Review: fix(cli): emit PowerShell-compatible model-cleanup command on Windows

Summary

Correct, well-scoped fix — approve. The Windows recovery hint in gaia init printed cmd's rmdir /s /q, which errors when pasted into PowerShell (GAIA's assumed Windows shell), so the recovery steps the verification output told users to run were unfollowable. Swapping to Remove-Item -Recurse -Force resolves it, and the diff matches the stated intent exactly: the non-win32 rm -rf branch is untouched (init_command.py:1824-1827), and no other rmdir /s /q remains anywhere in src/. The Remove-Item -Recurse -Force form is consistent with how the rest of the repo writes PowerShell delete commands (src/gaia/apps/jira/webui/run.ps1, .github/actions/setup-venv/action.yml, docs/quickstart.mdx), so the "already used elsewhere" claim in the description checks out.

The one thing worth knowing: there's still no test guarding this branch — see below.

Issues

🟢 Minor — No regression guard for the cleanup-hint strings

tests/unit/test_init_command.py has 78 tests but none exercise the failed-model cleanup hint, so nothing stops a future edit from reverting to cmd syntax. You already flagged this as a non-blocking follow-up in the description, which is the right call — a focused fix shouldn't be held up for it. A small parametrized test asserting the win32 (Remove-Item -Recurse -Force) vs non-win32 (rm -rf) form, patching sys.platform, would close the loop. Not blocking.

Strengths

• Minimal, surgical diff — one platform branch changed, nothing else touched; reads cleanly against the surrounding rm -rf path.
• The added comment states the why (cmd syntax isn't valid PowerShell) in one line, exactly the WHY-only style CLAUDE.md asks for — not a what-it-does narration.
• PR description leads with user-observable impact (before: copy-paste recovery fails on Windows; after: it works) and links Quickstart guide unexpected WARNING #554.

Verdict

Approve. No blocking issues. The missing regression test is a genuine nice-to-have that the author has already acknowledged as a follow-up — safe to merge as-is, ideally with that test added in a quick follow-up PR.