✨ v0.21.0

🎉 Major Release: Architecture Overhaul

A massive overhaul including test framework migration, functional architecture refactor, and significant new features.

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✨ New Features

• Server-Sent Events - Real-time dashboard updates without polling (#148)
• Delete Comparisons - Remove unwanted new screenshots from dashboard (#145)
• TUI Toolkit - Branded CLI output with polished help commands (#141)
• Quiet-by-Default - Cleaner, focused CLI output (#138)
• Observatory Design System - Refreshed reporter UI (#147)

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🐛 Bug Fixes

• Wire authService and projectService into TDD server (#149)
• Fix HTTP keep-alive preventing clean process exit (#146)
• Fix acceptBaseline saving with double .png extension (#144)
• Fix comparison rejection not working in TDD mode (#137)
• Fix undefined dependencies in TddService methods (#136)

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⚙️ Breaking Changes

• Node.js requirement updated to >=22.0.0 (was >=20.0.0)

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♻️ Functional Architecture Refactor

Eliminated thin service wrapper classes and rebuilt around functional modules with explicit dependency injection.

New Module Structure

Module	Location	Purpose
API	src/api/	createApiClient(), endpoints, request handling
Auth	src/auth/	createAuthClient(), login/logout, token refresh
Config	src/config/	Config merging, serialization, validation
Project	src/project/	Project operations, status updates
TDD	src/tdd/	Comparisons, baselines, hotspots, results
Report	src/report-generator/	HTML report generation
Server	src/screenshot-server/	HTTP handling, middleware

Migration Guide

// Old (deprecated, still works)
import { createServices } from '@vizzly-testing/cli'
const services = createServices(config)
await services.apiService.request(...)

// New (recommended)
import { createApiClient, getBuild } from '@vizzly-testing/cli/api'
const client = createApiClient(config)
const build = await getBuild(client, buildId)

🧪 Test Framework Migration

Migrated from Vitest to Node.js 22+ built-in test runner with c8 for coverage.

Coverage Improvements

Metric	Before	After
Lines	~30%	87%
Functions	~25%	91%
Branches	~40%	95%

1,432 tests with full coverage of all CLI commands, API client, auth, config, TDD service, and error handling.

📊 Stats

• ~30,000 insertions / ~21,000 deletions
• ~700 lines removed from services layer
• Service wrappers removed: ApiService, AuthService, ConfigService, ProjectService, BuildManager
• All public APIs remain backward compatible