docs(format): update LTX format specification - #92
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corylanou merged 2 commits intoAug 12, 2026
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Document the current v3 header, flags, compressed page frames, page index, and trailer layout. Clarify that the file checksum covers decompressed page data and structural bytes instead of the raw compressed file stream. Refs #83
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benbjohnson
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Aug 12, 2026
corylanou
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August 12, 2026 16:14
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Aug 12, 2026
The README rewritten in #92 says LTX carries no on-disk version field and a reader cannot determine the version from the file. Version 4 changes the magic to LTX4, so both statements became wrong on this branch, and nothing described encryption at all. Covers the LTX1/LTX4 split and why unencrypted output stays v3, the v4 header fields and encryption flag, the recipient block and key derivation, encrypted page frame layout and AAD binding, the page index auth tag, and the fact that encrypted files hash ciphertext so integrity is verifiable without a key.
This was referenced Aug 12, 2026
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Summary
Fixes #83
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