Implement one Azure-backed strangler slice in the target repository after architecture, requirements, Azure review, rollback plan, and touched-seam harnesses are green. Produces tested, observable, reversible code and deployment evidence.
Use before any destructive refactor or UX/backend change to capture the legacy system's current behavior as characterization tests and golden-master fixtures — the safety net that catches regressions. This is the harness gate; it must be green before modernization code begins.
Implement a vetted legacy-web UX slice in the target repository after requirements and touched-seam harnesses are green. Discovers the real frontend stack, changes code test-first, and records implementation evidence before browser validation and review.
Use when starting or resuming a legacy web modernization (UI/UX and/or backend) — routes between renovation phases, tracks state in plan.md, and enforces the harness/test/review gates. Entry point for the harness-driven-renovate workflow.
Use to modernize a legacy backend incrementally using the strangler-fig pattern — route slices of traffic to new event-driven / cloud-native services behind stable seams while the characterization harness guards against regressions. Requires the harness gate to be green.
Use as a mandatory gate before any renovation change is considered done or merged — rigorous review focused on harness regressions, legacy parity, security, and readability. Cross-cutting; invoke on every change. Composes with requesting-code-review / code-review agent.
Use whenever you write new or refactored code during a renovation (frontend or backend) — author tests first (red-green-refactor) and build the automated test coverage the modernized system needs. Cross-cutting; invoke on every code-producing step. Composes with the tdd skill.
Use to modernize a legacy web UI/UX — collapse scroll/popup-heavy, multi-screen flows into a single coherent flow, remove accumulated dead features, and design a realtime operations dashboard. Requires the harness gate to be green before changing behavior.