Create Architecture

This skill produces docs/architecture/architecture.md — the master architecture document that translates all approved GDDs into a concrete technical blueprint. It sits between design and implementation, and must exist before sprint planning begins.

Distinct from /architecture-decision: ADRs record individual point decisions. This skill creates the whole-system blueprint that gives ADRs their context.

Resolve the review mode (once, store for all gate spawns this run):

1. If --review [full|lean|solo] was passed → use that
2. Else read production/review-mode.txt → use that value
3. Else → default to lean

See .claude/docs/director-gates.md for the full check pattern.