---
date: '2026-02-12T21:35:00Z'
author: claude-opus-4-6
session: session_01MGZaQAV8JVt7a8ffYzcbSg
type: handoff
importance: 0.6
tags: [handoff, design-system, agent-identity, animation, svg]
supersedes: null
signature: pending
---

# Handoff: Agent Identity Visualisation Components

## What Was Done This Session

- **New design-system components** for visualising agent identity from Ed25519 public keys:
  - `agent-identity-params.ts` — deterministic derivation of visual parameters (ring count, hues, stroke widths, rotation speeds, sinusoidal deformations, pulse rate, glow) from raw key bytes
  - `AgentIdentityMark.tsx` — animated SVG component: glowing amber core, 3–6 concentric deformed rings in the teal spectrum, CSS keyframe animations for rotation and breathing pulse
  - `AgentIdentityShowcase.tsx` — side-by-side demo of three agent marks with live key display
  - Exported all new components from the design-system barrel
- **Unit tests** (23 tests) covering the pure derivation functions:
  - Determinism (same key → same output)
  - `ed25519:` prefix stripping
  - Ring count bounds (3–6)
  - Per-ring property ranges (hue, saturation, lightness, direction, deformFrequency, radiusFraction ordering)
  - Global param ranges (pulseRate, glowIntensity, coreHue)
  - ID prefix format (`mid-[0-9a-f]{8}`) and uniqueness
  - SVG path generation (closed path, perfect circle at amplitude=0, deformed ring bounds, segment count)
  - `identityColor` HSLA formatting

## What's Not Done Yet

- No visual regression / snapshot tests for the rendered SVG (would require a DOM environment like jsdom or a screenshot tool)
- Showcase not wired into the landing page or a Storybook-like viewer
- Animation performance not profiled on low-end devices
- Accessibility: `role="img"` and `aria-label` are set, but reduced-motion media query not yet implemented

## Current State

- **Branch**: `claude/animate-agent-actions-isamf`
- **Tests**: 35 passing (23 new + 12 existing), 0 failing
- **Lint**: warnings only (pre-existing), 0 errors
- **Typecheck**: clean
- **Build**: clean
- **Validation**: `pnpm run validate` passes

## Decisions Made

- Used pure functions (`deriveIdentityParams`, `generateDeformedRingPath`) separated from the React component to enable testing without a DOM
- Visual parameters derived directly from raw key bytes (base64-decoded) — no hashing step, so the derivation is transparent and inspectable
- Ring hues centred on teal (150–210), core hues on amber (30–58) — matching the MoltNet brand palette
- CSS `@keyframes` for animation rather than JS `requestAnimationFrame` — GPU-composited, no React re-renders
- Sinusoidal radial deformation for ring paths rather than noise — deterministic and cheap to compute

## Open Questions

- Should the showcase be added to the landing page, or kept as a design-system-only demo?
- Should `prefers-reduced-motion` disable ring rotation entirely or just slow it down?

## Where to Start Next

1. Read this handoff
2. If integrating into landing: import `AgentIdentityMark` into the landing app and wire it to real or demo public keys
3. If adding reduced-motion: wrap the CSS animations in a `@media (prefers-reduced-motion: reduce)` block
4. Consider adding the showcase to the design-system `demo` script (`pnpm --filter @moltnet/design-system demo`)
