brief-product-ui

name	brief-product-ui
description	Designs the in-product interface from a validated map-user-flow — screen inventory, a reusable component system, DESIGN-token application, per-state visual treatments, accessibility floor, and a buildable handoff. Emits a portable SPEC, never rendered UI. Use after a user flow exists and before architect-system. Not for brand identity (create-brand), conversion landing pages (brief-landing-page), or technical architecture (architect-system).
argument-hint	[feature or map-user-flow slug/path]
allowed-tools	Read Grep Glob Bash
metadata	{"version":"1.1.0","budget":"deep","estimated-cost":"$1-3"}

Product-UI Brief — Interface Spec Orchestrator

Design Step between flow and tech. Turns a validated map-user-flow + DESIGN tokens into a screen/component/layout/state spec a design tool or coding agent can build — a portable artifact, not a render.

Core Question: "Could a design tool or coding agent build every screen — branded, state-complete, component-consistent — from this spec without a follow-up question?"

Why, methodology, principles: references/playbook.md [PLAYBOOK].

When To Use

Design the in-product screens/components/layout for a feature whose flow is already mapped — applying brand tokens, a reusable component system, and per-state visual treatments, then handing off to a build surface.

Not for: flow logic (/map-user-flow, the prerequisite) · brand identity (/create-brand) · conversion landing pages (/brief-landing-page) · API/schema/tech (/architect-system) · decomposition (/breakdown-tasks).

Why this exists (not a renderer). External taste skills (impeccable / hallmark / stitch / frontend-design) render. This skill emits a portable, brand-tokened, flow-grounded, reviewable spec under docs/forsvn/artifacts/product/, then hands off to any of them. The --render/--api → BLOCKED gate is the identity guarantee. If you want pixels, take the handoff fork.

Critical Gates — Read First

1. No design before a validated flow. A parseable map-user-flow artifact must exist → else NEEDS_CONTEXT.
2. No invented screens. Every screen/state/surface traces to a flow screen/state/edge.
3. Spec, never render. --render/--api → BLOCKED. This skill emits a buildable spec; drive it through a tool via the handoff fork.
4. Tokens, not raw values. Every color/space/type/radius references a DESIGN token; brand rules hold when the house brand is the source; tokens absent → brand_source: cold-start-hint.
5. Every state gets a visual treatment. Full state set per interactive element; every screen's empty/loading/error specified, not "show error."

Full rationale + the 8-checkpoint critic rubric: references/procedures/gates-and-rubric.md [PROCEDURE].

Quality Gate

Critic (agents/critic-agent.md) runs an 8-checkpoint rubric, each binary PASS/FAIL — all must PASS:

• CP-01 Flow grounding · CP-02 Component reuse & hierarchy · CP-03 Token fidelity · CP-04 Layout system · CP-05 State coverage · CP-06 Accessibility floor · CP-07 Handoff readiness · CP-08 No-render discipline

Full checkpoint detail + rewrite routing: references/procedures/gates-and-rubric.md.

Before Starting

Apply references/_shared/before-starting-check.md [PLAYBOOK]. budget: deep; --fast collapses Layer 1 to single-pass per references/_shared/mode-resolver.md [PROCEDURE]. Safety gates supersede --fast. Session execution profile (single-vs-multi): inherit per references/_shared/execution-policy.md.

Artifact	Source	Required?
docs/forsvn/artifacts/product/flow/<slug>.md	map-user-flow	Hard — the flow is the contract (resolved via manifest.json); absent → NEEDS_CONTEXT
brand/{DESIGN,BRAND}.md	create-brand	Soft — absent → brand_source: cold-start-hint
research/product-context.md	research-icp	Optional — usability priorities

Pre-Dispatch

Dimensions: feature, flow artifact (path), target surfaces (from the flow), brand source, target build engine (design tool / coding agent / Figma), constraints. Read order + Warm/Cold Start prompts + write-back: references/procedures/pre-dispatch.md [PROCEDURE].

Artifact Contract

• Path: docs/forsvn/artifacts/product/brief-product-ui-<YYYY-MM-DD>-<slug>.md (by-stack v3; stack: product; one file per feature). Lifecycle: pipeline.
• Frontmatter: skill, version, date, status, stack: product, type, id, keywords, review_surface: html (FIRE preview while decision_state: pending), decision_state, source_flow, brand_source, plus manifest-sync lifecycle, produced_by, provenance. Schema: references/_shared/artifact-contract-template.md.
• Sections (9, in order) + per-section template: TL;DR · Screen Inventory · Component System · Token Application Map · Per-Screen Layout Spec · Interaction & State Spec · Accessibility Notes · Handoff · What NOT To Render. Full template: references/format-conventions.md [PROCEDURE].
• Consumed by: architect-system (tech follows UI), breakdown-tasks, a coding agent / design tool.

Tooling

Production mode can run inside a connected design tool (Figma / Stitch / Open Design) or emit a portable spec. Upstream choice (default = portable spec): references/_shared/tool-redirect.md. Terminal handoff, category design: references/_shared/execution-fork.md. Live-drive upstream pre-answers the terminal fork — don't ask twice. When not live-driving, bind the design target tool at brief-binding (the build surface the spec's handoff tunes to) — inherit tool_targets or ask once per references/_shared/tool-target.md; the portable spec stays the default.

Routing + Dispatch

Single route, full stack. Pipeline: Step 0 (intake-validator gate) → L1 ∥ (screen-inventory ∥ component-system ∥ token-application) → Merge → L2 seq (layout-state) → L3 (handoff) → L4 (critic). Critic FAIL re-dispatches the named agent (max 2 cycles).

Agent roster + dispatch graph: references/agent-manifest.md. Spawn mechanics + Single-Agent Fallback: references/procedures/dispatch-mechanics.md [PROCEDURE]. Worked example: references/examples/saas-dashboard-walkthrough.md [EXAMPLE].

Anti-Patterns

10-pattern catalog (invented screens, rendering instead of speccing, raw hex/px, per-screen component one-offs, "show error" hand-waving, skipped accessibility floor + 4 cross-cutting): references/anti-patterns.md [ANTI-PATTERN].

Chain Position

Prev: map-user-flow (required) ← create-brand (optional tokens). Next: architect-system → breakdown-tasks, or the handoff fork to a build surface. Defer to: map-user-flow, create-brand, brief-landing-page. Re-run on: flow changes, token/brand changes, new surfaces.

Durable Rules (protected)

Completion Status

• DONE — every flow screen specified with components, tokens, layout, full states, accessibility floor, and a buildable handoff; critic PASS (all 8 CPs).
• DONE_WITH_CONCERNS — delivered but a surface is under-specified (e.g., responsive behavior unverified, cold-start tokens); flagged inline; or critic FAILed twice with annotations.
• BLOCKED — --render/--api requested, or the spec cannot be built without rendering.
• NEEDS_CONTEXT — no map-user-flow artifact; recommend /map-user-flow.