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Vibe coding works beautifully until it doesn't. The ceiling shows up somewhere between prototype and production: no audit trail, no review, no way to evolve the system across multiple deployments, no way to know whether yesterday's change broke today's invariants.

Spec-Driven Development is an emerging practice, but for most people it just means a collection of stale organically structured markdown documents, covering more or less the entirety of the system.

This article introduces the concept of a Sekkei (blueprint) and Generative Lifecycle Management (GLM).

Git repo for Sekkei specification and GLM Server.

Follow up article: - Vibe Designing with Claude Code (using GLM CLI) - How to scale GLM to a small team?