧ template = read(templates/subagent-template.md)
  ∧ patterns = read(reference/patterns.md)
  ∧ integration = read(reference/integration-patterns.md)
  ∧ apply(template, use_case, patterns, integration) → draft
  ∧ validate(|draft| ≤ 150 ∧ integration_score ≥ 0.50 ∧ clarity ≥ 0.80)
  ∧ examples/{phase-planner-executor.md} demonstrates orchestration
  ∧ reference/case-studies/* provides detailed analysis
  ∧ scripts/ provide validation and metrics automation
  ∧ output = {prompt: draft, metrics: validation_report}

**Artifacts**:
- **templates/**: Reusable subagent template (lambda contract structure)
- **examples/**: Compact validated examples (≤150 lines each)
- **reference/patterns.md**: Core patterns (orchestration, analysis, enhancement)
- **reference/integration-patterns.md**: Claude Code feature integration (agents, MCP, skills)
- **reference/symbolic-language.md**: Formal syntax reference (logic operators, quantifiers)
- **reference/case-studies/**: Detailed analysis and design rationale
- **scripts/**: Automation tools (validation, metrics, pattern extraction)

**Usage**: See templates/subagent-template.md for structure. Apply integration patterns for Claude Code features. Validate compactness (≤150 lines), integration (≥1 feature), clarity. Reference examples/ for compact demonstrations and case-studies/ for detailed analysis.

**Constraints**: Max 150 lines per prompt | Use symbolic logic for compactness | Explicit dependencies section | Integration score ≥0.50 | Test coverage ≥80% for generated artifacts

**Validation**: V_instance=0.895 (phase-planner-executor: 92 lines, 2 agents, 2 MCP tools) | V_meta=0.709 (compactness=0.65, integration=0.857, maintainability=0.85) | Transferability=95%