[RCmerci]

Summary

Journal writes can invalidate an in-flight timeline date continuation. Recover the current Root_dates scan with at most two cursorless reads, resuming inclusively at its oldest observed date. Deduplicate already observed UUIDs on that boundary date without dropping unseen same-day pages. Preserve the loaded prefix, remaining root quota, generation ownership and strict Overlay cursor validation.

Add one public Production_runtime regression covering replay, same-day UUIDs, retry exhaustion and superseded scans, with red/green verification.

Validation

• dune build @all app/native_embed.exe.o, dune runtest --force, and git diff --check passed on ffd787c839aa9ae9645d0f2aada097b94fc1d8b6.
• Real iOS 26.5 Simulator, authorized ocaml-sync-test graph: baseline/control captures reproduced staleReadCursor / listTimelineDates in 3/3 attempts; patched captures did not reproduce it in 3 attempts. Final two cycles verified immediate post-capture/append state, task status, refresh/history and restart persistence. All four exact test-owned subtrees were cleaned up; final App diagnostics Current/Ready/Open, zero outbox.
• spec-dev-tool and ocamlformat unavailable in the prepared environment; those checks are not claimed.
• Source-bound experimental host-restamped App, cross_abi_validated=false; no physical-device, macOS or independent server-readback claim.

Unresolved observation

The first patched run recorded a separate invalidRequest / graphRequest / admission without a request ID. It did not recur in one header-only control or the final two patched cycles. Neither its cause nor its resolution is established; this PR does not claim to fix it or establish an all-green product result.

Final Simulator evidence

Doing + appended child	Done + appended child

Link to Devin session: https://app.devin.ai/sessions/ebe2c4b314574e34af37fb03fa521c1a
Open in Devin Desktop: https://app.devin.ai/desktop/session/ebe2c4b314574e34af37fb03fa521c1a?variant=devin
Requested by: @RCmerci

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-27T15:06:57.369513Z	ffd787c	PR opened

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