description: Validate implementation against requirements, design, and tasks
allowed-tools: Bash, Glob, Grep, Read, LS
argument-hint: [feature-name] [task-numbers]
Implementation Validation
- Mission: Verify that implementation aligns with approved requirements, design, and tasks
- Success Criteria:
- All specified tasks marked as completed
- Tests exist and pass for implemented functionality
- Requirements traceability confirmed (EARS requirements covered)
- Design structure reflected in implementation
- No regressions in existing functionality
Core Task
Validate implementation for feature(s) and task(s) based on approved specifications.
Execution Steps
1. Detect Validation Target
If no arguments provided ($1 empty):
- Parse conversation history for
/kiro:spec-impl <feature> [tasks] commands
- Extract feature names and task numbers from each execution
- Aggregate all implemented tasks by feature
- Report detected implementations (e.g., "user-auth: 1.1, 1.2, 1.3")
- If no history found, scan
.kiro/specs/ for features with completed tasks [x]
If feature provided ($1 present, $2 empty):
- Use specified feature
- Detect all completed tasks
[x] in .kiro/specs/$1/tasks.md
If both feature and tasks provided ($1 and $2 present):
- Validate specified feature and tasks only (e.g.,
user-auth 1.1,1.2)
2. Load Context
For each detected feature:
- Read
.kiro/specs/<feature>/spec.json for metadata
- Read
.kiro/specs/<feature>/requirements.md for requirements
- Read
.kiro/specs/<feature>/design.md for design structure
- Read
.kiro/specs/<feature>/tasks.md for task list
- 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)
3. Execute Validation
For each task, verify:
Task Completion Check
- Checkbox is
[x] in tasks.md
- If not completed, flag as "Task not marked complete"
Test Coverage Check
- Tests exist for task-related functionality
- Tests pass (no failures or errors)
- Use Bash to run test commands (e.g.,
npm test, pytest)
- If tests fail or don't exist, flag as "Test coverage issue"
Requirements Traceability
- Identify EARS requirements related to the task
- Use Grep to search implementation for evidence of requirement coverage
- If requirement not traceable to code, flag as "Requirement not implemented"
Design Alignment
- Check if design.md structure is reflected in implementation
- Verify key interfaces, components, and modules exist
- Use Grep/LS to confirm file structure matches design
- If misalignment found, flag as "Design deviation"
Regression Check
- Run full test suite (if available)
- Verify no existing tests are broken
- If regressions detected, flag as "Regression detected"
4. Generate Report
Provide summary in the language specified in spec.json:
- Validation summary by feature
- Coverage report (tasks, requirements, design)
- Issues and deviations with severity (Critical/Warning)
- GO/NO-GO decision
Important Constraints
- Conversation-aware: Prioritize conversation history for auto-detection
- Non-blocking warnings: Design deviations are warnings unless critical
- Test-first focus: Test coverage is mandatory for GO decision
- Traceability required: All requirements must be traceable to implementation
Tool Guidance
- Conversation parsing: Extract
/kiro:spec-impl patterns from history
- Read context: Load all specs and steering before validation
- Bash for tests: Execute test commands to verify pass status
- Grep for traceability: Search codebase for requirement evidence
- LS/Glob for structure: Verify file structure matches design
Output Description
Provide output in the language specified in spec.json with:
- Detected Target: Features and tasks being validated (if auto-detected)
- Validation Summary: Brief overview per feature (pass/fail counts)
- Issues: List of validation failures with severity and location
- Coverage Report: Requirements/design/task coverage percentages
- Decision: GO (ready for next phase) / NO-GO (needs fixes)
Format Requirements:
- Use Markdown headings and tables for clarity
- Flag critical issues with ⚠️ or 🔴
- Keep summary concise (under 400 words)
Safety & Fallback
Error Scenarios
- No Implementation Found: If no
/kiro:spec-impl in history and no [x] tasks, report "No implementations detected"
- Test Command Unknown: If test framework unclear, warn and skip test validation (manual verification required)
- Missing Spec Files: If spec.json/requirements.md/design.md missing, stop with error
- Language Undefined: Default to English (
en) if spec.json doesn't specify language
Next Steps Guidance
If GO Decision:
- Implementation validated and ready
- Proceed to deployment or next feature
If NO-GO Decision:
- Address critical issues listed
- Re-run
/kiro:spec-impl <feature> [tasks] for fixes
- Re-validate with
/kiro:validate-impl [feature] [tasks]
Note: Validation is recommended after implementation to ensure spec alignment and quality.