agh-design

name	agh-design
description	AGH visual-design authority for production UI, static artifacts, prototypes, and reviews. Use when creating or reviewing an AGH surface or changing tokens, typography, spacing, depth, icons, or motion. Do not use for capture-only verification; use agh-ui-screenshot.

AGH Design

Use the canonical visual authorities before making AGH design decisions.

Authority

1. packages/ui/src/tokens.css: canonical token source consumed by Tailwind v4.
2. DESIGN.md: rationale, generated token tables, anti-patterns, and semantic component contracts.
3. packages/ui/src/index.ts: the @agh/ui surface contract — the canonical primitive inventory.
4. packages/ui/src/components/**/*.tsx: canonical production recipes.
5. COPY.md: product voice, terms, and public claim rules.

Top-of-mind invariants

• Dark mode only; warm-dark surface ramp; one --color-accent target per viewport.
• Flat depth model; use --shadow-overlay for overlays and --shadow-highlight for active rims.
• Pull values from --color-*, --text-*, --radius-*, --duration-*, and --shadow-* tokens; do not hardcode production hex or one-off sizes.
• <Eyebrow> is the only uppercase label contract; do not inline typography tuples for labels.
• See DESIGN.md section 10 for the anti-pattern list and lint/test guardrails.

Named visual contracts

When a task or spec names an OpenDesign artifact, mock, screenshot, or other trusted visual reference, activate agh-ui-screenshot before implementation and follow its Visual Contract Mode. Implement from the rendered reference, not source inspection alone; an implementation-only screenshot never proves parity. The reference is normative for visual language — layout, anatomy, typography, tokens, motion — and lossy for everything else: content, data, copy, brand marks, and which controls exist stay with runtime truth, COPY.md, and the brand inventory, recorded as authorized differences.

Static HTML artifacts

Inline or import actual values from packages/ui/src/tokens.css. Mirror the class structure and component anatomy in packages/ui/src/components where possible. Keep artifacts dark, flat, and functional. Use literal CSS only to represent exported token values; do not invent a parallel palette.

Production code

Reuse gate — before authoring any component, map every generic UI need against packages/ui/src/index.ts and import the primitive from @agh/ui instead of re-implementing it. Redefining an exported name in web/ or packages/site/ fails lint (compozy-ui-reuse/no-shadow-ui-primitive); genuinely domain-specific variants take a domain-prefixed name. New generic primitives land in packages/ui with story + test; domain composites in web/src/systems/<domain>/.

Edit the owning surface: web/, packages/ui/, or packages/site/. Consume CSS variables and bare Tailwind v4 token utilities. If tokens.css or packages/site/app/global.css changes, run make codegen and then make codegen-check so DESIGN.md stays synchronized.

Completion Criterion

The change is complete when it uses the canonical tokens and primitive owner, introduces no parallel palette or shadow primitive, respects the owning surface's instructions, regenerated design artifacts have no drift when a token source changed, and every named visual contract has a passing evidence bundle with zero unresolved blocking divergence.

Error Handling

• DESIGN.md and runtime tokens disagree: treat packages/ui/src/tokens.css as source, run codegen, and inspect the regenerated spec rather than editing generated regions.
• No exported primitive fits: decide whether the need is generic or domain-specific; add generic primitives to packages/ui and domain composites to the owning Web system.
• A plausible mock implies unsupported runtime behavior: remove the unsupported control or metric; daemon truth wins.
• Runtime truth conflicts with a normative visual reference: follow runtime truth, record the contract conflict, and reconcile or explicitly authorize the reference delta before claiming parity.
• The reference shows placeholder art, demo data, or omits product content: a prototype is lossy — keep the canonical owner (brand inventory, runtime truth, existing views), record the authorized difference, and never grow an @agh/ui brand primitive or delete product content to match a mock.