Effect v4 beta cuts size, unifies TypeScript ecosystem

Effect v4 is the "mainstream-ready" moment for functional programming in TypeScript, finally shedding the "heavyweight" label that hindered its adoption. The 70% bundle size reduction removes the primary barrier for frontend teams who previously found Effect too bloated for browser use. Moving to a unified package structure eliminates "dependency sprawl" and simplifies version management across the ecosystem. The introduction of effect/unstable namespaces allows for rapid API iteration without breaking semver stability for mature features. Structured error handling and built-in dependency injection are becoming the gold standard for building reliable, non-failing AI agents.