SDK 0.6.1 README editorial revision — 2026-10-30

CC requested readable product prose matching PyCForge's README, with no
development-cycle status, and clear explanations of human/AI use and capabilities
received through PyCForge.

The README now explains purpose, desktop/console/Python use, installation,
interpreter selection, engine-provided updates, project authoring, current scalar
and array scope, native verification, packaging, registration, and offline Help.
It distinguishes compatible engine additions from updates to the separate SDK
application. Stale array exclusions were corrected to include extrema reductions.
Historical development sections were removed from the maintained README; its
previous text remains in docs/history. Editorial requirements are recorded in
docs/README-GUIDELINES.md and referenced by AGENTS.md.

Checks completed before packaging:
- README renders through the PyPI Markdown renderer without warnings.
- Seven documented CLI commands parse against the public parser and complete
  against installed SDK 0.6.1 and PyCForge 1.3.69 in separate environments:
  connect, templates, new, scan, verify, readiness, build.
- The example cube-root project passes its declared native fixtures using GCC
  and creates a package. It is not registered into the normal user registry.
- The Python API example runs against the installed SDK and lists all five
  engine-provided starter projects.
- Version heading remains aligned with unpublished SDK 0.6.1. No production
  implementation, GUI, engine conversion logic, or bundled import is changed.

Command output and renderer results are retained in evidence/readme_2026_10_30.
The external handoff report records final archive checks and replacement hashes.
The earlier implementation qualification remains applicable to unchanged product
code; this documentation revision does not claim a new full regression run or
native Windows/macOS testing. No publication was performed; CC alone publishes.
