* test: focus assertions on behavioral evidence
Prune redundant and wording-coupled checks while retaining diagnostic, parser, recovery, and cleanup coverage.
* refactor: remove test-only wrappers and duplicate checks
Exercise production operations through test fixtures, remove unused adapters, and keep managed-member uncertainty guidance under its existing owner.
* test: focus process validation on diagnostic facts
* refactor: remove test-only runtime helpers
Move semantic evidence fixture setup out of runtime and remove unused Windows settle recovery helpers while checking configured defaults independently.
* test: focus artifact diagnostics on format facts
* test: verify retained cleanup guidance delivery
Read shadowed registrations from the effective JSONC syntax tree before
any client is changed. Share the same typed ownership decision with the
reread before removal, including foreign OpenCode V1 fallbacks. Remove
all admitted duplicates using one member/separator planner and grant
serializer authority only for exact admitted paths.
Setup may remove its explicitly superseded OpenCode V1 path. Preserve
inactive repeated parents, unrelated entries, comments and source backups.
Use the pinned JSONC scanner instead of handwritten string decoding.
Validation: final 86 focused cases and 9 setup acceptance cases passed;
104 additional filesystem consumer cases passed. Static/architecture,
docs and discovery checks passed. A broader 186-case run had one OMP
timeout; its isolated 9-case rerun passed, with timeout cause unverified.
Controlled compiled CLI comparisons verify removal/refusal and backups;
real developer-client execution remains unverified.
Adapted from #4977 at 4cd22d4ec2.
Closes#4976
Co-authored-by: Nikhil Bhagat <knewboy.nykhil@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
morluto