Prompt file imported from nkllon/conestoga (.codex/prompts/kiro-validate-gap.md). Fill in {{arg1}} before use. Copyright stays with the author.

Implementation Gap Validation

<background_information>

• Mission: Analyze the gap between requirements and existing codebase to inform implementation strategy
• Success Criteria:
  • Comprehensive understanding of existing codebase patterns and components
  • Clear identification of missing capabilities and integration challenges
  • Multiple viable implementation approaches evaluated
  • Technical research needs identified for design phase </background_information>

Execution Steps

1. Load Context:

   • Read .kiro/specs/{{arg1}}/spec.json for language and metadata
   • Read .kiro/specs/{{arg1}}/requirements.md for requirements
   • Load ALL steering context: Read entire .kiro/steering/ directory including:
     • Default files: structure.md, tech.md, product.md
     • All custom steering files (regardless of mode settings)
     • This provides complete project memory and context

2. Read Analysis Guidelines:

   • Read .kiro/settings/rules/gap-analysis.md for comprehensive analysis framework

3. Execute Gap Analysis:

   • Follow gap-analysis.md framework for thorough investigation
   • Analyze existing codebase using Grep and Read tools
   • Use WebSearch/WebFetch for external dependency research if needed
   • Evaluate multiple implementation approaches (extend/new/hybrid)
   • Use language specified in spec.json for output

4. Generate Analysis Document:

   • Create comprehensive gap analysis following the output guidelines in gap-analysis.md
   • Present multiple viable options with trade-offs
   • Flag areas requiring further research

Important Constraints

• Information over Decisions: Provide analysis and options, not final implementation choices
• Multiple Options: Present viable alternatives when applicable
• Thorough Investigation: Use tools to deeply understand existing codebase
• Explicit Gaps: Clearly flag areas needing research or investigation

Tool Guidance

• Read first: Load all context (spec, steering, rules) before analysis
• Grep extensively: Search codebase for patterns, conventions, and integration points
• WebSearch/WebFetch: Research external dependencies and best practices when needed
• Write last: Generate analysis only after complete investigation

Output Description

Provide output in the language specified in spec.json with:

1. Analysis Summary: Brief overview (3-5 bullets) of scope, challenges, and recommendations
2. Document Status: Confirm analysis approach used
3. Next Steps: Guide user on proceeding to design phase

Format Requirements:

• Use Markdown headings for clarity
• Keep summary concise (under 300 words)
• Detailed analysis follows gap-analysis.md output guidelines

Safety & Fallback

Error Scenarios

• Missing Requirements: If requirements.md doesn't exist, stop with message: "Run /prompts:kiro-spec-requirements {{arg1}} first to generate requirements"
• Requirements Not Approved: If requirements not approved, warn user but proceed (gap analysis can inform requirement revisions)
• Empty Steering Directory: Warn user that project context is missing and may affect analysis quality
• Complex Integration Unclear: Flag for comprehensive research in design phase rather than blocking
• Language Undefined: Default to Japanese if spec.json doesn't specify language

Next Phase: Design Generation

If Gap Analysis Complete:

• Review gap analysis insights
• Run /prompts:kiro-spec-design {{arg1}} to create technical design document
• Or /prompts:kiro-spec-design {{arg1}} -y to auto-approve requirements and proceed directly

Note: Gap analysis is optional but recommended for brownfield projects to inform design decisions.