Persist private checkpoint restore preimages - #467
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Persist private checkpoint restore preimages#467devin-ai-integration[bot] wants to merge 1 commit into
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Summary
Add a provider-free private checkpoint CAS for crash-safe resume and checkpoint ladders.
writePrivateCheckpoint()stores restore URI/path preimages in an owner-only0700/0600directory and returns only a hash-bound public receipt.readPrivateCheckpoint()restores by checkpoint ID and verifies the preimage hash;orderCheckpointReceipts()provides deterministic ladder ordering without exposing paths.Tests cover zero-network ladder resume, owner-only permissions, receipt redaction, and tamper detection. This is intentionally separate from PR #466 and lifecycle PR #465.
Link to Devin session: https://app.devin.ai/sessions/23d3bbcf33b34ddda0fb4f3ebbf16607