Fourth module of the tool/ coverage task, and the first of the four large
ones. Split into checks and loaders/main() up front rather than discovering
the 250-line cap afterwards -- 245 and 225 lines.
Every check is asserted on its *message*, not merely on having raised. The
whole reason this tool exists is that the misconfigurations it catches are
indistinguishable once data has started moving, so a check firing with the
wrong explanation sends the reader to the wrong place. That includes the
wrong-region 404, which answers with a correctUrl body rather than an error
and would otherwise pass preflight, pass sign-in against a different host
entirely, and only break mid-migration.
main()'s stated contract is pinned too: cheapest-first ordering, and that it
short-circuits -- a typo must be reported without a network round trip, so
the later network checks must not run at all.
The module's config paths are module-level constants pointing into the real
~/.config/crdt-sync, so the fixture redirecting them at tmp_path is autouse:
a test that forgot it would read and report on the user's actual credentials.
Confirmed afterwards that ~/.config/crdt-sync was not touched.
crdt_sync 293 -> 333 passed, still 100%. 4 of 7 tool/ modules done.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CFSGeWxHPY5rHUGrPqhcmG
