Maybe this might be helpful - Spec-Driven Development Workflow for Claude Code https://news.ycombinator.com/item?id=48231575

Its not a single skill, but a set of skill, organized into a workflow with design to be able to /clear the context or restart the session after each step.

There is a chain of specs delivered:

- requirements

- code analysis (optional)

- design (with split task into X subtasks)

- verification

- self-improvement

Each task is implemented in its own session, completely isolated, having clear and focused context.

Also works extremely nicely with a fleet of agents.