Plan complex features by decomposing them into vertical slices (one slice equals one phase) with developer micro-checkpoints between phases, producing an implement-ready phased plan in .rpiv/artifacts/plans/. Use for complex multi-component features touching 6+ files across multiple layers when iterative review between slices is valuable. Optionally consumes a research/solutions artifact; can also run standalone with a free-text feature description for small tasks. Prefer blueprint over plan when mid-flight micro-checkpoints matter, and prefer plan when a straightforward phased breakdown is enough.
Answer structured research questions about a codebase using targeted parallel analysis agents, then synthesize findings into a research document in .rpiv/artifacts/research/. Internally dispatches the scope-tracer agent to formulate trace-quality research questions, then answers them. Use when the user wants in-depth research on a codebase area, asks to "research X", or needs answers to architecture or behavior questions before designing changes.
Surgically update an existing implementation plan in .rpiv/artifacts/plans/ based on review feedback, mid-implementation discoveries, or new constraints, preserving structure and quality rather than rewriting. Use when the user wants a plan adjusted after code-review feedback, has hit a blocker mid-implement, scope changed, or asks to "revise the plan".
Conduct a top-down, layer-by-layer architecture review of a software module by reading every file in scope, running a uniform 10-dimension checklist per layer, and triaging each candidate finding through a structured developer checkpoint. Produces a phased polish plan in .rpiv/artifacts/architecture-reviews/ that blueprint can consume per phase. Language-agnostic — works on TypeScript, Java, .NET, Rust, Python, Go, or any other typed module. Use before a 1.0 release, after a major refactor, or when a module has grown enough to warrant a structural audit.
Conduct comprehensive code reviews of pending changes, a branch, or a PR using parallel specialist agents that audit the diff, compare against peer code, and verify claims. Use when the user asks to 'review this', wants pending changes, a PR, a branch, or a diff reviewed, or asks for a code review. Produces review documents in .rpiv/artifacts/reviews/. Internal mechanics like row-only agent contracts and Gap-Finder set arithmetic are documented in the skill body.
Create a context-preserving handoff document for session transitions, compacting the current task, decisions made, in-flight changes, and open questions into a single concise file so a fresh session can pick up where this one left off. Use when the user invokes /create-handoff, says context is getting large, asks to wrap up the session, or wants to hand off work to another session.
Execute an approved implementation plan from .rpiv/artifacts/plans/ phase by phase, applying changes and verifying each phase against its success criteria before moving on. Use when the user invokes /implement, asks to "implement this plan", or wants an existing phased plan executed. Pair with revise to update plans mid-flight and validate to confirm completion.
Verify that an implementation plan was correctly executed by running each phase's success criteria against the working tree and producing a validation report. Use after the implement skill completes, when the user asks to "validate the plan", wants a post-implementation audit, or needs to confirm a feature is fully shipped per its plan.