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Module 10 Refactoring Guide

Page Maps

graph LR
  family["Python Programming"]
  program["Python Functional Programming"]
  section["Refactoring Performance Sustainment"]
  page["Module 10 Refactoring Guide"]
  capstone["Capstone evidence"]

  family --> program --> section --> page
  page -.applies in.-> capstone
flowchart LR
  orient["Orient on the page map"] --> read["Read the main claim and examples"]
  read --> inspect["Inspect the related code, proof, or capstone surface"]
  inspect --> verify["Run or review the verification path"]
  verify --> apply["Apply the idea back to the module and capstone"]

Read the first diagram as a placement map: this page is one concept inside its parent module, not a detached essay, and the capstone is the pressure test for whether the idea holds. Read the second diagram as the working rhythm for the page: name the problem, study the example, identify the boundary, then carry one review question forward.

This guide closes the course. The final standard is sustainment: can the codebase keep its semantics, evidence, and review discipline while performance pressure and team change keep arriving.

Stable comparison route

  1. run make PROGRAM=python-programming/python-functional-programming history-refresh
  2. open capstone/_history/worktrees/module-10/
  3. compare the live capstone with your understanding of its proof, inspection, and confirmation routes
  4. run make PROGRAM=python-programming/python-functional-programming capstone-confirm when you need the strongest public route

What to refactor toward

  • performance and observability changes that preserve boundaries instead of bypassing them
  • regression evidence that survives refactor and migration work
  • governance notes that explain ownership, compatibility, and public review standards
  • a capstone that a future maintainer can inspect without reverse-engineering the course

Exit standard

At the end of the course, you should be able to explain not only what the architecture is, but how it can evolve without losing the guarantees the earlier modules established.