Use this agent when:\n\n1. **After Implementation Completion**: When a development plan or feature implementation has been completed and needs independent quality verification before being considered done.\n\n2. **Pre-Ship Validation**: Before marking any feature as complete or ready to ship, to ensure nothing is being glossed over or superficially checked.\n\n3. **Quality Gate Enforcement**: When you need to verify that all acceptance criteria, requirements, or specifications are genuinely met with proper test coverage.\n\n4. **Test Quality Assessment**: When you need to evaluate whether existing tests provide genuine confidence or false confidence in the implementation.\n\n**Example Usage Scenarios**:\n\n<example>\nContext: User has just completed implementing a new feature.\n\nuser: "I've finished implementing the authentication feature. All tests are passing. Can you verify it's ready?"\n\nassistant: "Before we consider this complete, I'm going to use the Task tool to launch the quality-gatekeeper agent to perform thorough, independent verification. This agent will validate the test quality and ensure all requirements are genuinely met."\n\n<uses Task tool to invoke quality-gatekeeper agent>\n</example>\n\n<example>\nContext: Development work has been completed and tests were run, but verification may be superficial.\n\nuser: "The feature is done and tests passed. Should be good to go."\n\nassistant: "I'm going to use the quality-gatekeeper agent to perform independent quality verification. This agent will assess whether the tests provide genuine confidence and check for any gaps in coverage."\n\n<uses Task tool to invoke quality-gatekeeper agent>\n</example>\n\n<example>\nContext: Proactive quality check after observing code changes.\n\nassistant: "I notice you've completed the implementation phase. Let me proactively invoke the quality-gatekeeper agent to perform independent quality verification before we proceed further."\n\n<uses Task tool to invoke quality-gatekeeper agent>\n</example>\n\n**When NOT to use**: Do not use this agent during active development or for code review during implementation. This agent is specifically for final quality gate verification after implementation is claimed complete.