Frontend Platform Architecture Review

Frontend Platform Architecture Review

Purpose

Review proposed or existing frontend architecture — module/package boundaries, monorepo topology, rendering-strategy choice, technology adoption — for duplication, migration safety, and cross-team consistency, without re-litigating implementation-level state-management, routing, API-contract, or SSR-mechanics detail in every response. This skill exists so those adjacent concerns stay out of scope and the review stays focused on the cross-cutting, org-level decision: should this architectural change be approved, and on what terms.

When to use

Use this skill when the user asks to:

• review a proposal to adopt a new frontend framework, library, or build tool,
• resolve two teams solving the same problem with different primitives (state management, routing, styling),
• redraw a monorepo/polyrepo module boundary or ownership line,
• review a rendering-strategy change (CSR to SSR, SSR to SSG/ISR/streaming/PPR),
• audit an existing codebase for architectural entropy before a scaling or hiring push.

Do not use this skill for:

• implementation-level state-management review — route to state-management-decision-review,
• routing/navigation-specific review — route to routing-navigation-review,
• API-contract or data-fetching review — route to api-integration-contract-review,
• SSR/hydration mechanics debugging — route to ssr-hydration-streaming-diagnosis,
• responsive/visual UI design review — that needs a design-system/visual skill, not architecture review.

Context7 Documentation Protocol

• Before evaluating any version-sensitive technical claim in the proposal (e.g., "Next.js Partial Prerendering lets us do X," "React 19 Suspense enables Y"), call resolve-library-id for the exact library, then query-docs against the repo's confirmed version — read package.json first to confirm the installed major version before trusting a claim about API availability.
• Matched library IDs for this skill's default grounding: React is /reactjs/react.dev, Next.js is /vercel/next.js. Resolve fresh for any other framework named in a proposal (Angular, Vue, SvelteKit, etc.) rather than assuming these two cover every case.
• Never approve a version-sensitive technical claim without Context7 verification. If Context7 is unavailable, mark the claim documentation-based — unverified this session in the verdict and require the proposer to confirm the claim before final approval.
• Documentation proves what a framework supports; it does not prove the proposal's specific repo can adopt it safely. Pair every Context7-grounded capability claim with a repo-evidence check (actual installed version, actual existing patterns) before treating it as settled.

Lean operating rules

• First classify the proposal: new capability, migration of an existing capability, or boundary redraw. Do not evaluate a migration as if it were greenfield.
• Check for an existing in-repo equivalent before evaluating the proposal on its own terms. A proposal that duplicates a capability the repo already solves is a duplication defect regardless of how well-argued the new approach is.
• Require at least two alternatives with tradeoffs before treating a single-option proposal as reviewable. A proposal with no alternatives considered is not ready for an architecture verdict — send it back.
• Default against "rewrite" framing. If an incremental strangler-fig or boundary-first path exists, require it over a big-bang rewrite; do not accept "the codebase is too messy to migrate incrementally" without the proposer demonstrating why.
• Treat accessibility and security posture as first-class, blocking review criteria — not items to defer to a follow-up ticket. An architecture proposal silent on a11y/security is incomplete, not merely imperfect.
• Treat Core Web Vitals budget impact as mandatory for any rendering-strategy change; a proposal with no stated LCP/INP/CLS impact (lab or field) has not been evaluated for its primary tradeoff.
• Never fabricate a performance or vitals number without a stated measurement source; label estimates inference, not measured and require the proposer to supply lab or field data before final approval.
• Never execute, build, or run application code as part of this review; this is a static-review skill (Read/Grep/Glob only) — verdicts are based on document, code, and config evidence, not live measurement you generate yourself.
• Flag any architecture proposal that stores secrets or tokens in client-reachable bundles or build-time-inlined env vars, allows postinstall scripts from unpinned/unaudited dependencies, or introduces a CSP-incompatible pattern (unsafe-eval, dynamic Function()) as a blocking finding, not a note — this cannot be approved-with-conditions into a later cleanup.

References

Load these only when needed:

• Review workflow and ADR output contract — use for the step-by-step review procedure, the approve/approve-with-conditions/reject decision tree, and the required ADR-format output shape.
• Rendering topology and cross-cutting budgets — load only when the proposal changes rendering strategy (CSR/SSR/SSG/ISR/streaming/PPR) or when Core Web Vitals, a11y, or security posture needs grounding against current framework/WCAG guidance.

Response minimum

Return, at minimum:

• the architectural change and files/modules/teams in scope,
• duplication check result (existing in-repo equivalent found or none),
• every version-sensitive claim labeled Context7-verified or documentation-based — unverified this session,
• verdict (approve / approve-with-conditions / reject-with-reasoning) with the specific unresolved conditions if any,
• rollback or incremental-migration path referenced explicitly,
• open questions the review could not resolve from available evidence.