[callzhang]

Markdown exports can omit table alignment markers while the stored JSONML still has the requested paragraph alignment. The current verifier then rejects a completed write.

Read full JSONML for Markdown with explicitly aligned columns, check the target table/row/cell alignment, and only then restore the proven alignments in the Markdown comparison AST. Preserve rendered HTML equivalence and structural/content checks, append boundaries, failed reads and incomplete/malformed JSONML failures. Writes are not replayed. Compact receipts retain a hash of the JSONML alignment evidence.

Also correct a text-fingerprint defect exposed by the same case: joining escaped text fragments must not insert a space that was never authored. Empty content updates keep content verification; empty creates retain their existing metadata check.

Validation: fail-first regressions and the full document shortcut package pass locally; go vet passes. An offline historical fixture passes after the fix, with controls for real alignment loss and content changes. Fixtures committed here are synthetic; no private document bodies or logs are included. No commands, permissions, confirmation policy or write retry budget changed.