fix(storage): write json files atomically#28010
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Issue for this PR
Closes #27843
Type of change
What does this PR do?
JSON writes now go through a same-directory temporary file and are published with
rename. This keeps readers from observing partially written storage files, includingsession_diff/*.json, while preserving the existing storage locks and directory creation behavior.How did you verify your code works?
bun test test/filesystem/filesystem.test.ts --timeout 30000bun typecheckfrompackages/corebun typecheckfrompackages/opencodebun turbo typecheckbunx prettier --check packages/core/src/filesystem.ts packages/opencode/test/filesystem/filesystem.test.tsgit diff --checkScreenshots / recordings
Not applicable; this is a storage write-path fix covered by filesystem tests.
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