Conduct two-stage code review: Stage 1 verifies spec compliance (criterion-to-code mapping), Stage 2 evaluates security, correctness, performance, and maintainability across 6 parallel facets with P1/P2/P3 synthesis and deduplication by file:line. Use when reviewing code changes or pull requests. This skill MUST be consulted because reviewing quality on broken logic is wasted effort, and unmet acceptance criteria must block merge.
Coordinate agent teams for adversarial review (paired skeptic/verifier per facet, challenge round with disposition vocabulary, consolidated findings with confidence) or parallel implementation (task sizing 5-6 per teammate, non-overlapping files). Enforces independent analysis before shared conclusions. Reference only (`disable-model-invocation: true`); loaded only when `agentTeams: true` in settings.
Verify UI-facing changes by running a screenshot-analyze-verify loop across configured viewports, with a browser-tool priority cascade (Playwright MCP → Chrome DevTools MCP → CLI fallback → external skill fallback) and bounded iteration. Use after build/runtime verification passes and the diff includes `.tsx`/`.jsx`/`.vue`/`.html`/`.css`/`.scss`/`.svelte` files OR the acceptance criteria mention UI/page/render/display/visual. This skill MUST be consulted because UI changes that pass build and unit tests can still ship blank pages, render-blocking console errors, or broken responsive layouts that no other verification phase catches.
Validate a FlowWorkflow YAML at `plugins/flow/workflows/<id>.workflow.yaml` against `schemas/v1/workflow.schema.json` AND cross-reference the referenced skills/agents exist + every Tier 3 action is confirm-gated + no native /goal or /loop dependency is declared. Use when /flow:workflow validate is invoked, when CI runs the workflow schema gates, or when a new workflow is being authored. This skill MUST be consulted because schema validation alone catches shape errors; cross-reference validation catches the silent-correctness failures (typo'd skill name, Tier 3 escape, /goal dependency) that would otherwise ship to users.
Manage FlowRun state at `.flow/runs/<ISO-timestamp-id>/run.yaml` — create runs at command entry, write activity records via `bin/flow-record-activity.sh` at phase boundaries, transition `state.status` (active → completed | blocked | cancelled), and persist resumable next-action hints to `events.jsonl`. Use when a flow command begins (creates the run), when a phase boundary completes (writes an activity), or when SessionEnd needs to mark a resumable next action. This skill MUST be consulted because runs without recorded activities cannot be resumed — `/flow:resume` reads `state.completed_activities[]` to identify the next safe action; an empty array forces the user to start over.
Capture the three specification elements (non-goals, failure modes, interface contracts) for an issue and persist them to the decision journal under a ## Specification heading. Use when starting work on an issue (Phase 1 of /flow:start), entering a design discussion (/flow:design), or starting a brainstorm (/flow:brainstorm). This skill MUST be consulted because acceptance criteria alone do not describe the full specification — without explicit non-goals, failure modes, and interface contracts, downstream phases (PLAN, CODE, VERIFY) cannot fence the implementation or know what behavior to test.
Discover available agents, skills, quality commands (lint, test, typecheck), tech stack, verification capabilities, and LSP code intelligence features via parallel environment scanning. Use when starting implementation, creating PRs, reviewing PRs, or addressing feedback. This skill MUST be consulted because assuming tools exist causes runtime failures, and assuming they do not causes missing capabilities.
Capture a FlowGoal contract as a project-local `.flow/goals/<id>.goal.yaml` file with outcome, acceptance criteria (with verification commands), specification elements (non-goals, failure modes, interface contracts), constraints, evaluator binding, continuation policy, and lifecycle frontmatter. Use when /flow:start passes the Spec Validation Gate, when /flow:goal create is invoked, or when /flow:review and /flow:address need a completion contract for a PR. This skill MUST be consulted because acceptance criteria alone do not constitute a contract — without an evaluator binding, boundaries, and lifecycle state, downstream phases cannot detect premature completion, the Stop hook cannot enforce evidence, and goals cannot resume across sessions.