UI/UX design artifacts reference

Config: design.uiArtifacts in .the-loop/harness-config.yaml. This file codifies how visual UI/UX design is captured, tracked and iterated in the design phase (issue #18), so the essence is not lost.

Why design.md alone is not enough

design.md is markdown + mermaid — perfect for architecture, HLD and LLD. It is the wrong medium for UI/UX design, which is inherently visual. Modern UI/UX design is represented as either:

• Figma files — the design-tool source of truth, shared as a link; and/or
• HTML + CSS + JS prototypes — increasingly how coding agents (e.g. Claude's design artifacts) express a rendered, clickable design that a human can open in a browser.

the-loop treats both as first-class, tracked design-phase artifacts, siblings of design.md — not throwaway attachments. They live in the work item's spec folder, are iterated-until-locked with the designer persona exactly like every other artifact, and are referenced from the ticket (single source of truth).

Where they live

Checked-in visual artifacts live under <specDir>/<id>/<design.uiArtifacts.dir>/ (default docs/specs/<id>/design/):

docs/specs/<id>/
  requirements.md
  design.md                 # architecture / HLD / LLD (markdown + mermaid)
  design/                   # UI/UX design artifacts (this reference)
    dashboard.html          # self-contained HTML+CSS+JS prototype
    checkout.html
    screenshots/            # rendered stills used as evidence
  tasks.md
  execution-log.md

• HTML prototypes are checked in (they are text, diffable, self-contained).
• Figma is a link recorded in design.md's UI/UX design inventory. When a still is useful in the repo (for offline review / evidence), export a frame into design/.
• The inventory table in design.md is the index of every artifact, its type, location or link, the screens/requirements it covers, and its lock status.

RULE: HTML prototypes are self-contained

When the format is html (design.uiArtifacts.format), a prototype is self-contained (design.uiArtifacts.selfContained, default true) — the same constraint Claude design artifacts render under:

• Inline all CSS/JS; embed assets as data: URIs. No external network deps (no CDN scripts, remote fonts, or fetch/XHR) so the file renders standalone in any browser and as a Claude-style artifact.
• Responsive (relative units, flex/grid, max-width:100% on media) and theme-aware (style light and dark) where the product is.
• Keep it a prototype, not production code: it communicates layout, flow, states and interaction — implementation derives from it, it is not lifted verbatim.

The designer iteration loop (iterate-until-locked, applied to visuals)

Visual artifacts obey the same core rule as every artifact in the chain: iterate with feedback until locked (status: approved), then advance. For UI/UX the feedback is on the rendered output, not the raw markup:

flowchart LR
  R["requirements.md<br/>(locked)"] --> G["generate / curate<br/>artifact (html / figma)"]
  G --> V["render it<br/>(browser / Figma)"]
  V --> D{"designer reviews<br/>the rendering"}
  D -- feedback as ticket comments --> G
  D -- approved --> L["lock: status approved<br/>+ screenshot evidence"]
  L --> T["hand off to design.md<br/>+ tasks / implementation"]

1. Generate / curate. Produce the artifact from the locked requirements — an HTML prototype (agent-generated) and/or a Figma file (designer-authored). Record it in design.md's UI/UX inventory as status: draft.
2. Render, don't read. The reviewer looks at the rendered prototype (open the HTML in a browser / view the Figma frame), not the source. Capture a screenshot.
3. Designer review (paper trail). The designer persona (collaborators, role designer) reviews. Every opinion/decision lands as a ticket comment — same paper-trail rule as any human decision. The userInteraction rules apply: give enough context to decide, educate on the low-level design choices.
4. Iterate. Fold feedback back into the artifact (regenerate the HTML / edit the Figma). Changes are edits to the checked-in artifact, not new copies — one canonical version, clean history.
5. Lock. When the designer approves, mark the artifact status: approved in the inventory and record the approver (paper trail). Only then does the design phase advance. This is gated by workflow.requireHumanReviewPerPhase just like design.md.

If no designer is assigned to the work item, the engineer/PM who owns the surface plays that role — the review-until-locked step is what matters, not the title.

Figma ↔ code: which is the source

• Designer-led work: Figma is the source; the link in design.md is canonical, and any checked-in HTML is a derived, illustrative export.
• Agent-led work (no Figma): the self-contained HTML prototype is the source — it is generated, reviewed and locked, and implementation conforms to it.

Either way the locked artifact is the visual contract the implementation must match — the UI/UX analogue of contract-first APIs (reference/testing.md). Design-phase changes edit the artifact; the design review reviews the rendered artifact.

Evidence & hand-off to implementation

• Evidence. With design.uiArtifacts.screenshotEvidence (default true), rendered screenshots of the locked artifact are captured (into design/screenshots/) and embedded in the reviewer briefing (${CLAUDE_PLUGIN_ROOT}/skills/the-loop/templates/pr-briefing.md) so the human sees the intended UI at a glance, mapped to requirements.
• Hand-off. tasks.md references the locked artifact per screen/component; the implementation reproduces it with production components. Visual-regression / snapshot checks (where the stack supports them) assert the built UI against the locked design.
• Accessibility & responsiveness are not traded away (minimalism rule): the locked design states target breakpoints and keyboard/contrast intent, and implementation keeps them.

How this feeds the loop

• Design phase: design.md gains a UI/UX design section — an inventory of the visual artifacts and the flows/states/design-system they cover. The artifacts live in design/ and are locked with the designer before the phase advances.
• Review/evidence: screenshots of the locked artifacts go into the PR briefing.
• Backwards compatible: work items with no user-facing surface (backend, CLI, infra) simply have no design/ folder and an empty/N/A UI/UX section — nothing forces a visual artifact.