phxstack-document

Maintain only these files:

docs/overview.md
docs/architecture.md
docs/reference.md

Read the code first: structure, entry points, important modules, data, configuration, runtime, and actual development and test commands. Document the system that exists.

When the files exist, update only what changed and preserve valid human-written material. Every command must come from the repository. If a boundary has no clear rationale, say that it is unclear rather than inventing one.