Specs & plans (agentic reference)
The design specs and implementation plans live under docs/superpowers/ and are
kept in place rather than folded into this book. They are the format the
subagent-driven workflow consumes directly: docs/superpowers/specs/ holds the
design specs (what to build and why), and docs/superpowers/plans/ holds the
implementation plans (the step-by-step instructions a subagent executes). Keeping
them in their native layout means an agent can read them as-is, so they remain the
canonical agentic reference.