fix: [avatar] order-sensitive getAvatarColor hash, add seed and palette options

[Shreyag02]

Summary

• getAvatarColor summed char codes, so letter order did not matter and anagrams always collided ("abc" and "cba" were both iris). It now uses 32-bit FNV-1a from a new internal shared/hash, with no new dependency. The data-view test helper uses the same function, and its digests are unchanged.
• Adds getAvatarColor(str, { seed, palette }). seed maps the same string to a different color. palette restricts the result, ignores duplicate and unknown colors, and falls back to all colors (with one warning in development) if none remain.
• Exports AVATAR_COLOR_PALETTE and GetAvatarColorOptions. A test checks that every palette color has an Avatar color variant.
• Behavior change: most strings map to a new color. "abc" and "cba" are now cyan and orange, and "john.doe@example.com" changes from neutral to pink. Apps that store colors are unaffected. Apps that compute them at render time will see new colors once.
• Not changed: 'neutral' is in the default palette, is the AvatarGroup overflow color, and is the color of the empty string. Consumers can pass AVATAR_COLOR_PALETTE.filter(c => c !== 'neutral') to avoid confusion.

Closes #850

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Project	Deployment	Actions	Updated
apsara	Ready	Preview	Oct 1, 2026 5:01am UTC

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📝 Walkthrough

Walkthrough

getAvatarColor now uses FNV-1a hashing and accepts optional seed and palette settings. The change exports the hash function, the full avatar palette, and the options type. Palette entries are deduplicated and filtered; if none are valid, the full palette is used, with a one-time development warning. Tests cover hashing, avatar color selection, options, and rendering. The avatar documentation and demo now describe and show these options.

Suggested reviewers: rohanchkrabrty

Priority: ⬇️ Low

Severity of issue fixed: Low

Merge Risk: 🔵 Low · up to aa66f

Seeded avatar colors can still change when people rename themselves. This is a bounded visual defect; use the seed independently of the name to satisfy the intended behavior.

Security Architecture Review

Security architecture risk: 🔵 Low · up to aa66f

The inspected behavior remains presentation-only, with no demonstrated increase in privileges or access to sensitive data. Risk is limited to public-contract changes, a shared-palette mutability caveat, and uncertainty about external consumers.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• inferred — The demonstrated reach is avatar presentation within consuming JavaScript applications. Mutating the exported palette requires execution in the same JavaScript environment and could affect color selection across that module's consumers, but the inspected flow does not establish tenant, service, credential, or data-store exposure.

Trust Boundaries and Controls

• observed — Caller-controlled palette entries are copied, deduplicated, and checked against the initialized color set before selection. String and seed inputs influence only the palette index in the inspected path; neither becomes executable markup, an image source, or an authorization decision.

Resilience and Maintainability Implications

• observed — Palette resolution is synchronous and does not mutate ordinary caller arrays. The module-local warning flag changes only development diagnostics; repeated invalid palettes continue to fall back, and subsequent valid palettes are resolved independently. There is no asynchronous reservation, persistence, or cleanup transition in this helper.

Hardening Proposals

• proposed — Consider runtime-freezing the canonical palette or separating internal palette state from the consumer-visible array to contain accidental cross-consumer mutations. This protects a presentation invariant, not an evidenced security boundary.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	The PR satisfies the getAvatarColor objectives in [#850]. utils.tsx uses order-sensitive 32-bit FNV-1a hashing. It supports seed and palette filtering. Tests cover anagrams, seeds, palette subse…	Add the optional seed and palette inputs to Avatar and use them when Avatar selects an automatic color. Add component tests that verify seed stability and palette restriction. If Avatar is intentionally out of scope, update the linked…
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 10 files. (1 skipped: …	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Out of Scope Changes check	✅ Passed	The changed files support the linked objective. The shared fnv1a module implements the new hash and its tests validate incremental hashing. The data-view helper reuses that shared hash. Avatar tests…
Title check	✅ Passed	The title clearly identifies the main changes: an order-sensitive getAvatarColor hash plus seed and palette options.
Description check	✅ Passed	The description directly explains the hash change, new options, exports, behavior changes, tests, and linked issue.

Full details: Linked Issues check

Explanation

The PR satisfies the getAvatarColor objectives in [#850]. utils.tsx uses order-sensitive 32-bit FNV-1a hashing. It supports seed and palette filtering. Tests cover anagrams, seeds, palette subsets, and fallback behavior. The PR does not satisfy the requested Avatar automatic-color API. avatar.tsx has no seed or palette props, and AvatarRoot does not call getAvatarColor; color remains an explicit prop with an indigo default. The PR adds no Avatar integration tests for seed or palette behavior.

Resolution

Add the optional seed and palette inputs to Avatar and use them when Avatar selects an automatic color. Add component tests that verify seed stability and palette restriction. If Avatar is intentionally out of scope, update the linked issue or PR scope before treating this issue as complete.

Full details: Docstring Coverage

Explanation

Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 10 files. (1 skipped: 1 unsupported.)

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commit: aa66fe1

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @packages/raystack/components/avatar/utils.tsx:
- Around line 55-56: Update the color-selection logic so a supplied seed is
hashed independently of the display name, using the display name only when no
seed is provided; preserve the existing color lookup behavior.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Advanced

Run ID: d09af41d-5bdd-49ad-b4d3-2037a72d98c7

📥 Commits

Reviewing files that changed from the base of the PR and between e9450b6 and aa66fe1.

📒 Files selected for processing (11)

• apps/www/src/content/docs/components/avatar/demo.ts
• apps/www/src/content/docs/components/avatar/index.mdx
• apps/www/src/content/docs/components/avatar/props.ts
• packages/raystack/components/avatar/__tests__/avatar.test.tsx
• packages/raystack/components/avatar/index.tsx
• packages/raystack/components/avatar/utils.tsx
• packages/raystack/components/data-view/__tests__/helpers.ts
• packages/raystack/index.tsx
• packages/raystack/shared/hash/__tests__/hash.test.ts
• packages/raystack/shared/hash/hash.ts
• packages/raystack/shared/hash/index.ts

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