Add an explicit rule that agents must always check whether README.md needs updating before handing work off.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Clarify in the agent guidelines that experiments, workarounds, helpers, and test paths that do not end up in the final correct solution must be removed before handoff.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Add non-negotiable engineering principles, technology convention rules
with language-specific examples, and code quality/structure guidelines.
Renumber existing sections to fit the expanded structure.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
