Replaces the ad-hoc 14-color hsl palette with a perceptually-even, validated
scheme so agent glyphs are reliably distinguishable:
- cyrb53 deterministic, cross-platform 53-bit hash over a normalized name
(NFC + trim + lowercase + collapse whitespace) — no built-in/rand hash, so
the same name renders the same avatar on every device without persistence.
- 20-color OKLCH palette (12 light / 8 dark), chroma clamped to sRGB, min
pairwise ΔEOK ≈ 0.066: any two entries are identical or clearly distinct —
"almost the same" colors are impossible by construction.
- Disjoint hash-bit channels: base color (20) × gradient partner (2) ×
gradient angle (8) = 320 combinations, so a base-color collision (inevitable
past ~20 agents) is still disambiguated by the gradient — and by the emoji
drawn on top. Text color (black on light ring, white on dark) is
WCAG-checked.
Glyph now renders an explicit solid backgroundColor (fallback + testable) plus
a linear-gradient backgroundImage. avatarStyle() replaces agentGlyphBackground().
client tsc clean, 26 tests pass (avatarStyle determinism/normalization/structure
+ DOM base-color).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
claude_code
62b818bb36