Reduce cold-start dev compile time by seeding dev bundler cache

Frontend engineers—especially teams working in large monorepos or on cloud/remote development environments—routinely lose flow to cold-start compile times that can stretch from a minute to many minutes per environment spin-up. With roughly 12 million front-end engineers globally and an average developer tooling/DX spend around $400/year (a $4.8B addressable market), slow cold starts bite productivity across organizations and amplify when packages are centralized in monorepos. The product would be a developer-focused service and set of integrations that seed and prewarm local dev bundler caches by publishing deterministic build artifacts from CI or a centralized cache and automatically restoring them on developer machines or cloud workspaces. Implementation would include lightweight CLIs and plugins for Turbopack, Vite, esbuild and orchestration tools like Turborepo/Nx, signing & verification for artifact integrity, cache-key strategies to minimize invalidation, and optional SaaS-distributed cache mirrors to reduce latency. Market timing is favorable: monorepo centralization, the rise of remote/cloud dev, and growing support for persistent disk caches in build tooling all converge to make cache seeding practical and valuable now; internal estimates and analogous caching systems suggest potential reductions in cold-start time on the order of multiplex, directly improving developer experience. Strengths are low direct competition, a high market score (88/100) and solid revenue potential (78/100) if you can productize integrations and a simple developer UX; challenges are nontrivial—engineering to handle diverse bundlers and languages, cache invalidation correctness, storage costs and security/compliance concerns—that will determine whether this becomes a niche utility or a broadly adopted platform.